gene expression - translation (lecture 12)

Question 1

outline key features of genetic code

Answer 1

• 3 nucleobases = 1 amino acid
• 61 of 64 nucleobase arrangement codes for amino acids
• 3 of 64 codons specify to stop (UAA, UGA, UAG)
• 1 codon specifies to start (AUG, methionine M)
• most amino acids have multiple codons

Question 2

explain protein synthesis and the roles of mRNA tRNA and ribosomes

Question 3

explain dna translation and how ribosomes determine each protein molecule

Answer 3

the initial

Question 4

compare and contrast genotipic and phenotypic variation