Problem:

Question 1: A cell needs ________ to obtain unsaturated fatty acids from saturated fatty acids.
A)glycoproteins
B)glycerol
C)cholesterol
D)phospholipids
E)desaturases

Question 2: The role of the oxygen molecules required for aerobic respiration is to
A)accept electrons directly from either NADH or FADH2.
B)accept the low energy electrons at the end of the electron transport chain.
form ATP.
C)to produce CO2.
D)store high energy electrons to pass to complex I of the electron transport chain.

Question 3: Under which condition will a reaction be spontaneous?
A)when ?G is positive
B)when ?H is negative
C)when the product(s) will have more free energy than the reactant(s)
D)when ?S is negative
E)none of the above

Question 4: Reaction centre complexes of the light-dependent reactions contain ________ and ________, which receive energy from ________.

A)chlorophyll; antenna complexes; carotenoids
B)accessory pigments; chlorophyll; antenna complexes
C)carotenoids; proteins; chlorophyll
D)proteins; antenna complexes; carotenoids
E)chlorophyll; proteins; antenna complexes

Please provide correct answer.