Chapter 9.2.1 (Exam 2) Glycolysis

Question 1

Where does glycolysis take place?

Answer 1

Takes place in the cytoplasm

Question 2

How many steps are in glycolysis?

Answer 2

10 steps

Question 3

What are the initial reactants and net final products of glycolysis?

Answer 3

Reactants: Glucose

Net Products: 2 Pyruvate + 2 ATP + NADH

Question 4

How many ATP do steps 1-5 of glycolysis use?

Answer 4

Use 2 ATP

Question 5

How much ATP and NADH do steps 6-10 of glycolysis use?

Answer 5

Generates 4 ATP and 2 NADH

Question 6

Which two types of reactions occur repeatedly in many metabolic pathways?

Answer 6

Oxidation–reduction: NAD⁺ → NADH

Substrate-level phosphorylation: ADP + X-P → ATP + X

Question 7

Where does pyruvate oxidation occur?

Answer 7

Occurs in the mitochondrial matrix

Question 8

What is pyruvate oxidized into?

Answer 8

Pyruvate → Acetate + CO₂

Question 9

How is acetyl CoA formed?

Answer 9

Acetate + CoA → Acetyl CoA

Question 10

Is pyruvate oxidation endergonic or exergonic?

Answer 10

Exergonic; one NAD⁺ is reduced to NADH

Question 11

What is pyruvate oxidation catalyzed by?

Answer 11

The pyruvate dehydrogenase complex

Question 12

What is the pyruvate dehydrogenase complex?

Answer 12

three enzymes that catalyze the three intermediate steps in the process

Question 13

How does Acetyl CoA initiate the Citric Acid Cycle?

Answer 13

Acetyl CoA donates its acetyl group to oxaloacetate, forming citrate

This initiates the citric acid cycle