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Describe the various mechanisms by which expression of genes are controlled by the cell's environment.

One of the mechanisms within a cell’s own environment that plays a part in controlling the expression of genes is histone acetylation and de-acetylation. These are the processes by which the lysine residues ...
YJ
Answered by Yashoda J. • Biology tutor
2892 Views

Explain why there has been a large increase in antibiotic-resistant strains of bacteria.

An overuse of antibiotics means the non-resistant strains are killed, leaving less competition for the resistant-strains of bacteria, so they can mutate to reproduce more resistant strains of bacteria.
AM
Answered by Anna M. • Biology tutor
7645 Views

describe how kidneys filter blood?

Kidney filters blood via ultrafiltration filters small particles of blood out such as sugar salts water and urea. Large particle such are red blood cells and white blood cells stay in blood. Filtrate moves i...
AS
3217 Views

How would you define the differences between type 1 and type 2 diabetes?

In type 1 diabetes, there is an impairment in making insulin. Diagnosis usually occurs among young people. In type 2 diabetes there’s an impairment in cells responding to insulin. Diagnosis usually occurs in...
SL
Answered by Stevie L. • Biology tutor
2957 Views

Why do plant shoots grow towards sunlight?

Auxins are a hormone in plants that is mainly produced in the tips of shoots and roots. High concentration of auxins in the shoot causes cells to grow more, whereas a high concentration in the root causes ce...
FA
Answered by Fareeha A. • Biology tutor
8039 Views