Top answers

Describe the loading and unloading of oxygen by Haemoglobin in red blood vessels

Haemoglobin is a protein consisting of four haem groups contained in four polypeptide chains. The loading of oxygen consists of oxygen binding to iron in the haem group at areas of higher oxygen concentratio...
Answered by • Biology tutor
17698 Views

Give two features of DNA and explain how each one is important in the semi-conservative replication of DNA.

DNA has a number of important features that allow semi-conservative replication to take place. These include:1. DNA bases are held together by weak hydrogen bonds between bases that can be easily broken, all...
AM
Answered by Alex M. • Biology tutor
17972 Views

What is the resting membrane potential and how is it established?

In resting axons, the inside of the cell is more negative than the outside of the cell. This potential difference has a value of -60 to -70mV and is very important in the transmission of impulses. This poten...
Answered by • Biology tutor
3970 Views

Describe the process of transcription.

Transcription is the process of using DNA from the nucleus of a cell as a template to synthesise mRNA (messenger RNA). An enzyme called DNA helicase unwinds and unzips the DNA at the start of the gene (calle...
SC
Answered by Stephan C. • Biology tutor
3918 Views

What is the function of coronary arteries?

The function of coronary arteries is to carry oxygenated blood to the myocardium (heart muscle).
Answered by • Biology tutor
3846 Views