CUET UG Biology Booster Test 3-Agricultural Applications
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QUESTION 1 OF 20
Arrange the alternatives for increasing food production as they evolved and are sequentially presented in the text to overcome prior limitations:
QUESTION 2 OF 20
An agricultural scientist is looking for a long-term to obtain maximum yield while minimising the use of fertilisers and chemicals to reduce harmful environmental effects. Based on the text, which of the following is proposed as a direct scientific solution?
QUESTION 3 OF 20
Which of the following was NOT a contributing factor to the success of the Green Revolution in tripling the food supply?
QUESTION 4 OF 20
Analysing the text, why did the development of tissue culture essentially become a scientific necessity in the 1950s?
QUESTION 5 OF 20
Match the required component of a tissue culture nutrient medium to its functional category:
| Column I | Column II |
|---|---|
| 1. Sucrose | a. Growth regulators (Auxins/Cytokinins) |
| 2. Auxins/Cytokinins | b. Carbon source |
| 3. Inorganic salts | c. Nutrients (micro/macro) |
| 4. Plasma membrane | d. Protoplast boundary |
QUESTION 6 OF 20
Consider the following statements regarding cellular capacity:
I. Totipotency is the unique capacity to generate a whole plant from any single cell or explant.
II. Achieving totipotency strictly requires non-sterile conditions to allow natural bacterial growth regulators to act.
QUESTION 7 OF 20
Which of the following is NOT an analytical characteristic of micro-propagation?
QUESTION 8 OF 20
Which statement is INCORRECT regarding the nature of somaclones?
QUESTION 9 OF 20
QUESTION 10 OF 20
QUESTION 11 OF 20
Arrange the analytical sequence required to produce a somatic hybrid like a pomato:
1. Isolate cells.
2. Grow hybrid plant.
3. Enzymatic digestion (get naked protoplasts).
4. Fuse protoplasts.
QUESTION 12 OF 20
The ultimate failure of the Pomato for widespread commercial use was scientifically attributed to:
QUESTION 13 OF 20
Read the following statements analysing the impact of GM plants:
I. Genetic modification of plants has successfully reduced reliance on chemical pesticides.
II. Genetic modification has inadvertently decreased the efficiency of mineral usage by plants.
QUESTION 14 OF 20
Match the specific biotechnological application to its corresponding practical result:
| Column I | Column II |
|---|---|
| 1. Meristem culture | a. Virus-free sugarcane |
| 2. Micro-propagation | b. Somaclones of apple |
| 3. Somatic hybridisation | c. Pomato |
| 4. Genetic modification | d. Cold/Drought tolerance |
QUESTION 15 OF 20
A genetically modified crop engineered for increased efficiency of mineral usage would NOT logically result in:
QUESTION 16 OF 20
If a genetically modified crop is engineered to have a delayed ripening process and a longer shelf life, this directly addresses which agricultural goal mentioned in the text?
QUESTION 17 OF 20
Golden Rice represents a paradigm shift in GMO application because it is primarily engineered to:
QUESTION 18 OF 20
By engineering a crop like Vitamin A enriched rice, biotechnology analytically moves beyond yield protection (like pest resistance) and directly addresses:
QUESTION 19 OF 20
The development of "tailor-made plants" indicates an analytical shift in the purpose of agriculture towards:
QUESTION 20 OF 20
Which of the following best exemplifies a non-food, industrial application of genetically modified plants as outlined in the text?
Test Complete!
Answer Review
1 Arrange the alternatives for increasing food production as they evolved and are sequentially presented in the text to overcome prior limitations:
Agro-chemical based agriculture (2) came first as the basis of the Green Revolution. Organic agriculture (3) is an alternative/parallel approach. Genetically engineered crop-based agriculture (1) is the latest development.
The text outlines an evolutionary progression in agricultural . Agro-chemical based agriculture was the initial solution for food supply. Following the realization of its limitations, organic agriculture emerged as an alternative, and subsequently, GM-crop technology (genetically engineere D) was developed to solve deeper issues like abiotic stress and nutritional deficits. Thus, the order is 2, 3, 1.
- Option B → Genetic engineering (1) is not the first, and agrochemicals (2) are not the second in this specific evolution.
- Option C → Organic agriculture (3) did not predate the Green Revolution (2).
- Option D → GM technology (1) followed organic alternatives (3) in the text's narrative.
Used: Contextual/Tonal Matching
Application: Mapping the text's historical/technological progression from older to newer methods.
Final Logic: Chemical (Green Rev) -> Organic -> Genetically Engineered.
"C-O-G": Chemical, Organic, Genetic.
2 An agricultural scientist is looking for a long-term to obtain maximum yield while minimising the use of fertilisers and chemicals to reduce harmful environmental effects. Based on the text, which of the following is proposed as a direct scientific solution?
GM crops are engineered to be pest-resistant, reducing chemical need. They also improve mineral efficiency, reducing fertilizer need. This aligns with the goal of high yield with lower chemical impact.
Biotechnology offers GM crops as a solution to sustainability. Unlike conventional breeding (which is slow) or agrochemicals (which cause environmental harm), GM technology allows for targeted improvements, such as pest resistance and nutrient-use efficiency, effectively maintaining yield while reducing chemical footprints.
- Option A → Conventional breeding is not a "direct scientific solution" to the efficiency limitations of modern agro-chemical farming.
- Option C → Increasing chemicals directly contradicts the goal of minimizing environmental impact.
- Option D → Pomato was a failed hybrid, not a long-term agricultural yield .
Used: Elimination
Application: Eliminating options that either increase chemical use or represent failed/outdated methods.
Final Logic: GM technology is the specifically cited biotech solution for sustainability.
"GM = Sustainable Yield."
3 Which of the following was NOT a contributing factor to the success of the Green Revolution in tripling the food supply?
Green Revolution focused on food security (staples). Tailor-made plants are a later development in biotechnology. They were not part of the Green Revolution (1960s-70s).
The Green Revolution (1960s) succeeded through three factors: improved high-yielding varieties, better irrigation/management, and chemical inputs. "Tailor-made plants" for industrial fuel are a modern biotechnological application, not a contributor to the original Green Revolution.
- Option A → Improved varieties were a key pillar.
- Option B → Better management was a key pillar.
- Option D → Fertilizer/pesticide use was a key pillar.
Used: Odd One Out
Application: Filtering for the item that belongs to a different (later) era of technology.
Final Logic: Tailor-made plants are modern biotech, not Green Revolution history.
"GR = Food, not Fuel."
4 Analysing the text, why did the development of tissue culture essentially become a scientific necessity in the 1950s?
Population demand grew too quickly. Conventional breeding takes years for new variety development. Tissue culture allows rapid, high-volume production.
Tissue culture was adopted because conventional breeding could not meet the speed required for large-scale agricultural demand. Tissue culture provided a method to propagate thousands of genetically identical plants in a very short duration, solving the speed limitation of older techniques.
- Option A → Extinction was never the driver; demand/speed was.
- Option B → Agrochemicals were actually very effective (which is why they were used).
- Option D → The Pomato was a research experiment, not the catalyst for tissue culture.
Used: Contextual/Tonal Matching
Application: Identifying the need for speed and scalability as the primary motivator for tissue culture.
Final Logic: Tissue culture = Speed and Scalability.
"TC = Fast production."
5 Match the required component of a tissue culture nutrient medium to its functional category:
| Column I | Column II |
|---|---|
| 1. Sucrose | a. Growth regulators (Auxins/Cytokinins) |
| 2. Auxins/Cytokinins | b. Carbon source |
| 3. Inorganic salts | c. Nutrients (micro/macro) |
| 4. Plasma membrane | d. Protoplast boundary |
Sucrose = Carbon source. Auxins/Cytokinins = Growth regulators. Inorganic salts = Nutrients (micro/macro). Plasma membrane = Protoplast boundary.
In tissue culture media: (1 B) Sucrose is the energy-providing carbon source; (2- A) Auxins and cytokinins regulate cellular growth and differentiation; (3- C) Inorganic salts/vitamins provide the minerals and nutrients essential for metabolism; (4- D) The plasma membrane is the natural boundary defining the protoplast once the wall is removed.
- Options B, C, D → These misidentify the biological role of the listed substances.
Used: Option Grouping
Application: Pairing components with their standard laboratory roles.
Final Logic: Mapping chemical inputs (Carbon, Regulators, Salts) to functional categories.
"Sucrose = Carbon."
6 Consider the following statements regarding cellular capacity:
I. Totipotency is the unique capacity to generate a whole plant from any single cell or explant.
II. Achieving totipotency strictly requires non-sterile conditions to allow natural bacterial growth regulators to act.
I is the standard definition of totipotency. II is false; tissue culture strictly requires sterile conditions to prevent contamination.
Statement I accurately defines totipotency as the potential to form a complete plant. Statement II is incorrect because tissue culture (and thus the expression of totipotency) requires strictly sterile conditions; non-sterile conditions would lead to the growth of microbes, which would destroy the explant.
- Option B, C, D → These misidentify the requirement for sterilization in biotechnology.
Used: Elimination
Application: Eliminating the statement that suggests "non-sterile" conditions (which is biologically fatal in tissue culture).
Final Logic: Totipotency = Sterile environment.
"Totipotency needs Sterile conditions."
7 Which of the following is NOT an analytical characteristic of micro-propagation?
Micro-propagation results in clones (identical). Clones lack diversity. Mutation is not the intended goal.
Micro-propagation is designed to produce thousands of "somaclones"—genetically identical plants. Introducing genetic diversity or mutations is the opposite of the process's intent, which is to preserve the exact genetic makeup of the superior parent plant.
- Option A → Large-scale production is a primary characteristic.
- Option B → Short duration (rapidity) is a key advantage.
- Option D → Commercially used for banana/apple as per NCERT.
Used: Extreme Word Filter
Application: Filtering for "genetic diversity" which contradicts the term "clone."
Final Logic: Micro-propagation = Clones = No diversity.
"Clone = No change."
8 Which statement is INCORRECT regarding the nature of somaclones?
The description in C defines "Somatic Hybridisation." Somaclones are produced by simple tissue culture (mitosis), not fusion. Therefore, C is incorrect.
Somaclones are identical copies produced via tissue culture. Option C describes "somatic hybridization" (the Pomato technique), which involves protoplast fusion to create hybrids. This is fundamentally different from the clonal production of somaclones.
- Options A, B, D → All are correct facts about somaclones/micro-propagation as per the textbook.
Used: Substitution
Application: Substituting the definition of the process described in C to find the mismatch.
Final Logic: Fusion = Hybrid; Clones = Identical copies.
"Fusion = Hybrid, Clonal = Identical."
9
Viruses use vascular transport (phloem). Meristem lacks vascular tissue. This protects the meristem from infection.
Meristems are characterized by rapidly dividing cells and an absence of vascular tissue connection to the rest of the plant. This prevents the transport and colonization of viral pathogens, making the meristem a "virus-free" zone even when the parent plant is sick.
- Option A → All plant cells (in theory) can exhibit totipotency.
- Option C → All plant tissue cultures require a carbon source.
- Option D → Meristems are not pesticide-producing organs.
Used: Substitution
Application: Matching the anatomical characteristic (lack of vascular tissue) to the clinical outcome (virus-free).
Final Logic: No vascular transport = No virus.
"No Pipes = No Virus."
10
NCERT explicitly names "apical and axillary meristems." These are the standard regions used in culture for virus recovery.
The NCERT text explicitly states: "Even if the plant is infected with a virus, the meristem (apical and axillary) is free of virus."
- Options A, B, D → These are meristematic tissues, but not the specific ones cited for this procedure.
Used: Contextual/Tonal Matching
Application: Identifying the correct terminology from the textbook snippet.
Final Logic: Textbook specifies apical and axillary.
"A-A" (Apical-Axillary).
11 Arrange the analytical sequence required to produce a somatic hybrid like a pomato:
1. Isolate cells.
2. Grow hybrid plant.
3. Enzymatic digestion (get naked protoplasts).
4. Fuse protoplasts.
Isolate cells. Enzymatic digestion (get naked protoplasts). Fuse protoplasts. Grow hybrid plant.
The correct analytical progression for somatic hybridisation is: (1) Isolate cells from the donor plants, (3) Digest cell walls with enzymes to isolate naked protoplasts, (4) Fuse the protoplasts to create a hybrid, and (2) Cultivate the resulting hybrid protoplast into a new plant.
- Options B, C, D → These misorder the steps (e.g., trying to fuse cells before isolating them, or trying to grow the plant before fusion occurs).
Used: Elimination
Application: Logic dictates that you must isolate the protoplasts before you can fuse them.
Final Logic: Isolate -> Digest -> Fuse -> Grow.
"I-D-F-G" (Isolate, Digest, Fuse, Grow).
12 The ultimate failure of the Pomato for widespread commercial use was scientifically attributed to:
Pomato experiment was a partial success (fusion workeD). Commercial viability failed because it didn't combine the "best of both worlds" (e.g., poor tuber/fruit quality).
While somatic hybridisation proved it was technically possible to fuse the protoplasts of tomato and potato, the resulting "Pomato" did not combine the economically desirable traits of both parents. This absence of commercial utility is the reason it is not used in farming today.
- Option A → The fusion was successful.
- Option B → The hybrid protoplast did grow into a plant.
- Option D → Viral susceptibility was not the stated reason for commercial failure in the text.
Used: Substitution
Application: Substituting the "failure" description with the specific commercial reason stated in the text.
Final Logic: Fusion success does not equal commercial utility.
"Pomato = Technical Success, Commercial Flop."
13 Read the following statements analysing the impact of GM plants:
I. Genetic modification of plants has successfully reduced reliance on chemical pesticides.
II. Genetic modification has inadvertently decreased the efficiency of mineral usage by plants.
I is true: Bt crops reduce chemical pesticide use. II is false: GM technology actually increases mineral usage efficiency.
Statement I is true; a major benefit of GM crops is the reduction in pesticide reliance. Statement II is false; GM technology is specifically used to increase (not decrease) the efficiency of mineral usage to prevent soil fertility depletion.
- Option B, C, D → These are incorrect because Statement II directly contradicts the goal of biotech mineral enhancement.
Used: Substitution
Application: Identifying the false claim about mineral usage efficiency.
Final Logic: Biotech aims for increased efficiency, not decreased.
"GM = High Efficiency, Low Pesticides."
14 Match the specific biotechnological application to its corresponding practical result:
| Column I | Column II |
|---|---|
| 1. Meristem culture | a. Virus-free sugarcane |
| 2. Micro-propagation | b. Somaclones of apple |
| 3. Somatic hybridisation | c. Pomato |
| 4. Genetic modification | d. Cold/Drought tolerance |
Meristem culture (1) -> Virus-free sugarcane (A). Micro-propagation (2) -> Somaclones of apple (B). Somatic hybridisation (3) -> Pomato (C). Genetic modification (4) -> Cold/Drought tolerance (D).
Matching based on text examples: (1 A) Meristem culture creates virus-free sugarcane; (2- B) Micro-propagation creates clones (somaclones) of apple; (3- C) Somatic hybridisation yielded the experimental Pomato; (4- D) Genetic modification engineered crops to survive abiotic stress (cold/drought).
- Options B, C, D → Misalign these specific biotech methods with their textbook examples.
Used: Option Grouping
Application: Pairing method to outcome.
Final Logic: Methodologies are matched to their specific textbook-cited examples.
"Meristem-Sugarcane, Micro-Apple, Hybrid-Pomato, GM-Abiotic."
15 A genetically modified crop engineered for increased efficiency of mineral usage would NOT logically result in:
"Increased efficiency" = Slowing depletion. Option C states the opposite ("rapid depletion"). Therefore, C is the logically inconsistent outcome.
Genetic modification for mineral usage efficiency ensures that plants extract only what they need effectively. This process preserves the soil's longevity, which means it helps prevent rapid mineral depletion. Thus, Option C is not a result of this technology.
- Options A, B, D → These are all logical, intended outcomes of improving mineral usage efficiency.
Used: Elimination
Application: Eliminating the outcome that is synonymous with "inefficiency."
Final Logic: High efficiency = Sustained soil fertility.
"Efficiency = Save soil, not drain it."
16 If a genetically modified crop is engineered to have a delayed ripening process and a longer shelf life, this directly addresses which agricultural goal mentioned in the text?
Delayed ripening = Longer shelf life = Less rotting. This is the definition of reducing post-harvest losses.
Post-harvest losses include food spoilage that occurs after harvesting. By engineering crops with delayed ripening, the shelf life is extended, which directly prevents spoilage and fulfills the goal of reducing post-harvest losses.
- Options A, C, D → These address different stages or goals of agriculture (field growth, pesticide management, or laboratory hybridization).
Used: Substitution
Application: Matching the biotech trait (delayed ripening) to the industrial goal (loss reduction).
Final Logic: Longer life = Fewer losses.
"Delayed ripen = Longer life = Less loss."
17 Golden Rice represents a paradigm shift in GMO application because it is primarily engineered to:
Golden Rice is "nutritionally enriched." It adds Vitamin A to the consumer's diet. This shifts the focus from just "farming yield" to "consumer nutrition."
While many GMOs focus on yield protection (pest resistance, drought tolerance), Golden Rice represents a shift toward "nutritional improvement" by enhancing the food itself to provide essential vitamins (like Vitamin A) to human consumers.
- Options A, C, D → These describe different categories of GM applications (Industrial, Abiotic, Post-harvest storage).
Used: Elimination
Application: Filtering for the "nutritional" goal.
Final Logic: Golden Rice = Nutrition enhancement.
"Golden = Nutritious."
18 By engineering a crop like Vitamin A enriched rice, biotechnology analytically moves beyond yield protection (like pest resistance) and directly addresses:
Vitamin A deficiency is a health issue. Golden Rice solves the health issue via food. This directly addresses human nutrition.
Biotech applications like Golden Rice are designed to address specific "hidden hunger" issues, namely micronutrient malnutrition. This moves agriculture into the realm of public health by creating crops that deliver essential nutrients to the population.
- Options A, B, D → These are unrelated to the nutritional enrichment purpose of Golden Rice.
Used: Contextual/Tonal Matching
Application: Matching the crop enrichment to the health outcome.
Final Logic: Enriched food = Healthier humans.
"Enriched Food = Better Nutrition."
19 The development of "tailor-made plants" indicates an analytical shift in the purpose of agriculture towards:
Tailor-made = Industrial utility. They act as "bioreactors" for non-food products.
"Tailor-made plants" marks a shift where agricultural crops are used not just as food sources, but as biological manufacturing hubs ("bioreactors") to supply industries with chemicals, starches, fuels, and medicines.
- Options A, C, D → These options describe past methods, regression, or flawed interpretations of agricultural progress.
Used: Contextual/Tonal Matching
Application: Selecting the answer that defines "tailor-made" as industrial output.
Final Logic: Tailor-made = Industrial bioreactors.
"Tailor-made = Industrial Maker."
20 Which of the following best exemplifies a non-food, industrial application of genetically modified plants as outlined in the text?
Golden Rice is for food (nutrition). Somaclones are for planting. Pomato was for hybridization. Fuels are for industrial use (non-food).
The application of GM plants to produce alternative fuels is the quintessential non-food, industrial use case mentioned in the NCERT text under the topic of "tailor-made plants."
- Option A → Golden Rice is for human food/nutrition.
- Option C → Somaclones are for agricultural cultivation.
- Option D → The Pomato was an experimental food hybrid.
Used: Elimination
Application: Removing food/agri-focused options to find the industrial one.
Final Logic: Industry = Fuel.
"Non-food = Fuel."
