Plastids - Types and Functions - UNSOLVED PRACTICE SET
Chapter: The Fundamental Unit of Life | Topic: Plastids Types and Functions
PLASTIDS - TYPES AND FUNCTIONS - UNSOLVED PRACTICE SET
Topic: Plastids Types and Functions
Multiple Choice Questions
Q1. Plastids are found in:
- Animal cells only
- Plant cells only
- Both plant and animal cells
- Bacterial cells only
Q2. Chloroplasts contain green pigments called:
- Carotenoids
- Chlorophyll
- Xanthophyll
- Anthocyanin
Q3. Chromoplasts are responsible for:
- Photosynthesis
- Storage of starch
- Imparting colour to flowers and fruits
- Protein synthesis
Q4. Leucoplasts are colourless plastids that function primarily in:
- Photosynthesis
- Storage of food materials
- Cell division
- Respiration
Q5. The internal membrane system of chloroplasts consists of flattened sac-like structures called:
- Cristae
- Thylakoids
- Cisternae
- Vesicles
Short Answer Questions
Q6. Name the three types of plastids and state one function of each.
Q7. Describe the structure of a chloroplast. What is the significance of the thylakoid membrane system?
Q8. Differentiate between chloroplasts and chromoplasts in terms of structure, colour, and function.
Q9. Explain why leucoplasts are found in roots and underground stems, while chloroplasts are found in leaves.
Long Answer Questions
Q10. Draw a well-labelled diagram of a chloroplast showing the outer membrane, inner membrane, stroma, thylakoids, grana, and lamellae. Explain how the structure of chloroplasts is adapted for photosynthesis.
Q11. Describe the different types of leucoplasts (amyloplasts, elaioplasts, and proteinoplasts) and their specific storage functions.
APPLICATION / ANALYSIS
Q12. A farmer notices that his tomato plants have green tomatoes that turn red as they ripen.
(a) What type of plastid is responsible for the green colour in unripe tomatoes? Explain.
(b) What happens to this plastid as the tomato ripens and turns red? Name the plastid involved.
(c) If a scientist could prevent this colour change, how might it affect the tomato's nutritional value and market appeal?
Q13. In a biology experiment, a student places a potted plant in a dark cupboard for 5 days. She then examines the leaves under a microscope.
(a) What changes would she observe in the chloroplasts of the leaves? Explain.
(b) If the plant is then returned to sunlight, what would happen to the chloroplasts over the next few days?
(c) Why do plants grown in low light conditions often have larger and thinner leaves compared to plants grown in bright light?