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Explain the process of transcription in living cells

Transcription factors together with enzymes such as DNA topoisomerase and DNA helicase reach the gene of interest. These enzymes uncoil the DNA and revelea the two strands of DNA that are wrapped around h...

Answered by Tutor88643 D. • Biology tutor

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What is ATP? Explain its structure, synthesis and function.

ATP, which stands for adenosine triphosphate, is a biomolecule formed by a purine base (adenine), a sugar molecule (ribose) and three phosphate groups. Its main function is to store energy within the cell...

Answered by Alba R. • Biology tutor

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Charles Darwin found that finches from different islands had different sized beaks. Explain why one island may have finches with large short beaks and another may have finches with long thin beaks.

The differences in the birds' beaks are due to evolution and natural selection. One island may have an abundance of seeds and nuts which require a large beak to crack them open, meaning that birds with a ...

Answered by Poppy B. • Biology tutor

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What types of infectious agents are there?

Bacteria (prokaryotes) 1-5 micrometers, contain RNA and DNA, can synthesise and metabolise protein, generally free livingMajority are harmless, but a certain small list can cause infectious diseasesOne of...

Answered by Adam T. • Biology tutor

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Explain how allopatric speciation can lead to the formation of 2 species from an ancestral species?

The ancestral species is split into two populations by a geographic barrier, which prevents gene flow. Mutations arise which causes genetic variation between the populations. There are different environme...

Answered by Seb H. • Biology tutor

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