Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

11.

During mitosis nuclear membrane disappears at

  • early prophase

  • late prophase

  • metaphase

  • anaphase


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12.

The controlling centre of cell is

  • nucleus

  • nucleolus

  • mitochondria

  • ribosome


A.

nucleus

Hammerling proved that nucleus is the main controlling centre of cell while working on Acetabularia.


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13.

In testis of frog, there are no

  • Sertoli cells

  • spermatocytes

  • spermatids

  • intestinal cells


14.

Iron is stored in bone marrow as

  • haemosedrin

  • ferritin

  • haematin

  • None of these


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15.

Red muscle cells are rich in

  • only myosin

  • haemoglobin and glucose

  • lactic acid and acetic acid

  • myoglobin and cytochrome


16.

Pepsin acts in

  • basic medium

  • acidic medium

  • neutral medium

  • All of these


17.

One difference in breathing mechanism of frog and rabbit is that

  • expansion of frog's lungs is not much

  • abdominal movements more in frog

  • diaphragm and rib muscles play important role in rabbit

  • air reaching frog's lungs is to cool


18.

Kidney stones are crystals of

  • sodium chloride

  • silica

  • calcium oxalate

  • potassium chloride


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19.

All the following are the properties of skeletal muscles except

  • excitability

  • contractility

  • rhythmicity

  • toxicity


20.

In human beings, which hormone acts as a mild growth hormone?

  • Prolactin

  • Oestrogen

  • Progesterone

  • Cortisol


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