Respiration

Question 1

Where does glycolysis occur?

Answer 1

Cytoplasm

Question 2

What are the products of glycolysis?

Answer 2

• 2 x 3C pyruvate
• Net gain of 2 ATP
• 2 NADH

Question 3

Describe the process of glycolysis:

Answer 3

• Glucose is phosphorylated twice using 2 ATP into glucose phosphate (6C)
• Glucose phosphate converts into 2 x Triose Phosphate molecules (3C)
• Triose phosphate is dehydrogenised and oxidised to produce 2 x Pyruvate (3C)
• this substrate-level phosphorylation produces 4 ATP and 2 NAD and reduced to produce 2 NADH

Question 4

Where does link reaction occur?

Answer 4

• Mitochondrial matrix

Question 5

Explain why a log scale is used to record the number of cells

Answer 5

• large range
• large increase in numbers