AQA Biology A-Level - Paper 2

When individuals of different species compete for resources:

What happens during glycolysis?

What is ammonification?

What is bioinformatics:

What happens during oxidative phosphorylation?

Type 1 diabetes is due to glycoprotein receptors losing responsiveness to insulin or an inadequate supply of insulin

The loss of a nucletoide base from a DNA sequence:

What is speciation?

What are the differences between rod and cone cells?

Anaerobic respiration in plants, SOME microorganisms and animals:

Which cells in the islets of Langerhans produce insulin?

Speciation where two populations become geographically separated:

Preserves the average phenotype by favouring average individuals:

Cloning by transferring fragments to a host using a vector:

What is dentrification?

What happens in the light-independent reaction (Calvin Cycle)?

What is a Pacinian corpuscle?

Where an organism lives an what it does there:

pioneer species - climax community

Pluripotent stem cells:

What is nitrification?

One or more bases are repeated:

A group of bases is separated from the DNA sequence on a chromosome and become inserted into that of another chromosome:

What are podocytes?

Why can some alleles only be expressed by one gender?

The electrical excitation from the SAN does not affect the ventricles due to a layer of non-conductive tissue.

What occurs in the phosphorous cycle?

Fast-twitch fibres contract more rapidly for a short period and are adapted to intense exercuse because?

What happens in the light-dependent reaction?

Which terms are associated with control of heart rate?

What is nitrogen fixation?

Molecules that can switch on genese and move from the cyoplasm into the nucleus:

Action Potential (Repolarisation - 70mv - 40mv - 70mv)

What three things affect the speed of an action potential?

Describe the two protein filaments that make up myofibrils:

Which statements are correct?

What is carrying capacity?

The total number of all the alleles of all the genes of all the individuals within a population at a given time:

What happens in the Krebs cycle?

What are totipotent cells?

Multipotent stem cells:

A nucleotide in a section of a DNA molecule is replaced by another that has a different base:

Individuals of the same species competing for resources:

What is it called when a gene has more than two alleles?

Single nucleotide polymorphisms:

Favours individuals with extreme phenotypes rather than those with phenotypes around the mean:

An extra base becomes inserted into the DNA sequence:

What is autosomal linkage?

What is epistasis?

What does photosynthesis require and produce?

Where does the light-independent phase of photosynthesis take place?

What is the refractory period?

What are the purposes of the refractory period?

Slow-twitch fibres contarct slowly and are more adapted to endurance work because?

What is sex linkage?

A group of bases separated from the DNA sequence and rejoin at the same position but in the inverse order:

Which of these are formulas for the Hardy-Weinberg principle?

High energy ionising radiation and chemicals are:

What happens in the link reaction?

Myofibrils are striped due to alternating bands. Light I bands and dark A bands.

Which cells in the islets of Langerhans produce glucagon?

Which of these are conditions of the Hardy-Weinberg principle?

Cloning using the polymerase chain rection:

Environmental factors that limit the population of a species:

A technique where DNA is cut into small sections and computer algorithms are used to assemble the entire genome:

Resting Potential

Speciation that occurs within a population in the same area that results in them becoming reproductively separated:

Enviromental factors can cause heritable changes in gene function without changing the DNA base sequence:

Whihc of the following can stem cells be found in?

Unipotent stem cells:

Define saltatory conduction:

Where does the light-dependent phase of photosynthesis take place?

Muscles can only pull and so act in antagonistic pairs

Each A band has a lighter coloured region called the H-zone. Each I band has a line called a Z-line.

Changes the phenotypes of a population by favouring phenotypes that vary in one direction from the mean:

Totipotent stem cells: