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Biology
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Describe how the hormones FSH, oestrogen and LH are involved in the control of the menstrual cycle

FSH stimulates oestrogen productionoestrogen inhibits FSH and stimulates LH /LH stimulates egg release

Answered by Rabia D. Biology tutor
3411 Views

Prokaryotic DNA is smaller than eukaryotic. Please give two other ways prokaryotic DNA differs from eukaryotic.

  1. Circular2) Polycistronic (genes can be expressed together)3) No introns/no splicing of genes4) Does not form chromatin (although explain to student that this is an oversimplification, prokaryotes do...
Answered by Duncan W. Biology tutor
2350 Views

Describe the structure of DNA.

DNA (deoxyribonucleic acid) is a polymer made up of two nucleotide chains held together by hydrogen bonding between nucleotides in a double helix shape.
A nucleotide is made up of a deoxyribose sugar...

Answered by Sim B. Biology tutor
5068 Views

Explain the lock and key enzyme hypothesis

Enzymes are specific: meaning that an enzyme's active site is complementary to a particular substrate. In the lock and key hypothesis, a substrate that is complementary to the enzyme binds to the enzyme's...

Answered by Noor A. Biology tutor
5153 Views

what are three main functions of the human liver?

  1. detoxification: liver cells contain enzymes which break down toxins for example catalase, this enzyme is responsible for converting toxin hydrogen peroxide into water and oxygen. enzymes can detoxif...
Answered by Megan B. Biology tutor
2240 Views

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