Chapter 6:
The Chemistry of Life
1.
Glucose and fructose, with the formula C
6
H
12
O
6
, differ in _____.
a.
numbers of atoms
b.
arrangement of electrons
c.
arrangement of atoms
d.
kinds of atoms
Hint
2.
Which of the atoms pictured in Figure 6-3 is most likely to form an ion?
a.
they are all equally likely to form an ion
b.
Na
c.
O
d.
C
Hint
3.
Which of the following is a chemical reaction?
a.
burning paper
b.
picking up iron filings with a magnet
c.
tearing paper into strips
d.
mixing salt and sugar in the same container
Hint
4.
Which element would need to be removed from the molecule in Figure 6-5 to make it unsaturated?
a.
hydrogen
b.
oxygen
c.
phosphorus
d.
carbon
Hint
5.
A chlorine atom becomes a chloride ion when it _____.
a.
gains a neutron
b.
loses an electron
c.
loses a proton
d.
gains an electron
Hint
6.
An unsaturated lipid contains _____.
a.
only one fatty acid
b.
double bonds
c.
ionic bonds
d.
more oxygen than hydrogen
Hint
7.
Unlike carbohydrates and fats, proteins contain _____.
a.
carbon
b.
nitrogen
c.
hydrogen
d.
oxygen
Hint
8.
_____ represents a formula for a chemical compound.
a.
C
b.
H
2
O
c.
P
d.
H
Hint
9.
Carbon-12, carbon-13, and carbon-14 are _____.
a.
polymers
b.
isotopes
c.
macromolecules
d.
radioisotopes
Hint
10.
Which of the images in Figure 6-4 depicts dynamic equilibrium?
a.
A
b.
C
c.
B
d.
D
Hint
