The Question is from neet-botany biotechnology , and it was created by the author Mr. NARESH KUMAR K

Question

A scientist is attempting to develop a transgenic crop resistant to a specific lepidopteran pest. Which gene would be the LEAST suitable candidate for transfer?

Mr. NARESH KUMAR K · Accepted Answer

## CORE INFORMATION
✓ **Answer**: C. A gene involved in photosynthesis
## CONCEPT FRAMEWORK
	**Primary Concept**: Genetic Engineering and Pest Resistance in Crops
	**Related Topics**: Transgenic organisms, Bt toxin, Plant Physiology, Insect Physiology
	**Prerequisites**: Basic understanding of gene function and genetic modification.
## SOLUTION PATHWAY
**Given Information**:
	Goal: Develop pest-resistant crop.
	Target Pest: Lepidopteran (e.g., moths, butterflies).
**Method & Steps**:
	1. Analyze gene function and its relevance to pest resistance.
	Reasoning: The transferred gene should negatively impact the target pest's survival or ability to damage the crop.
	2. Evaluate each option based on its potential effect on the lepidopteran pest.
	Working: Consider how each gene product might interact with the pest.
	Key Point:  Photosynthesis is essential for plant growth, but it doesn't directly affect insect pests.
	3. Identify the gene with the least impact on the pest.
	Result: A gene involved in photosynthesis.
	Verification:  Photosynthesis primarily benefits the plant, not harms the insect.
## OPTION ANALYSIS
[A] A gene encoding a Bt toxin :x:
Bt toxins are known to be effective against lepidopteran pests. They disrupt the insect's digestive system, leading to its death. This makes it a suitable candidate, not the least suitable.
[B] A gene conferring resistance to a bacterial pathogen :x:
While not directly targeting the lepidopteran pest, this gene could indirectly enhance the crop's overall health and resilience, potentially making it less susceptible to pest damage.  Therefore, not the least suitable.
[C] A gene involved in photosynthesis ✓:
Photosynthesis is crucial for plant growth and development, but it doesn't directly affect insect pests.  Transferring a photosynthesis gene wouldn't confer any resistance. This makes it the LEAST suitable candidate.
[D] A gene encoding a protein that disrupts insect gut function :x:
This gene directly targets the insect's digestive system, similar to Bt toxins. This makes it a suitable candidate for pest resistance, not the least suitable.
## LEARNING AIDS
	**Common Mistakes**:
		1. Focusing solely on plant benefit and not considering the impact on the pest: Remember, the goal is pest resistance, so the gene must negatively affect the pest.
		2. Confusing bacterial resistance with insect resistance: Genes conferring resistance to bacteria won't necessarily protect against insects.
	**Quick Tips**:
		1. Consider the target organism and the mechanism of action of the gene product.
		2.  Think about how the gene product would interact with the pest to disrupt its life cycle or feeding behavior.

Mr. NARESH KUMAR K · Answer

A gene encoding a Bt toxin

Mr. NARESH KUMAR K · Answer

A gene conferring resistance to a bacterial pathogen

Mr. NARESH KUMAR K · Answer

The correct Option is "A gene involved in photosynthesis"

Mr. NARESH KUMAR K · Answer

A gene encoding a protein that disrupts insect gut function

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