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Describe the metaphase phase of mitosis.

The cell's chromosomes, attached to spindle fibres, align themselves on the metaphase plate in the middle of the cell.
MR
Answered by Matthew R. • Biology tutor
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What is the Bohr effect and how does it affect oxygen unloading?

The Bohr effect describes the change in affinity for oxygen haemoglobin has as a result of an increased partial pressure of CO2. It occurs due to the reaction between CO2 and H20, catalysed by carbonic anhyd...
TM
Answered by Tom M. • Biology tutor
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How do white blood cells respond to infections?

The white blood cells detect the foreign antigens on the cells surface. They then rapidly produce antibodies which match the antigens and attach onto them. This allows other white blood cells to engulf the p...
OD
Answered by Olivia D. • Biology tutor
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What enzymes are used in the process of DNA replication and what are they used for?

The two enzymes used in DNA replication are DNA helicase and DNA polymerase.The DNA helicase is used to break the hydrogen bonds between the two DNA strands so that the strands can unzip. After free nucleoti...
SG
Answered by Seraphima G. • Biology tutor
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Describe how someone with breast cancer could go on to develop lung cancer (3 marks)

If the cancer is malignant, then the cancerous cells could spread via the bloodstream to the lung where a secondary tumor could develop. Lifestyle choices such as smoking that caused the breast cancer could ...
GK
Answered by George K. • Biology tutor
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