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MCQs with Explanations - Chapter-wise Practice Questions

Q. 23 of Quiz- (Que-ID : 3116)

The enzyme involved in biological nitrogen fixation are

  • Carboxylase
  • Oxygenase
  • Dehydrogenase
  • Nitrogenase

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Directions : (Q.1 - Q.4) find out the correct choice to replace the question mark?

Q. 2 of Quiz- (Que-ID : 529)

House : Roof : : Earth : ?

  • Mountain
  • Air
  • Atmosphere
  • Pole
  • Sky

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Q. 21 of Quiz- (Que-ID : 3389)

Which of the following bacteria is present in the rumen of cattle ?

  • Azotobacter
  • Rhizobium
  • Methanobacterium
  • Azospirillum

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Q. 15 of Quiz- (Que-ID : 3308)

Genetic drift operates only in

  • larger populations
  • Mendelian populations
  • island populations
  • smaller populations.

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Q. 91 of Quiz- (Que-ID : 268)

Silver nitrate should be stored in:

  • Clean, dry white bottle
  • Lead free white bottle
  • Amber coloured white bottle
  • Neutral glass bottle

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Q. 21 of Quiz- (Que-ID : 1281)

If one gm. of dextrose provides 3.4 cal. 1 L of 5% solution of dextrose supplies-

  • 120 cals.
  • 17 cals.
  • 15 cals.
  • 170 cals.

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Q. 2 of Quiz- (Que-ID : 643)

Which one of these is μ-opioid agonist?

  • Pethidine
  • Codeine
  • Nalorphine
  • None of these

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Q. 20 of Quiz- (Que-ID : 1889)

By the amendment the salary of the president of India is-

  • Rs. 50,000
  • Rs. 1,50,000
  • Rs. 75,000
  • 850000

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Q. 30 of Quiz- (Que-ID : 980)

Khamsin is a hot and dry local wind experienced in -

  • Iran
  • Egypt
  • Saudi Arabia
  • Iran

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Q. 10 of Quiz- (Que-ID : 2978)

Each kidney has how many nephrons

  • 1 million
  • 2 million
  • 2 thousand
  • 2 hundred

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Q. 11 of Quiz- (Que-ID : 3254)

Which of the following is a pseudocoelomate?

  • Platyhelminthes
  • Aschelminthes
  • Mollusca
  • Hemi-chordates

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Q. 6 of Quiz- (Que-ID : 1159)

Which one of these is present in compound sulphur lotion as wetting agent?

  • Talc
  • Quillaia tincture
  • Zinc oxide
  • Sodium citrate

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Q. 48 of Quiz- (Que-ID : 135)

The drug included in 'dope test' for athletes is

  • Propranolol
  • Prazocine
  • Dexamphetamine
  • Diazepam

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Q. 24 of Quiz- (Que-ID : 3292)

Bioluminescence is a phenomenon associated with

  • chrysophyta
  • phaeophyta
  • pyrrophyta
  • chlorophyta

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Q. 10 of Quiz- (Que-ID : 3153)

Which of the following is not a polysaccharide?

  • Lactose
  • Starch
  • Glycogen
  • Dextrin

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Q. 9 of Quiz- (Que-ID : 3252)

Which one of the following groups of animals is correctly matched with its one characteristic feature without even a single exception?

  • Mammalia : give birth to young ones
  • Reptilia : possess 3-chambered heart with one incompletely divided ventricle
  • Chordata : possess a mouth provided with an upper and a lower jaw
  • Chondrichthyes : possess cartilaginous endoskeleton

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Q. 2 of Quiz- (Que-ID : 3370)

Which of the following is not used as a biopesticide ?

  • Trichoderma harzianum
  • Nucleopolyhedrovirus
  • Xanthomonas campestris
  • Bacillus thuringiensis

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Q. 8 of Quiz- (Que-ID : 3808)

Protein are precipatetd by

  • Water
  • Sodium hydroxide
  • Formaldehyde
  • Trichloroethane acetic acid

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