Metabolic Pathways

Question 1

What are metabolic pathways?

Answer 1

They are integrated and controlled pathways of enzyme catalysed reactions in a cell.

Question 2

What are two reactions within the metabolic pathways?

Answer 2

• Anabolic reaction
• Catabolic reaction

Question 3

What happens in an anabolic reaction?

Answer 3

Involves the building up of large molecules from small molecules and requires energy

Question 4

What happens in a catabolic reaction?

Answer 4

Involves the break down of large molecules into small molecules and releases energy.

Question 5

What are the routes that a metabolic pathway can have?

Answer 5

Reversible, irreversible and alternative

Question 6

what are the functions of a protein in the membrane?

Answer 6

1. pores - allows molecules to pass through
2. pumps - allows molecules to pass through and requires energy
3. Enzymes - catalysing chemical reactions

Question 7

What controls the metabolic pathways?

Answer 7

They are controlled by the presence or absence of key enzymes.

Question 8

What factors regulate the rate of the metabolic pathways?

Answer 8

• temperature
• ph
• substrate concentration
• inhibition

Question 9

Describe induced fit:

Answer 9

Induced fit is when a substrate binds to the active site and the active site changes shape to allow it to better fit.