Question 18M.2.HL.TZ1.5
| Date | May 2018 | Marks available | [Maximum mark: 8] | Reference code | 18M.2.HL.TZ1.5 |
| Level | HL | Paper | 2 | Time zone | TZ1 |
| Command term | Compare and contrast, Distinguish, Draw, Identify, State | Question number | 5 | Adapted from | N/A |
The image shows a cell in a section of an onion root tip seen under a light microscope.
Identify the structure labelled X.
[1]
cell wall
State the stage of mitosis of this cell.
[1]
metaphase
Compare and contrast the location of ATP synthase and the movement of protons during aerobic cell respiration and photosynthesis.
[2]
location of ATP synthase
a. cristae/inner mitochondrial membrane versus thylakoid membranes
movement of protons
b. protons moved/pumped as a result of electron flow/electron transport in both
c. (pumped by the electron transport chain) from the matrix to the intermembrane space versus from the stroma to the thylakoid space
d. through ATP synthase/synthetase in both (respiration and photosynthesis)
e. protons move (through ATP synthase/synthetase) down the concentration gradient in both
f. move (down concentration gradient) from the intermembrane space to the matrix versus from the thylakoid space to the stroma
Using the table, distinguish between the production of ATP, use of oxygen and release of CO2 in aerobic cell respiration between the cytoplasm and the mitochondrion.
[3]
The graph shows energy levels throughout an uncatalysed reaction. Draw a curve to show how the action of an enzyme would affect this reaction.
[1]
curve starting and ending at the same energy level but rising to a lower peak
