MOCK

Question 0

Compare oxygen consumptions

Answer 0

Per gram

Compare mass variations

Question 1

Explain how an increase in the iguanas body temperature affects its oxygen consumption when it’s at rest

Answer 1

Increased temp increases reactions
Increased kinetic energy
More ATP
O2 consumption w/respiration

Question 2

Describe how movements of the iguanas between sun + shade are related to body temperature

Answer 2

Further away from optimum = greater movement

No movement at optimum

Question 3

Behaviour of desert iguanas keeps body temp within a range - how

Answer 3

Move between sun + shade

Question 4

How does panting reduce body temperature

Answer 4

Evaporation of water
Takes heat energy away from surface
Transferred from blood

Question 5

One reason for use of impermeable glass barriers

Answer 5

Prevents sideways movement of IAA

Question 6

Affect of unilateral light on IAA

Answer 6

Light doesn’t change IAA
D - unchanged - movement in tip
C- moment in too not agar blocks

Question 7

Cut seedlings form in sucrose solution rather than distilled water - why

Answer 7

Used in respiration as an energy source

Question 8

Effect of blue light on growth of seedlings P+Q

Answer 8

Inhibits growth of sucrose solution

Greater effect on P

Question 9

Explain how IAA is taken up by the cells of this fungus

Answer 9

Uptake by active transport

Heat kills wild type has no uptake

Question 10

Suggest How mutation affected the cells of this fungus

Answer 10

Mutation increases frequency of hydrogen pumps
Increased uptake of IAA without DNP
DNP reduces uptake by mutant cells

Question 11

Explain - when light falls on cells 2 and 3 two spots of light are seen

Answer 11

1 + 2 share a neurone

2 + 3 share no similar neurone

Question 12

One unit of light energy falls on cell 3, one unit falls on cell 4 and one falls on cell 5, light is seen

Answer 12

1 unit sub-threshold 
3 units above threshold
= depolarization 
No action potential in sensory neurone
Spatial summation

Question 13

Causes colour vision in fovea

Answer 13

3 types of cone cells - types 6+7 sensitive to different wavelengths/frequencies/colours

Question 14

Causes fovea to have high visual acuity

Answer 14

Impulses sent along separate neurone from each receptor cell

Question 15

Explain rise in concentration of glucose between 07:00 and 08:00

Answer 15

Glucose digested and absorbed into bloodstream

Question 16

Concentration of glucose in blood fell between 08:00 and 09:0 why

Answer 16

Taken up by cells used in respiration

Converted into glycogen

Question 17

Role of hormones in fluctuation of glucose concentration between 09:00 and 12:00

Answer 17

Glucagon secreted - stimulates breakdown of glycogen to glucose
11-12 insulin secreted - stimulates uptake of glucose

Question 18

Describe role of FSH in menstrual cycle

Answer 18

Stimulates growth of follicle

Stimulates production of oestrogen

Question 19

Explain how the structure of FSH accounts for this specific targeting

Answer 19

Tertiary shape

Receptor complimentary binding

Question 20

Name hormones p + q

Answer 20

P - progesterone

Q - oestrogen

Question 21

Explain why blood of post-menopausal women contains high levels of FSH

Answer 21

No inhibition or negative feedback of FSH by oestrogen

Question 22

What does degenerate mean

Answer 22

One amino acid codes for more than one triplet

Question 23

What is a codon

Answer 23

Three bases on mRNA

Question 24

What is the role of RNA polymerase during transcription

Answer 24

Join nucleotides together to form pre-MRNA