Unit 1, Module 4 - Respiration

Question 0

What are the important facts about energy that must be remembered?

Answer 0

It cannot be created or destroyed only converted from one form to another.
It is measured in joules or kilojoules.
It has many forms.

Question 1

What forms does energy exist in?

Answer 1

Potential energy

Kinetic energy

Question 2

Why do living organisms need energy?

Answer 2

To drive their metabolic processes.

Question 3

What metabolic processes need energy?

Answer 3

Active transport.
Secretion.
Endocytosis.
Synthesis of large molecules from smaller ones.
Replication of DNA and synthesis of organelles before a cell divides.
Movement.
Activation of chemicals.

Question 4

What does ATP stand for?

Answer 4

Adenosine triphosphate.

Question 5

What does each molecule of ATP consist of?

Answer 5

Adenosine - adenine and ribose sugar

Three phosphate groups

Question 6

How much energy is released when ATP is hydrolysed to ADP and Pi?

Answer 6

30.6 KJ energy per mol.

Question 7

What can ATP be described as?

Answer 7

The universal energy currency.

Question 8

What are the four stages of respiration?

Answer 8

Glycolysis
Link reaction
Krebs cycle
Oxidative phosphorylation

Question 9

Which stages of respiration only take place under aerobic conditions?

Answer 9

Link reaction
Krebs cycle
Oxidative phosphorylation

Question 10

What happens to pyruvate under anaerobic conditions?

Answer 10

Is converted to either ethanol or lactate.