This 43-slide powerpoint presentation covers 'Topic 2.7 - DNA Replication, Transcription & Translation' in the 2016 IB Biology curriculum. Each slide includes the specific learning
objective as well as key vocabulary that students should note. The topic has been divided into 3 sections:
A - DNA Replication
B - Transcription
C - Translation
The presentation itself contains minimal information as it is intended to be used with teacher guidance. They are also formatted to be visually pleasing and to print well for handouts or
revision. Please see the preview file for an idea of the slide aesthetic and level of detail.
As always, please let me know if you have any suggestions for improvements. These are always a work in progress!
U1: The replication of DNA is semi-conservative and depends on complementary base pairing.
U2: Helicase unwinds the double helix and separates the two strands by breaking hydrogen bonds.
U3: DNA polymerase links nucleotides together to form a new strand, using the pre-existing strand as a template.
U4: Transcription is the synthesis of mRNA copied from the DNA base sequences by RNA polymerase.
U5: Translation is the synthesis of polypeptides on ribosomes.
U6: The amino acid sequence of polypeptides is determined by mRNA according to the genetic code.
U7: Codons of three bases on mRNA correspond to one amino acid in a polypeptide.
U8: Translation depends on complementary base pairing between codons on mRNA and anticodons on tRNA.
A1: Use of Taq DNA polymerase to produce multiple copies of DNA rapidly by the polymerase chain reaction (PCR).
A2: Production of human insulin in bacteria as an example of the universality of the genetic code allowing gene transfer between species.
S1: Use a table of the genetic code to deduce which codon(s) corresponds to which amino acid.
S2: Analysis of Meselson and Stahl’s results to obtain support for the theory of semi-conservative replication of DNA.
S3: Use a table of mRNA codons and their corresponding amino acids to deduce the sequence of amino acids coded by a short mRNA strand of known base sequence.
S4: Deducing the DNA base sequence for the mRNA strand.