DP Chemistry (last assessment 2024)

Test builder »

Question 18M.3.sl.TZ2.b

Select a Test
Date May 2018 Marks available [Maximum mark: 2] Reference code 18M.3.sl.TZ2.b
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.b

Antiviral medications such as zanamivir (Relenza) are commonly available for consumer use.

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]

Syllabus sections