$$[H^+] = 1 \times 10$$^{-4}$$ \ \mathrm{M}$$

Question 1

Which of the following best describes an isotope?

Accepted Answer

An atom of the same element with a different number of neutrons

Question 2

A solution has a pH of 4. What is the hydrogen ion concentration $$[H^+] in $$this solution?

Accepted Answer

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

Question 3

Which of the following statements about water is FALSE?

Accepted Answer

Water is an excellent solvent because it is nonpolar

Question 4

Which type of chemical bond is primarily responsible for the secondary structure of proteins?

Accepted Answer

Hydrogen bonds

Question 5

A dehydration synthesis reaction between two monosaccharides results in the formation of:

Accepted Answer

A disaccharide and water

Question 6

Which of the following best explains why phospholipids form bilayers in water?

Accepted Answer

Their fatty acid tails are hydrophobic and cluster away from water, while phosphate heads are hydrophilic

Question 7

Which of the following is a correct example of an exchange reaction?

Accepted Answer

$$AB + CD \rightarrow AD + CB$$

Question 8

Which of the following is TRUE regarding the structure of DNA?

Accepted Answer

It is a double-stranded helix with complementary base pairing

Question 9

Which of the following best describes the role of buffers in biological systems?

Accepted Answer

They prevent drastic changes in internal pH

Question 10

A protein loses its three-dimensional structure and function after being exposed to high heat. This process is called:

Accepted Answer

Denaturation

Question 11

Which of the following is NOT a function of proteins in living organisms?

Accepted Answer

Genetic information storage

Question 12

Which of the following statements about ATP is correct?

Accepted Answer

ATP contains three phosphate groups, a ribose sugar, and adenine

Question 13

Which of the following best describes a polar covalent bond?

Accepted Answer

A bond where electrons are shared unequally, creating partial charges

Question 14

Which of the following is a property of saturated fatty acids?

Accepted Answer

They contain no double bonds and are solid at room temperature

Question 15

Which of the following is a correct statement about acids?

Accepted Answer

Acids release hydrogen ions (H+) in solution

Question 16

Which of the following is a function of carbohydrates in cells?

Accepted Answer

Providing long-term and ready energy storage

Question 17

Which of the following best explains why salts are important in biological systems?

Accepted Answer

They create electrical differences across cell membranes and are components of enzymes

Question 18

Which of the following is TRUE about the quaternary structure of proteins?

Accepted Answer

It involves the association of two or more polypeptide chains

Question 19

Which of the following is a correct example of a neutralization reaction?

Accepted Answer

$$HCl + NaOH \rightarrow NaCl + H_2O$$

Question 20

Which of the following is a property of RNA but NOT DNA?

Accepted Answer

Contains the base uracil

The Chemistry of Microbiology: Structured Study Notes

Study Guide - Practice Questions