Q.1.
What is Guanine?
-
40%
a) Purine
-
0%
b) Hormone
-
20%
c) Enzyme
-
40%
d) Pyrimidine
Q.2.
Protoplasm is formed of .... .... [ RPMT 1998]
-
0%
a) O, P, minerals
-
33%
b) H, C, Iron
-
33%
c) O, N, Iron
-
33%
d) O, C, H, N
Q.3.
Phosphorus is present in .... .... [ JKCMEE 2005]
-
0%
a) Protein
-
0%
b) DNA
-
0%
c) RNA
-
100%
d) Both b and c
Q.4.
In DNA, adenine pairs with ... ... [ MPPMT 1992]
-
0%
a) Guanine
-
100%
b) Thymine
-
0%
c) Cytosine
-
0%
d) Uracil
Q.5.
"Lock and Key" model of enzyme action illustrate that a particular enzyme molecule .... ...[ DPMT 2009]
-
50%
a) Is destroyed and resynthesized several times
-
0%
b) reacts at the same rate in all conditions
-
50%
c) Interacts with specific type of substrate molecule
-
0%
d) Forms a permanent enzyme -substrate complex
Q.6.
Enzymes joining two molecules by establishing covalent bonds are .... .... [ kerala 2002]
-
50%
a) Ligase
-
0%
b) Transferases
-
50%
c) Oxidoreductases
-
0%
d) Lyases
Q.7.
Km value of enzyme is substrate concentration at ... ... [ BHU 2001]
-
0%
a) 1/4 Vmax
-
0%
b) 2Vmax
-
100%
c) 1/2 Vmax
-
0%
d) 4Vmax
Q.8.
Fehling's solution can detect ... .... [ CBSE 2001]
-
0%
a) Glucose
-
50%
b) Sucrose
-
50%
c) Starch
-
0%
d) Fat
Q.9.
Optimum temperature is the temperature at which an enzyme ... ..
-
100%
a) Works at its best
-
0%
b) Is not destroyed
-
0%
c) Action is reversed
-
0%
d) Is inactivated
Q.10.
Decreasing order concentration of minerals inside cell is .... .. [ Har PMT 1994]
-
50%
a) Ca-K-Na
-
0%
b) K-Ca-Na
-
50%
c) K-Na-Ca
-
0%
d) Na-K-Ca
Q.11.
Essential-non-essential amino acid is ... ...[ AMU 2010]
-
50%
a) Lysine - Leucine
-
50%
b) Valine - tyrosine
-
0%
c) Methionine - Threonine
-
0%
d) Alanine - Cystine
Q.12.
Cellulose is made of ... ... [ AIIMS 2007]
-
0%
a) Unbranched chain of glucose molecules linked by α-1, 6 glycosidic bonds
-
50%
b) unbranched chain of glucose molecules inked by β-1, 4 glycosidic bonds
-
0%
c) Branched chain of glucose molecules having α1, 6 glycosidic bonds at the site of branching
-
50%
d) Branched chain of glucose molecules with α-1, 6 glycosidic bonds in the straight chain and β-1, 4 linked bonds at the site of branching
Explanation
Q.13.
An essential amino acid is ... ... [ AMU 2003 ]
-
50%
a) Tryptophan
-
0%
b) Glycine
-
0%
c) Lutamine
-
50%
d) Tyrosine
Q.14.
Chemical nature of cellulose is .... .... [ KCET 2004]
-
0%
a) Disaccharide
-
0%
b) Polypeptide
-
100%
c) Polysaccharide
-
0%
d) Polynucleotide
Q.15.
Quaternary structure of protein ... .... [ WB 2008]
-
100%
a) Consists of 4 subunits
-
0%
b) Is either α or β
-
0%
c) Is unrelated to its functions
-
0%
d) Is dictated by primary structure of individual subunits
Q.16.
Moisturizing gel is extracted from ... ... [ Odisha 2004]
-
0%
a) Saraca indica
-
100%
b) Aloe vera
-
0%
c) Acacia vestita
-
0%
d) None of the above
Q.17.
One of the following is not a carbohydrate .... .... [ RPMT 1995 ]
-
0%
a) Maltose
-
50%
b) Pepsin
-
0%
c) Cellulose
-
50%
d) Ascorbic acid
Q.18.
Which one is polymerized to yield proteins? ... .... [ DPMT 1999 ]
-
50%
a) Amino acids
-
0%
b) Muramic acid
-
0%
c) Monosaccharaides
-
50%
d) All the above
Q.19.
A typical homopolysaccharide is ... .... [ WB 2011]
-
50%
a) Starch
-
50%
b) Lignin
-
0%
c) Insulin
-
0%
d) Suberin
Q.20.
The activity of succinate dehydrogenase is inhibited by ... .... [ AMU 1992]
-
50%
a) Malonate
-
0%
b) Pyruvate
-
50%
c) Glycolate
-
0%
d) Phosphoglycerate
Q.21.
Assertion: Enzymes lower the activation energy of the reactant molecule to make the transition into product easier Reason: Enzymes are highly substrate specific ... ... [ AIIMS 2011]
-
50%
a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion
-
50%
b) The Assertion and Reason are true but Reason is not correct explanation of Assertion
-
0%
c) Assertion is true but, Reason is false
-
0%
d) Assertion is false but, Reason is true
Q.22.
Nomenclature of enzyme consists of ... ... [ Pb PMT 2000 ]
-
100%
a) First substrate name and then reaction name
-
0%
b) First reaction name and then product name
-
0%
c) Only product name
-
0%
d) Only reaction name
Q.23.
Km value is dependent upon ... ..[ Har PMT 2003]
-
0%
a) Temperature
-
50%
b) Substrate concentration
-
0%
c) Enzyme concentration
-
50%
d) All the above
Q.24.
Select the specific base pairs of DNA:
-
0%
a) Adenine and Cytosine
-
0%
b) Guanine and Adenine
-
100%
c) Adenine and Thymine
-
0%
d) Guanine and Uracil
Q.25.
Which one promotes softening of fruits? ... .. [ kerala 2008]
-
0%
a) Polygalacturonase
-
100%
b) Polyethylene glycol
-
0%
c) Colchicine
-
0%
d) Cellulase
Q.26.
Which group has the same distance class ... ... [ HPPMT 2001]
-
0%
a) Sterols, Waxes, Amino acids, Starch
-
100%
b) Lipids, RNA, Glycine, Cellulose
-
0%
c) DNA, RNA, Nucleosides, Nucleotides
-
0%
d) Ribose, Sucrose, Glucose, Maltose
Q.27.
A unit composed of sugar and nitrogen base linked by glycosidic bond is ... ...[ AIIMS 1997]
-
0%
a) Purine
-
0%
b) Glycoside
-
100%
c) Nucleoside
-
0%
d) Nucleotide
Q.28.
Tertiary structure of proteins having amino acid cysteine is achieved through ... ... [ kerala 2003]
-
0%
a) Ionic bonds
-
0%
b) Covalent bonds
-
50%
c) Disulphide bonds
-
50%
d) Hydrogen bonds
Explanation
Q.29.
Ribose is ... ... [ [ MPPMT 2011]
-
50%
a) Monosaccharide
-
0%
b) Disaccharide
-
0%
c) Polysaccharide
-
50%
d) Heteropolymer
Q.30.
RNA contains ... ..... [ JIPMER 1998]
-
0%
a) Hexose sugar
-
0%
b) Dextrose sugar
-
100%
c) Ribose sugar
-
0%
d) Deoxyribose sugar
Q.31.
Membrane permeability is controlled by ... ... [ CPMT 1992]
-
0%
a) Na+
-
0%
b) K+
-
100%
c) Both a and b
-
0%
d) Ca2+
Q.32.
Enzymes, vitamins and hormones are common in ... ... [ BHU 1997]
-
0%
a) Being proteinaceous
-
100%
b) Being synthesised in the body of organisms
-
0%
c) Enhancing oxidative metabolism
-
0%
d) Regulating metabolism
Q.33.
Lipids are insoluble in water as they are .... ... [ CBSE 2002]
-
50%
a) Hydrophilic
-
0%
b) Hydrophobic
-
50%
c) Zwitterions
-
0%
d) Neutral
Q.34.
Which one is the hydrogen acceptor? .... .... [ AFMC 1991]
-
0%
a) CoA
-
50%
b) NADP+
-
50%
c) ATP
-
0%
d) DNA
Q.35.
Major role of minor elements inside living organisms is to act as .... ..... [ CBSE 2003]
-
0%
a) Cofactor of enzymes
-
50%
b) Binder of cell structure
-
50%
c) Constituent of hormones
-
0%
d) Building blocks of amino acids
Q.36.
A substance unrelated to substrate but capable of reversibly changing active site is called .... .. [ JKCMEE 2003]
-
0%
a) Competitive inhibitor
-
50%
b) Non-competitive inhibitor
-
0%
c) Catalytic inhibitor
-
50%
d) Allosteric modulator/inhibitor
Q.37.
Enzyme hexokinase is inhibited by excess glucose 6-P. It is .... ... [ Har.PMT 1996]
-
0%
a) Competitive inhibition
-
100%
b) Feed-back allosteric inhibition
-
0%
c) Non-competitive inhibition
-
0%
d) Positive feed-back
Q.38.
Ribose sugar is not a component of ... ... [ MHT CET 2009]
-
0%
a) AMP
-
0%
b) ATP
-
100%
c) DNA
-
0%
d) RNA
Q.39.
Which is structural polysaccharide .... ...
-
50%
a) Glycogen
-
0%
b) Chitin
-
50%
c) Keratin
-
0%
d) Pectin
Q.40.
A nucleoside is formed of ... .... [ BHU 2000]
-
0%
a) Pentose sugar, phosphate and nitrogen base
-
0%
b) Phosphate and nitrogen base
-
50%
c) Pentose sugar and phosphate
-
50%
d) Pentose sugar and nitrogen base
Q.41.
Molecules having charged group of opposite polarity are .... ... [ DPMT 2010]
-
100%
a) Zwitterions
-
0%
b) Anions
-
0%
c) Cations
-
0%
d) Negative ions
Q.42.
Sulphur containing amino acid is ... ... [ WB 2008]
-
0%
a) Methionine
-
0%
b) Cystine
-
0%
c) Cysteine
-
100%
d) All the above
Explanation
Q.43.
Sucrose is ... ..... [ Odisha 2007]
-
0%
a) Monosaccharaide
-
100%
b) Disaccharide
-
0%
c) Trisaccharide
-
0%
d) Polysaccharide
Q.44.
Iodine test can detect ... .. [ KCET 1993]
-
100%
a) Carbohydrates
-
0%
b) Nucleic acids
-
0%
c) Lipids
-
0%
d) Proteins
Q.45.
In the genera formula of amino acid stated below. Here R stands for ... ...
-
50%
a) An amino acid
-
0%
b) A carboxylic group
-
50%
c) A variable group
-
0%
d) A hydroxyl group
Q.46.
An important step in the manufacture of pulp in paper industry from woody tissues of plants is ... .... [ CBSE 2005]
-
50%
a) Preparation of pure cellulose by removing lignin
-
50%
b) Treatment of wood with chemicals for breakdown of cellulose
-
0%
c) Removal of oil by suitable chemicals
-
0%
d) Removal of water from wood by prolonged heat at 50°C
Q.47.
An enzyme brings about ... .... [ CBSE 1993]
-
0%
a) Decrease in reaction time
-
0%
b) Increase in reaction time
-
50%
c) Increase in activation energy
-
50%
d) Reduction in activation energy
Q.48.
Lipids provide insulation against cold and hot weather to exoskeleton of insects in form of
-
0%
a) cutin
-
0%
b) waxes
-
100%
c) cholesterol
-
0%
d) oil
Q.49.
Joining of repeating units to fom a macromolecule is called ... ... [ Pb PMT 1997]
-
0%
a) Polymerization
-
0%
b) Aggregation
-
100%
c) Polymorphism
-
0%
d) Condensation
Q.50.
Single letter symbol F is used for the amino acid ... ... [ BHU 1993]
-
0%
a) Phenylalanine (Phe)
-
50%
b) Proline (Pro)
-
50%
c) Tryptophan (Try)
-
0%
d) Methionine (Met)