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Determine the Michaelis-Menten constant from a graph. Compare the affinities of two enzymes that have different Km values. Explain how a competitive inhibitor works and influence Km and Vmax values.

(a) First of all, we have to determine V max by using the graph provided. Try drawing a straight line parallel to the x-axis that is very close to the graph and almost seems to touch it. This is called an as...
NE
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How do cholinergic synapses communicate with each other (5)

Acetycholine released from presynaptic neurone2) Acetylcholine diffuses down its concentration gradient and attaches to receptors on postsynaptic neurones3) This causes sodium channels to open on the post sy...
MV
Answered by Mohit V. • Biology tutor
2746 Views

Measles, mumps and rubella (MMR) are dangerous diseases that can be fatal to children. The MMR vaccine is given to children at a young age to produce antibodies against these diseases. Describe how giving the vaccine leads to the production of antibodies.

The vaccine contains weakened or dead antigens (from MMR). These antigens are displayed on antigen-presenting cells which are detected by a specific helper T cell. This stimulates a specific B cell which div...
GB
Answered by Gracie B. • Biology tutor
2530 Views

What is transpiration and what factors affect its rate of occurrence? Describe some adaptations of xerophytic plant that reduce water loss via transpiration.

Transpiration is the evaporation of water through open stomata, occurring down the water potential gradient.Factors affecting the rate of transpiration:Light intensity - more stomata will be open to take in ...
JT
Answered by Jessica T. • Biology tutor
14087 Views

What is the difference between sister chromatids and homologous chromosomes?

This might be a bit tricky sometimes, but there is a main difference between those two that is crucial and not so hard to remember. Sister chromatids are formed during DNA replication therefore they are iden...
KB
Answered by Karolina B. • Biology tutor
48524 Views