Consider the following statements: (i) Particular messenger RNA (mRNA) molecules, which are smaller than their average size, are called microRNA (miRNA). (ii) miRNA are small, single-stranded, non-co…

Question

Consider the following statements: (i) Particular messenger RNA (mRNA) molecules, which are smaller than their average size, are called microRNA (miRNA). (ii) miRNA are small, single-stranded, non-coding RNA molecules. (iii) miRNA molecules play a crucial role in gene regulation. (iv) People knew about miRNA since the early 1980s. Which of the above statements are correct?

PYQPulse · Accepted Answer

(ii) and (iii) only

PYQPulse · Answer

Explanation: miRNAs are distinct small non-coding RNAs (not smaller mRNAs), discovered in 1993; they are single-stranded non-coding RNAs involved in gene regulation, so (ii) and (iii) are correct; official key gives (B).

Answer: B. (ii) and (iii) only

Explanation

Answer: B. (ii) and (iii) only

Explanation