Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

11.

In the stomach, gastric acid is secreted by the

  • parietal cells

  • peptic cells

  • acidic cells

  • acidic cells


A.

parietal cells

The parietal cells secrete HCl in the stomach. 

1501 Views

12.

Which one of the following cell organelles is enclosed by a single membrane?

  • Chloroplasts

  • Lysosomes

  • Nuclei

  • Nuclei


B.

Lysosomes

All others except lysosomes have double membrane.

1580 Views

13.

Which one of the following characteristics is not shared by birds and mammals?

  • Breathing using lungs

  • Viviparity

  • Warm-blooded nature

  • Warm-blooded nature


B.

Viviparity

Mammals are viviparous while birds are oviparous. 

1829 Views

14.

Which one of the following statements is wrong?

  • Golden algae are also called desmids

  • Eubacteria are also called false bacteria

  • Phycomycetes are also called algal fungi

  • Phycomycetes are also called algal fungi


B.

Eubacteria are also called false bacteria

3743 Views

15.

Cotyledon of maize grain is called

  • coleorhiza

  • caleoptile

  • scutellum

  • scutellum


C.

scutellum

Large, shield-shaped cotyledon of a grass family is called scutellum. 

Coleorhiza is a sheath protecting the root germinating grass.

Coleoptile is a sheath covering emerging shoot. Plumule is a rudimentary shoot of an embryo plant. 

1506 Views

16.

In mammals, which blood vessel would normally carry largest amount of urea?

  • Dorsal aorta

  • Hepatic vein

  • Hepatic portal vein

  • Hepatic portal vein


B.

Hepatic vein

Urea is synthesised in the liver. So, maximum amount of urea of urea is present in hepatic vein and minimum in Renal vein.  

2766 Views

17.

Which of the following is not a stem modification?

  • thorns of citrus

  • tendrils of cucumber

  • Flattened structures of Opuntia

  • Flattened structures of Opuntia


D.

Flattened structures of Opuntia

Pitcher of nepenthes is a modification of the leaf.

2214 Views

18.

Which of the following guards the opening of hepatopancreatic duct into the duodenum?

  • illeocaecal valve

  • Pyloric sphincter

  • Sphincter of Oddi

  • Sphincter of Oddi


C.

Sphincter of Oddi

Sphincter of Oddi guards the opening of the hepatopancreatic duct into the duodenum.

2019 Views

19.

Which one of the following statements is wrong?

  • cellulose is a polysaccharide

  • Uracil is a pyrimidine

  • Glycine is a sulphur containing amino acid

  • Glycine is a sulphur containing amino acid


C.

Glycine is a sulphur containing amino acid

Glycine does not contain sulphur

1561 Views

20.

Water vapour comes out from the plant leaf through stomatal opening. through the same stomatal opening.  carbon dioxide diffuses into the plant during photosynthesis. Reason out the above statements using the following options

  • Both processes can happen together because the diffusion coefficient of water and CO2 is different

  • The above processes happen only during night time

  • One process occurs during day time and other at night

  • One process occurs during day time and other at night


A.

Both processes can happen together because the diffusion coefficient of water and CO2 is different

Diffusion of water vaour and C0are an independent process. Their diffusion depends on the difference in their ppartial pressure in the atmosphere as well as inside the leaves. 

2302 Views