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Biology
IB

If someone has blood type A+: which are his possible genotypes and who can he donate blood to?

The ABO blood type system relies upon the co-dominant alleles IA and IB, which are expressed any time they are present and are dominant over i which is recessive. If someone has bloo...

FT
Answered by Francisco T. Biology tutor
40687 Views

Outline the role of insulin and glucagon in the regulation of glucose and outline type 1 and type 2 diabetes.

Relevance: Body needs to make glucose for ATP production. (Energy production)Regulation:Both hormones insulin and glucagon are released from the islets of Langerhan in the pancreas.Insulin: Released from ...

SK
Answered by Shantanu K. Biology tutor
1865 Views

State the cell theory and briefly describe 3 exceptions.

The cell theory states that:All living organisms are composed of cells (unicellular or multicellular)The cell is the smallest unit of lifeAll cells come from the division of pre-existing cellsExceptions:S...

KP
Answered by KYRIAKI P. Biology tutor
5742 Views

Explain how a nerve impulse passes along a neuron (8 marks)

Neurons transmit electrical impulses. Electrical impulses are action potentials propagated along the axons of neurons from one end to another. At a resting potential, sodium-potassium pum...

JW
Answered by Jessica W. Biology tutor
18864 Views

Explain the role of enzymes in the process of DNA replication in prokaryotes

A variety of enzymes are involved in the process of DNA replication. For replication to occur each strand of DNA must be separated from the other, a result of its double helix structure and the hydrogen b...

HJ
33317 Views

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