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Give two ways in which the presence of synapses are advantageous to the nervous system.

They ensure unidirectional transmission - Nerve impulses can also pass from the pre-synaptic neurone to the post-synaptic neurone. This is due to the neurotransmitter being made in the pre-synaptic membra...

Answered by Lucy C. • Biology tutor

2367 Views

How does the cell divide?

The cell divides through four stages:ProphaseMetaphaseAnaphaseTelophase and CytokinesisBefore prophase the DNA, genetic material of the cell, is coiled and not visible. All that is visible is a dark patch...

Answered by Klara H. • Biology tutor

1373 Views

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...

Answered by Jake G. • Biology tutor

13717 Views

Describe the process of aerobic respiration.

Respiration is the process by which cells make energy. Aerobic respiration uses oxygen to make energy. Respiration involves a series of reactions.
The overall equation for the reaction is:Oxygen + G...

Answered by Madlen H. • Biology tutor

2865 Views

Describe the process of evolution by natural selection as developed by Charles Darwin in the 1800s.

Evolution by natural selection occurs when random mutations in the genome of an organism causes phenotypic traits (observable characteristics or traits) to be different between individual...

Answered by Jack W. • Biology tutor

2765 Views