Important Revision

Question 1

Semi-Conservative Replication

Answer 1

• DNA helicase UNZIPS
• H(ari)-bonds break
• Free nucleotides ALIGN
• COMPLEMENTARY BASE PAIRING *

• H(ari)- bonds REFORM

• SUGAR PHOSPHATE BACKBONE *
• From covalent bonds 007
• DNA polymerase joins nucleotides
• POLYNUCLEOTIDE CHAIN *

Question 2

Transcription

DNA -> mRNA

Answer 2

• Helicase UNZIPS DNA

• RNA nucleotides - COMPLEMENTARY BASE PAIRING
* (on template strand) *

• RNA polymerase JOINS nucleotides

• PHOSPHO DI ESTER BONDS *
• Stop codon DETACHES RNA polymerase
• mRNA detaches & leaves NUCLEUS

Question 3

Translation

Answer 3

• mRNA ATTACHES to ribosome
• mRNA binds to tRNA
• COMPLEMENTARY ANTICODON *
• tRNA bound to AMINO ACID
• 2nd tRNA binds to mRNA codon
• TWO amino acids -> PEPTIDE BOND
• Stop Codon
• POLYNUCLEOTIDE