MCQs on Biomolecules for class 12 NEET | pdf
Multiple Choice Questions on Biomolecules mcqs for NEET pdf
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Multiple Choice Questions on Biomolecules mcqs for NEET pdf
1) which of the following carbohydrates is monosacharider?
a) Glucose
b) fructose
c) Galactose
d) Ribose
Answer -: c
2) Which of the following is a polysaccharide?
a) Cellulose
b) Sucrose
c) Galactose
d) Malose
Answer -: a
3) Maltose is hydrolysed in the presence of maltase to________
a) Glucose
b Glucose and fructose
c) Glucose and galactose
d) fructose
Answer -: a
4) The disaccharide present in milk is________
a) Maltose
b) Lactose
e) Sucrose
d) Cellobiose
Answer -: b
5) Which of the following is a ketohexose?
a) fructose
b) glucose
C) Ribose
d) Starch
Answer -: a
6) Which of the following has maximum Sweetness?
a) Glucose
b) Fructose
c) Sucrose
d) Maltose
Answer -: b
7) Which of the following does not give silver mirror with Tollen’s reagent?
a) Sucrose
b) Glucose
c) Factose
d) Lactose
Answer -: a
8) glucose is oxidised to carbon dioxide and water with oxygen in the presence of enzyme.
a) Maltose
b) d-amylase
c) Lactose
d) Oxidase
Answer -: d
9) The change in optical rotation of a freshly pre- pared solution of glucose with time is called______
a) Specific rotation
b) Optical inversion
c) Muta rotation
d) Racemisation
Answer -: c
10) Which of the following is not a α-amino acid ?
a) Serine
b) Aspartc acid
c) Phenylalanine
d) Thymine
Answer -: d
11) Alanine is__________
a) an enzyme
b) purine base of nucleic acid
c) hormone
d) α-amino acid
Answer -: d
12) Glycine reacts witlh nitrous acid to give_______
a )Glycine nitrite
b) Methyl alcohol and methylamine
c) Glycolic acid
d) Ethyl glycinate
Answer -: c
13) Which of the following carbohydrate is found most abundantly in nature?
a) Glucose
b) Fructose
c) Starch
d) Cellulose
Answer -: a
14) Hydrolysis of sugar is called_____
a) saponitication
b) amutarotauon
c) inversion
d) diesterlicato
Answer -: c
15) Fat consists of________
a) Monohydroxy carboxylic acid
b) Monohydroxy aliphatic carboxylic acid
c) Monohydroxy aliphatic, saturated carboxylic acid
d) Dihydroxyl aliphatic carboxylic acid
Answer -: c
16) Vegetable oils are________
a) gycerides of unsatarated fatty acids
b) gycerides of saturated fatty acids
C) sodium salts of higher fatyy acids
d) mixture of sodium and potassium salts of lower acids
Answer -: a
17) phospholipids are esters of glycerol with_______
a) three phosphate groups
b) three carboxylic acid residues
c) two carboxylic acid residues and one phosphate groups
d) one carboxylic acid residues and one phosphate groups
Answer -: c
18) One gram of fat gives_______
a) same amount of energy as one gram at carbohydrate
b) Same amount of energy as one gram of protein
C) More thantwice the energy as one gram or carbohydrate or proten
d) less energy thanone gram of
carbohydrate or protein
Answer -: c
19) What happens when highly unsaturated oils are exposed to light and moist air?
a) isomerisation
b) polymerisation
c) rancidification
d) fermentation
Answer -: c
20) Animal fats are giycerides of_____
a) fatty acids
b) saturated fatty acids
c) saturated aliphatic acids
d) saturated aliphatic monocarboxylic acids
Answer -: d
21) Which of the following statements are not true?
a) Fats and oils are stored source of energy
b) They provide more energy than proteins or carbonydrates
c) They help m absorbng the vitamins A and D
d) Fats are soluble in water
Answer -: d
22) Which one of the following is not an oil?
a) linseed oil
b) paratfin oil
c) coconut oil
d) groundnut oil
Answer -: b
23) Vitamin D is also known as_______
a) growth vitamins
b) ascorbic acid
c) reproducive vitamin
d) sunshine vitamin
Answer -: d
24) Which of the folllowing vitamins present in cod-liver oil?
a) A
b) B12
c) C
d) B1
Answer -: a
25) Which of the followings protein hormones?
a) oxytocin
b) insluln
c) both (a) and (b)
d) ribose
Answer -: c
26) insulin, a protein acts as_______
a) an antibody
b) hommone
C) an enzyme
d) a transport agent
Answer -: b
27) The most abundant organic constituents of plants are_______
a) alcohols
b) carbohydrates
c) proteins
d) fats
Answer -: b
28) Aldotetroses consist of two chiral carbon atoms and they exist in _____
a) 2 optically active torms
b) 8 optically active torms
c) 4 optically active forms
d) 6 optically active forms
Answer -: c
29) Magnesium is present in ______
a) casein
b) keratin
c) haemoglobin
d) chlorophyll
Answer -: d
30) Iron is a constituent of_______
a) haemoglobin
b) chlorophyll
c) hormones
d) proteins
Answer -: a
31) Glucose gives silver mirror test with Tollen’s reagent.
It shows the presence of_______
a) aldehydic group
b) ketonic group
c) acidic group
d) alcoholic group
Answer -: a
32) The colour of precipitate formed when a reducing sugar is heated with Tollen’s reagent?
a) Blue
b) Green
c) Brown
d) Gray
Answer -: d
33) The most important food reserves of animals are________
a) carbohydrates
b)vitamins
c) proteins
d) fats
Answer -: d
34) Oxidation of glucose by dil. HNO, gives glucaric acid .This reaction suggest that the presence of______
a) aldehyde group
b) 1°- alcoholic group
c) 2°- alcoholic group
d) ketone group
Answer -: b
35) Maltose is made up of_________
a) α-D-glucose
b) D-gluctose
c) α-D-ghucose and b-D-glucose
d) glucose and fructose
Answer -: a
36) D-ghucose and D-galactose differ in configuration at________
a) C-1
b) C-2
c) C-3
d) C-4
Answer -: d
37) α-(D) (-)fructose and β-(D)(-) fructose are______
a) anomers
b) epimers
c) diastereoisomers
d) tautonmers
Answer -: a
38) ln cyclic structure of maltose, acetal bond is formed between______
a) C-2 of one glucopyranose and C-2 of another glucopyranose
b) C-1 of one glucopyranose and C-2 of another glucopyranose
c) C-l of one glucopyranose and C-4 of another glucopyranose
d) Cl ot one glucopyranose and C4 of another glucopyranose
Answer -: c
39) Maltose contain_________
a) 2-4-α-d-acetal bond
b) 1-2-α-acetal bond
c) 1-4-β-acetal bond
d) 1-4-α-acetal bond
Answer -: d
40) Glucose is said to have-CHO group. Which of the following reaction 1S not expected with glucose______
a) it does not form oxime
b) it does not react with RMgX reagent
c) it does not reduce Tollen’s reagent
d) it does not form osazone
Answer -: b