Protein synthesis 0.0 / 5 ? BiologyCellular processesA2/A-levelEdexcel Created by: francesca_321Created on: 08-12-15 15:19 In transcription what attaches to the DNA? RNA polymerase 1 of 22 What breaks between the paired bases? hydrogen bonds 2 of 22 What unwinds? DNA 3 of 22 What pairs with what in transcription? RNA nucleotides with bases complementary to those on the template strand of the DNA 4 of 22 What do they form? an mRNA molecule 5 of 22 What happens after this happens? the mRNA molecule leaves the nucleus through a pore in the nuclear envelope 6 of 22 What does it attach to? a ribosome 7 of 22 Where does translation occur? on the surface of the ribosome 8 of 22 What are ribosomes made up of? 2 sub units 9 of 22 What subunit does the mRNA bind to? smaller subunit 10 of 22 What does the tRNA bind to? larger unit 11 of 22 What is one side of the tRNA molecule? an anticodon 12 of 22 What is the start code? AUG 13 of 22 What does the ribosome do? holds the mRNA, tRNAs, amino acids and associated enzyme in place while a peptide bond forms between the two amino acids 14 of 22 What is the peptide bond? a condensation reaction 15 of 22 between what? amine group of one amino acid and the carboxylic acid group of the next 16 of 22 what does this form? dipeptide 17 of 22 What is the first nature of the genetic code? It reads as sequences of three bases- triplet code 18 of 22 What is the second nature of the genetic code? the code is non-overlapping 19 of 22 What does this mean? No base of one triplet contributes to part of the next triplet 20 of 22 How else is the genetic code described? degenerative 21 of 22 What does this mean? several triplets can code for the same amino acid. 22 of 22
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