Cell Energy I

Question 1

True or False: photosynthesis occurs in plants,
algae, and some bacteria, whereas cell respiration
only takes place in animals.

Answer 1

True

Question 2

Which of the following statements is not true?
Choose one:
A. When a sugar molecule is oxidized to CO2 and H2O, the O2 molecules involved in
forming the H2O are reduced.
B. When a carbon atom in a C–H bond has somewhat more than its share of
electrons, it is said to be reduced.
C. Oxidation and reduction reactions always occur simultaneously.
D. Hydrogenation reactions are oxidations, and dehydrogenation reactions are reductions.

Answer 2

D. Hydrogenation reactions are oxidations, and dehydrogenation reactions are reductions

Question 3

how do activated carriers store energy?

Answer 3

in the form of chemical bonds or electrons

Question 4

True or False: ATP hydrolysis is often accompanied by a transfer of the terminal
phosphate in ATP to another molecule.

Answer 4

True

Question 5

Q: what is the active site of redox reactions in NADH and NADPH?

Answer 5

nicotinamide ring

Question 6

True or False: NADH is primarily involved in
breaking down molecules, whereas NADPH is
mainly used in building molecules.

Answer 6

True

Question 7

Q: where is energy stored in Acetyl coenzyme A?

Answer 7

in the thioester bond in the terminal acetyl end of the enzyme

Question 8

Which of the following statements is not true?
A. The formation of an activated carrier is coupled to an energetically favorable
reaction.
B. ATP is the most widely used activated carrier.
C. NADH and NADPH are both activated carriers of electrons, and they have the
same function in cells.
D. Cells make use of many other activated carriers.

Answer 8

C. NADH and NADPH are both activated carriers of electrons, and they have the
same function in cells.