biology MCQs – Page 20

Practise multiple-choice questions from biology for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

biology Mcqs
381. Which one is not found in fatty acids in acylglycerols____________?
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A. C-25

B. C-6

C. C-30

D. C-26

382. Resolution power of a compound microscope is___________?
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A. 2-4 A

B. 2.0 ?m

C. 24 ?m

D. 24 A

383. Chlorophyll is a/an _____ molecule?
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A. Organic

B. Anionic

C. Inorganic

D. Cationic

384. Allium cepa is the scientific name of______________?
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A. Potato

B. Amaltas

C. Onion

D. Tomato

385. 60S and 40S subunit combine to form ________ particle.
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A. 90 S

B. 80 S

C. 100 S

D. 70 S

386. Which of the following category is most general with its members lest resembling with each other than the other categries_____________?
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A. Genus

B. Species

C. Order

D. Family

387. The human naked eye can differentiate between two points which are __________ apart?
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A. 1.0 dm

B. 0.1 mm

C. 1.0 cm

D. 1.0 mm
388. A complex substance which on hydrolysis yields polyhydroxy aldehyde or ketone subunits is called__________?
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A. Carotein

B. Carbohydrate

C. Protein

D. Lipid

389. Which of the following hormone is polypeptide in nature____________?
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A. Thyroxine

B. Insulin

C. Cortisone

D. ADH
390. Inhibitors which block the enzyme by forming weak bond are called___________?
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A. Competitive inhibitors.

B. Non-competitive inhibitors

C. Irreversible inhibitors.

D. Both a and b
391. Of the following which one is not the characteristic of mitochondria?
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A. Number of mitochondria is constant

B. It is involved in the synthesis of protein

C. It contains F1 particles

D. It is a self replicating organelle

392. The one which can tolerate highest external osmotic pressure is __________?
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A. Amoeba

B. Bacteria

C. Fungi

D. Algae

393. A compound produced as a result of a chemical reaction of an alcohol with an acid in which water molecule is released is called________________?
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A. Neutral lipid

B. Nucleic acid

C. Fatty acid

D. Monosaccharide

394. The first organism of whose genome was completely discovered was____________?
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A. Human beings

B. None of these

C. Hemophilus Influenza

D. Influenza Virus

395. rRNA constitutes ____________% of the total cellular RNA?
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A. 10-20%

B. 90%

C. 80%

D. 3-4 %

396. Cellular organelles related with H2O2 are___________?
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A. Lysosomes

B. Peroxisomes

C. Ribosomes

D. Glyoxisomes

397. Carbon atom is_____________?
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A. Divalent

B. Trivalent

C. Monovalent

D. Tetravalent
398. The windpipe or trachea lies?
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A. Dorsal to oesophagus

B. Ventral to oesophagus

C. Lateral to oesophagus

D. None of these
399. Which of the following statement is incorrect about Glyoxisomes?
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A. They are abundant in soyabeans but absent in pea.

B. They are signle membranous organelles

C. They contain enzymes which help in conversion of fatty acids into carbohydrate

D. They are present through out life of a plant and provide them whth energy through Glyoxylate cycle.
400. Which of the following carbohydrate can not be hydrolysed__________________?
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A. Monosaccharide

B. Polysaccharide

C. None of these

D. Oligosaccharide