2018 P2 Flashcards
Why decrease in light dependent reaction decreases the light independent reaction
Less ATP
Less reduced NADP
Why a decrease in enzyme rubisco would limit rate of photosynthesis
Less CO2 reacts with RuBP
Less GP produced
Where is rubisco found in a cell
Stomata of chloroplast
Use information = does heat stress reduce the activity in plant leaves by affecting rubisco activase
Rubisco activity increases with temp
Rubisco activase activity decreases at high temp
Suggests activase doesn’t affect activity of rubisco
Result only for cotton
Results for isolated enzyme
No stats test
Why did the student left the apparatus for one hour after he yeast culture reached a constant temperature
So the oxygen is used
Why did the coloured liquid moved to the right
Anaerobic respiration produces CO2 gas increases volume of gas
Explain why a log scale is used
Large range in numbers
Why do Many yeast cells die during the death phase
No substrate
Increase in acidity
How would you determine mean percentage cover for beach grass on a sand dune
Divide area into squares Use a random number generator to select squares Place quadrants here Large sample size Find % cover Divide total % by number of sample s
We’re the results due to succession
Beach grass is pioneer species
Pioneers change environment
So its less hostile for shrubs - eg conifers
Conifers and hardwood = climax community
Why does % sunlight reaching ground reduce
Trees block sunlight
What can you conclude about the NPP in the sand dunes that are older than 1000 years
NPP remains constant
GPP + respiration constant
Why observed phenotype ratios obtained are not Sam as expected
Small sample size
Epistasis
What genotype off offspring with dwarf and mottled leaves
=ttmm
Explain results in table 3
Genes are linked
Produced fewer tall+ mottled and dwarf+normal offspring
Crossing over has occurred
