Question

1. which of the following is not one of the four major classes of organic biomolecules mentioned in the text?

a. minerals
b. carbohydrates
c. proteins
d. nucleic acids

1. what type of bond links amino acids together to form polypeptide chains?

a. peptide bonds
b. hydrogen bonds
c. ionic bonds
d. phosphodiester bonds

1. according to the text, what is the primary role of nucleic acids?

a. storing and transmitting genetic information.
b. providing structural support to cells.
c. catalyzing biological reactions.
d. serving as the primary energy source for organisms.

Explanation:

• For question 9, the four major classes of organic biomolecules are carbohydrates, proteins, nucleic acids, and lipids. Minerals are not among them.
• For question 10, peptide bonds link amino - acids to form polypeptide chains.
• For question 11, the primary role of nucleic acids is storing and transmitting genetic information.

Answer:

1. A. Minerals
2. A. Peptide bonds
3. A. Storing and transmitting genetic information.