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

1.

Antibiotic flavicin is obtained from

  • Aspergillus flavus 

  • Aspergillus clavatum

  • Streptomyces grieseus

  • Streptomyces fradiae


2.

The crystal of lead zirconate is a key component of

  • sonography

  • electrocardiography

  • electroencephalography

  • magnetoencephalography


3.

Antifeedant property occurs in

  • nicotine

  • azadiractin

  • rotenone

  • cinerin


4.

'Climacteric' is

  • a phenomenon related to fruit ripening

  • the condition of a plant when all its fruits are almost ripe

  • the condition of a plant when most of its leaves have turned yellow

  • none of the above


Advertisement
5.

Ethylene is a

  • gaseous hormone

  • gaseous enzyme

  • liquid-gas mixture

  • solid hormone


6.

Which is not a gonadal hormone

  • Progesterone

  • Testosterone

  • Adrenalin

  • Estrogen


7.

Cochlea of mammalian internal ear is concerned with

  • hearing

  • balance of body posture

  • both (a) and (b)

  • perception changes of atmospheric pressure


Advertisement

8.

The part of an eye which acts like a diaphragm of a photographic camera is

  • pupil

  • iris

  • lens

  • cornea


B.

iris

The iris of the eye is the thin, circular structure made of connective tissue and muscle that surrounds the pupil. The color of our eyes is determined by the amount of pigment in the iris apart from this  the iris acts like the diaphragm of a camera and controls the size of the pupil. One muscle within the iris constricts the pupil in bright light (full sunlight, for example), and another iris muscle dilates (enlarges) the pupil in dim lighting and in the dark.


Advertisement
Advertisement
9.

The dendrite carries impulses

  • towards the cyton

  • away from cyton

  • across the body

  • from one neuron to another


10.

Cerebrospinal fluid is present

  • beneath the pia mater

  • between piamater and arachnoid

  • between arachnoid and duramater

  • between duramater and cranium


Advertisement