Question

section 7 review, continued

1. cellular respiration is an aerobic process because it must have which of the following to occur?

a sunlight
b water
c oxygen
d glycogen

1. the krebs cycle will not occur if —

a oxygen is present.
b fermentation occurs.
c carbon dioxide is present.
d water is present.

1. a green pigment that traps energy from sunlight is —

a chloroplasts.
b atp.
c chlorophyll.
d thylakoid membranes.

1. during photosynthesis, the light reactions —

a release carbon dioxide.
b release oxygen.
c create water molecules from hydrogen and oxygen.
d produce nadp.

1. which of the following best summarizes the process of photosynthesis?

a c + o₂ + h₂o + energy → co₂ + h₂o
b 6co₂ + 6h₂o + energy → c₆h₁₂o₆ + 6o₂
c c₁₂h₆o₆ → 6co₂ + 6h₂o + energy
d 6co + 6h₂o → c₆h₁₂o₆ + energy

1. plants take in the sun’s energy by absorbing —

a high - energy carbohydrates.
b chlorophyll.
c chloroplasts.
d sunlight.

1. during photosynthesis, the light - dependent reactions produce all of the following except —

a oxygen.
b atp.
c nadph.
d glucose.

1. the calvin cycle produces —

a oxygen gas.
b adp.
c high - energy sugar.
d carbon dioxide.

Explanation:

1. Cellular respiration is aerobic as it requires oxygen.
2. The Krebs cycle is part of aerobic respiration; fermentation is anaerobic, so Krebs won't occur if fermentation does.
3. Chlorophyll is the green pigment trapping sunlight energy.
4. In photosynthesis light reactions release oxygen.
5. The correct formula for photosynthesis is \(6CO_{2}+6H_{2}O+\text{energy}\to C_{6}H_{12}O_{6}+6O_{2}\).
6. Plants absorb sunlight for energy.
7. Light - dependent reactions produce oxygen, ATP, and NADPH, not glucose.
8. The Calvin cycle produces high - energy sugar.

Answer:

1. C. oxygen
2. B. fermentation occurs
3. C. chlorophyll
4. B. release oxygen
5. B. \(6CO_{2}+6H_{2}O+\text{energy}\to C_{6}H_{12}O_{6}+6O_{2}\)
6. D. sunlight
7. D. glucose
8. C. high - energy sugar