Top answers

Describe how a gene is used to synthesise a polypeptide

A gene is a section of DNA used to produce a single polypeptide, or protein molecule, which is made of amino acids. The process of protein synthesis can be divided into two parts. The first part is transcrip...
LW
Answered by Lucy W. • Biology tutor
28946 Views

Explain the difference between Lamarck’s and Darwin’s theory of evolution? Why was Darwin’s more successful?

Darwin and Lamarck were both scientists who tried to understand evolution. Lamarck Lamarck’s theory of evolution was based around how organisms (e.g. animals, plants) change during their lifetime , then pass...
TH
Answered by Ted H. • Biology tutor
440555 Views

Describe the synaptic transmission of nerve impulses.

The nerve impulse arrives at the pre-synaptic knob. Gated voltage-sensitive calcium ion channels open and calcium ions rapidly diffuse into the pre-synaptic knob. The influx of calcium ions stimulates synapt...
MG
Answered by Megan G. • Biology tutor
13193 Views

How does deforestation lead to reduced soil fertility?

Logging and subsequently harvesting trees removes nutrients, like phosphates, from the system. The removal of the vegetation that would also normally act as a protective cover and windbreak increases the rai...
MG
Answered by Megan G. • Biology tutor
42081 Views

What is Linkage?

Linkage occurs when the genes for two different characteristics are found on the same chromosome. This means that they do not independently assort during metaphase one of meiosis and so pass into gametes tog...
MG
Answered by Megan G. • Biology tutor
33065 Views