Top answers

Biology
A Level

Each amino acid contains a different R group specific to the amino acid. Describe how the R group of an amino acid contributes to the tertiary structure of a protein. (4 marks)

Cysteine contains an S atom in its R group. Where 2 molecules of cysteine are found together, strong covalent bonds or "disulfide bridges" can form between the two S atoms (S=S). R...

JG
Answered by Jake G. Biology tutor
19870 Views

Describe and explain the role of inspiratory and expiratory muscles during normal breathing

The main muscle of normal quiet breathing is the diaphragmDuring Inspiration, it contracts which causes it to flatten. This increases the volume of the thoracic cavity and so the pressure decreases. This ...

SD
Answered by Symran D. Biology tutor
2950 Views

How does the Calvin Cycle work?

To answer this question, I would definitely use a diagram so that they can clearly see that this is a cycle and it will probably then use the diagram to explain each step. The Photosynthesis equation CO2 ...

EK
Answered by Elva K. Biology tutor
6862 Views

What is a phospholipid and how does it form part of the cell membrane?

The cell membrane is a complex material made up of three main components: the phospholipid bilayer, proteins, and cholesterol. The tadpole-shaped phospholipid is made up of a phosphate head attached to a ...

JC
Answered by Joseph C. Biology tutor
4501 Views

What is the Hardy-Weinberg equation and what is it used for?

The Hardy-Weinberg equation is a model predicting allele frequency in an population, under the assumption that the frequency of alleles in a population does not change and will contribute...

JC
Answered by Juliet C. Biology tutor
4679 Views

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