Biology Year 12 Random Retrieval

The Amish in America are a closed community, which only reproduce with-in their own population. They are descended from 200 Swiss who migrated there. They have a much higher proportion of alleles which cause genetic disorders, rarely seen in the rest of the population. What is this an example of?

True or false : The Founder Effect is a type of genetic drift?

What type of mutation is this ? ACCTGG becomes ACGTGG

On this diagram, what does C represent?

In an homologous pair of chromosomes...

In an homologous pair of chromosomes, would alleles be...

If a small tube is inserted into the phloem through the bark of a tree, sap containing sucrose leaks out. Where on the tree will the most sap leak from due to the highest hydrostatic pressure?

Which muscles contract when you exhale at rest?

Cresol red is an indicator which goes clear at a low pH. A plate of agar jelly with cresol red added was made, and two blocks were cut out. Block A measured 10mm x 10mm x 10mm. Block B measured 20mm x 7mm x 7mm. Are the two agar blocks a similar surface area (within 5% difference)?

Which is an example of a behavioural adaptation which allows an animal to live at hotter temperatures?

Multicellular organisms cannot absorb enough substances by diffusion. Why is this?

Does a concentration gradient need to be established before facilitated diffusion can take place?

Which of the following factors when increased, will increase the rate of diffusion?

a) The Concentration Gradient

b) The Surface Area

c) The Diffusion Pathway

Which molecule makes up part D?

True or False : Prokaryotic ribosomes are the same as eukaryotic ribosomes

What is the main function of this organelle?

What name is given to the DNA fragments labelled C in the diagram?

How do you reduce the effect of a competitive inhibitor?

What is the area of an enzyme called where the substrate binds?

This polysaccharide of glucose is branched. What is the advantage to the organism of branching ?