Top answers

Contrast the processes of facilitated diffusion and active transport (3 marks)

Note that the question is 3 marks. Also note the question uses the word 'contrast' so you must talk about both processes. Cells must communicate with their external environment and vice versa, therefore, sub...
Answered by • Biology tutor
7704 Views

Name 3 effects that the sympathetic nervous system has on human physiology?

Constriction of blood vessels Dilation of pupils Slows down digestion
BV
Answered by BARIBEFE V. • Biology tutor
2844 Views

How does Natural Selection occur?

In the population of a species there will always be a selection pressure (new predator/competitor/ presence of disease) There is genetic variation within the population so new alleles can arise due to random...
Answered by • Biology tutor
2980 Views

How does DNA replication work?

DNA replication is called semi-conservative, because each original strand is used to create a new strand. In order to do this, first we need to separate the two strands: they are unwound and unzipped by the ...
ET
Answered by Ellie T. • Biology tutor
4595 Views

Describe the process of DNA replication

DNA replicates via semi-conservative replication . This means one strand acts as the template strand. The enzyme DNA Helicase breaks the hydrogen bonds between base pairs in DNA. This unwinds the DNA, exposi...
JD
Answered by Joanna D. • Biology tutor
3182 Views