GENE MUTATIONS (A2) - AQA A LEVEL BIOLOGY + EXAM QUESTIONS RUN THROUGH

[@AlevelBiologyHelp]

01:04 = Substitution
03:27 = Silent/Neutral Mutations
04:07 = Insertion/Deletion
06:54 = Duplication
07:31 = Inversion
08:28 = Translocation
09:44 = Causes of Mutation
10:23 = Exam questions and mark schemes

[@aaronnanoo1887]

For the question at 19:11, is it correct to say that frame shift of bases could lead to loss of a triplet?

[@AlevelBiologyHelp]

@@aaronnanoo1887 Hi, it's actually the other way round! So a loss of a triplet would cause a frameshift

[@ayeshakhan8726]

You are GEM, keep making videos for A level

[@MiViLiX]

Appreciated highkey! Thank you!

[@otps8035]

3:25 what are the bases in the left from, please? Are they the coding strand? If so the complementary base sequence is AAA And AAU. Not UUU And UUA. I.e. They code for lys and asn. The ones in table from mRNA which is complementary to coding strand.

[@AlevelBiologyHelp]

Hi sorry for the confusion. I was saying what the sequences on the left would be if they were mRNA sequences :)

[@otps8035]

So is it tRNA that have uracil instead of thymine?

[@Sushsmitha]

@@otps8035any type of RNA! mRNA, tRNA etc.

[@Letik3x]

Thank you so much for these video ❤❤

[@J.246]

At 20:22 would I get a mark for saying 3 bases are deleted? Thank youuu

[@mahfoozvalli5970]

thanks video was very helpful

[@maryamishot]

what year are the questions from