Question

Which of these options are not a function of Ribosomes?

(i) It helps in the manufacture of protein molecules.

(ii) It helps in the manufacture of enzymes.

(iii) It helps in the manufacture of hormones.

(iv) It helps in the manufacture of starch molecules.

• A. (i) and (ii)
• B. (ii) and (iii)
• C. (iii) and (iv)
• D. (iv) and (i)

Answer 1

The correct option is C

(iii) and (iv)

The correct option is C.

Explanation of correct option:

Statement (iii):

1. A complex molecular machine found within the living cells, which generates proteins from amino acids at the time of translation or protein synthesis is a ribosome.
2. Hormones are not manufactured by ribosomes, they are produced by the endocrine glands, which are the ductless glands, which pour their secretions, that is, hormones directly into the bloodstream.
3. The prime endocrine glands are pineal, thymus, pituitary, adrenal, pancreas, and thyroid glands.

Statement (iv):

1. Starch refers to a long-chain polymer of the molecules of glucose, which are joined together.
2. It is a natural polymer generally produced as a food source during the process of photosynthesis.
3. The process in which sunlight, water, and carbon dioxide are used to produce chemical energy is photosynthesis.
4. Ribosomes do not produce molecules of starch.

Explanation of incorrect options:

Statement (i):

1. Ribosomes are primarily involved in the synthesis of protein, as these are the locations of protein synthesis.
2. It also produces amino acids, which further polymerize to produce proteins.

Statement (ii):

1. Enzymes are proteins, which accelerate the rate of chemical reactions within the body.
2. As enzymes are proteins, thus, it can be said that ribosomes also produce enzymes.

Final answer: The correct statements are (iii) and (iv).