Microtubule depolymerizing drug such as colchicine is expected to

• inhibit spindle formation during mitosis

• inhibit cytokinesis

• allow mitosis beyond metaphase

• induce formation of multiple contractile rings

Kranz anatomy is usually associated with

• C₃ plants

• C₄ plants

• CAM plants

• C₃-C₄intermediate plants.

Leghaemoglobin is produced in response to

• respiration

• photosynthesis

• fatty acid synthesis

• N₂ fixation

Apiculture is associated with which of the following groups of plants

• Grapes, maize, potato

• Sugarcane, paddy, banana

• Guava, sunflower, strawberry

• Pineapple, sugarcane, strawberry

Which of the following is correctly labelled for the given figure

• A: PS II; B : PS I; C :e^- acceptor, D: LHC

• A: LHC; B:e^- acceptor; C: PS I; D: PS II

• A: PS I; B:PS II; C:e^- acceptor; D: LHC

• A: e^- acceptor; B : LHC; C: PS Il; D: PS I

Catecholamine in a normal person induces

• intense salivation

• alertness

• decrease in heart beat

• excessive urination.

Which of the following cartoon characters does not share its name with that of a gene

• Tintin

• Popeye

• Asterix

• Obelix

Oxygen binding to haemoglobin in blood is

• directly proportional to the concentration of CO₂ in the medium

• inversely proportional to the concentration of CO₂ in the medium

• directly proportional to the concentration of CO in the medium

• independent of the concentration of CO in the medium

During muscular contraction, which of the following events occur

(i) H-zone disappears
(ii) A band widens
(iii) I band reduces in width
(iv) Width of A band is unaffected
(v) M line and Z line come closer

• (i), (iii), (iv) and (v)

• (i), (i) and (v)

• (ii), (iv) and (v)

• (i), (ii) and (iii)

The release of chemical messenger from synaptic vesicles is under the influence of these ion(s).

• Cl^- 

• Fe and S²⁺

• Ca²⁺

• Mg²⁺ and Sr²⁺