Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

Which of the following are found in extreme saline
conditions?

  • Archaebacteria

  • Eubacteria

  • Cyanobacteria

  • Mycobacteria


A.

Archaebacteria

9353 Views

2.

A temporary endocrine gland in the human body is

  • Pineal gland

  • Corpus cardiacum

  • Corpus luteum

  • Corpus allatum


C.

Corpus luteum

Corpus luteum is the temporary endocrine structure formed in the ovary after ovulation. It is responsible for the release of the hormones like progesterone, oestrogen etc.

2783 Views

3.

Select the mismatch :

  • Frankia – Alnus

  • Rhodospirillum – Mycorrhiza

  • Anabaena – Nitrogen fixer

  • Rhizobium – Alfalfa


B.

Rhodospirillum – Mycorrhiza

3009 Views

4.

The hepatic portal vein drains blood to liver from

  • Heart

  • Stomach

  • Kidneys

  • Intestine


D.

Intestine

3626 Views

5.

Which one of the following statements is correct with reference to enzymes?

  • Apoenzyme = Holoenzyme + Coenzyme

  • Holoenzyme = Apoenzyme + Coenzyme

  • Coenzyme = Apoenzyme + Holoenzyme

  • Holoenzyme = Coenzyme + Cofactor


B.

Holoenzyme = Apoenzyme + Coenzyme

2207 Views

6.

Which cells of 'Crypts of Lieberkuhn' secrete antibacterial lysozyme?

  • Argentaffin cells

  • Paneth cells

  • Zymogen cells

  • Kupffer cells


B.

Paneth cells

– Kupffer-cells are phagocytic cells of liver.
– Zymogen cells are enzyme producing cells.
– Paneth cell secretes lysozyme which acts as anti-bacterial agent.
– Argentaffin cells are hormone producing cells.

2711 Views

7.

Which of the following options gives the correct sequence of events during mitosis?

  • Condensation - nuclear membrane disassembly
    - crossing over - segregation - telophase

  • Condensation - nuclear membrane disassembly
    -arrangement at equator - centromere
    division - segregation - telophase

  • Condensation - crossing over - nuclear
    membrane disassembly - segregation -
    telophase

  • Condensation - arrangement at equator -
    centromere division - segregation -
    telophase


B.

Condensation - nuclear membrane disassembly
-arrangement at equator - centromere
division - segregation - telophase

The correct sequence of events during mitosis would
be as follows
(i) Condensation of DNA so that chromosomes become visible occurs during early to mid-prophase.
(ii) Nuclear membrane disassembly begins at late prophase or transition to metaphase.
(iii) Arrangement of chromosomes at equator occurs during metaphase, called congression.
(iv) Centromere division or splitting occurs during anaphase forming daughter chromosomes.

1908 Views

8.

Adult human RBCs are enucleate. Which of the following statement(s) is/are most appropriate explanation for this feature?

(a) They do not need to reproduce
(b) They are somatic cells
(c) They do not metabolize
(d) All their internal space is available for oxygen
transport

  • Only (d)

  • Only (a)

  • (a), (c) and (d)

  • (b) and (c)


A.

Only (d)

In Human RBCs, nucleus degenerates during maturation which provide more space for oxygen carrying pigment (Haemoglobin). It lacks most of the cell organelles including mitochondria so respires anaerobically

2693 Views

9.

Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen?

  • Bacillus

  • Pseudomonas

  • Mycoplasma

  • Nostoc


C.

Mycoplasma

2163 Views

10.

Which of the following is made up of dead cells?

  • Xylem parenchyma

  • Collenchyma

  • Phellem

  • Phloem


C.

Phellem

Cork cambium undergoes periclinal division and cuts off thick walled suberised dead cork cells towards outside and it cuts off thin walled living cells i.e., phelloderm on inner side.

3388 Views