biology Mcqs
351. On which of the following component of chloroplast chlorophyll is arranged?
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A. Matrix

B. Stroma

C. Cell membrane

D. Thylakoids?
352. Animals obtain carbohydrates mainly from___________?
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A. Sucrose

B. Starch

C. Glucose

D. Glycogen

353. The type of plastids which help in pollination is_________?
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A. All of these

B. Chloroplasts

C. Leucoplasts

D. Chromoplasts
354. lubb sound is produced due to___________________?
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A. Closure of outlet valve

B. Closure of inlet valve

C. Opening of inlet valve

D. Opening of outlet valve

355. Which one of the following is most likely to occur in an animal during winter?
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A. Activation of sweat glands

B. Dilation of skin blood vessels

C. Thermogenesis

D. Panting

356. Antibodies play important role against microorganisms and other pathogens to which type of proteins do they belong________?
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A. Globular proteins

B. Fibrous Proteins

C. Both a and b

D. None of these

357. Which of the following is an autosomal disorder______________?
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A. Klinifelters syndrome

B. Turners syndrome

C. Downs syndrome

D. Jacobs syndrome

358. If more substrate to already occurring enzymatic reaction is added and there is no effect on the rate of the reaction what is the form given to this situation___________?
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A. Saturation

B. Composition

C. Denaturation

D. Inhibition

359. Which one are most complex sugar_____________?
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A. Polysaccharides

B. Monosaccharides

C. Oligosaccharides

D. None of these

360. The active site of an enzyme______________?
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A. Forms no chemical bond with substrate

B. Never changes

C. They are non specific in their action

D. Determined by structure and the specificity of the enzyme
361. The sequence of 3 bases on tRNA which is complementary to condon of mRNA is called____________?
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A. Gene

B. Anticodon

C. Code

D. Codon

362. Which of the following relationship is NOT an example of symbiosis?
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A. Mycorrhizal fungi and tree roots

B. Algae and fungi in a lichen

C. Rhizobium and leguminous plants

D. Marchantia sporophyte and gametophyte
363. Chemical component/s less in eukaryotic cell as compared to prokaryotic cell is / are (i) lipids (ii) carbodydrates (iii) proteins (iv) DNA_________________?
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A. iv only

B. i ii iii & iv

C. i & ii

D. iii & iv

364. Lipid molecules can store double amount of energy as compared to same amount of carbohydrate because of high number of__________________?
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A. C-H bonds

B. C-C bonds

C. C-N bonds

D. C-O bonds

365. Ribonucleo-protein particles are the name of__________?
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A. RNA

B. DNA

C. Nucleus

D. Eukaryotic ribosomes
366. Joints present in skull are example of_______________?
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A. Cartilaginous joints

B. Slightly moveable joints

C. Synovial Joints

D. Fibrous joints
367. Other name for Kingdom monera is_______________?
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A. None of these

B. Archae

C. Prokaryotae

D. Protoctista

368. Which of the following cytoskeletal fiber contain tubulin protein?
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A. One which help in assembly of spindles during mitosis.

B. One involved in internal cell motion.

C. One involved in maintenance of cell shape.

D. Both b and c

369. The word which E-Chatton suggested for bacteria and blue green algae was_____________?
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A. Eu-cariotique

B. Autotrophs

C. Pro-cariotique

D. Heterotrophs

370. Those organisms which can prepare their own food from simple inorganic material and can store energy are called___________?
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A. Heterotrophs

B. Procariotique

C. Autotrophs

D. Eu-cariotique

371. ATP is a an important molecule for its major function___________?
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A. As an energy currency of the cell

B. As a coenzyme

C. Both a and b

D. None of these

372. Number of nuclear pores/nucleus in an RBC are_________?
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A. 3?4?

B. 30000

C. 10000

D. 1?3

373. Chlorophyll molecule contrains __________ as central metal ion.
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A. Mg2+?

B. Cu2+

C. Zn2+

D. Fe2+

374. Which structural organization is most common in globular proteins____________?
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A. Primary

B. Secondary

C. Tertiary

D. Quaternary

375. The one which is not a globular protein__________?
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A. Myosin

B. Enzyme

C. Haemoglobin

D. Anti Rh-antibody

376. The productivity of aquatic ecosystem is basically determined by light and____________?
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A. O2

B. CO2

C. Nutrients

D. Water

377. Most of the cellular secretions are ________ in nature?
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A. Glycolipids

B. Nucleohistones

C. Glycoproteins

D. Proteins

378. Fatty acids containing 18 C atoms and a single double bond is____________?
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A. Saturated Fatty acid

B. Plamitic acid

C. Unsaturated fatty acid

D. Oleic Acid
379. Highest form of learning is__________________?
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A. Latent learning

B. Insight learning

C. Instinct

D. Operant conditioning

380. In which of the following location enzymes controlling cellular respiration are present____________?
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A. Ribosome

B. Chlorophast

C. Milochondria

D. Nucleus

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