Biology F4 C7 & 8

Question 1

Energy :

1. Catabolism
2. Anabolism

Answer 1

Catabolism : Releases energy (breakdown of complex to simpler molecules)
Anabolism : Uses energy (synthesise of complex molecules from simple molecules)

Question 2

Name the main substrate for cellular resp.

Answer 2

Glucose

Question 3

Definition of cellular respiration

Answer 3

Oxidation process

of organic molecules

through several stages

to release energy

Question 4

Difference between aerobic respiration and anaerobic resp.

Answer 4

Aerobic : occurs in the presence of oxygen

Anaerobic : occurs in the absence of oxygen

Question 5

Definition of aerobic respiration

Answer 5

Breakdown of glucose

involving oxygen

to produce chemical energy

Question 5

Definition of glycolysis.

Answer 5

Breakdown of glucose

by enzymes

Question 6

definition of fermentation

Answer 6

1. incomplete glucose breakdown
2. when limited O2
3. or w/o O2

Question 7

similarities between aerobic respiration and fermentation

Answer 7

1. process of glucose breakdown and its conversion to chemical energy
2. begins in cytoplasm
3. occurs in yeast, bacteria, animals & plants
4. produces chemical energy in ATP
5. begins with glycolysis when glucose is converted to pyruvate