Subject

Biology

Class

NEET Class 12

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

11.

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

  • Tintin

  • Popeye

  • Asterix

  • Obelix


12.

Apiculture is associated with which of the following groups of plants

  • Grapes, maize, potato

  • Sugarcane, paddy, banana

  • Guava, sunflower, strawberry

  • Pineapple, sugarcane, strawberry


13.

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


14.

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)


Advertisement
Advertisement

15.

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

  • Cl- 

  • Fe and S2+

  • Ca2+

  • Mg2+ and Sr2+


C.

Ca2+

When an impulse arrives at the synaptic knob of the axon, it depolarizes the presynaptic membrane and increases its permeability to calcium ions (Ca2+). Ca2+ ions from the synaptic cleft pass into the synaptic knob via voltage gated channels. Sudden rise in the cytosolic concentration of Ca, causes the release of a chemical, called neurotransmitter substance, from small synaptic vesicles present there into the synaptic cleft by exocytosis through the presynaptic membrane.


Advertisement
16.

Kranz anatomy is usually associated with

  • C3 plants

  • C4 plants

  • CAM plants

  • C3-C4intermediate plants.


17.

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


18.

Catecholamine in a normal person induces

  • intense salivation

  • alertness

  • decrease in heart beat

  • excessive urination.


Advertisement
19.

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


20.

Leghaemoglobin is produced in response to

  • respiration

  • photosynthesis

  • fatty acid synthesis

  • N2 fixation


Advertisement