Top answers

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
5923 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
4670 Views

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
3489 Views

Describe briefly the role of tRNA and mRNA in the translation process

mRNA is produced from the transcription of DNA in the nucleus. Afte splicing has occured to remove non coding introns from the pre-mRNA, the mRNA leaves the nucleus via nuclear pores. Moving to a ribosome, t...
HM
Answered by Harry M. • Biology tutor
15311 Views

What is a cholinergic synapse?

All synapses are junctions between neurones and cells. Neurotransmitters are released from the presynaptic neurone into the synaptic cleft, and then they bind to the postsynaptic membrane and stimulate actio...
BR
Answered by Ben R. • Biology tutor
31039 Views