Question 18M.3.sl.TZ2.19
| Date | May 2018 | Marks available | [Maximum mark: 4] | Reference code | 18M.3.sl.TZ2.19 |
| Level | sl | Paper | 3 | Time zone | TZ2 |
| Command term | Distinguish, Identify | Question number | 19 | Adapted from | N/A |
Antiviral medications such as zanamivir (Relenza) are commonly available for consumer use.
Identify the names of two functional groups present in zanamivir using section 37 of the data booklet.
[2]
Any two of:
hydroxyl
carboxyl/carbonyl
ether
amido/carbonyl
Accept “alcohol/hydroxy” for “hydroxyl”, “carboxylic acid” for “carboxyl” and “amide/carboxamide” for “amido”.
Accept “amino/amine” OR “imine/imino” but these are not correct as they are part of the guanidino group.
Accept “alkenyl/alkene/carbon to carbon double bond” but not “C=C” OR “carbon double bond”.
Accept “carbonyl” only once.
Accept “heterocyclic ring” for “ether”.
[2 marks]
Distinguish between bacteria and viruses.
[2]
Any two of:
bacteria perform living functions «on their own» AND viruses do not «without host cell»
bacteria have cell walls AND viruses do not
OR
bacteria do not have a capsid AND viruses do
bacteria larger than viruses
bacteria reproduce by fission/budding AND viruses reproduce within a living host cell
Accept examples of living functionsexcretion, reproduction etc for M1.
Accept “bacteria have flagella/cytoplasm/ribosome AND virus can have head/protein tail/double stranded RNA/single stranded DNA”.
Accept other specific structural differences for M2.
Accept “asexual reproduction for bacteria” for M4.
[2 marks]