Module 17 Terms - Cellular Respiration 1: Overview

Question 1

Cellular respiration

Answer 1

A series of chemical reactions that convert the chemical energy in fuel molecules into the chemical energy of ATP

Question 2

Substrate-level phosphorylation

Answer 2

Basically, an enzyme makes ATP. A single enzyme carries out two coupled reactions: the hydrolysis of an organic molecule to get a phosphate group, and the addition of that phosphate group to ADP. A phosphate group is transferred to ADP from an enzyme substrate, hence the name

Question 3

Oxidative phosphorylation

Answer 3

A process in which chemical energy is transferred to electron carriers (NAD+ –> NADH, FAD –> FADH2), which carry electrons and energy to the respiratory electron transport chain. This movement of electrons powers the synthesis of ATP

Question 4

Glycolysis

Answer 4

The first stage of cellular respiration where glucose is partially broken down to produce pyruvate

Question 5

Krebs cycle

Answer 5

In this series of redox reactions, the acetyl group (produced in stage 2) is completely oxidized to CO2, and free energy is transferred to ATP by substrate-level phosphorylation and reduced electron carriers