1. What is one effect of cytokinins on plant cells?
A.
They promote cell enlargement
B.
They stop water absorption
C.
They destroy the cell wall
D.
They prevent vacuole formation
Correct Answer:
They promote cell enlargement
Explanation:
Cytokinins can promote the enlargement of certain plant cells, helping them increase in size.
2. Cell enlargement caused by cytokinins mainly results in an increase in the size of which structure?
A.
Plant cell
B.
Bacterial cell
C.
Viral particle
D.
Animal red blood cell
Correct Answer:
Plant cell
Explanation:
Cytokinins are plant hormones, and their cell-enlarging effect occurs in plant cells.
3. Which process supports cytokinin-related cell enlargement?
A.
Water uptake by the cell
B.
Loss of all cell contents
C.
Breakdown of the cell membrane
D.
Removal of the vacuole
Correct Answer:
Water uptake by the cell
Explanation:
Water uptake increases cell volume and supports the enlargement of plant cells influenced by cytokinins.
4. During cell enlargement, the vacuole generally becomes:
A.
Larger
B.
Absent
C.
Smaller in every case
D.
Converted into a nucleus
Correct Answer:
Larger
Explanation:
Vacuole expansion allows more water to be stored and contributes to the increase in plant cell size.
5. Cytokinins can help a plant cell become larger by promoting:
A.
Cell expansion
B.
Cell disappearance
C.
Permanent water loss
D.
Nuclear destruction
Correct Answer:
Cell expansion
Explanation:
Cell expansion is the process by which a plant cell increases in size, and cytokinins can support this process.
6. Which change is most directly associated with cell enlargement in a plant cell treated with cytokinin?
A.
Increase in cell volume
B.
Decrease in cell volume
C.
Complete loss of cytoplasm
D.
Formation of a bacterial capsule
Correct Answer:
Increase in cell volume
Explanation:
Cell enlargement means that the volume of the plant cell increases, often through water uptake and vacuole expansion.
7. Cytokinin-supported enlargement is most closely related to an increase in:
A.
Cell size
B.
Cell death
C.
Cell wall removal
D.
Loss of cellular water
Correct Answer:
Cell size
Explanation:
The term cell enlargement refers specifically to an increase in the size of a plant cell.
8. Which structure helps a plant cell enlarge by accumulating water?
A.
Vacuole
B.
Ribosome
C.
Nucleolus
D.
Chloroplast DNA
Correct Answer:
Vacuole
Explanation:
The vacuole stores water, and its expansion contributes to the enlargement of the plant cell.
9. A cytokinin effect that increases the size of an existing plant cell is called:
A.
Cell enlargement
B.
Cell shrinking
C.
Cell dehydration
D.
Cell rupture
Correct Answer:
Cell enlargement
Explanation:
Cell enlargement is the cytokinin-related increase in the size or volume of an existing plant cell.
10. Which observation indicates that cytokinin has promoted cell enlargement?
A.
The treated plant cells become larger
B.
The treated cells lose their vacuoles
C.
The treated cells lose all water
D.
The treated cells become viruses
Correct Answer:
The treated plant cells become larger
Explanation:
An increase in the size of treated plant cells is direct evidence of cytokinin-supported cell enlargement.
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