Question 1

Which of the following elements is the most abundant in living systems (excluding water) and forms the backbone of most biomolecules?

Accepted Answer

Carbon

Question 2

Which of the following best describes a hydrocarbon?

Accepted Answer

A molecule containing only carbon and hydrogen

Question 3

Which functional group is NOT present in the following molecule?

$$\mathrm{CH_3CH_2COOH}$$

Accepted Answer

Amino

Question 4

Which of the following is NOT a primary class of biomolecule?

Accepted Answer

Minerals

Question 5

Which type of reaction forms covalent bonds between monomers to create polymers?

Accepted Answer

Dehydration synthesis

Question 6

Which chemical formula represents a typical simple carbohydrate (monosaccharide)?

Accepted Answer

$$\mathrm{C_6H_{12}O_6$}$$

Question 7

Which type of bond links monosaccharides together in polysaccharides?

Accepted Answer

Glycosidic bond

Question 8

Animal cells store energy in the form of _____, while plant cells store energy in the form of _____.

Accepted Answer

Glycogen; starch

Question 9

Which functional groups are always found in amino acids?

Accepted Answer

Amino and carboxyl groups

Question 10

What is the covalent bond called that links adjacent amino acids in a protein?

Accepted Answer

Peptide bond

Question 11

Which level of protein structure is determined by the sequence of amino acids?

Accepted Answer

Primary structure

Question 12

Which of the following is a function of a chaperone protein?

Accepted Answer

Assist in protein folding or re-naturing

Question 13

Which of the following best describes a nucleotide?

Accepted Answer

A nitrogenous base, a phosphate group, and a sugar

Question 14

Which of the following statements about DNA structure is true?

Accepted Answer

The nucleic acid strands in a DNA molecule are oriented antiparallel to each other.

Question 15

Which type of fatty acid only contains carbon-carbon single bonds?

Accepted Answer

Saturated

Question 16

A triglyceride is a lipid with _____ fatty acid chains covalently linked to a single _____ molecule.

Accepted Answer

3; glycerol

Question 17

How do phospholipids interact with water molecules?

Accepted Answer

The polar heads attract water; the nonpolar tails avoid water.

Question 18

Which of the following is a function of cholesterol in animal cell membranes?

Accepted Answer

It stabilizes membrane structure and reduces water loss.

Question 19

Which of the following statements about the difference between DNA and RNA is correct?

Accepted Answer

The sugar group in DNA is deoxyribose, while the sugar group in RNA is ribose.

Question 20

Which of the following nitrogenous bases are purines?

Accepted Answer

Adenine and guanine

Kary

Study Guide - Practice Questions