A cell packs its digestive enzymes inside a membrane-bound sac rather than loose in the cytoplasm. What does this achieve?
AIt lets the enzymes escape more easily
BIt stops the cell from needing any energy
CIt gives the whole cell its rigid shape
DIt keeps incompatible reactions separated
Answer & Solution
Correct answer: D. It keeps incompatible reactions separated
1. A membrane around an organelle creates a separate compartment inside the cell.
2. That compartment can hold conditions — a pH, an enzyme set — different from the cytoplasm around it.
3. So reactions that would interfere with one another can run at the same time in different places.
4. It also confines destructive enzymes, protecting the rest of the cell from being digested.
5. Giving the cell its shape is the work of the cell wall or membrane, which is the answer candidates gave when asked about compartmentalisation.
_Source: NECTA ACSEE 2022 Biology 133/1, Question 1: Cytology_
Related questions
A student claims amylase survives 75°C because its bonds are strong ionic ones. What is wrA scientist adds saliva boiled to 75°C to starch solution, then tests for starch and gets Recording observations as a biological drawing is done mainly to:A specimen 2 cm long is drawn 6 cm long. The magnification of the drawing is:How many membranes enclose a mitochondrion?A mitochondrion is described as a cell within a cell mainly because it: