Question 21M.2.SL.TZ1.c
| Date | May 2021 | Marks available | [Maximum mark: 5] | Reference code | 21M.2.SL.TZ1.c |
| Level | SL | Paper | 2 | Time zone | TZ1 |
| Command term | Outline | Question number | c | Adapted from | N/A |
Outline the range of functions of proteins in cells.
[5]
a. enzymes that catalyse/speed up/control (the rate and direction of) metabolic reactions ✔
b. proteins can be hormones which are chemical messengers to cells ✔
c. proteins that transport through the membrane such as channel/carrier/pumps / that regulate what enters/leaves the cell ✔
d. hemoglobin in red blood cells that transports/ binds oxygen ✔
e. membrane proteins for cell/tissue recognition/cell adhesion/communication ✔
f. structural elements of muscle fibre/actin/myosin for movement
OR
spindle fibres move chromosomes ✔
g. histones condense DNA into chromosomes ✔
The question requires answer that the function is in cells.
This question was attempted by about 42 % of candidates.
Generally good answers were received for those who read the question correctly, i.e. protein function within cells.
