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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
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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
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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...
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Answered by Ishaq H. • Biology tutor
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Explain the process of DNA replication, including the names of vital enzymes

DNA replication is used to copy DNA. This process is semi-conservative, meaning the new double helix contains both a parent and a new strand. The process begins during S phase, where helicase unwinds the DNA...
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Answered by Farrah V. • Biology tutor
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