Entry Test MCQ :: Biological Molecules

NOTE :ANSWERS ARE PRESENT AFTER 5 MCQs

1.	The branch of biology which deals with the study of chemical compounds and the chemical processes in the fliving organisms is called:
	A. Chemistry B. Biochemistry C. Molocular biology D. Both a and b

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2.	Which one is an organic compound?
	A. CO2 B. Water C. Lipids D. HCI

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3.	Which chemical component has the same % in bacterial as well as the mammalian cell?
	A. Water B. Carbohydrate C. Proteins D. Lipids

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4.	Which chemical component has the greatest contribution in the total mammalian cell weight?
	A. Proteins B. Carbohydrate C. Lipids D. Water

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5.	Reactions in which simple substances are combined to form complex substances are called:
	A. Metabolic reactions B. Catabolic reactions C. Anabolic reactions D. None of these ANSWERS OF ABOVE Five MCQs 1.(b) 2.(c) 3.(a) 4.(d) 5.(c)

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6.	Which one is the basic element of organic compounds ?
	A. Oxygen B. Hydrogen C. Sulphur D. Carbon

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7.	The bond formed when two or more atoms complete their electron shells by sharing electrons is called:
	A. Ionic bond B. Hydrogen bond C. Covalent bond D. Electrovalent bond

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8.	Carbon atom is
	A. Monovalent B. Divalent C. Trivalent D. Tetravalent

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9.	Which bond provides stability to complex carbohydrate molecules?
	A. C-H B. C-O C. C-C D. C-N

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10.	% of water in brain cells is
	A. 20% B. 80% C. 85% D. 90%

ANSWERS OF ABOVE Five MCQs
6.(d) 7.(c) 8.(d) 9.(c) 10.(c)

11.	Which statement is true about an aqueous medium:
	A. Ionic as well as non ionic substance in aqueous media retains their identity. B. Enzymes can not perform catalysis reaction in this medium. C. Ions and molecules move randomly thus are in more favorable state to react with other molecules and ions. D. It is less favorable media for chemical reactions.

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12.	Which of the following substance is most favorable to form structural component of biological membranes?
	A. Hydrophilic Carbohydrates B. Hydrophobic fats. C. Both a and b D. None of these

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13.	The number of calories required to raise the temperature of 1g of water from 15 to 16?C is called?
	A. Specific Heat of Vaporization B. Specific Heat capacity C. Caloric Heat D. Both A and C

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14.	The property of water due to which it works as a temperature stabilizer and hence protect living organisms from sudden thermal changes is:
	A. High specific heat of vaporization B. High specific heat capacity C. Its Dipole nature D. Its liquid state

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15.	Specific heat of vaporization of water is:
	A. 574 Kcal/kg B. 674 Kcal/kg C. 774 Kcal/kg D. 874 Kcal/kg ANSWERS OF ABOVE Five MCQs

11.(C) 12.(B) 13.(B) 14.(B) 15.(A)

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16.	A complex substance which on hydrolysis yields polyhydroxy aldehyde or ketone subunits is called:
	A. Lipid B. Carbohydrate C. Protein D. Carotein

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17.	Cn(H2O)n. is a general formula of :
	A. Monosaccharides B. Oligosaccharides C. Ploysacharides D. Carbohydrates

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18.	Which of the statement is not true for compounds like glycoprotein and glycolipids?
	A. They are conjugated molecules of carbohydrates B. Both have role in the extra cellular matrix of animals and bacterial cell wall C. They are components of biological membranes. D. Both are produced and secreted by endoplasmic reticulum

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19.	Which one are most complex sugar:
	A. Monosaccharides B. Oligosaccharides C. Polysaccharides D. None of these

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20.	Which of the following carbohydrate is tasteless?
	A. Monosaccharide B. Oligosaccharide C. Polysaccharide D. None of these

ANSWERS OF ABOVE Five MCQs

16.(B) 17.(A) 18.(D) 19.(C) 20.(C)