Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

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11.

Organisms called Methanogens are most abundant in a 

  • cattle yard

  • polluted stream

  • hot spring

  • hot spring


A.

cattle yard

Methanogens are present in the git of several ruminants animals such as cows and buffaloes and they are responsible for the production of methan (biogas) from the dung of these animals. Thus, they are most abundant in a cattle yard. 

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12.

Which of the following enzymes carries out initial step in the digestion of milk in humans?

  • Rennin

  • Lipase

  • Trypsin

  • Trypsin

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13.

The purplish red pigment rhodopsin contained in the rods type of photoreceptor cells of the human eyes is a derivative of 

  • Vitamin -C 

  • Vitamin -D 

  • Vitamin - A 

  • Vitamin - A 

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14.

Continuous addition of sugars in 'fed-batch' fermentation is done to

  • obtain antibiotics 

  • purify enzymes

  • degrade sewage

  • degrade sewage

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15.

What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its root tip cells? 

  • 63

  • 84

  • 21

  • 21

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16.

Which one of the following plasma proteins is involved in the coagulation of blood? 

  • Serum amylase

  • A globulin

  • Fibrinogen 

  • Fibrinogen 

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17.

Important  site for formation of glycoproteins and glycolipids is

  • Golgi apparatus 

  • plastid

  • lysosome

  • lysosome

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18.

Which of the following are correct states as it happens in the common cockroach?

  • Oxygen is transported by haemoglobin in blood 

  • Nitrogenous excretory products is urea

  • The food is ground by mandibles and gizzard

  • The food is ground by mandibles and gizzard

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19.

Which one of the following correctly explains the function of a specific part of a human nephron?

  • Henle's loop - most reabsorption of the major substances from the glomerular filtrate

  • Distal convoluted - reabsorption of ion into the surrounding blood capillaries

  • Afferent arteriole - carries the blood away from the glomerulus towards renal vein

  • Afferent arteriole - carries the blood away from the glomerulus towards renal vein

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20.

Select the correct option with respect to mitosis

  • Chromatids start endoplasmic 

  • Golgi complex and endoplasmic reticulum are still visible at the end of prophase

  • chromosomes move to the spindle equator and get aligned along equatorial plate in metaphase

  • chromosomes move to the spindle equator and get aligned along equatorial plate in metaphase

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