Search our library of Biology questions

Top answers

Biology

All levels

Describe how the action of the mouth, oesophagus and stomach contributes towards the digestion of food? (6 Marks)

As this question is worth 6 marks, 6 different points need to be made to get all the marks. These could be two from each structure that is given. The teeth in the mouth break down food into smaller pieces...

Answered by Charlotte M. • Biology tutor

11866 Views

Cystic Fibrosis (CF) is a recessively inherited disorder. A father is a suffer of CF, while the mother is normal and not a carrier. What is the chance their child will be a carrier of CF? Give your answer as a percentage.

First write a key for the alleles. (normal Allele=T. CF allele=t) If the mother is normal= TT Father is a suffer =tt. Then Draw a punnet diagram for the child Write a key for the punnet diagram. TT-normal...

Answered by Natasha I. • Biology tutor

2429 Views

Explain how ATP is generated by oxidative phosphorylation.

Electrons and H+ ions are donated to the electron transport chain (located in the inner mitochondrial membrane) from NADH and FADH2 (generated during glycolysis, the Krebbs cycle and the Link reaction). T...

Answered by Katie O. • Biology tutor

7901 Views

Give the full balanced symbol and word equation for aerobic respiration

glucose + oxygen --> energy + carbon dioxide + water C6H12O6 + 6O2 ---> energy + 6CO2 + 6H20

Answered by Justine V. • Biology tutor

10561 Views

What is the cardiac cycle?

The cardiac cycle is the continual sequence of contraction and relaxation of the atria and ventricles to keep blood continually circulating around the body.

First the atria contract decreasing thei...

Answered by Emma R. • Biology tutor

5191 Views