Question 1

Which of the following elements is NOT considered one of the four most abundant elements in living systems?

Accepted Answer

Phosphorus (P)

Question 2

A deficiency in which element can lead to goiter, a thyroid disease?

Accepted Answer

Iodine (I)

Question 3

Which of the following is the correct monomer and linkage for proteins?

Accepted Answer

Amino acid; Peptide (amide) bond

Question 4

Which class of biological macromolecules is NOT polymeric but exists in large complexes?

Accepted Answer

Lipids

Question 5

Which of the following best describes the linkage found in nucleic acids?

Accepted Answer

Phosphodiester bond

Question 6

Which of the following ions is essential for life and plays a key role in nerve impulse transmission?

Accepted Answer

K$$^{+}$$

Question 7

Which macromolecule is primarily responsible for storing genetic information?

Accepted Answer

Nucleic acids

Question 8

Which of the following is a correct example of a biological polymer and its monomer?

Accepted Answer

Nucleic acid – Nucleotide

Question 9

Which of the following disciplines is NOT directly listed as a field that contributes to biochemistry?

Accepted Answer

Physics

Question 10

Which of the following statements about biological macromolecules is TRUE?

Accepted Answer

Proteins are polymers made of amino acids linked by peptide bonds.

Question 11

Which of the following is the correct order of abundance for the major elements in living systems?

Accepted Answer

C, H, O, N

Question 12

Which of the following is a function of lipids in biological systems?

Accepted Answer

Forming cellular membranes

Question 13

Which of the following macromolecules is assembled from 20 different types of monomers?

Accepted Answer

Proteins

Question 14

Which of the following linkages is found in polysaccharides?

Accepted Answer

Glycosidic (ether) bond

Question 15

Which of the following statements about the structure of DNA is correct?

Accepted Answer

DNA is a polymer of nucleotides linked by phosphodiester bonds.

Question 16

Which of the following is NOT a major class of biological macromolecules?

Accepted Answer

Vitamins

Question 17

Which of the following best explains why lipids are not considered polymers?

Accepted Answer

Lipids are made of fatty acids joined by ester bonds but do not form long chains of repeating units.

Question 18

Which of the following is a correct pairing of macromolecule and its function?

Accepted Answer

Polysaccharides – Provide energy storage

Question 19

Which of the following elements is classified as a second-tier element in biochemistry and is essential for oxygen transport in blood?

Accepted Answer

Iron (Fe)

Question 20

Which of the following statements about the relationship between biochemistry and other scientific disciplines is correct?

Accepted Answer

Biochemistry integrates concepts from organic chemistry, genetics, cell biology, and other related fields.

Introduction to Biochemistry: Elements, Macromolecules, and Their Biological Roles

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