2 Answers
In a plant cell, the role of the membrane is played by the…
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Use the diagram below to answer question 4 to 6
In a plant cell, the role of the membrane is played by the…
A. nucleolus
B. cell wall
C. cytoplasm
D. mitochondrion
QUICK ANSWER…
B
DETAILS…
The membrane serves as a semi-permeable medium that allows movement of water across and between the two solutions.
Now for the right answer to the above question:
- The option of nucleolus is wrong, nucleolus is an organelle domiciled in the nucleus, it does not involve itself with movement of water in and out of the cell. A is very wrong.
- B is correct; cell walls serve as interfaces between the internal cytoplasm and the external environment, they filter and control the movement of water and nutrients into and out of their cells.
- No, cytoplasm will be likened to the sugar solution, in fact, it is the internal cell solution where organelles are suspended. C is wrong
- Actually, mitochondria have nothing to do with movement of water and nutrient in and out of a cell, mitochondria are the respirators or generators of cell energies… D is incorrect
KEY-POINTS…
You may please note that in a cell,
- The membrane could be likened to the cell wall,
- The sugar solution could be likened to the cytoplasm,
- And the distilled water could be likened to the cell’s immediate environment.
you may use the questions and answers session to deal further with this topic…
/ culled from 2018 JAMB-UTME biology question 6 /
