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How are electron microscopes (TEM) fundamentally different from light microscopes and what are the advantages and disadvantages of each?

Microscopes, in general, work by concentrating radiation of a given wavelength be it light or electrons (let's think of it as a wave just like light) onto a specimen (condensor/electromagnets) after which th...
YZ
Answered by YuGeng Z. • Biology tutor
5954 Views

What does the term 'enzyme' mean? What conditions affect an enyme's activity?

An enzyme is a biological catalyst Perform chemical reactions by lowering the activation energy ( could then draw out energy diagram ) Form enzyme-substrate complexes to then form enzyme-product complexes (e...
RB
Answered by Rosie B. • Biology tutor
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Explain how competitive inhibitors work?

Competitive inhibitors, compete for the active site. They have a similar shape to the substrate and so can bind to the active site and prevent the substrate from binding. This means the subtrate cannot bind ...
RG
Answered by Rabia G. • Biology tutor
3503 Views

Only a small percentage of the sun's energy captured by plants is incorporated into body tissues of carnivores. What happens to the rest of this energy?

In a food chain, very little energy is passed onto the next trophic level - this is because living creatures create waste. Energy passes out of the food chain in a number of ways, including; - energy used fo...
TH
Answered by Tabitha H. • Biology tutor
4510 Views

Explain two ways in which the human body reacts to an increase in body temperature above the optimum.

Firstly sweat is released from sweat glands onto the surface of our skin. This acts to decrease body temperature by causing thermal engery to be transfered away from the skin as the sweat evaporates. Secondl...
MS
Answered by Max S. • Biology tutor
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