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Biology
A Level

How do enzymes lower the activation energy of reactions?

Enzymes are biological catalysts for lowering activation energy - the speed up the rate of reactions and all allow biological reactions involved in metabolic processes to take place at bo...

Answered by Katie J. Biology tutor
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Answered by Lewys B. Biology tutor
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The allele y occurs with a frequency of 0.8 in a population of clams. Give the frequencies of the genotypes YY, Yy and yy.

To do this we use the Hardy-weinburg equation.p2+2pq+q2=1frequency of y = q, frequency of Y=pFirst we work out the frequency of Y(p)p+q=11-0.8=0.2p=0.2Then we plug our p and q values...

Answered by Biology tutor
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What are the three main properties of the genetic code?

Triplet code - a sequence of three bases (called a codon) codes for an amino acid. Degenerate code - more than one codon can code for a single amino acidnon-overlapping - the bases in the genetic code are...

Answered by Biology tutor
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Describe the main differences between mitosis and meiosis

Number of cell divisions: there is 1 cell division in mitosis and 2 in meiosis. Daughter cells: mitosis produces 2 daughter cells genetically identical to each other and the parent cell, whereas meiosis p...

Answered by Jennifer A. Biology tutor
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