Free Forms and Functions of Plants MCQs with Answers

• A. Proteins
• B. Lipids
• C. Chlorophylls
• D. Enzymes

Explanation: Magnesium is a key component of chlorophyll, the green colouring material of plants, and is vital for photosynthesis.

• A. Stroma
• B. Thylakoid
• C. Matrix
• D. Cisternae

Explanation: This is where the components of the electron transport chain are located.

• A. ATP and NADP+
• B. ADP and NADP+
• C. ADP and NADPM
• D. ATP and NADPH

Explanation: After the completion of light reactions in photosynthesis, the molecules released and utilized in the dark reactions are ATP and NADPH…

• A. It induces photolysis
• B. Gains Hydrogen
• C. Accept elecrons
• D. It is oxidised

Explanation: When light falls on P-700, it is oxidised. The electrons are removed.

• A. ATP and NADPH
• B. ATP and glucose
• C. Glucose and NADP
• D. ATP and water

Explanation: These molecules are generated during the light reactions and are used in the subsequent dark reactions to convert carbon dioxide into…

• A. Plastoquinone
• B. Cytochrome - C
• C. Plastocyanin
• D. Ferredoxin

Explanation: It serves as an electron transfer agent between the cytochrome complex which follows Photosystem II and the entry point to Photosystem I…

• A. Magnesium
• B. Iron
• C. Chlorine
• D. Oxygen

Explanation: "The explanation for this question will be added soon!".

• A. 0.2
• B. 0.15
• C. 0.05
• D. 0.01

Explanation: Only 1% of light is absorbed by the leaf.

• A. Water potential
• B. Cohesion tension
• C. Root pressure
• D. Imbibition

Explanation: "The explanation for this question will be added soon!".

• A. Cohesion
• B. Tension
• C. Adhesion
• D. Imbibition

Explanation: Option A: Cohesion refers to the attraction between water molecules themselves, which allows them to stick together and form a continuous…

• A. Chlorophyll a
• B. Chlorophyll b
• C. Chlorophyll c
• D. None of these

Explanation: Chlorophyll a is the most abundant pigment in plants and algae. It is a blue-green pigment that absorbs blue and red light during…

• A. Oxygen
• B. Carbon dioxide
• C. Water
• D. Light

Explanation: Correct option is B. During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil.

• A. Stroma
• B. Grana
• C. Thylakoid
• D. Intergrana

Explanation: The correct answer for this is "Thylakoid". Since chlorophyll is a pigment present in the chloroplast, It is present and embedded in the…

• A. Auxins.
• B. Gibberellins.
• C. Abscisic acid.
• D. Ethane.

Explanation: Gibberellins promote leaf and fruit growths.

• A. Nastic.
• B. Growth.
• C. Turgor.
• D. Tactic.

Explanation: Nastic movements are a type of paratonic movement.

• A. Synchronizes.
• B. Promotes.
• C. Inhibits.
• D. Does not affect.

Explanation: It has been found that red light Inhibits flowering the short day plants but promotes flowering in long day plants.

• A. Enhancement of cell differentiation
• B. Maturation of the cells
• C. Elongation of cells
• D. Enhancement of cell division

Explanation: Explanation:Red light favours elongation of cells and blue light enhances cell division but retards cell enlargement.When red light can…

• A. Carbon dioxide.
• B. Water.
• C. Hormones.
• D. Nutrition.

Explanation: Environmental factors that affect plant growth include light, temperature, water, and humidity.

• A. Infestation.
• B. Exudation.
• C. Bleeding.
• D. Imbibition.

Explanation: Closely associated with root pressure is a phenomenon called guttation or exudation.

• A. Yellow.
• B. Violet-blue.
• C. Green.
• D. Indigo.

Explanation: All plants have chlorophyll a which absorbs most strongly at ~450 nm, or a bright blue color.