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Can you describe the structure of the DNA MOLECULE?

The Dna molecule is an antiparallel double helix made up of a sugar, a phosphate group and different bases pared with each other. These basis are Adenine (A), Guanine (G), Cytosine (C) and Thymine (T) and ar...
SM
Answered by Sara M. • Biology tutor
6727 Views

What are the four chambers of the heart and which side receives/delivers oxygenated or deoxygenated blood?

The four chambers of the heart are the upper two atria (atrium for singular) and the lower two ventricles. The atria first receive the blood, which is then pumped to its destination via the ventricles. They ...
JB
Answered by James B. • Biology tutor
4008 Views

What does bile do?

When we eat a meal, the food passes down a long 'food tube' that runs from the mouth to the anus. Food reaches the stomach by passing along part of this 'food tube' called the oesophagus. Once the food gets ...
KW
Answered by Kimberley W. • Biology tutor
36570 Views

Describe the roles of calcium ions, ATP and phosphocreatine in producing contraction of S (b) a muscle fibre.

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BF
Answered by Bertie F. • Biology tutor
4697 Views

Can you describe the path of electrical conduction through the human heart?

Special cells make a patch in the right atrium known as the sino-atrial node (SA node), these cells can depolarise themselves! When these cells depolarise, they cause depolarisation of cells nearby, these si...
AE
Answered by Alex E. • Biology tutor
4204 Views