Review Questions

1.

Which of the following components is not used by both plants and cyanobacteria to carry out photosynthesis?

1. carbon dioxide
2. chlorophyll
3. chloroplasts
4. water

2.

Why are chemoautotrophs not considered the same as photoautotrophs if they both extract energy and make sugars?

1. Chemoautotrophs use wavelengths of light not available to photoautotrophs.
2. Chemoautotrophs extract energy from inorganic chemical compounds.
3. Photoautotrophs prefer the blue side of the visible light spectrum.
4. Photoautotrophs make glucose, while chemoautotrophs make galactose.

3.

In which compartment of the plant cell do the light-independent reactions of photosynthesis take place?

1. mesophyll
2. outer membrane
3. stroma
4. thylakoid

4.

What is a part of grana?

1. the Calvin cycle
2. the inner membrane
3. stroma
4. thylakoids

5.

What are two major products of photosynthesis?

1. chlorophyll and oxygen
2. oxygen and carbon dioxide
3. sugars/carbohydrates and oxygen
4. sugars/carbohydrates and carbon dioxide

6.

What is the primary energy source for cells?

1. glucose
2. starch
3. sucrose
4. triglycerides

7.

Which portion of the electromagnetic radiation originating from the sun is harmful to living tissues?

1. blue
2. green
3. infrared
4. ultraviolet

8.

The amount of energy in a wave can be measured using what trait?

1. color intensity
2. distance from trough to crest
3. the amount of sugar produced
4. wavelength

9.

What portion of the electromagnetic radiation emitted by the sun has the least energy?

1. gamma
2. infrared
3. radio
4. X-rays

10.

What is the function of carotenoids in photosynthesis?

1. They supplement chlorophyll absorption.
2. They are visible in the fall during leaf color changes.
3. They absorb excess energy and dissipate it as heat.
4. They limit chlorophyll absorption.

11.

Which of the following structures is not a component of a photosystem?

1. antenna molecule
2. ATP synthase
3. primary electron acceptor
4. reaction center

12.

Which complex is not involved in producing the electrochemical gradient for of ATP synthesis?

1. antenna complex
2. cytochrome complex
3. Photosystem I
4. Photosystem II

13.

What can be calculated from a wavelength measurement of light?

1. a specific portion of the visible spectrum
2. color intensity
3. the amount of energy of a wave of light
4. the distance from trough to crest of the wave

14.

Which molecule must enter the Calvin cycle continually for the light-independent reactions to take place?

1. CO₂
2. RuBisCO
3. RuBP
4. 3-PGA

15.

Which order of molecular conversions is correct for the Calvin cycle?

1. RuBP +G3P →3-PGA →sugar
2. RuBisCO →CO2 →RuBP →G3P
3. RuBP+CO2 →[RuBisCO]3-PGA →G3P
4. CO2 →3-PGA→RuBP →G3P

16.

Which statement correctly describes carbon fixation?

1. the conversion of CO2 into an organic compound
2. the use of RuBisCO to form 3-PGA
3. the production of carbohydrate molecules from G3P
4. the use of ATP and NADPH to reduce CO2

17.

Which substance catalyzes carbon fixation?

1. 3-PGA
2. NADPH
3. RuBisCO
4. RuBP

18.

Which pathway is used by both plants and animals?

1. carbon fixation
2. cellular respiration
3. photosystem II
4. photosynthesis

19.

Which of the following organisms is a heterotroph?

1. Cyanobacterium
2. intestinal bacteria
3. kelp
4. pond algae

20.

What is the role of rribulose 1,5, bisphosphate carboxylase/oxygenase, abbreviated RuBisCO, in photosynthesis?

1. It catalyzes the reaction between CO2 and ribulose bisphosphate (RuBP).
2. It catalyzes the reaction that produces glyceraldehyde3-phosphate (G3P).
3. It catalyzes the reaction that regenerates RuBP.
4. It catalyzes the reaction utilizing ATP and NADPH.

21.

What is the product of the Calvin cycle?

1. glucose
2. glyceraldehyde-3-phosphate
3. phosphoglycerate (PGA)
4. sucrose