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What are the steps in semi-conservative DNA replication?

Initially, the DNA is present in the form of a double helix, comprising 2 polynucleotide strands joined by hydrogen bonds between complementary bases. The enzyme helicase unwinds and separates the 2 strands ...
HP
Answered by Hannah P. • Biology tutor
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How do electrical impulses control the regular beating of the heart?

The electrical beating of the heart is controlled by the cardiovascular control centre located within the medulla oblongata within the brain. Heart rate is controlled by the frequency of impulses being sent ...
WG
Answered by William G. • Biology tutor
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Explain the four levels of protein structure, indicating the significance of each level

There are four levels to a protein's structure:Firstly, the primary structure which is the sequence of amino acids linked by peptide bonds. This level determines the type/function of the protein by influenci...
SS
Answered by Shivani S. • Biology tutor
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DNA mismatch repair enzymes repair mainly bases on the newly synthesised DNA strand, using the old DNA strand as a template. If the mismatches were simply repaired without regard for which strand served as template, would this reduce replication errors ?

if the old strand were repaired using the new strand that contains replication error as the template. Then the error would become a permanent mutation in the genome. The old information would be erased in th...
DS
Answered by Dorota S. • Biology tutor
4201 Views

Which body organ has both an exocrine and endocrine function?

Exocrine glands release their product to the external environment, while endocrine glands release their product directly into bodily fluids. The pancreas does both: it releases digestive enzymes into the sma...
OS
Answered by Oana S. • Biology tutor
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