Top answers

Describe how an antibody works?

Binding sites on the antibody are complementary to specific binding sites on antigen. Antibodies group together/in groups of 5 (pentamers) and attach to antigen presenting pathogens, forming antigen-antibody...
AP
Answered by Adam P. • Biology tutor
3132 Views

What are the 5 conditions for the Hardy Weinburg equiliberium? And if all of these conditions are met what does the equiliberium state?

The 5 conditions are: Large population, rnadom mating, no mutations, no migration (immegration or emmigration from the population) and no natural selection. If all those conditions are met it states that the...
SE
Answered by Suzannah E. • Biology tutor
4151 Views

Describe how the lac operon works when lactose is both present and absent.

When lactose is absent the lac operon is switched off. This is becasue a repressor protein is produced which binds to the operator region. This prevetns RNA polymerase from binding to the operon and therefor...
SE
Answered by Suzannah E. • Biology tutor
29572 Views

Describe the stages in DNA transcription and translation

First DNA helicase unwinds the strand of DNA. Then, DNA polymerase binds to the anti-sense strand of the DNA and adds RNA nucleotides in a sequence complementary to the strand of DNA. The DNA polymerase cata...
IN
Answered by Iona N. • Biology tutor
3429 Views

How does Acetylcholine act on a neuronal synapse, and how is it re-uptaken?

- Ca2+ voltage gated channels are activated due to an action potential reaching the synapse - Acetylcholine rests in the pre-synaptic cleft - They are stored in vesicles - The calcium influx causes the vesic...
KR
Answered by Krishan R. • Biology tutor
3054 Views