Help! I need help with Bio-Chemistry? Please

1.

How many electrons can a carbon atom share?
a.
one
c.
three
b.
two
d.
four


2.

A chemical bond that occurs when atoms share electrons is a(n) _______ bond.
a.
covalent
c.
magnetic
b.
ionic
d.
polyatomic


3.

Which of the atoms carbon, sodium or oxygen is most likely to form an ion?
a.
C
c.
O
b.
Na
d.
they are all equally likely to form an ion


4.

What kind of chemical bond is formed when an equal exchange of electrons occurs?
a.
covalent
c.
ionic
b.
hydrate
d.
magnetic


5.

What type(s) of bond(s) does carbon have a tendency to form?
a.
ionic
d.
A and B only
b.
hydrogen
e.
A, B, and C
c.
covalent


6.

A(n) ____ is a substance that produces OH- ions in a solution.
a.
acid
c.
salt
b.
base
d.
alcohol


7.

Which of the following explains why there are so many organic compounds?
a.
Carbon can form four covalent bonds.
c.
Carbon has six protons in its nucleus.
b.
Carbon has six electrons.
d.
Carbon is a nonmetal.


8.

Amino acid is to protein as
a.
fat is to lipid.
c.
sugar is to fat.
b.
DNA is to RNA.
d.
simple sugar is to starch.


9.

Cholesterol is a(n) ____ needed to build cell membranes.
a.
amino acid
c.
carbohydrate
b.
lipid
d.
protein


10.

An unsaturated lipid contains _____.
a.
more oxygen than hydrogen
c.
double bonds
b.
ionic bonds
d.
only one fatty acid


11.

Which bonds are created during the formation of the primary structure of a protein?
a.
phosphodiester bonds
d.
peptide bonds
b.
hydrogen bonds
e.
A, B, and C
c.
disulfide bonds


12.

Which element would need to be removed from a saturated fatty acid to make it unsaturated?