Pack 9 - Protein Sythesis

Question 1

Describe how mRNA is produced from exposed template strand
Don’t include DNA helicase or splicing

Answer 1

RNA nucleotides lion by complementary base pairing
RNA polymerase joins adjacent nucleotides
Phosodiester bonds form

Question 2

Define the term exons

Answer 2

Nucleotides sequence coding for polypeptides

Question 3

Translation

Answer 3

• mRNA attaches to ribosomes
• codon on mRNA are joined by anticodon on tRNA
• tRNA drops of specific amino acid
• amino acid joins via peptide bonds in a condensation reaction

Question 4

Transcription

Answer 4

DNA helicase breaks hydrogen bonds to unzip DNA
Free RNA nucleotides are joined together by RNA polymerase joined via phosodeister bonds in condensation reaction according to complementary base pairing A=U C=G
Pre mRNA formed first
Introns removed via splicing to produce mRNA