Question

Identify the correct statements among the following: 

A. RNA interference (RNAi) takes place in all eukaryotic organisms as a method of cellular defense. 
B. Bt-toxin gene, CryIIAb controls cotton bollworms. 
C. Mycorrhiza helps the plants for more absorption of potassium. 
D. Elusion is a technique of extracting separated bands of DNA from agarose gel.

• A. A, B, C
• B. B, C, D
• C. A, C, D
• D. A, B, D

Hint:

RNA interference (RNAi) is a vital process in cellular defense, while mycorrhizal fungi are mainly associated with nutrient uptake, especially phosphorus.

Answer 1

The Correct Option is D

Let's evaluate the statements:
- A) RNA interference (RNAi) takes place in all eukaryotic organisms as a method of cellular defense: This is true. RNAi is a regulatory mechanism in eukaryotic cells that helps defend against viral RNA and transposons by degrading specific mRNA sequences.
- B) Bt-toxin gene, CryIIAb controls cotton bollworms: This is true. The Bt (Bacillus thuringiensis) toxin gene, specifically CryIIAb, is engineered into cotton plants to protect them from bollworms. This toxin disrupts the digestive system of the pest.
- C) Mycorrhiza helps the plants for more absorption of potassium: This is false. Mycorrhizal fungi primarily help plants absorb water and phosphorus, not potassium. They form a symbiotic relationship with plant roots, extending the root system and enhancing nutrient uptake.
- D) Elusion is a technique of extracting separated bands of DNA from agarose gel: This is true. Elution is a process used to extract DNA fragments from agarose gel after gel electrophoresis. The bands are cut from the gel and the DNA is then extracted using a buffer. Thus, the correct answer is A, B, D.