Feb Mock test reflection Flashcards
Polymers are ______ units
Repeating
When is an unpaired T-test used ?
An unpaired t-test is used to compare the mean between two independent groups.
You use an unpaired t-test when you are comparing two separate groups with equal variance.
where Is water transported in a plant from the roots
basic
From roots to cells
xylem contain _____________ pits
Non-Lignified
water is a _____ molecule
Polar
WHat variables should be controled In an investigation into osmosis in plant cells, specifically in potatoes
why
-Temperature
Because it effects the rate of diffusion
-Type of potato
Different density/water potential
-Ensure enough solution to fully submerge potato cylinders
So osmosis occurs across the whole surface of the potato cyinder
WHat variables should be controled In an investigation into osmosis in plant cells, specifically in potatoes
why
-Temperature
Because it effects the rate of diffusion
-Type of potato
Different density/water potential
-Ensure enough solution to fully submerge potato cylinders
So osmosis occurs across the whole surface of the potato cylinder
What happens to the different to the components of the sliding filament model when contracted
- I band smaller
-A band stays the same
-H zone shorter
-Z lines closer
-Sarcomere shorter
-Greater overlap between actin and myosin
Suggest why lack of ATP leads to muscle rigidity
-ATP required to break down cross bridges
-Actin and myosin remain cross linked
-Prevents relaxation of muscle
How is Q10 value calculated
R2/R1
Highest rate/lowest rate
Explain why a patient with a pituitary tumor have adrenal failure but still respond normally to situations of danger and excitement
Pituitary tumor can stop ACTH production
-ACTH only effects adrenal cortex
-Adrenaline is produced by medulla
-Adrenaline is responsible for response to danger
-F or F response is also maintained by nervous system
what is meant by pluripotent
-Can differentiate into any cell type
-Cannot form whole organisms
Scientists concluded that human iPCs (artificially transformed stem cells) would be safer than using human ESCs (embryonic stem cells) to treat hypothyroidism
Evaluate this claim
(+) Less / no risk of rejection
(-) May have accumulated mutations
(-)iPSCs may increase risk of cancer
(-) May still carry allele for hypothyroidism
