Question

section 4.1, continued atp
practice 2
answer the following questions about atp. darken the circle or circles that correspond to your answer choice(s).

1. which of the following are a part of an atp molecule? choose all that apply.

a deoxyribose sugar b adenine e phosphate
c ribose sugar d bicarbonate f cytosine

1. how is adp different from atp?

a adp has one less phosphate group and can store more energy.
b adp has one more phosphate group and can store more energy.
c adp has one more phosphate group and stores less energy.
d adp has one less phosphate group and stores less energy.

1. when is energy released from atp?

a a chemical bond is broken and a phosphate is removed.
b a chemical bond is broken and a phosphate is added.
c a chemical bond is formed as a phosphate is removed.
d a chemical bond is formed as a phosphate is added.

1. which process(es) use atp in a cell? choose all that apply.

a active transport c facilitated diffusion e simple diffusion
b moving organelles d osmosis f sodium - potassium pump

1. which type of energy is stored in atp?

a chemical potential b chemical kinetic c mechanical potential d mechanical kinetic

Explanation:

1. ATP consists of adenine, ribose sugar, and phosphate groups. Deoxyribose sugar is part of DNA, bicarbonate and cytosine are not part of ATP.
2. ADP (adenosine - diphosphate) has one less phosphate group than ATP (adenosine - tri - phosphate) and stores less energy.
3. Energy is released from ATP when a chemical bond is broken and a phosphate is removed.
4. Active transport, moving organelles, and the sodium - potassium pump require energy in the form of ATP. Facilitated diffusion, simple diffusion, and osmosis are passive transport processes that do not require ATP.
5. The energy stored in ATP is in the form of chemical potential energy due to the high - energy phosphate bonds.

Answer:

1. B. adenine, C. ribose sugar, E. phosphate
2. D. ADP has one less phosphate group and stores less energy.
3. A. A chemical bond is broken and a phosphate is removed.
4. A. active transport, B. moving organelles, F. sodium - potassium pump
5. A. chemical potential