Biology Year 12 Random Retrieval

Which of the following will reduce genetic diversity in a population?

Which of the following is a mutagenic agent?

The goat cardiomyocyte has 30 pairs of chromosomes. How many chromatids will be present in each cell formed at the end of meiosis Telophase 2?

Before meiosis starts, the primary spermatocyte or oocyte replicates its chromosomes and organelles. What is this phase called?

What word describes cells which contain single chromosomes?

Name the structures labelled B

Which term best describes breathing?

A doctor vaccinated a group of patients against poliomyelitis. He gave each patient two doses of vaccine, 3 months apart. Calculate the percentage increase in the mean concentration of antibodies in blood between samples 2 and 3.

On the above diagram, where would an antigen bind?

True or false : Active transport can go down a concentration gradient, or up a concentration gradient.

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

a) The Concentration Gradient

b) The Surface Area

c) The Diffusion Pathway

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

Name the area where the sister chromosomes together, and attach to the spindle fibres here. (Spell it correctly)

Which type of electron microscope produced this image?

Which of the following has the smallest wavelength?

The image shows palisade cells in a leaf. Line B (length) in the image measures 3.5 cm, and the actual cell measures 7μm. What is the magnification of this image of the palisade cell?

What substance is layer B made out of?

Name the function of organelle A

ATP can be used to add a phosphate group onto molecules. What is this process known as?

The direction each DNA strand is facing is often called 5 prime (written 5') or 3 prime (written 3'). What does this refer to?