Explore how genetic-code structure and codon redundancy shape the relationship between mRNA sequences and polypeptide structure in IB Biology HL D1.2.8.
There is a relationship between form and function in the diversity of molecules and of systems.
Describe the relationship between codons and polypeptide structure.
a. a codon is a triplet of bases of mRNA;
b. (a codon) codes for/ is translated into one amino acid;
c. one codon (AUG) initiates the translation
OR
AUG codes for Methionine/Met;
d. 3 codons (UAA, UAG and UGA) are stop codons;
e. one codon in mRNA matches/pairs with anticodon in tRNA
OR
complementary base pairing between tRNA and mRNA (in translation);
f. genetic code is degenerate
OR
more than one codon/multiple codons can code for one amino acid;
g. order of codons determines order of amino acids/primary structure of polypeptide/protein;
b. Allow codons code for/are translated into
amino acids.
4
Marking guidance:
max