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Biology

A Level

How do I get full marks for this question "Describe how a vaccination leads to antibody production" ?

Mark 1: What is a vaccine?A vaccine contains antigens from an inactive form of a specific pathogen.
Mark 2: Which cells are first to respond to the antigen?Anti...

Answered by Chloe T. • Biology tutor

2627 Views

A patient is infected by a pathogen. Explain the process of the imitation of the immune response (5 marks) The paitent was prescribed antibiotics yet their symptoms did not improve. What can you infer from this? (1 mark)?
5 of the following...
Pathogen has antigens on its surface that are recognised as foreign by the immune system
T helper cells stimulate cytotoxic T cells, B cells and phagocytes (or lysosomes)
HF
Answered by Harriett F. • Biology tutor
2364 Views
Explain the steps of action potential across an axon membrane?
Resting Potential-3 Na+ out, 2 K+ in.Action potential- A stimulus is detected causing Sodium voltage gated channels to open, leading to Na+ to flow into the axon and therefor making the inside less negati...
IJ
Answered by Isabelle J. • Biology tutor
2687 Views
Why is DNA replication semi-conservative?
DNA is in a double helix structure, meaning there are two strands. When we need DNA to replicate, for example when a cell divides during growth, the strands undergo unwinding. This process is done by an e...
EC
Answered by Emma C. • Biology tutor
4624 Views
What is the difference between mitosis and meiosis?
Mitosis is the process used by normal body cells for everyday replication to maintain a healthy body, for example tissue regeneration. On the other hand, meiosis is the process whereby the gametes, sperm ...
CG
Answered by Clare G. • Biology tutor
3236 Views
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Top answers

How do I get full marks for this question "Describe how a vaccination leads to antibody production" ?

A patient is infected by a pathogen. Explain the process of the imitation of the immune response (5 marks) The paitent was prescribed antibiotics yet their symptoms did not improve. What can you infer from this? (1 mark)?

Explain the steps of action potential across an axon membrane?

Why is DNA replication semi-conservative?

What is the difference between mitosis and meiosis?

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