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Describe the process of transcription

Transcription is the process of transcribing the DNA code into another type of code or message - mRNA (messenger RNA). An enzyme called RNA polymerase binds to a specific part of a DNA sequence called the pr...
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Answered by Beth S. • Biology tutor
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What is an enzyme?

Enzymes are proteins that are folded into specific shapes to allow for certain 'substrates', the other molecule involved, to bind. This area of binding is known as the 'active site', as it's where all the ac...
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Answered by Shauna M. • Biology tutor
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Describe the structure of a protein.

Proteins are made up of long chains of amino acids (polypeptides) joined together by condensation reaction. Primary structure The proteins primary structure is the sequence and order of amino acids in the pe...
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Answered by Eilidh F. • Biology tutor
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Describe 3 differences between mitosis and meiosis

Mitosis consists of one stage whereas meiosis consists of two stages. Mitosis produces diploid cells (46 chromosomes) whereas meiosis produces haploid cells (23 chromosomes). Mitosis produces two identical d...
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Answered by Runzhi C. • Biology tutor
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Describe how a heartbeat is initiated and coordinated?

The sinoatrial node (SAN) sends a wave of electrical activity across the atria causing atrial contraction. The non-conducting tissue stops the immediate contraction of the ventricles. The atrioventricular no...
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Answered by Dharani Y. • Biology tutor
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