MOCK Flashcards
Compare oxygen consumptions
Per gram
Compare mass variations
Explain how an increase in the iguanas body temperature affects its oxygen consumption when it’s at rest
Increased temp increases reactions
Increased kinetic energy
More ATP
O2 consumption w/respiration
Describe how movements of the iguanas between sun + shade are related to body temperature
Further away from optimum = greater movement
No movement at optimum
Behaviour of desert iguanas keeps body temp within a range - how
Move between sun + shade
How does panting reduce body temperature
Evaporation of water
Takes heat energy away from surface
Transferred from blood
One reason for use of impermeable glass barriers
Prevents sideways movement of IAA
Affect of unilateral light on IAA
Light doesn’t change IAA
D - unchanged - movement in tip
C- moment in too not agar blocks
Cut seedlings form in sucrose solution rather than distilled water - why
Used in respiration as an energy source
Effect of blue light on growth of seedlings P+Q
Inhibits growth of sucrose solution
Greater effect on P
Explain how IAA is taken up by the cells of this fungus
Uptake by active transport
Heat kills wild type has no uptake
Suggest How mutation affected the cells of this fungus
Mutation increases frequency of hydrogen pumps
Increased uptake of IAA without DNP
DNP reduces uptake by mutant cells
Explain - when light falls on cells 2 and 3 two spots of light are seen
1 + 2 share a neurone
2 + 3 share no similar neurone
One unit of light energy falls on cell 3, one unit falls on cell 4 and one falls on cell 5, light is seen
1 unit sub-threshold 3 units above threshold = depolarization No action potential in sensory neurone Spatial summation
Causes colour vision in fovea
3 types of cone cells - types 6+7 sensitive to different wavelengths/frequencies/colours
Causes fovea to have high visual acuity
Impulses sent along separate neurone from each receptor cell
Explain rise in concentration of glucose between 07:00 and 08:00
Glucose digested and absorbed into bloodstream
Concentration of glucose in blood fell between 08:00 and 09:0 why
Taken up by cells used in respiration
Converted into glycogen
Role of hormones in fluctuation of glucose concentration between 09:00 and 12:00
Glucagon secreted - stimulates breakdown of glycogen to glucose
11-12 insulin secreted - stimulates uptake of glucose
Describe role of FSH in menstrual cycle
Stimulates growth of follicle
Stimulates production of oestrogen
Explain how the structure of FSH accounts for this specific targeting
Tertiary shape
Receptor complimentary binding
Name hormones p + q
P - progesterone
Q - oestrogen
Explain why blood of post-menopausal women contains high levels of FSH
No inhibition or negative feedback of FSH by oestrogen
What does degenerate mean
One amino acid codes for more than one triplet
What is a codon
Three bases on mRNA
What is the role of RNA polymerase during transcription
Join nucleotides together to form pre-MRNA
