Chapter 02: The Chemical Basis of Life

Chapter 02: The Chemical Basis of Life

 

Complete Chapter Questions With Answers

 

Sample Questions Are Posted Below 

 

Chapter 02-A: The Chemical Basis of Life

 

Test Bank

 

TRUE/FALSE

 

1. Biochemistry involves the chemical makeup of living organisms and the underlying process of life activities.

 

ANS:   T                      DIF:    Memorization                                     REF:    Page 34

TOP:    Introduction

 

2. The number of protons in the nucleus of an atom determines its atomic mass.

 

ANS:   F                      DIF:    Memorization                                     REF:    Page 36

TOP:    Atomic Number and Atomic Mass

 

3. The positively charged electrons are found in clouds outside the nucleus of an atom.

 

ANS:   F                      DIF:    Memorization                                     REF:    Page 36

TOP:    Atomic Structure

 

4. Two shared pairs of electrons represent a single covalent bond.

 

ANS:   F                      DIF:    Application     REF:    Page 39           TOP:    Covalent Bonds

 

5. The digestion of food is an example of a decomposition reaction.

 

ANS:   T                      DIF:    Application     REF:    Page 41

TOP:    Chemical Reactions

 

6. The number and arrangement of electrons orbiting in an atom’s outer shell determine its chemical activity.

 

ANS:   T                      DIF:    Application     REF:    Page 37           TOP:    Energy Levels

 

7. An atom is chemically inert if its outermost shell has two pairs of electrons.

 

ANS:   F                      DIF:    Application     REF:    Page 37           TOP:    Energy Levels

 

8. An isotope of an element contains the same number of neutrons but different numbers of protons.

 

ANS:   F                      DIF:    Memorization                                     REF:    Page 37

TOP:    Isotopes

 

 

MULTIPLE CHOICE

 

1. Which of the following represents a trace element in the body?

a.	Sulfur
b.	Chlorine
c.	Iron
d.	Phosphorus

 

ANS:   C                     DIF:    Memorization

REF:    Page 35 (Table 2-1)                            TOP:    Basic Chemistry

 

2. The kind of element is determined by the number of:

a.	protons.
b.	neutrons.
c.	mesotrons.
d.	electrons.

 

ANS:   A                     DIF:    Application     REF:    Page 36

TOP:    Atomic Number and Mass Number

 

3. Atomic weight is determined by the number of:

a.	protons and electrons.
b.	neutrons and electrons.
c.	neutrons, protons, and electrons.
d.	protons and neutrons.

 

ANS:   D                     DIF:    Application     REF:    Page 36

TOP:    Atomic Number and Mass Number

 

4. Carbon has an atomic number of 6. The number of electrons found in the first shell is:

a.	2.
b.	4.
c.	6.
d.	8.

 

ANS:   A                     DIF:    Application     REF:    Page 37           TOP:    Energy Levels

 

5. The atomic number of carbon is 6. How many unpaired electrons are in its outer shell?

a.	2
b.	3
c.	4
d.	5

 

ANS:   C                     DIF:    Application     REF:    Page 37           TOP:    Energy Levels

 

6. A negatively charged subatomic particle that moves around the nucleus is a(n):

a.	orbital.
b.	proton.
c.	neutron.
d.	electron.

 

ANS:   D                     DIF:    Memorization                                     REF:    Page 36

TOP:    Atomic Structure