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What makes DNA molecules so stable?

The main bonding in DNA which renders the double helix structure so stable is that of hydrogen bonds. Between the complementary base pairs, hydrogen bonds connect the two strands of the helix. There are 3 H ...
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Answered by Steven A. • Biology tutor
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Describe the structure of haemoglobin and how it is suited to it's function?

Two alpha subunits and two other subinits that vary depending on th type of haemoglobin, either beta,delta, gamma or epsilon. Each subunit contains on heme group. Heme group contains four pyrol rings and a c...
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Answered by Ollie F. • Biology tutor
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How are Xerophytes adapted to dry environments?

Start by considering what Xerophytes are, they are plants that live in dry conditions. What are the problems with dry conditions? Well, the big problem is maintaining a constant amount of water in the body. ...
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Answered by Luke C. • Biology tutor
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Explain eutrophication and why it can lead to the death of invertebrates and fish in rivers.

Eutrophication is due to high levels of nutrients (nitrates) in the water. This leads to increased growth of algae and other plants which leads to "algal blooms". This is where the surface of the w...
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Answered by Ashleigh E. • Biology tutor
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Describe the processes involved in protein production within a cell

First, DNA-helicase (an enzyme) separates the two strands of DNA to allow RNA polymerase (another enzyme) to produce messenger RNA (mRNA) from free nucleotides, coded for by a gene in the DNA. The mRNA then ...
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Answered by Oisin B. • Biology tutor
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