Biology Year 13 Random Retrieval

Which enzyme can join two complementary sticky ends together during genetic modification?

If hypomethylation (reduced methylation) happens to a proto-oncogenes gene, what effect will this have on the rate of mitosis ?

What word describes when a mutation causes all the following triplet codes to be misread in a different frame?

Which of the following is a difference between prokaryotic and eukaryotic DNA?

Which of the following is NOT a difference between RNA and DNA?

True or false: Succession only happens on land?

True or false : Succession involves only the change of biotic factors ( Not abiotic).

Tay Sachs is a recessive disease which leads to the build up of certain lipids which eventually become toxic. The Cajun community in the USA has an incidence of about 1 in every 3,500 births. What is the allele frequency of the normal healthy genes?

What would be the genotype for a man with colour-blindness (b)?

Which of the following are features of slow twitch muscle fibres:

A)Lots of aerobic respiration
B)Lots of mitochondria
C)Low levels of myoglobin

Axons with a wider diameter axon have...

In the above diagram, which graph shows the correct effects of increasing a stimulus?

Stimulation ( either by a generator potential in a receptor cell or a neurotransmitter binding to a receptor on a postsynaptic membrane) caused which type of channel to open?

In the above experiment on woodlice, what is the Independent variable?

True or false : Taxis is a directional movement

Put the following into the correct order:

a) Lower plants die due to lack of photosynthesis.
b)Fish die due to lack of dissolved oxygen.
c) Decomposers respire aerobically to decompose the dead plant matter.
d) Increased algae blocks out the light.
e) Minerals leach into the waterway.
f) Increased minerals cause an algae to grow rapidly.

Which process can occur due to the actions of Nitrosomonas bacteria?

The diagram above shows anaerobic respiration in which type of organism?

What is represented by molecule C?

Using the information off the diagram, calculate the Rf value for carotene.