Cytoplasm and Cytoskeleton - UNSOLVED PRACTICE SET
Chapter: The Fundamental Unit of Life | Topic: Cytoplasm and Cytoskeleton
CYTOPLASM AND CYTOSKELETON - UNSOLVED PRACTICE SET
Topic: Cytoplasm and Cytoskeleton
Multiple Choice Questions
Q1. The cytoplasm is the part of the cell that lies:
- Inside the nucleus
- Between the cell membrane and the nuclear envelope
- Outside the cell membrane
- Inside the cell wall only
Q2. The cytoskeleton is composed of all EXCEPT:
- Microfilaments
- Intermediate filaments
- Microtubules
- Ribosomes
Q3. Microfilaments are made of the protein:
- Tubulin
- Actin
- Keratin
- Myosin
Q4. Which cytoskeletal component is responsible for chromosome movement during cell division?
- Microfilaments
- Intermediate filaments
- Microtubules
- Nuclear lamina
Q5. The gel-like matrix of the cytoplasm in which organelles are suspended is called:
- Cytosol
- Nucleoplasm
- Protoplasm
- Cytoplasmic fluid
Short Answer Questions
Q6. Describe the composition of the cytoplasm. What is the difference between cytoplasm and cytosol?
Q7. Name the three types of protein filaments that make up the
cytoskeleton and mention one function of each.
Q8. What are microtubules? Describe their structure and two important functions.
Q9. Explain how the cytoskeleton helps in maintaining the shape of the cell and enabling cell movement.
Long Answer Questions
Q10. Draw a diagram showing the three components of the cytoskeleton (microfilaments, intermediate filaments, and microtubules) and label their locations within the cell. Explain how each component contributes to cell structure and function.
Q11. Describe the role of the cytoskeleton in cell division. How do microtubules form the spindle apparatus, and what is the significance of this structure?
APPLICATION / ANALYSIS
Q12. A scientist treats a cell with a drug called cytochalasin B, which prevents the polymerization of actin filaments (microfilaments).
(a) What changes would you expect to observe in the cell's shape and movement?
(b) If the same drug were applied to a cell undergoing division, which stage of division would be most affected, and why?
(c) Another drug called colchicine prevents microtubule formation. How would the effects of colchicine differ from those of cytochalasin B?
Q13. During a school sports day, you notice that your muscle cells are working very hard. Muscle cells contain a highly organised cytoskeleton.
(a) Which cytoskeletal components are most abundant in muscle cells, and why?
(b) How does the cytoskeleton help muscle cells contract and generate force?
(c) If a person has a genetic defect affecting actin filaments, which body functions might be impaired?