AS Level Biology - Protein Synthesis

**This Powerpoint specifically uses the Cambridge AS Level Biology Syllabus and covers all criteria for – Unit 1.1 The microscope in cell studies
**
Students will be able to -

1 state that a polypeptide is coded for by a gene and that a
gene is a sequence of nucleotides that forms part of a DNA
molecule

2 describe the principle of the universal genetic code in which
different triplets of DNA bases either code for specific amino
acids or correspond to start and stop codons

3 describe how the information in DNA is used during
transcription and translation to construct polypeptides,
including the roles of:
• RNA polymerase
• messenger RNA (mRNA)
• codons
• transfer RNA (tRNA)
• anticodons
• ribosomes

4 state that the strand of a DNA molecule that is used in
transcription is called the transcribed or template strand and
that the other strand is called the non-transcribed strand

5 explain that, in eukaryotes, the RNA molecule formed
following transcription (primary transcript) is modified by the
removal of non-coding sequences (introns) and the joining
together of coding sequences (exons) to form mRNA

6 state that a gene mutation is a change in the sequence of
base pairs in a DNA molecule that may result in an altered
polypeptide

7 explain that a gene mutation is a result of substitution or
deletion or insertion of nucleotides in DNA and outline how
each of these types of mutation may affect the polypeptide
produced

**Every Powerpoint includes learning objectives, a starter and plenary, suitable activities and review questions with mark scheme. We also provide a FREE pdf version of the file so it can easily be printed for students as a handout or uploaded to the school VLE system
**

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