Biology Year 13 Random Retrieval

We cannot see the proteins made by recombinant plasmids, nor the plasmids themselves. How do we know the bacteria have been transformed properly and contain a recombinant plasmid ( = plasmid and new gene fragment) ?

What is the difference between mRNA and pre-mRNA?

Was the cold winter an example of an abiotic factor or a biotic one?

An Ethiopian breed of cattle has low whey protein in its milk. This is controlled by a dominant allele (M). If 6 % of the herd have low whey protein, what proportion are heterozygotes?

What is an autosome?

What is the definition of 'genotype'?

On the diagram, which type of ion will D allow through when opened on an excitatory synapse?

Once an action potential has been generated, what causes the next section of the axon membrane to become depolarised?

Which ions are moving across the membrane during process '4'?

When an neurone axon is at rest, what charge is the extra cellular fluid compared to the cytoplasm?

• a) Simple Diffusion
• b) Facilitated Diffusion
• c) Active Transport

True or False : Fungi can increase the uptake of inorganic ions from the soil by a plant.

The diagram shows an Arctic food web. Why is the energy efficiency between Forbs and Rock Ptarmigan lower than that between a Rock Ptarmigan and an Arctic Fox?

a) Because more of the body of the Ptarmigan is eaten than the Frobs.

b) Because more of the Ptarmigan is digested and absorbed (assimilated)

c) Because a Ptarmigan is bigger than a Forbs

In the formula for the calculation of NPP, what does the 'R' stand for?

Which would be the most accurate method of sampling dry biomass?

Which of the following substances is NOT a co-enzyme?

Molecule B enters the Krebs cycle from the link reaction, what is it ?

A buffer was not used in the above experiment, what would happen to the pH during the experiment.

Name substance C

Which two products from the Light Dependent Reactions ( LDRs) does the Calvin Cycle use?

Name structure E