Respiration: Glycolysis S1

Question 1

Where does glycolysis occur?

Answer 1

Occurs in the cytoplasm

Question 2

What are the products of glycolysis?

Answer 2

2 molecules of pyruvate

2 molecules of reduced NAD

2 molecules of ATP

Question 3

Outline the stages of glycolysis

Answer 3

1. Glucose gains two phosphate groups from two ATP molecules to become hexose bisphosphate
2. Hexose bisphosphate is then split into two triose phosphate molecules
3. Triose phosphate gains a phosphate group from the cytoplasm to become triose bisphosphate
4. The triose bisphosphate is converted into two molecules of pyruvate, through oxidation. This causes the release of two hydrogen molecules that join with NAD to form reduced NAD
5. Two phosphate groups are removed and collected by two ADP molecules
6. Pyruvate is then transported into the mitochondria for aerobic respiration

Question 4

In stage three of glycolysis, it states:
3. A phosphate group is then added onto the triose phosphate to become triose bisphosphate

Where does this phosphate group come from?

Answer 4

The phosphate group is added from the cytoplasm

Question 5

How does the pyruvate from glycolysis enter the mitochondria?

Answer 5

Through active transport