mark schemes Flashcards
yes
1
Q
describe the induced fit
A
-substrate binds to the enzyme
-the active site changes so the substrate and active site are complementary
2
Q
describe how one amino acid is added to the polypeptide being formed in translation
A
-mRNA molecule binds to ribosome
-anticodon of trna minds to the codon of mrna and the ribosome
-the amino acids join in a condensation reaction with peptide bonds
3
Q
Why do amino acid replacement change the properties of an enzyme
A
- because nucleotide triplet changes
-so the amino acid sequence change
-so the tertiary structure changes
4
Q
Describe how a triglyceride molecule is formed
A
- one glycerol molecule and 3 fatty acids
-joined in a condensation reaction where one water molecule is lost
-and join by ester bonds
