Question 1

Which of the following best describes a compound?

Accepted Answer

A substance formed by the chemical bonding of atoms of two or more different elements.

Question 2

What is the molecular formula for glucose, and how many hydrogen atoms does it contain?

Accepted Answer

C\_6H\_12O\_6; 12 hydrogen atoms

Question 3

Which type of chemical bond is formed when electrons are transferred from one atom to another, resulting in the formation of ions?

Accepted Answer

Ionic bond

Question 4

In the formation of NaCl, sodium donates an electron to chlorine. What type of ions are formed?

Accepted Answer

Sodium becomes a cation and chlorine becomes an anion.

Question 5

Which of the following is a correct example of a nonpolar covalent bond?

Accepted Answer

H\_2

Question 6

What is the main difference between a molecule and a macromolecule?

Accepted Answer

A molecule is a small chemical unit, while a macromolecule is a large molecule made of repeating monomers.

Question 7

Which of the following best describes a polar covalent bond?

Accepted Answer

Electrons are shared unequally, resulting in partial charges on the atoms.

Question 8

Which of the following is an example of a catabolic reaction?

Accepted Answer

Glycogen \rightarrow Glucose

Question 9

Which form of energy is directly involved in moving matter, such as muscle contraction?

Accepted Answer

Mechanical energy

Question 10

What is the role of enzymes in chemical reactions within the human body?

Accepted Answer

They lower the activation energy and speed up reaction rates.

Question 11

Which of the following factors will NOT increase the rate of a chemical reaction?

Accepted Answer

Decreasing the concentration of reactants

Question 12

Which of the following is true about enzymes?

Accepted Answer

Enzymes are highly specific for their substrates.

Question 13

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

Accepted Answer

AB + CD \rightarrow AD + BC

Question 14

What is the correct chemical equation for the formation of water from hydrogen and oxygen?

Accepted Answer

$$2H_2 + O_2$ \rightarrow 2H_2O$$

Question 15

Which of the following best explains why water molecules form hydrogen bonds?

Accepted Answer

Water molecules have polar covalent bonds, resulting in partial charges.

Question 16

A reaction requires energy to overcome the repulsion between atoms' electrons. What is this energy called?

Accepted Answer

Activation energy

Question 17

Which of the following is NOT a form of energy found in the human body?

Accepted Answer

Nuclear energy

Question 18

Which statement about the mechanism of enzyme action is correct?

Accepted Answer

Enzymes bind substrates and change shape, facilitating the transition state.

Question 19

Which of the following is a correct example of a synthesis (anabolic) reaction?

Accepted Answer

A + B \rightarrow AB

Question 20

If the concentration of reactants in a solution is doubled, what is the expected effect on the rate of reaction, assuming all other factors remain constant?

Accepted Answer

The rate of reaction will increase.

Chemical Bonds and Chemical Reactions: Foundations for Anatomy & Physiology

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