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Biology
A Level

Describe the structure of a DNA molecule and explain how this relates to its function.

DNA is made up of two nucleic acid strands joined by hydrogen bonding. Nucleic acids are polymers made up of many nucleotide monomers linked together by phosphodiester bonds. This type of bond is a covale...

EO
Answered by Emily O. Biology tutor
64476 Views

Biology AQA Past Paper (2015) - Topic 7. Ecology: What is eutrophication?

Eutrophication is an enrichment of water by nutrient salts that causes structural changes to the ecosystem such as: increased production of algae and aquatic plants (algal blooms), depletion of fish speci...

DM
Answered by Diego M. Biology tutor
3189 Views

What is the tertiary structure of a protein?

The tertiary structure of a protein is the final folding of a protein into its final shape. It involves interactions between the R-groups of the amino-acids in the polypeptide chain. These interactions ar...

SS
Answered by Shiv S. Biology tutor
5328 Views

what is the structure of a photosystem?

Photosystems sit in the thylakoid membrane of chloroplasts. There job is to capture light energy and convert it into energy that can be used by the plant to eventually create ATP. Photosystems are made up...

MF
Answered by Matthew F. Biology tutor
16810 Views

examiners can ask us to design an experiment in order to explore an aspect of ecology. How would I go about doing this?

  1. Name the exact type of equipment used i.e. belt or line transect; frame, open or point quadrat. The answer to this will relate to the aims of the study. Trancsects are useful for studying change...

MF
Answered by Matthew F. Biology tutor
2320 Views

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