Chapter 2 book review

Question 1

Which of the following forms of energy is the stimulus for vision?
a) chemical
b) electrical
c) mechanical
d) radiant

Answer 1

d) radiant

Question 2

All of the following are examples of the four major elements contributing to the body mass except:
a) hydrogen
b) carbon
c) nitrogen
d) sodium
e) oxygen

Answer 2

d) sodium

Question 3

The subatomic particles responsible for the chemical behavior of atoms are:
a) electrons
b) ions
c) neutrons
d) protons

Answer 3

a) electrons

Question 4

Which of the following does not describe a mixture
a) properties of its components are retained
b) chemical bonds are formed
c) components can be separated physically
d) includes both heterogenous and homogenous examples

Answer 4

b) chemical bonds are formed

Question 5

In a beaker of water, the water-water bonds can properly be called
a) ionic bonds
b) polar covalent bond
c) nonpolar covalent
d) hydrogen bond

Answer 5

d) hydrogen bond

Question 6

When a pair of electrons is shared between two atoms, the bond formed is called
a) single covalent bond
b) a double covalent bond
c) a triple covalent bond
d) an ionic bond

Answer 6

a) single covalent bond

Question 7

Factors that accelerate the rate of chemical reactions include all but:
a) the presence of catalysts
b) increasing temperature
c) increasing particle size
d) increasing concentration of the reactants

Answer 7

c) increasing particle size

Question 8

Which of the following molecules is an inorganic molecule?
a) sucrose
b) cholesterol
c) collagen
d) sodium chloride

Answer 8

D) sodium chloride

Question 9

Acids
a) release hydroxyl ions when dissolved in water
b) are proton acceptors
c) cause the pH of a solution to rise
d) release protons when dissolved in water

Answer 9

d) release protons when dissolved in water

Question 10

A triglyceride consists of
a) glycerol plus three fatty acids
b) a sugar phosphate backbone to which two amino groups are attached
c) two several hexoses
d) amino acids that have been thoroughly saturated with hydrogen

Answer 10

a) glycerol plus three fatty acids

Question 11

the lipid(s) used as the basis of vitamin D, sex hormones, and bile salts is/are:
a) triglycerides
b) cholesterol
c) phospholipids
d) prostaglandin

Answer 11

b) cholesterol