Revision questions - Introduction to Metabolism

Question 1

What is metabolism? (slide 4)

1. All digestive reactions in the body
2. All chemical reactions in the body
3. Reactions in the body that produce heat
4. Reactions in the body that produce ATP

Answer 1

1. All chemical reactions in the body

Question 2

What does metabolism not provide for?

1. Creation of chemical energy
2. Storage of chemical energy
3. Capture of chemical energy
4. Release of chemical energy

Answer 2

1. Creation of chemical energy

Question 3

Some chemical reactions in metabolism are reversible. (slide 5)

1. True
2. False

Answer 3

a. True

Question 4

In a compound where is the energy found? (slide 6)

1. In the hydrogen atoms
2. In the electrons
3. In the chemical bonds
4. In the oxygen atoms

Answer 4

c. In the chemical bonds

Question 5

When a bond is , when a bond is :

1. [Formed energy is required], [broken energy is required]
2. [Formed energy is required], [broken energy is released]
3. [Formed energy is released], [broken energy is required]
4. [Formed energy is released], [broken energy is released]

Answer 5

b. [Formed energy is required], [broken energy is released]

Question 6

What is a catabolic reaction?

1. Where simpler molecules are combined into more complex ones
2. The sum of all chemical reactions in the body
3. Where energy is exchanged between molecules
4. Where a more complex molecule is broken down to a simpler one

Answer 6

1. Where a more complex molecule is broken down to a simpler one

Question 7

Catabolism requires: (slide 7)

1. Protein
2. Fat
3. Carbohydrate
4. Any of the above

Answer 7

d. Any of the above

Question 8

What is a metabolic pathway? (slide 8)

1. The route food takes through the digestive system
2. A series of reactions in metabolism where the products of one reaction are the substrates for the next
3. The pathway that results in the breakdown of complex molecules into simpler ones
4. The pathway that results in the formation of complex molecules from simpler ones

Answer 8

b. A series of reactions in metabolism where the products of one reaction are the substrates for the next

Question 9

What is glycolysis?

1. The metabolic process by which glucose is synthesised
2. The metabolic process by which glucose is stored
3. The metabolic process by which glucose is broken down
4. The metabolic process by which glycogen is stored

Answer 9

c. The metabolic process by which glucose is broken down

Question 10

What is gluconeogenesis?

1. The metabolic process by which glucose is synthesised
2. The metabolic process by which glucose is stored
3. The metabolic process by which glucose is broken down
4. The metabolic process by which glycogen is stored

Answer 10

a. The metabolic process by which glucose is synthesised

Question 11

What is the generic name of a substance that helps catalyse reactions? (slide 10)

1. Hormones
2. Enzymes
3. Substrates
4. Cell receptors

Answer 11

b. Enzymes

Question 12

The rate and direction of reversible reactions depends on:

1. The temperature
2. Relative concentration of reactants
3. Relative concentration of products
4. All of the above

Answer 12

d. All of the above

Question 13

What is a catalyst? (slide 13)

1. A substance which slows down the speed of chemical reactions without themselves being used up
2. A substance which increases the speed of chemical reactions but is also used up
3. A substance which slows down the speed of chemical reactions but is also used up
4. A substance which increases the speed of chemical reactions without themselves being used up

Answer 13

d. A substance which increases the speed of chemical reactions without themselves being used up

Question 14

What are enzymes?

1. Fats
2. Proteins
3. Carbohydrates
4. Gases

Answer 14

1. Proteins

Question 15

Enzymes help catalyse how many reactions?

1. Many different reactions
2. Just 2 reactions
3. One specific reaction
4. As many reactions as there are different reactants

Answer 15

1. One specific reaction

Question 16

Enzymes help to: (slide 14)

1. Increase activation energy
2. Reduce activation energy
3. Replace activation energy
4. Maximise activation energy

Answer 16

b. Reduce activation energy

Question 17

What is the active site on an enzyme?

1. The site on the enzyme where chemical reactions are facilitated
2. The site on the enzyme where only chemical bonds are created
3. The site on the enzyme where only chemical bonds are broken
4. The site on the enzyme where other enzymes can catalyse reactions

Answer 17

a. The site on the enzyme where chemical reactions are facilitated

Question 18

The two mechanisms responsible for short term regulation of enzyme activity are inhibition and regulation

1. Binding, isometric
2. Competitive, allosteric
3. Collaborative, isomer
4. Enzymatic, catalytic

Answer 18

b. Competitive, allosteric