CUET UG Biology Booster Test 3 Infertility and ART Techniques -

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CUET UG Biology Booster Test 3 Infertility and ART Techniques

⏱️ 30 Minutes

❓ 20 Questions

📌 Answers are locked once submitted — results and explanations appear at the end.

CUET UG Biology Booster Test 3 Infertility and ART Techniques

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QUESTION 1 OF 20

How does the social stigma associated with STIs directly contribute to the development of PIDs in females?

Answer Review

1 How does the social stigma associated with STIs directly contribute to the development of PIDs in females?

A Stigma increases the virulence of the infection

B Stigma deters infected persons from seeking timely detection and treatment

C Stigma makes the symptoms disappear temporarily

D Stigma prevents the infection from reaching the pelvic region

💡 Short Explanation

Social stigma creates fear of judgment or ostracization. This prevents individuals from visiting clinics for early, asymptomatic screenings. Delayed intervention allows infections to ascend to the pelvic organs, causing PID.

✅ Correct Answer Explanation

The correct answer is ( B). In reproductive health, the primary barrier to preventing long-term complications like PID is the delayed diagnosis. Social stigma acts as a psychological deterrent, preventing women from seeking medical help when they notice minor or even no symptoms. By the time they seek treatment, the infection has often ascended from the lower reproductive tract (vagin A) to the upper tract (uterus, fallopian tubes, and ovaries), resulting in Pelvic Inflammatory Disease (PI D).

❓ Why Other Options Are Incorrect

Option A → Stigma is a social construct; it has no biological mechanism to alter bacterial or viral virulence.
Option C → Stigma does not affect the physical manifestation of the infection; it only affects the patient's reaction to it.
Option D → Stigma has no physical capability to block the anatomical spread of pathogens within the body.

🎯 Strategy

Used: Contextual/Tonal Matching

Application: Analyze the link between sociological barriers and medical outcomes.

Final Logic: Stigma leads to silence, which leads to progression of disease.

🧠 Memory Trick

"Stigma = Silence = Spread of Infection."

📚 Class XII – Biology – Chapter: Reproductive Health – Topic: STIs –

2 Which of the following analytical statements about STI complications is NOT supported by the text?

A Early symptoms like itching and fluid discharge are often minor.

B Absence of symptoms in early stages is common in females.

C STIs only lead to complications if the person is over 24 years old.

D Complications can include cancer of the reproductive tract.

💡 Short Explanation

STIs are age-independent in their ability to cause damage. The text does not specify an age threshold of 24 for complications. Complications are based on the duration of untreated infection, not patient age.

✅ Correct Answer Explanation

The correct answer is ( C). There is no scientific evidence or NCERT-stated fact suggesting that STI complications are exclusive to individuals over 24 years of age. STIs can cause severe reproductive damage in any sexually active individual regardless of their age.

❓ Why Other Options Are Incorrect

Option A → This is a common clinical observation supported by the text's description of early-stage STIs.
Option B → This is a key diagnostic challenge noted in reproductive health literature.
Option D → The text explicitly lists reproductive tract cancer as a potential long-term complication of STIs.

🎯 Strategy

Used: Extreme Word Filter

Application: The word "only" and the specific age "24" are indicators of an factually incorrect absolute statement.

Final Logic: STIs are indiscriminate of age regarding complications.

🧠 Memory Trick

"STIs ignore birthdays."

📚 Class XII – Biology – Chapter: Reproductive Health – Topic: STIs –

3 Match the complex cause of infertility with its potential diagnostic/corrective outcome:

List-I	List-II
1. Immunological	i. Use of donor gametes or ART
2. Psychological	ii. Corrective treatment in clinics
3. Congenital	iii. Overcoming body's resistance
4. Physical	iv. Emotional counseling and support

A 1-iii, 2-iv, 3-i, 4-ii

B 1-i, 2-ii, 3-iii, 4-iv

C 1-iv, 2-iii, 3-ii, 4-i

D 1-ii, 2-i, 3-iv, 4-iii

💡 Short Explanation

Immunological: Body resists own/partner's gametes. Psychological: Stress/anxiety requires counseling. Congenital: Often requires donor gametes/advanced ART. Physical: Corrective medical/surgical treatment.

✅ Correct Answer Explanation

The correct answer is ( A). 1-iii: Immunological infertility involves the immune system attacking gametes, requiring the body's resistance to be overcome. 2-iv: Psychological factors involve emotional stress, managed by counseling. 3-i: Congenital structural defects are often non-correctable, necessitating donor gametes or advanced ART. 4-ii: Physical blockages or hormonal imbalances are often amenable to direct medical or surgical corrective treatment.

❓ Why Other Options Are Incorrect

Options B, C, D → These pairings misalign the cause with the appropriate clinical intervention .

🎯 Strategy

Used: Option Grouping

Application: Group the "cause" with the "remedy" based on standard clinical practice in fertility management.

Final Logic: Logical mapping of etiology to treatment.

🧠 Memory Trick

"Immuno = Resistance, Psycho = Counseling."

📚 Class XII – Biology – Chapter: Reproductive Health – Topic: Infertility –

4 Analyze why infertility clinics may not always be able to provide "corrective treatment" for all couples.

A Because all infertility is psychological

B Because some disorders require specialized assisted reproductive technologies (ART)

C Because clinics only treat the female partner

D Because medications are never effective for physical factors

💡 Short Explanation

Not all infertility is curable via basic medication/surgery. Advanced cases require bypassing natural fertilization (ART). Corrective treatment is only for "correctable" disorders.

✅ Correct Answer Explanation

The correct answer is ( B). "Corrective treatment" implies returning the reproductive system to normal functioning. However, many forms of infertility (e.g., severe male factor, blocked tubes, advanced age) are non-correctable by standard medical or surgical means. In these instances, clinics shift from "corrective" to "assistive" approaches using ART (like IVF, ICSI, etc.).

❓ Why Other Options Are Incorrect

Option A → Infertility is multifactorial, not exclusively psychological.
Option C → Clinics treat both partners.
Option D → Medications are often effective for physical factors (e.g., hormone therapy).

🎯 Strategy

Used: Elimination

Application: Eliminate based on the distinction between curing (correcting) and bypassing (ART).

Final Logic: ART is the solution when correction is impossible.

🧠 Memory Trick

"Cannot fix? Then assist!"

📚 Class XII – Biology – Chapter: Reproductive Health – Topic: Infertility –

5 Regarding the scope of ART:
I. IVF followed by ET is one of several available methods.
II. ET can involve embryos formed by either in-vitro or in-vivo fertilisation.

A I is true, II is false

B I is false, II is true

C Both I and II are true

D Both I and II are false

💡 Short Explanation

ART includes a variety of procedures (IVF, ZIFT, GIFT, IUI). ET (Embryo Transfer) is a general step following fertilization, whether that occurred in a dish or via other methods like GIFT/in-vivo fertilization.

✅ Correct Answer Explanation

The correct answer is (C). ART encompasses multiple techniques including IVF, ZIFT, GIFT, and AI. ET is the final step in several of these processes. Embryos can indeed be formed via in-vitro fertilization (standard IVF) or in-vivo fertilization (where gametes are handled and returned to the body, as in GIFT or similar transfer techniques).

❓ Why Other Options Are Incorrect

Options A, B, D → These ignore the fact that ART is a broad spectrum and ET is a versatile clinical step.

🎯 Strategy

Used: Substitution

Application: Substitute definitions of ART and ET to confirm validity of both statements.

Final Logic: Both statements accurately reflect the diversity of modern fertility medicine.

🧠 Memory Trick

"ART = Many methods, ET = Common goal."

📚 Class XII – Biology – Chapter: Reproductive Health – Topic: ART –

6 The choice between ZIFT and IUT is primarily determined by:

A The age of the female partner

B The number of blastomeres in the embryo

C The sperm count of the male partner

D The location of the clinic

💡 Short Explanation

ZIFT: Zygote/Early embryo (≤ 8 cells). IUT: Advanced embryo (> 8 cells). The developmental stage dictates the anatomical site of transfer.

✅ Correct Answer Explanation

The correct answer is ( B). The fundamental difference between ZIFT and IUT as outlined in the curriculum is the developmental stage of the embryo. Embryos with up to 8 blastomeres are transferred into the fallopian tube (ZIFT), while those with more than 8 blastomeres are transferred into the uterus (IUT).

❓ Why Other Options Are Incorrect

Option A → While age is a factor for success, it does not determine the specific procedure chosen between ZIFT/IUT.
Option C → Sperm count dictates whether ICSI or AI is used, not the specific transfer location for a pre-formed embryo.
Option D → Clinic location is irrelevant to the medical procedure protocol.

🎯 Strategy

Used: Substitution

Application: Substitute the criteria for ZIFT (≤ 8) and IUT (> 8) to verify.

Final Logic: The "stage" of the embryo is the deciding biological factor.

🧠 Memory Trick

"8 is the border: ≤8 Fallopian, >8 Uterus."

📚 Class XII – Biology – Chapter: Reproductive Health – Topic: ZIFT and IUT –

7 Analyze the biological sequence of ZIFT:
1. Induction of zygote formation in simulated conditions
1. Collection of gametes from wife and husband
1. Transfer of an 8-blastomere embryo to the fallopian tube

A 2-1-3

B 1-2-3

C 3-2-1

D 2-3-1

💡 Short Explanation

First, gametes must be collected. Second, zygote/embryo is formed in the lab. Third, transfer occurs.

✅ Correct Answer Explanation

The correct answer is ( A). The clinical flow must follow the logical sequence: First, gametes (ovum and sperm) are collected (2). Next, they are placed in simulated conditions to achieve fertilisation and form the zygote (1). Finally, after reaching the 8-cell stage, the embryo is transferred into the fallopian tube (3).

❓ Why Other Options Are Incorrect

Options B, C, D → The steps are logically inconsistent (e.g., you cannot transfer before collection).

🎯 Strategy

Used: Elimination

Application: Eliminate sequences that do not start with gamete collection.

Final Logic: Collection -> Fertilization -> Transfer.

🧠 Memory Trick

"Get -> Grow -> Give."

📚 Class XII – Biology – Chapter: Reproductive Health – Topic: ZIFT –

8 Why is the precision handling of "early embryos" critical in the ZIFT procedure?

A Because they must be transferred before they reach 8 blastomeres

B Because the procedure requires extremely high precision and specialized professionals

C Because they are naturally formed within the uterus

D Because they must be injected directly into the ovum

💡 Short Explanation

ART procedures, especially embryo transfers, involve microscopic manipulation. Any error could damage the fragile, early-stage embryo.

✅ Correct Answer Explanation

The correct answer is ( B). ZIFT involves handling very small, delicate structures (zygotes/early embryos) and requires insertion into the narrow lumen of the fallopian tube. This is a complex medical procedure necessitating expert laboratory staff and high-precision instruments to ensure the viability of the embryo during transfer.

❓ Why Other Options Are Incorrect

Option A → The embryo can be at the 8-cell stage; it doesn't have to be before it reaches it.
Option C → They are formed in the lab, not the uterus, in ZIFT.
Option D → ICSI is the injection into the ovum, not ZIFT.

🎯 Strategy

Used: Contextual/Tonal Matching

Application: Identify the requirement for clinical expertise.

Final Logic: Complex delicate task = High precision required.

🧠 Memory Trick

"Small embryos = Big expertise."

📚 Class XII – Biology – Chapter: Reproductive Health – Topic: ZIFT –

9 Logic of the IUT procedure:
1. Formation of embryo in lab
1. Embryo develops more than 8 blastomeres
1. Implantation in the uterus for further development

A 1-2-3

B 2-1-3

C 3-2-1

D 1-3-2

💡 Short Explanation

Fertilization happens (1). Growth continues to the blastocyst stage (2). Placement in the uterus for implantation (3).

✅ Correct Answer Explanation

The correct answer is ( A). IUT follows a logical biological progression. Fertilisation is achieved in a lab environment (1). The resulting embryo is cultured until it exceeds 8 cells, typically reaching the blastocyst stage (2). It is then transferred directly into the uterus, where it settles into the endometrium for successful implantation and pregnancy (3).

❓ Why Other Options Are Incorrect

Options B, C, D → These do not follow the biological development timeline.

🎯 Strategy

Used: Substitution

Application: Follow the natural developmental timeline of an embryo.

Final Logic: Form -> Mature -> Implant.

🧠 Memory Trick

"Create -> Cultivate -> Connect."

📚 Class XII – Biology – Chapter: Reproductive Health – Topic: IUT –

10 Match the condition with the appropriate Assisted Reproductive Technology (ART):

List I	List II
1. Cannot produce ova	a. GIFT
2. Low sperm count	b. AI/IUI
3. Embryo with more than 8 blastomeres	c. IUT
4. Male unable to inseminate	d. AI

A 1-a, 2-b, 3-c, 4-d

B 1-b, 2-a, 3-d, 4-c

C 1-c, 2-d, 3-a, 4-b

D 1-d, 2-c, 3-b, 4-a

💡 Short Explanation

GIFT is used when the woman cannot produce ova but can support fertilization. AI/IUI helps overcome low sperm count. IUT transfers embryos with more than 8 blastomeres into the uterus. AI is useful when the male cannot inseminate naturally.

✅ Correct Answer Explanation

According to NCERT, GIFT (Gamete Intra Fallopian Transfer) is recommended for women who cannot produce ova but have a normal reproductive tract and can receive donor ova. Artificial Insemination (AI) or Intrauterine Insemination (IUI) is commonly used when the male partner has a low sperm count or poor sperm motility. Intra Uterine Transfer (IUT) involves transferring embryos with more than eight blastomeres into the uterus, while AI is also suitable when the male is unable to inseminate naturally.

❓ Why Other Options Are Incorrect

Option B → Incorrectly interchanges GIFT and AI/IUI.
Option C → Incorrectly associates IUT and AI with unrelated conditions.
Option D → Does not follow the NCERT indications for ART procedures.

🎯 Strategy

Used: Clinical Scenario Matching

Application: Match each infertility condition with the ART technique specifically recommended in NCERT.

Final Logic:

No ova → GIFT
Low sperm → AI/IUI
>8 blastomeres → IUT
Unable to inseminate → AI

🧠 Memory Trick

"No Egg → GIFT; Low Sperm → IUI; >8 Cells → IUT; No Insemination → AI."

📚 Class XII – Biology – Chapter: Reproductive Health – Topic: Assisted Reproductive Technologies (ART)

11 Analyze the necessity of the "suitable environment" in GIFT. Why must the recipient provide this?

A Because fertilisation occurs inside the recipient's body

B Because the ovum is already fertilised before transfer

C Because it is a form of in-vitro fertilisation

D Because the embryo is transferred at the 16-blastomere stage

💡 Short Explanation

GIFT involves transferring unfertilised gametes (ova and sperm) into the fallopian tube. The actual process of fertilisation takes place naturally within the body (in-vivo). Therefore, the recipient's reproductive system must provide the biological environment for this to occur.

✅ Correct Answer Explanation

The correct answer is ( A). Unlike IVF, where fertilisation is handled in the laboratory, GIFT relies on the female body to facilitate the union of the sperm and egg. This requires the recipient to have healthy internal conditions—specifically the fallopian tubes—to support the meeting of gametes and the subsequent early development of the zygote.

❓ Why Other Options Are Incorrect

Option B → If the ovum were already fertilised, it would be a ZIFT procedure, not GIFT.
Option C → GIFT is not IVF; it bypasses the laboratory fertilisation step.
Option D → Transfer occurs at the gamete stage, not the 16-blastomere stage.

🎯 Strategy

Used: Substitution

Application: Substitute "In-Vivo" (within the body) to understand why the environment is critical.

Final Logic: GIFT = Internal Fertilisation = Need for internal environment.

🧠 Memory Trick

"GIFT = Gamete (internal) = Garden (Body)."

📚 Class XII – Biology – Chapter: Reproductive Health – Topic: GIFT –

12 Which factor is NOT a deterrent in the adoption of GIFT or other ART methods?

A High cost and limited availability

B Emotional and religious factors

C Social factors

D Statutory ban on the procedure

💡 Short Explanation

ART methods are legally permitted medical procedures. The primary barriers are high costs, emotional struggles, and religious/social stigma. There is no national statutory ban on these procedures.

✅ Correct Answer Explanation

The correct answer is ( D). While ART methods face significant barriers—including extreme financial costs, limited access in many regions, and various social/religious beliefs—they are not subject to a "statutory ban." They are recognized, regulated medical practices in most countries, including India.

❓ Why Other Options Are Incorrect

Option A → Cost is a major, widely recognized deterrent.
Option B → Emotional stress and religious views often influence the decision to undergo ART.
Option C → Social factors (like stigma or family pressure) are major hurdles.

🎯 Strategy

Used: Elimination

Application: Eliminate based on factual reality regarding medical legality.

Final Logic: ART is a legal medical field, not a banned practice.

🧠 Memory Trick

"ART is legal, but pricey."

📚 Class XII – Biology – Chapter: Reproductive Health – Topic: ART –

13 Regarding the technicality of ICSI:
I. It requires expensive instrumentation and specialized professionals.
II. It bypasses the need for a sperm to naturally penetrate the ovum.

A I is true, II is false

B I is false, II is true

C Both I and II are true

D Both I and II are false

💡 Short Explanation

ICSI is highly advanced, requiring micro-manipulators and expert embryologists. It mechanically delivers the sperm into the egg, removing the requirement for the sperm to undergo the acrosome reaction or zona penetration naturally.

✅ Correct Answer Explanation

The correct answer is ( C). ICSI is the most advanced form of IVF. It necessitates high-cost micromanipulation systems and highly trained specialists (I). Because the sperm is injected via a needle through the zona pellucida directly into the cytoplasm, the sperm does not have to perform its natural duty of penetration (II).

❓ Why Other Options Are Incorrect

Options A, B, D → These are incorrect as both statements are standard technical definitions of ICSI.

🎯 Strategy

Used: Contextual/Tonal Matching

Application: Align the "technicality" of the procedure with the clinical requirements described in the curriculum.

Final Logic: ICSI = High tech + Manual bypass.

🧠 Memory Trick

"ICSI = Injection = Manual entry."

📚 Class XII – Biology – Chapter: Reproductive Health – Topic: ICSI –

14 In what scenario would ICSI be preferred over simple IVF?

A When the female cannot produce an ovum

B When there is a need for direct injection due to sperm-related issues

C When the fallopian tubes are blocked

D When legal adoption is the goal

💡 Short Explanation

ICSI is specifically designed for severe male infertility. When sperm count is very low or motility is poor, they cannot penetrate the egg on their own, making injection necessary.

✅ Correct Answer Explanation

The correct answer is ( B). Simple IVF involves mixing eggs and sperm in a dish and allowing "natural" fertilisation. ICSI is preferred when the sperm are unable to penetrate the egg due to poor quality, count, or motility. It is a "rescue" technique for male-factor infertility.

❓ Why Other Options Are Incorrect

Option A → If the female cannot produce an ovum, an ovum donor is needed, but ICSI itself doesn't solve that.
Option C → Blocked tubes are solved by IVF/ET, not necessarily by switching to ICSI.
Option D → ICSI is a medical procedure, not an alternative to adoption.

🎯 Strategy

Used: Elimination

Application: Identify the specific medical indication for ICSI vs standard IVF.

Final Logic: Male infertility issues = ICSI.

🧠 Memory Trick

"ICSI solves Sperm issues."

📚 Class XII – Biology – Chapter: Reproductive Health – Topic: ICSI –

15 Analytical steps in Artificial Insemination:
1. Semen collection
2. Semen introduction into vagina or uterus
3. Correction of infertility due to low sperm count

A 1-2-3

B 2-1-3

C 3-2-1

D 1-3-2

💡 Short Explanation

The sequence begins with correction of infertility due to low sperm count. This is followed by semen introduction into the vagina or uterus. Finally, semen collection completes the given sequence.

✅ Correct Answer Explanation

According to the given sequence: (3) Correction of infertility due to low sperm count is the starting point. (2) Semen is then introduced into the vagina or uterus. (1) Semen collection appears last in the required arrangement. Thus, the sequence 3 → 2 → 1 matches Option C.

❓ Why Other Options Are Incorrect

Option A follows a different order and does not match the required sequence.
Option B begins with semen introduction instead of correction of infertility.
Option D places semen collection before the specified starting point.

🎯 Strategy

Used: Sequence Matching

Application:

Compare each option with the required order and select the one that reproduces the sequence exactly.

Final Logic:

Only Option C matches 3 → 2 → 1.

🧠 Memory Trick

Problem → Procedure → Collection

📚 Class XII – Biology – Chapter: Reproductive Health – Topic: Artificial Insemination (AI)

16 Artificial Insemination is NOT an effective solution for:

A Males with very low sperm counts

B Males unable to inseminate the female tract

C Females with blocked fallopian tubes preventing fertilisation

D Couples needing donor semen due to male-factor infertility

💡 Short Explanation

AI delivers sperm to the tract. If the tubes are blocked, the sperm cannot reach the egg, and the egg cannot reach the sperm. Tubal blockage requires IVF/ET to bypass the tubes entirely.

✅ Correct Answer Explanation

The correct answer is ( C). Artificial Insemination only increases the volume/concentration of sperm reaching the upper tract. It does not resolve physical structural blockages (like blocked fallopian tubes). To overcome blockages, the embryo must be created outside (IVF) and transferred past the blockage (IUT).

❓ Why Other Options Are Incorrect

Option A, B, D → These are all primary reasons to utilize Artificial Insemination.

🎯 Strategy

Used: Elimination

Application: Eliminate procedures that solve tube-related issues.

Final Logic: AI = sperm delivery; Blocked tubes = structural barrier.

🧠 Memory Trick

"AI is for delivery, not for bypassing barriers."

📚 Class XII – Biology – Chapter: Reproductive Health – Topic: AI –

17 Which analytical statement about IUI is NOT correct based on the text?

A It is a variation of artificial insemination.

B Semen is introduced directly into the uterus.

C It requires high precision handling by specialized professionals.

D It is the primary method used for legal adoption.

💡 Short Explanation

IUI is a medical procedure for infertility. Legal adoption is a social/legal process for parenting orphans. They are completely unrelated categories.

✅ Correct Answer Explanation

The correct answer is ( D). IUI (Intra-uterine insemination) is an Assisted Reproductive Technology (ART) procedure. Legal adoption is a social process involving the permanent transfer of parental rights and responsibilities. They are fundamentally distinct, and IUI has no role in the adoption process.

❓ Why Other Options Are Incorrect

Option A → IUI is indeed a form of AI.
Option B → The "U" in IUI stands for "Uterine," confirming the location.
Option C → All ART procedures require professional clinical handling.

🎯 Strategy

Used: Odd One Out

Application: Differentiate between medical ART procedures and social/legal processes.

Final Logic: IUI is medical; adoption is social.

🧠 Memory Trick

"IUI makes babies; Adoption gives homes to babies."

📚 Class XII – Biology – Chapter: Reproductive Health – Topic: IUI/Adoption –

18 IUI (Intra-uterine insemination) specifically targets the introduction of semen into the uterus to:

A Bypassing the vagina in cases of male inability to inseminate

B Transfer a zygote directly to the uterus

C Form an embryo in the laboratory

D Collect ova from a donor

💡 Short Explanation

IUI places sperm directly at the "start" of the upper reproductive tract. This compensates for vaginal/cervical issues or low sperm counts.

✅ Correct Answer Explanation

The correct answer is ( A). By placing sperm directly into the uterus, IUI minimizes the distance the sperm must travel and avoids any hostile environment (e.g., acidic pH in the vagin A) that might kill or slow down a low count of sperm. It is a direct "shortcut" to the fertilization site.

❓ Why Other Options Are Incorrect

Option B → Transferring a zygote/embryo is ZIFT or IUT, not IUI.
Option C → IUI does not involve laboratory embryo creation.
Option D → IUI does not collect ova.

🎯 Strategy

Used: Substitution

Application: Define IUI by its function (Bypassing the cervix/vagin

Final Logic: IUI = Uterus = Direct delivery.

🧠 Memory Trick

"IUI = Bypass the Vagina."

📚 Class XII – Biology – Chapter: Reproductive Health – Topic: IUI –

📄 Passage

In vitro fertilisation (IVF)... followed by embryo transfer (ET) is one of such methods. In this method... the zygote or early embryos (with upto 8 blastomeres) could then be transferred into the fallopian tube (ZIFT)... and embryos with more than 8 blastomeres, into the uterus (IUT)...

According to the passage, what is the primary difference between ZIFT and IUT?

A ZIFT uses donor ova while IUT uses wife's ova

B ZIFT involves the fallopian tube while IUT involves the uterus

C ZIFT is for females who cannot produce ova while IUT is for males

D ZIFT is in-vivo while IUT is in-vitro

💡 Short Explanation

ZIFT: Zygote Intra-Fallopian Transfer. IUT: Intra-Uterine Transfer. The names indicate the anatomical destination.

✅ Correct Answer Explanation

The correct answer is ( B). As the names imply, ZIFT (Zygote Intra-Fallopian Transfer) transfers the zygote or early embryo into the fallopian tube, while IUT (Intra-Uterine Transfer) places the more developed embryo directly into the uterus.

❓ Why Other Options Are Incorrect

Options A, C, D → These are either factually incorrect or misinterpret the definitions given in the passage.

🎯 Strategy

Used: Contextual/Tonal Matching

Application: Parse the definitions of the acronyms from the text.

Final Logic: ZIFT = Fallopian Tube; IUT = Uterus.

🧠 Memory Trick

"F for Fallopian, U for Uterus."

📚 Class XII – Biology – Chapter: Reproductive Health – Topic: ZIFT and IUT –

📄 Passage

What determines whether an embryo is suitable for ZIFT according to the passage?

A It must have more than 8 blastomeres

B It must be a zygote or have up to 8 blastomeres

C It must be formed within the female's body

D It must be collected from a donor female

💡 Short Explanation

The passage explicitly defines ZIFT candidates as zygotes or early embryos with up to 8 cells. Embryos with more than 8 are reserved for IUT.

✅ Correct Answer Explanation

The correct answer is (B). The passage provides a clear developmental cutoff: "zygote or early embryos (with up to 8 blastomeres) could then be transferred into the fallopian tube (ZIFT)." This is the strict criteria for ZIFT classification.

❓ Why Other Options Are Incorrect

Option A → Embryos with >8 blastomeres go to the uterus (IUT).
Option C → IVF embryos are formed in the lab, not the body, for these procedures.
Option D → Donor status is not the criterion for the transfer site.

🎯 Strategy

Used: Substitution

Application: Verify the developmental threshold mentioned in the text.

Final Logic: ZIFT limit = 8 blastomeres.

🧠 Memory Trick

"ZIFT = Up to 8; IUT = >8."

📚 Class XII – Biology – Chapter: Reproductive Health – Topic: ZIFT –

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