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Biology
A Level

What is the difference between an allele and a gene?

A gene is a section of DNA coding for a specific protein. This protein will perform a certain function within the organism. You interit two forms of each gene, one from each parent. These are ...

YP
Answered by Yanina P. Biology tutor
4794 Views

What are the functions of the cell membrane?

The cell membrane separates the intracellular and extracellular environments. The lipid bilayer only allows small polar molecules (such as O2 or CO2), small hydrophobic molecules (fatty acids, steroid hor...

FD
Answered by Francesca D. Biology tutor
7630 Views

Using the Hardy Weinberg principle, calculate the frequency of the heterozygous genotype in the population if the frequency of the dominant allele p is 0.864. Express your answer as a percentage of the population.

p+ 2pq + q= 1.0

p + q = 1.0

1.0 - p = q 

1.0 - 0.864 = 0.136

q = 0.136

...
HC
Answered by Helen C. Biology tutor
8100 Views

Explain the difference between spatial and temporal summation at a synapse.

-Spatial summation occurs when multiple presynaptic neurones together release enough neurotransmitter (e.g. acetylcholine) to exceed the threshold of the postsynaptic neurone. For exam...

HC
Answered by Helen C. Biology tutor
202137 Views

Differentiate between sense and antisense codons?

Sence codons are used for synthesizing mRNA and are generated as complementary strand during DNA semi-conservative replication while Antisense codons are the template used for DNA replication and can't...

HB
Answered by HAMMED B. Biology tutor
14976 Views

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