Question 1

Which of the following best describes the difference between dehydration synthesis and hydrolysis reactions in biological systems?

Accepted Answer

Dehydration synthesis removes water to form bonds, while hydrolysis adds water to break bonds.

Question 2

Which of the following statements about redox reactions is correct?

Accepted Answer

Oxidation is the loss of electrons, and reduction is the gain of electrons.

Question 3

Given the chemical equation $$6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6$ + 6O_2$$, which number represents the coefficient for water, and what does it indicate?

Accepted Answer

The coefficient is 6, indicating six molecules of water are involved.

Question 4

Which of the following best describes the role of ATP in cellular metabolism?

Accepted Answer

ATP releases energy when one or more phosphate groups are removed.

Question 5

A solution with a pH of 3 is how many times more acidic than a solution with a pH of 6?

Accepted Answer

1000 times

Question 6

Which of the following is a property of water that allows it to move up plant stems against gravity?

Accepted Answer

Capillary action

Question 7

Which of the following best describes an ionic bond?

Accepted Answer

A bond formed by transferring electrons from one atom to another.

Question 8

Which of the following is true about isotopes?

Accepted Answer

Isotopes have the same number of protons but different numbers of neutrons.

Question 9

Which of the following best describes a hypertonic solution relative to a cell?

Accepted Answer

The solute concentration is higher outside the cell than inside.

Question 10

Which of the following is a correct statement about the structure of DNA?

Accepted Answer

DNA is double-stranded and contains thymine.

Question 11

Which of the following is a function of proteins in living organisms?

Accepted Answer

Catalyzing biochemical reactions as enzymes

Question 12

Which of the following best describes the primary structure of a protein?

Accepted Answer

The sequence of amino acids in a single chain

Question 13

Which of the following is a property of phospholipids that is critical for cell membrane structure?

Accepted Answer

They have hydrophilic heads and hydrophobic tails.

Question 14

Which of the following is a correct pairing of a nucleotide base in DNA?

Accepted Answer

Guanine pairs with cytosine

Question 15

Which of the following best describes a polysaccharide?

Accepted Answer

A long chain of monosaccharide units

Question 16

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

Accepted Answer

It is a precursor for steroid hormone synthesis.

Question 17

Which of the following best describes the difference between a cation and an anion?

Accepted Answer

A cation has lost electrons and is positively charged, while an anion has gained electrons and is negatively charged.

Question 18

Which of the following is true about van der Waals forces?

Accepted Answer

Their strength decreases rapidly with increasing distance between atoms.

Question 19

Which of the following is a correct statement about acids and bases?

Accepted Answer

Acids release hydrogen ions (H+) in water.

Question 20

Which of the following best describes the composition of a nucleotide?

Accepted Answer

A phosphate group, a pentose sugar, and a nitrogenous base

Chemistry of Life: Foundations for Microbiology

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