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What is the function of the kidneys and how do they carry this out?

Broadly speaking, the main function of the kidneys is to filter out waste from the body and excrete it out in the urine. Excretion is the removal of waste (i.e. products of metabolism/ toxic products like ur...
MR
Answered by Mannat R. • Biology tutor
3564 Views

Describe the role of two named enzymes in the process of semi-conservative replication of DNA

DNA helicase breaks the hydrogen bonds between DNA strands, separating the double-stranded DNA into single strands and exposing the nucleotide bases.DNA polymerase joins adjacent DNA nucleotides through form...
MC
Answered by Maddy C. • Biology tutor
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How is an Action Potential transmitted across a synapse?

-An action potential arrives at the presynaptic membrane-Ca 2+ ion channels open-Ca 2+ ions diffues into presynaptic knob-Acetylcholine/ neurotransmitter in vesicles-Vesicles move towards presynaptic membran...
DW
Answered by Darcie W. • Biology tutor
3075 Views

Most cases of scarlet fever occur in children. Adults have usually developed immunity to a toxin that the Streptococcus bacteria produce during infection. Explain how an adult develops immunity to the toxin.

Previous exposure to the toxin confers immunity by eliciting an immune response whereby b-cells differentiate into plasma cells allowing the production of antibodies. These will in turn stimulate production ...
GS
Answered by Georgia S. • Biology tutor
9337 Views

How is the structure of DNA related to its function

The sugar-phosphate backbone is double stranded so protects the bases; DNA is a large molecule so can store lots of information; DNA is coiled so compact;Base sequence codes for amino acids; DNA is double st...
IH
Answered by Ishaq H. • Biology tutor
6027 Views