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Chapter 8: Q. 27 (page 225)

What are the roles of ATP and NADPH in photosynthesis?

Short Answer

Expert verified

NADPH is employed as a reducing agent while ATP is used to supply energy for numerous endogenic reactions in the Calvin cycle or dark reactions.

Step by step solution

01

Introduction

Photosynthesis is the process by which green plants and some other creatures manufacture nutrients from carbon dioxide and water using sunshine.

The energy carriers are ATP (adenosine triphosphate) and Nicotinamide adenine dinucleotide phosphate hydrogen. ATP hydrolyzes to generate ADP, while NADPH oxidizes to NADP+, releasing energy and electrons for various metabolic processes, respectively.

02

Explanation

During light independent or dark processes during photosynthesis, ATP and NADPH are employed to supply energy and as a reducing agent for the fixation of carbon dioxide to glucose.

The conversion of 1, 3-biphophoglycerate to glyceraldehyde phosphate requires ATP. It's also employed in the conversion of ribulose-5-phosphate to ribulose 1, 5-biphosphate.

During the Calvin cycle's reduction phase, NADH is needed to convert 1, 3-biphosphoglycerate to glyceraldehyde-3-phosphate.

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Most popular questions from this chapter

Why is the third stage of the Calvin cycle called the regeneration stage?

What two main products result from photosynthesis?

a. oxygen and carbon dioxide

b. chlorophyll and oxygen

c. sugars/carbohydrates and oxygen

d. sugars/carbohydrates and carbon dioxide

How does the closing of the stomata limit photosynthesis?

Describe how the grey wolf population would be impacted by a volcanic eruption that spewed a dense ash cloud that blocked sunlight in a section of Yellowstone National Park?

Figure8.6On a hot, dry day, the guard cells of plants close their stomata to conserve water. What impact will this have on photosynthesis?
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