Which of the following characteristics is are exhibited by C₄ -plants?

I. Kranz anatomy.
II. The first product of photosynthesis is oxaloacetic acid.
III. Both PEP carboxylates and ribulose biphosphate carboxylate act as carboxylating enzymes.

The correct option is

• I and III, but not ll

• I and II, but not III

• II and III, but not I

• ll and III

Which of the following plant keeps its stomata open during night and closed during the day?

• Orchid

• Cactus

• Tea

• Wheat

In which one of the following, the male and female gametophytes don’t have free-living independent existence?

• Pteris

• Funaria

• Polytrichum

• Cedrus

44.

Quantasome are present in

• Chloroplast

• Mitochondria

• Golgi body

• Lysosome

Which of the following cell organelles is associated with photorespiration?

• Mitochondria

• Peroxysome

• Chloroplast

• All of these

The net requirement of assimilatory power for the formation of 6 hexose molecules in maize plant is

• 72 ATP, 48 NADPH

• 90 ATP, 60 NADPH

• 108 ATP, 72 NADPH

• 180 ATP, 72 NADPH

Which one of the following elements is an activator for both ribulose biphosphate, carboxylase oxygenase and phosphoenol-pyruvate carboxylase in photosynthetic carbon fixation?

•  Mg²⁺

• Zn²⁺

•  Mn²⁺

• Cl⁻ and K⁺

Vegetative propagation of Bryophyllus takes place through

• Bulbil

• Corms

• Leaf buds

• Eyes

Which of the following characteristics out of I, II and III are exhibited by C₄ plants?

I. Kranz anatomy.

II. The product of photosynthesis is oxalo acetic acid.

III. Both PEP carboxylase and ribulose-bis phosphate carboxylase act as carboxylating enzyme.

Choose the correct option.

• I and II, but not III

• II and III, but not I

• I and III, but not II

• All of these

Light reaction in stroma lamellae of the chloroplast results in the formation of

• NADPH

• ATP + NADPH

• ATP K

• O₂