Energy Reactions in Cells

Question 1

What is the definition of metabolism?

Answer 1

The set of processes which derive energy and raw materials from food and use them to support repair growth and activity of the tissues

Question 2

What are the main types of metabolic pathways?

Answer 2

Catabolic pathways

Anabolic pathways

Question 3

What are the features of catabolic pathways?

Answer 3

Breakdown of larger molecules into smaller ones

Releases free energy

Oxidative

Question 4

What are the features of anabolic pathways?

Answer 4

Synthesise larger molecules

Use energy

Reductive

Question 5

What are the products of catabolic metabolism used to supply?

Answer 5

Building blocks
Organic precursors
Biosynthetic reducing power
Energy for cell function

Question 6

What type of work does the body need energy for?

Answer 6

Biosynthetic work - anabolism 
Transport work - membranes
Mechanical work - muscle contraction 
Electrical work - nervous impulse conduction 
Osmotic work - kidney

Question 7

How many kilojoules per kcal?

Answer 7

4.2

Question 8

What are the main types of reaction?

Answer 8

Exothermic

Endothermic

Question 9

What are exothermic reactions?

Answer 9

Release energy

-ΔG

Question 10

What are endothermic reactions?

Answer 10

Require energy

+ΔG

Question 11

What is an oxidation reaction?

Answer 11

Removal of electrons

Removal of H+

Question 12

What is a reduction reaction?

Answer 12

Gain of electrons

Question 13

What is a redox reaction?

Answer 13

Reaction with both oxidation and reduction

Question 14

What are the common H carrier molecules?

Answer 14

NAD+
NADP+
FAD

Question 15

What is the ATP-ADP cycle?

Answer 15

ATP ADP + Pi