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Chapter 8: 27.question (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

step-1: definition

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

02

step-2: Introduction

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.

03

step-3: 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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