DP Chemistry (last assessment 2024)
Question 18M.3.sl.TZ2.19b
| Date | May 2018 | Marks available | [Maximum mark: 2] | Reference code | 18M.3.sl.TZ2.19b |
| Level | sl | Paper | 3 | Time zone | TZ2 |
| Command term | Distinguish | Question number | b | Adapted from | N/A |
b.
[Maximum mark: 2]
18M.3.sl.TZ2.19b
Antiviral medications such as zanamivir (Relenza) are commonly available for consumer use.
(b)
Distinguish between bacteria and viruses.
[2]
Markscheme
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]
