This page contains the AQA A2 Amino Acids,Proteins And DNA Questions and kerboodle answers for revision and understanding .This page also contains the link to the notes and video for the revision of this topic.
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C30.1 Introduction to amino acids AQA A2 Chemistry C30 Amino Acids,Proteins And DNA Kerboodle Answers: Page No. 205
1 2-aminopropanoic acid 2 Carbon number 2 in alanine has four different groups attached to it.30.2 Peptides, polypeptides, and proteins AQA A2 Chemistry C30 Amino Acids,Proteins And DNA : Page No. 211
1 a Amine and carboxylic acid b The carboxylic acid is acidic; the amine is basic. 2 Two 3 They will be protonated, ie there will be a H+ ion attached to the -NH2. +H3NCH(CH3) CO2H 430.3 Enzymes AQA A2 Chemistry C30 Amino Acids,Proteins And DNA : Page No. 212
1 Ionic bonding and hydrogen bonding. 2 Van der Waals forces and dipole-dipole forces30.4 DNA AQA A2 Chemistry C30 Amino Acids,Proteins And DNA : Page No. 216
1 GGTCAACTGG 2 The phosphate groups which form the backbone of the DNA have P-0-H groups. These can donate the hydrogen atom as a proton. ie P-0-H →P-o–+ H+30.5 The action of anti-cancer drugs AQA A2 Chemistry C30 Amino Acids,Proteins And DNA : Page No. 217
1 The two chloride ligands are too far apart to effectively bond to two adjacent guanine bases. Banner 2Practice questions: Page No. 218-219
1 (a). (i) (ii) (b) (c) 2 3 (a) (b) (c) Hydrogen bonding 4 (a) Molecules with same structural formula but with bonds arranged differently in space (b) Plane polarised light rotated equally in opposite directions 5- 2-deoxyribose
- Base A
- Top N–H forms hydrogen bonds to lone pair on O of guanine
- The lone pair of electrons on N bonds to H–N of guanine
- A lone pair of electrons on O bonds to lower H–N of guanine
- Allow either of the nitrogen atoms with a lone pair NOT involved in bonding to cytosine
- Use in very small amounts / target the application to the tumour