Question 1

Which of the following best describes the difference between organic and inorganic compounds in biochemistry?

Accepted Answer

Organic compounds contain carbon and hydrogen, while inorganic compounds generally lack carbon.

Question 2

A solution has a pH of 4. What is the concentration of hydrogen ions $$[H^+] in $$moles per liter?

Accepted Answer

$$[H^+] = 1 	imes 10$$^{-4}$$

Question 3

Which of the following is a polysaccharide?

Accepted Answer

Starch

Question 4

Which of the following best explains why a water strider can walk on water?

Accepted Answer

Hydrogen bonding increases the surface tension of water.

Question 5

Which of the following is NOT a lipid?

Accepted Answer

Starch

Question 6

What is the building block of proteins?

Accepted Answer

Amino acid

Question 7

Which of the following is a correct pairing of DNA bases?

Accepted Answer

Adenine and Thymine

Question 8

Which of the following reactions is an example of a catabolic, exergonic reaction?

Accepted Answer

Breaking down a protein into amino acids

Question 9

Which of the following is NOT a nucleic acid?

Accepted Answer

All of the above are nucleic acids

Question 10

A buffer system in the blood helps maintain pH homeostasis. If a strong acid is added to the blood, what will the buffer do?

Accepted Answer

Absorb excess hydrogen ions to minimize pH change

Question 11

Which of the following best describes the structure of a triglyceride?

Accepted Answer

One glycerol and three fatty acids

Question 12

Which of the following is a function of proteins in the body?

Accepted Answer

Catalyzing chemical reactions

Question 13

Which of the following best describes ATP?

Accepted Answer

A nucleotide that stores energy in its phosphate bonds

Question 14

Which of the following is a disaccharide?

Accepted Answer

Lactose

Question 15

Which of the following best explains why enzymes are essential for life?

Accepted Answer

They increase the rate of chemical reactions without being consumed.

Question 16

Which of the following is true about the pH scale?

Accepted Answer

A solution with pH 3 has a higher concentration of hydrogen ions than a solution with pH 7.

Question 17

Which of the following is the correct match of building block to macromolecule?

Accepted Answer

Nucleotides – nucleic acids

Question 18

Which of the following best describes a neutralization reaction?

Accepted Answer

An acid reacts with a base to form water and a salt.

Question 19

Which of the following is a property of water that is critical for life?

Accepted Answer

It forms hydrogen bonds, allowing for high surface tension.

Question 20

Which of the following best describes the role of phospholipids in the body?

Accepted Answer

They are the main component of cell membranes.

Chapter 2B: Chemistry Comes Alive – Biochemistry Essentials for Anatomy & Physiology

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