WJEC Biology AS Unit 1

Biology

revised using this and past papers mainly, learnt almost everything from WJEC blended learning, ended up getting 93/100 UMS

Sample Data

Front Describe and explain the elongation stage of translation (2nd)
Back The two amino acids are close together and form peptide bonds catalysed by a ribosmal enzyme, this is a condensation reactionThe first tRNA leaves the enzyme, leaving its attachment site vacant.To allow another tRNA molecule to attach to the ribosome since there are only two attachment site The ribosome moves the mRNA molecule one codon along, and the vacant attachment site is ocupied by a new and appropriate tRNA molecule
Front Do competative inhibitors bind reversibly or permenantly
Back reversibly
Front What type of bond is a disulphide bond
Back Covalent
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