Top answers

Biology
A Level

What is an enzyme?

An enzyme is a protein catalyst

A catalyst is a substance which alters the rate of a chemical reaction. (So it can speed up a chemical reaction). 

The key...

LD
Answered by Lauren D. Biology tutor
11242 Views

How does MRI work?

MRI stands for magnetic resonance imaging and uses the application of a magnetic field and radio frequency photons to manipulate the spin state of protons (hydrogen nuclei). Hydrogen is one of the most...

SV
Answered by Sebastian V. Biology tutor
10148 Views

How does meiosis achieve genetic diversity?

Meiosis produces 4 haploid daughter cells and is essential for forming gametes that contain one copy of each chromosome. Meiosis allows genetic diversity which gives rise to new combinations of genetic al...

SG
Answered by Shannon G. Biology tutor
9772 Views

Describe how human gonads are under hormonal control.

Gamete production is controlled by hormones in humans. The hypothalamus produces Gonadotrophin-releasing hormone (GnRH) which in turn stimulates the anterior pituitary gland to produce leutinizing horm...

MF
Answered by Martin F. Biology tutor
5023 Views

Explain how DNA is converted into protein in eukaryotes.

DNA is a nucleic store of genetic information in eukaryotes. It consists of a combination of four different nucleobases; adenine, cytosine, guanine and thymine (abbreviated to A, C, G and T respectivel...

MF
Answered by Martin F. Biology tutor
7133 Views

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