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Biology
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In what ways can a point mutation affect the protein encoded for by a gene?

Point mutations can affect a protein in various ways, depending on the type of point mutation that has occurred. Substitution mutations can be silent, causing no change in...

Answered by Ryan M. Biology tutor
1333 Views

Briefly describe the key differences and similarities between Prokaryotic and Eukaryotic Cells

DifferencesProkaryotes are much smaller than eukaryotic cells. Prokaryotic cells are 0.5-5 microns in diameter compared to eukaryotic cells which are approx 50-100 microns. Another differ...

Answered by Oliver W. Biology tutor
8021 Views

Describe how oxygen in the air reaches capillaries surrounding alveoli in the lungs. Details of breathing are not required. (AQA Biol. 2016)

Oxygen diffuses from the air where it is present at a higher concentration and pressure, to the lungs where it is at a lower concentration and pressure - we say it moves 'down' these gradients; high to lo...

Answered by David M. Biology tutor
3308 Views

Explain how you may test a plant specimen for starch?

This can be done via the iodine test- you would use an iodine solution and pipette this unto the plant cutting. For a positive test, the specimen would turn into a blue/ black colour in the presence of io...

Answered by Isabella M. Biology tutor
2142 Views

Draw a punnet square between two carriers of cystic fibrosis and from this, work out the odds of their child being affected with CF.

I will draw the punnet square on the whiteboard. After drawing it, the ratio of CC:Cc:cc will be 1:2:1 As a recessive gene, only people with the homozygous recessive genotype (cc) will have cystic fibrosi...

Answered by Maddie B. Biology tutor
2668 Views

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