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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332

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Chapter
Section
BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332
Chapter 6, Problem 10SQ
Textbook Problem
11 views

In chloroplasts, the light-independent reactions proceed at/in the _______.

  1. a. thylakoid membrane
  2. b. plasma membrane
  3. c. stroma
  4. d. cytoplasm

Summary Introduction

Introduction:

The process of conversion of light energy to chemical energy occurs in two phases of reactions, that is, light-dependent reaction and light-independent reaction. The two phases include under photosynthesis in which absorption of light stimulates an electron molecule to a higher energy state, transforming the energy of sunlight to potential chemical energy.

Explanation of Solution

Reasons for the correct statement:

Option c. is given as “stroma”. The thylakoid membrane is suspended in a cytosol-like fluid, and the outer membrane of a chloroplast is called stroma. The light-independent reactions, ATP and NADPH, drive the synthesis of sugars from carbon dioxide and water. In eukaryotes, these reactions take place in the stroma. Hence, option c. is correct.

Reasons for the incorrect statement:

Option a. is given as “thylakoid membrane”. Thylakoid membrane is the inner membrane system that carries out light-dependent reactions in chloroplasts and cyanobacteria...

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