Chapter 5 / 6 short lessons
DNA and gene expression
Follow information from complementary DNA through RNA processing to an ordered polypeptide.
H1 Biology / 8876 / 2027 syllabus
What do you think?
A mature mRNA is shorter than the first RNA copy of a gene. Has information necessarily been lost by accident?
Lessons
0 of 6 marked as readRead the DNA molecule
Describe DNA nucleotide structure, double-stranded organisation and information-carrying role.
About 5 minThree RNAs, three related jobs
Describe RNA structure and the roles of mRNA, tRNA and rRNA.
About 5 minCopy each strand before division
Describe semi-conservative DNA replication, including complementary synthesis and discontinuous joining.
About 6 minCopy a gene into RNA
Describe transcription and relate template, coding and RNA sequences.
About 5 minPrepare a mature mRNA
Describe formation of mature mRNA from eukaryotic pre-mRNA.
About 5 minRead codons to build a polypeptide
Describe translation using codons, tRNA, ribosomes and peptide-bond formation.
About 6 minWhat you will be able to do
- Relate nucleic-acid structure to information storage and transfer.
- Explain semi-conservative DNA replication.
- Trace transcription, mRNA processing and translation without mixing their templates or products.
Spaced review
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