Q: Which of the following is a correct representation of Avogadro's number?

$6.02 \times 10^{23}$ molecules

Q: Which equation correctly represents the oxidation of glucose in cellular respiration?

$C_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2O + \text{Energy}$

Question 1

Which of the following best describes a colloid found in the human body?

Accepted Answer

A heterogeneous mixture with solute particles that do not settle out but scatter light, such as cytosol

Question 2

A solution is prepared by dissolving 180.12 grams of glucose ($C_6H_{12}O_6$) in enough water to make 1 liter. What is the molarity ($M$) of this solution?

Accepted Answer

$1\ M$

Question 3

Which statement correctly distinguishes mixtures from compounds?

Accepted Answer

Mixtures can be separated by physical means, while compounds require chemical means for separation

Question 4

Which of the following is an example of a suspension in the human body?

Accepted Answer

Unsettled blood containing red blood cells

Question 5

If a solution contains 80 mg of glucose per deciliter, what is the concentration in mg/L?

Accepted Answer

$800\ mg/L$

Question 6

Which of the following best explains why oxygen atoms do NOT engage in ionic bonding with each other?

Accepted Answer

Oxygen atoms have similar electronegativities and prefer to share electrons, forming covalent bonds

Question 7

Which of the following is a correct representation of Avogadro's number?

Accepted Answer

$6.02 	imes 10^{23}$ molecules

Question 8

Which type of chemical bond is formed by the sharing of two or more valence shell electrons between atoms?

Accepted Answer

Covalent bond

Question 9

A chemical reaction in the body releases energy and results in products with less potential energy than the reactants. What type of reaction is this?

Accepted Answer

Exergonic reaction

Question 10

Which of the following best describes a polar covalent bond?

Accepted Answer

Electrons are shared unequally, resulting in partial charges on atoms

Question 11

Which of the following is a legitimate example of an exchange (displacement) reaction?

Accepted Answer

$AB + CD \rightarrow AC + BD$

Question 12

What is the driving force behind chemical reactions for most atoms?

Accepted Answer

Achieving a full valence shell of 8 electrons (octet rule)

Question 13

Which of the following best describes a hydrogen bond?

Accepted Answer

A weak attraction between a hydrogen atom in one molecule and an electronegative atom in another molecule

Question 14

Which of the following factors will increase the rate of a chemical reaction in the body?

Accepted Answer

Adding a biological catalyst (enzyme)

Question 15

Which equation correctly represents the oxidation of glucose in cellular respiration?

Accepted Answer

$C_6H_{12}O_6 + 6O_2 ightarrow 6CO_2 + 6H_2O + 	ext{Energy}$

Question 16

Which of the following is true about catalysts in biological reactions?

Accepted Answer

They increase the rate of reaction without being changed or becoming part of the product

Question 17

A solution is made by dissolving 15 grams of salt in 85 grams of water. What is the percent concentration of salt in this solution?

Accepted Answer

$15\%$

Question 18

Which of the following best describes a synthesis (combination) reaction?

Accepted Answer

A reaction where atoms or molecules combine to form a larger, more complex molecule

Question 19

Which of the following is true about the valence shell of an atom?

Accepted Answer

It contains electrons involved in chemical reactions and has the most potential energy

Question 20

Which of the following is a correct statement about reversible chemical reactions?

Accepted Answer

Equilibrium occurs when the forward and reverse reactions proceed at equal rates

Basic Chemistry Concepts for Anatomy & Physiology: Mixtures, Solutions, Chemical Bonds, and Reactions

Study Guide - Practice Questions

Study Guide - Flashcards