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Biology

A Level

Describe and explain the process by which proteins are created from DNA

Firstly, the relevant DNA has to be unwrapped, because it is stored in a very tightly wrapped-up form to save space in the cell. The Hydrogen bonds between the two strands are broken, and the coding stran...

Answered by Charlie S. • Biology tutor

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Draw a diagram of a human cell, include; the Nucleus, the Golgi Apparatus, Lysosomes, Ribosomes and Mitochondria, annotating your diagram with the general functions of each component and of the cell membrane.

Nucleus: Contains the DNA/ Human genome in the form of chromosomes (with the help of histone proteins), within a nuclear membrane which is inpenetrable by cytosolic enzymes.

Golgi Apparatus: Transp...

Answered by Victoria T. • Biology tutor

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Explain what is meant by the term phenotype?

Expression of a genotype due to interaction with the environment

Answered by Laura P. • Biology tutor

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How do the different organelles in a eukaryotic cell work together to produce a hormone such as insulin?

Hormones are proteins. Each specific protein is made up of a specific sequence of amino acids. DNA in the nucleus codes for the specific sequence. This DNA is transcribed into mRNA which leaves the nucleu...

Answered by Sri Harsha D. • Biology tutor

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Some populations of animals that have never been hunted show very low levels of genetic diversity. Other than hunting, suggest two reasons why populations might show very low levels of genetic diversity.

Populations can still have low levels of genetic diversity if they have never been hunted. This can happen because the population is very small and isolated from other populations. Small populations may i...

Answered by Kelly J. • Biology tutor

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