Chapter 8, Problem 4STP

Summary Introduction

Introduction:

In the process of cellular respiration, energy in form of ATP from the carbohydrates obtained from food. During cellular respiration, carbohydrates or glucose breaks down in several steps generating different amount of ATP. Glycolysis, oxidative decarboxylation, Calvin cycle and oxidative phosphorylation are the different steps of cellular respiration.

Answer to Problem 4STP

Correct answer :

The correct answer is option (A) formation of ATP.

Explanation of Solution

Explanation/justification for the correct answer :

Option (A)formation of ATP. The Calvin cycle or the Krebs’s cycle produces 2 ATP molecules for each molecules of glucose and it plays an important role in the flow of carbon through the cell. So, the correct answer is option (A).

Explanation for incorrect answer :

Option (B) Formation of six carbon sugar. The Calvin cycle starts when, two carbon molecule, acetyl CoA joins with oxaloacetate, 4 carbon molecules, to form citrate. Citrate is a 6 carbon compound.So, this is an incorrect answer.

Option (C)Release of oxygen gas. The Krebs’s cycle or Calvin cycle produces the carbon-di-oxide that is breathed out. So, this is an incorrect answer.

Option (D)Transport of electrons by NADP+. Electrons are unstable in nature and are transferred from one to another molecule forming a chain of redox reaction, which is known as electron transport chain.So, this is an incorrect answer.