Top answers

Biology
A Level

What is Phagocytosis

its a process that a phagocyte completes in order to remove any unwanted pathogens and organism. I will show pictures and diagrams explaining the process to the student. once the phagocyte has ingested th...

MA
Answered by Musa A. Biology tutor
2434 Views

What is the role of a ribosome in the production of a polypeptide? (3)

Begin with asking the student what their understanding is of DNA's structure and function. I would discuss the background structure to DNA - including the matching of base pairs, and the overall structure...

LF
Answered by Laura F. Biology tutor
18010 Views

How is an action potential generated?

During rest, the outside of the neurone membrane is positively charged (relative to the inside). This is because approximately three sodium ions move out for every two potassium ions moving in through the...

SI
Answered by Sabina I. Biology tutor
3322 Views

Use your knowledge of the actin and myosin mechanism of muscle contraction to explain how a vesicle might be "walked" along the cytoskeleton of a cell.

ATP binds the myosin head in its resting state. ATP is hydrolysed to ADP + Pi, releasing energy. This changes the conformation of the myosin head, cocking it. The myosin head reattaches to the actin molec...

AH
Answered by Alex H. Biology tutor
2735 Views

Can you name the 3 different energy systems and give an example when each would be used?

Atp/pc system- ATP is hydrolysed into ADP + Pi, the free phosphate is used in exercises of 2-10s such as a powerlift.Anaerobic energy system- Glucose is the fuel for energy of glycolysis- used in exercise...

SG
Answered by Seb G. Biology tutor
2704 Views

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