Plants purify air by which process?

• Photorespiration

• Photosynthesis

• Photophosphorylation

• Transpiration

Sunken stomata occur in

• xerophytes

• hydrophytes

• mesophytes

• opsanophytes

Dimorphism of chloroplast is found in

• C₃ - plants

• C₄ - plants

• CAM plants

• Both (b) and (c)

224.

The first carbon dioxide fixation in C₄ pathway occurs in chloroplasts of

• guard cells

• mesophyll cells

• bundle sheath cells

• epidermal cells

CO₂ acceptor in C₃ cycle is

• OAA

• RuBP

• PEP

• Malic acid

In a CAM plant, the concentration of organic acid

• increases during the day

• decreases or increases during the day

• increases during night

• decreases during any time

Chloroplast dimorphism is a characteristic feature of

• plants with Calvin cycle

• C₄ -plants

• all plants

• only in algae

In which type of reactions related to plant photosynthesis peroxisomes are involved?

• Glycolate cycle

• Calvin cycle

• Bacterial photosynthesis

• Glyoxylate cycle

Example of water soluble plant pigment is

• chlorophyll- a

• chlorophyll- b

• anthocyanin

• xanthophyll

Identify the membrane across which the proton (H⁺) gradient facilitates ATP synthesis in a typical eukaryotic cell

• plasma membrane

• mitochondrial inner membrane

• mitochondrial outer membrane

• nuclear membrane