Question

The passage suggests that a biologist who held the view described in the first sentence of the second paragraph would most probably also have believed which of the following?

• A. The rate of degradation of specific mRNA’s has little effect on protein concentrations.
• B. The rate of degradation of specific mRNA’s should be studied intensively.
• C. The rates of synthesis and degradation for any given mRNA are normally equal.
• D. Different mRNA’s undergo degradation at widely varying rates.
• E. Most mRNA’s degrade very rapidly.

Answer 1

The correct option is A The rate of degradation of specific mRNA’s has little effect on protein concentrations.

The sentence mentioned is ‘Biologists once assumed that the variable rates at which cells synthesize different mRNA’s determine the quantities of mRNA’s and their corresponding proteins in a cell.’ So its saying if you want to increase level of mRNA the cell should degrade it slowly. If degradation is slow then more mRNA will accumulate and hence more protein will develop. So option (a) is answer.