Question
1.How do surface area, volume, and surface area to volume ratio of a cell change as the cell becomes larger without changing shape?
Answer/Explanation
Ans : B
Question
2. Which cell component is present in eukaryotic cells but absent in prokaryotic cells?
A. Mitochondria for respiration
B. DNA containing genetic information
C. Ribosomes for protein synthesis
D. Cell wall to maintain shape
Answer/Explanation
Ans : A
Question
4. What characterises the movement facilitated by the protein channels in the diagram across the cell membrane?
A. Energy of ATP is used to transport substances into the cell.
B. Substances can move from areas of low to areas of high concentration.
C. The proteins ensure that movement of substances is only in one direction.
D. Net movement occurs until the concentrations in and out of the cell are equal.
Answer/Explanation
Ans : D
Question
5. The root tip of an onion (Allium cepa) (2n = 16) during late prophase of mitosis.
How many chromatids are present in the cell?
A. 8
B. 16
C. 32
D. 64
Answer/Explanation
Ans : C