Photosynthesis in Plants
Questions about photosynthesis, chloroplasts, and related plant physiological processes including light and dark reactions
Questions
Which among the following statements does not characterise the chloroplasts of the plant cells?
- All chloroplasts have at least three membrane systems.
- Many chloroplast DNAs contain numerous inverted repeats.
- Cyanobacteria are considered the ancestors of chloroplasts.
- In land plants, chloroplasts are generally lens-shaped.
- The inner chloroplast membrane regulates the passage of material.
Which of the following statements is/are false?
a. Chromoplasts are white in colour.
b. Leucoplasts can change to other types of plastids.
c. Chromoplasts provide colour to organs to attract pollinators and disseminators.
- Only a
- Only a and b
- Only b
- Only b and c
- Only c
Match the following:
| a. Chromoplasts | 1. Green-coloured plastids |
| b. Chloroplasts | 2. Coloured plastids (except green colour) |
| c. Leucoplasts | 3. The colourless plastids |
- a - 2, b - 1, c - 3
- a - 2, b - 3, c - 1
- a - 1, b - 3, c - 2
- a - 1, b - 2, c - 3
- a - 3, b - 1, c - 2
During light reaction of photosynthesis, which of the following happens?
- Polysaccharides are generated in pyrenoid.
- Carbohydrates are synthesised from CO2 and water.
- Photons from sunlight are trapped to produce ATP and O2.
- All of the above
Which of the following is the waste product produced by plants during photosynthesis?
- Carbon dioxide
- Water vapour
- Nitrogen
- Oxygen
- Hydrogen
Which of the following statements is/are false?
a. The aquatic plants use the carbon dioxide gas dissolved in water for carrying out photosynthesis.
b. In narrow-leaved plants, the stomata occurs only in the narrow surface of the leaf.
c. The opening and closing of the stomatal pores is controlled by the guard cells.
- Only a
- Only a and b
- Only b
- Only b and c
- Only c
Which of the following statements is/are false?
a. In autotrophic nutrition, inorganic material, i.e. food is made from inorganic materials like carbon dioxide and water by utilising the solar energy.
b. The organisms which can make their own food from carbon dioxide and water are called autotrophs.
c. The autotrophic organisms contain the green pigment called chlorophyll which is capable of trapping solar energy.
- Only a
- Only a and b
- Only b
- Only b and c
- Only c
Which of the following processes primarily occurs in photosynthesis?
- Carbon dioxide is reduced to carbohydrates.
- NADH is reduced to NAD.
- ATP is generated.
- Oxidative phosphorylation occurs.
- -
Which of the following statements is/are false?
a. The xylem vessel is a non-living, long tube which runs like a drain pipe through the plant.
b. Xylem vessels contain cytoplasm and nuclei.
c. In flowering plants, either only xylem vessels transport water or both xylem vessels and tracheids transport water.
- Only a
- Only a and b
- Only b
- Only b and c
- Only c
During photosynthesis, water is split into its constituents. This process is known as
- hydrolysis
- photolysis
- plasmolysis
- hemolysis
- -
Which of the following events does not occur during photosynthesis?
- Absorption of light energy by roots
- Conversion of light energy to chemical energy
- Splitting of water molecules into hydrogen and oxygen
- Reduction of carbon dioxide into carbohydrates
Where does the dark reaction of photosynthesis occur?
- Grana
- Stroma
- Matrix
- Cytoplasm
Photosynthesis consists of two phases; a light reaction and a dark reaction. Dark reaction in photosynthesis is called 'dark' because
- it can also occur in dark
- it does not require light energy
- None of these
- Both of these
- -
The products formed at the end of a 'dark reaction' are
- RuBP, ADP, ip, NADP and glucose
- RuBP, ATP, NADPH and glucose
- glucose
- oxygen and glucose
Dark reaction is traced by
- X-rays
- O18
- 14CO2
- P32