1250 Important Biology MCQ Question and Answer PDF

1.Blood is a

  • AConnective tissue
  • BEpithelial tissue
  • CMuscular tissue
  • DReproductive tissue
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Correct Answer : (A)

Connective tissue

Explanation:

2.Tendons and ligaments are

  • AConnective tissue
  • BMuscular tissue
  • CEpithelial tissue
  • DSkeletal  tissue
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Correct Answer : (A)

Connective tissue

Explanation:

3.Which bacterial strain developed from natural isolates by genetic manipulations can be used for treating oil spills?

  • APseudomonas
  • BAgrobacterium
  • CClostridium
  • DNitrosomonas
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Correct Answer : (D)

Nitrosomonas

Explanation:

4.A cellulosic wall is found in the cells of

  • AAnimals
  • BBacteria
  • CFungi
  • DPlants
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Correct Answer : (D)

Plants

Explanation:

5.The largest White Blood Corpuscle is

  • ALymphocyte
  • BMonocyte
  • CThrombocyte
  • DErythrocyte
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Correct Answer : (B)

Monocyte

Explanation:

6.Crossing ? over occurs during

  • ALeptotene
  • BZygotene
  • CPachytene
  • DDiplotene
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Correct Answer : (C)

Pachytene

Explanation:

7.Beak is formed by

  • ACheeks
  • BJaws
  • CTeeth
  • DNone
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Correct Answer : (B)

Jaws

Explanation:

8.Cell becomes turgid because of

  • APlasmolysis
  • BExosmosis
  • CEndosmosis
  • DDiffusion
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Correct Answer : (C)

Endosmosis

Explanation:

9.The process of imbibition involves

  • ADiffusion
  • BCapillary action
  • CAbsorption
  • DBoth (a) and (b)
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Correct Answer : (C)

Absorption

Explanation:

Imbibition is a process of absorption of water by solid particles of a substance without forming a solution.
The substance which absorbs the water is called imbitants, and the liquid is called imitate. For the imbibition process to occur, the imitate needs to be hydrophilic as a hydrophobic substance cannot imbibe. Imbibition plays an essential role in the growth and development of plants.

10.A cell increases in volume when it is placed in

  • AHypertonic solution
  • BHypotonic solution
  • CIsotonic solution
  • DNone of these
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Correct Answer : (B)

Hypotonic solution

Explanation:

11.Intercalary meristems are found in

  • ANode
  • BLateral bud
  • CTerminal bud
  • DInter node
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Correct Answer : (D)

Inter node

Explanation:

12.Leaves of many grasses are capable of folding and unfolding because

  • ATheir mesophyll is not differentiated into palisade and spongy parenchyma
  • BThey have stomata on both sides of the leaf 
  • CThey have high levels of silica
  • DThey have specialised bulli-form cells
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Correct Answer : (D)

They have specialised bulli-form cells

Explanation:

13.Bacterial cells do not have

  • ACell wall
  • BPlasma membrane
  • CRibosome
  • DMitochondria
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Correct Answer : (D)

Mitochondria

Explanation:

14.A parenchyma cell which stores ergastic substance is known as

  • APhragmoblast
  • BIdioblast
  • CConidioplast
  • DChloroplast
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Correct Answer : (B)

Idioblast

Explanation:

15.Number of mitochondria in bacterial cell is

  • AOne
  • BTwo
  • CMany
  • DZero
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Correct Answer : (D)

Zero

Explanation:

16.The largest cells in mammalian blood are

  • AErythrocytes
  • BMonocytes
  • CBasophils
  • DLymphocytes
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Correct Answer : (B)

Monocytes

Explanation:

17.In human body, ligaments are made up of 

  • AWhite fibres and some yellow elastic fibres
  • BWhite fibres only
  • CYellow fibres only
  • DYellow fibres and muscle fibres
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Correct Answer : (A)

White fibres and some yellow elastic fibres

Explanation:

18.Which of the following organism possesses characteristics of a plant and animal?

  • AEuglena
  • BMycoplasma
  • CParamecium
  • DChlorella
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Correct Answer : (A)

Euglena

Explanation:

19.A prokaryotic cell does not have which of the following?

  • ARibosomes
  • BCell membrane
  • CNucleus
  • DDNA
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Correct Answer : (C)

Nucleus

Explanation:

20.Which of the following insect has its scientific name as Blattaria?

  • ABeetle
  • BCockroach
  • CMosquito
  • DButterfly 
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Correct Answer : (B)

Cockroach

Explanation: