Test Flashcards
(12 cards)
Importance of:
High heat capacity in water
High latent heat of vaporisation
- It buffers the changes in temperature
- Provides a cooling effect through evaporation
Translation
mRNA attaches to a ribosomes and an amino acid is brought over by tRNA which complementary binds to mRNA via its anticodon. The ribosome then moves along the strand resulting in more amino acids being bonded together by peptide bonds with the use of ATP. This repeated until a stop codon is enountered resulting in the ribosomes detaches releasing the polypeptide chain
Water cohesion theory
Water evaporates through the leaves via transpiration and causes a negative pressure within the xyle. This results in the water moving upwards and water molecules sticking together due to their hydrogen bonds making the molecules cohesive.
The solution used to dilute the blood has to have the same water potential. Why
Since they have the same water potential osmosis would not occur therefore the red blood cells wouldn’t undergo cytolysis
Transfusion from blood group a to b would cause agglutination why?
The antigen a would bind to the anti-a in blood group b creating agglutination.
Cell fractionation and ultracentrifugation to obtain mitochondria from muscle tissue
Using a cold, buffered and isotonic solution, blend the tissue and filter it through. Place it into the centrifuge at a low speed and remove the supernatant created. Place the supernatant back into the centrifuge at a higher speed. The solution created should contain mitochondria at the top and another supernatant
Gene coding analysis to determine phylogenetic relationships
Common ancestors can be identified through looking at their nucleotide sequencing since the more common ancestors would have similar sequences
Benefits of:
Reaching the upper branches of trees
- Only opening stomata at night
Stomata - to reduce water loss
Thin layer
To allow light to pass through the sample
Name a type of chromosome mutation which would result in the extra chromosome
Chromosomes didn’t seperate
Explain how a VSD can cause higher blood pressure in the lungs
More blood moves to the right ventricle from the left ventricle since it has a thicker muscle therefore a higher blood pressure is in the pulmonary artery
Role of haemoglobin
Binds oxygen in the lungs which makes the binding of another oxygen molecule easier.
Oxygen is transported in the red blood cells via oxyhaemohlobin
