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Chapter 8: Q.8 (page 225)

Which part of the light-independent reactions would be affected if a cell could not produce the enzyme RuBisCO?

Short Answer

Expert verified

None of the cycle could take place, because RuBisCO its essential in fixing carbon dioxide.

Step by step solution

01

Step1. Introduction 

The light-independent reactions can proceed once products (NADPH and ATP) of the light-dependent reactions are present in the chloroplast.

RuBisCo is an enzyme that catalyzes the attachment of carbon molecule to ribulose phosphate (RuBp) forming the 6-carbon molecule that immediately splits into two 3-carbon molecules of 3-phosphoglycerate (3-PGA).

02

Step2. Explanation 

Specifically, RuBisCO catalyzes the reaction between carbon dioxide and RuBP at the start of the cycle.

If a cell could not produce the enzyme RuBisCO , none of the cycle could take place, because RuBisCO its essential in fixing carbon dioxide.

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Most popular questions from this chapter

Which statement correctly describes carbon fixation?
a. the conversion of CO2 into an oraganic compound
b. the use of RuBisCO to form 3-PGA
c. the production of carbohydrate molecules from G3P
d. the formation of RuBP from G3P molecules
e. the use of ATP and NADPH to reduce CO2

Plants containing only chlorophyll b are exposed to
radiation with the following wavelengths: 10nm (x -rays),(450nm),(blue light), (670nm) (red light), and 800nm (infrared light). Which plants harness the most energy
for photosynthesis?
a. X-ray irradiated plants
b. Blue light irradiated plants
c. Red light irradiated plants
d. Infrared irradiated plants

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

a. RuBisCO

b. RuBP

c. 3-PGA

d.CO2

Where in eukaryotic cells does the Calvin cycle take place?

a. thylakoid membrane

b. thylakoid lumen

c. chloroplast stroma

d. granum

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

a. chloroplasts

b. chlorophyll

c. carbon dioxide

d. water
See all solutions

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