Biology Year 13 Random Retrieval

What do we call it if the restriction enzyme cuts both strands of DNA in the same place?

Which enzyme do we use to convert mRNA into cDNA?

Which type of mutation will not cause a frameshift?

Which component of a nucleotide contains nitrogen atoms?

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

What type of speciation is caused by a physical barrier between two populations such as a body of water?

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 number of sufferers of Tay Sachs in a Cajun population of 100,000 people?

In peppered moths, having light coloured wings is dominant. In Sheffield (an industrial northern town in the UK) a sample of moths was taken. The numbers collected were 73 light coloured , and 326 dark coloured. How many are heterozygotes?

What is the definition of 'genotype'?

Honey bees can detect the polarised light from the sun and use it to navigate even in cloudy weather. Is this taxis or kinesis?

The above diagram shows the Phosphorus cycle. Name type of organism which carries out process A?

True or False : Fungi can increase the surface area of roots

Denitrifying bacteria use nitrates in the soil to carry out respiration and produce nitrogen gas. Are the vast majority aerobic or anaerobic?

The diagram shows an Arctic food web. The arctic fox consumes a 35% share of the primary consumers, with the Gulls and skuas consuming 65%. The arctic fox achieves a 9% energy efficiency, from the total primary consumers productivity of 6,112kJ m^-2yr^-1. What is the productivity of the arctic fox?

What is the formula for NPP?

What is represented by molecule Y?

A single molecule of W is produced per turn of the Krebs cycle, and it carries hydrogen off to the ETC. What is it?

What is the net gain of molecule Z at the end of glycolysis?

What is the first process to happen in glycolysis?

In the above experiment, chloroplasts were isolated from plants grown at different light intensities. What is the saturation point of Normal plants grown in high light?