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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
Give an example for nonessential amino acids? |
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Answer» Glutamic acid. |
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| 102. |
Amino acids may be acidic, alkaline or neutral. How does this happen? What are essential and nonessential amino acids? Name one of each type. |
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Answer» This is due to presence of carboxylic acid as well as amino groups. Amino acids which contain two -COOH group and one —NH2 group are called acidic amino acid, e.g., aspartic acid. Amino acids which contain two —NH2 group and one -COOH group are called basic amino acids, e.g., lysine. Amino acids which contain one -COOH and one —NH2 group are called neutral amino acids, e.g., glycine. Amino acids that cannot be synthesized by the body and must be supplied in the diet are called essential amino acids, e.g., lysine, valine, leucine, etc. The amino acids which are synthesized by our body are called non-essential amino acids, e.g. alanine, glycine, etc. |
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| 103. |
A competitive inhibitor of succinic dehydrogenase isA. `alpha`-ketoglutarateB. MalateC. MalonateD. Oxaloacetate |
| Answer» Correct Answer - C | |
| 104. |
Cellulose, the most important constituent of plant cell wall is made up ofA. unbranched charn of glucose molecules linked by a 1 4-glycos1d1c bondB. branched chain of glucose molecules linked by p 1, 4-glycosidic bond in straight chain and a, 1, 6 -glycos1dic bond at the site of branchingC. unbranched chain of glucose molecules linked by p 1, 4-glycosidic bondD. branched chain of glucose molecules linked by a 1, 6-glycosidic bond at the site of branching |
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Answer» Correct Answer - C Cellulose `(C_(6)H_(10)O_(5))_(n)` is the most abundant organic polymer. It is a polysaccharide and consists of long unbranched chains of glucose residues linked by `beta`1-4 glycosidic bonds. In plants, cellulose is formed from sugar. It serves as building material in the formation of cell wall. |
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| 105. |
Lactose is composed ofA. glucose + glucoseB. glucose + fructoseC. fructose + galactoseD. glucose + galactose |
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Answer» Correct Answer - D Lactose `(C_(12)H_(22)O_(11))` is a disaccharide found in mammalian milk. It comprises of galactose and glucose units which are linked together by `beta`,1-4 glycosidic bonds. It is a reducing sugar. |
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| 106. |
Lactose is composed ofA. glucose + glucoseB. glucose+fructoseC. glucose+galactoseD. fructose+galactose |
| Answer» Correct Answer - C | |
| 107. |
lactose is composed ofA. Glucose+galactoseB. Fructose +galactoseC. Glucose + fructoseD. Glucose + glucose |
| Answer» Correct Answer - A | |
| 108. |
Lactose is composed ofA. glucose +galactoseB. glucose + fructoseC. glucose + glucoseD. glucose +mannose |
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Answer» Correct Answer - A |
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| 109. |
lactose is composed ofA. Glucose + GalactoseB. Glucose +FructoseC. Glucose +glucoseD. Glucose +Mannose |
| Answer» Correct Answer - A | |
| 110. |
An organic substance bound to and enzyme and essential for its activity is called Or Non-protein part of an enzyme is known asA. ApoenzymeB. IsoenzymeC. CoenzymeD. Holoenzyme |
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Answer» Correct Answer - C (c) Coenzymes are loosely attached complex non-protein, low molecular weight, thermostable, organic or mettalo-organic groups. Which readily separate from the apoenzyme. |
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| 111. |
An organic substance bound to an enzyme and essential for its activity is calledA. aponezymeB. isoenzymeC. conenzymeD. holoennzyme |
| Answer» Correct Answer - C | |
| 112. |
An organic substance bound to an enzyme and essential for its activity is calledA. CoenzymeB. HoloenzymeC. ApoenzymeD. Isoenzyme |
| Answer» Correct Answer - A | |
| 113. |
An organic substance bound to and enzyme and essential for its activity is called Or Non-protein part of an enzyme is known asA. IsoenzymeB. CoenzymeC. ApoenzymeD. Holoenzyme |
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Answer» Correct Answer - B (B) An organic substance bound to an enzyme and essential for its acitivity is coenzymes. |
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| 114. |
Which of the following is the contractile protein of a muscle?A. ActinB. MyosinC. TrpoponinD. tropomyosin |
| Answer» Correct Answer - B | |
| 115. |
An organic substance bound to an enzyme and essential for its activity is calledA. ApoenzymeB. IsoenzymeC. CoenzymeD. Holoenzyme |
| Answer» Correct Answer - C | |
| 116. |
the main area of various types of activitesA. Plasma membraneB. MitochdrionC. cytoplasmD. Nucleus |
| Answer» Correct Answer - C | |
| 117. |
Variations in proteins are due toA. sequence of maino acidsB. Number of amino acidsC. R-groupD. None |
| Answer» Correct Answer - A | |
| 118. |
which of the following does not cotatin metal ?A. GlycoproteinsB. FerritinC. CytochomesD. Chromoproteins |
| Answer» Correct Answer - A | |
| 119. |
units of proteins which unite in ling chains to form proteins are calledA. SugarB. PurinesC. pyrmidinesD. Amino acids |
| Answer» Correct Answer - D | |
| 120. |
For its activity, carboxypeptidase requiresA. NiacinB. CopperC. ZincD. Iron |
| Answer» Correct Answer - C | |
| 121. |
For its activity, carboxypeptidase requiresA. CopperB. ZincC. IronD. Niacin |
| Answer» Correct Answer - B | |
| 122. |
Among cellulose, poly (vinyl chloride), nylon and natural rubber, the polymer in which the intermolecular force of attraction is weakest isA. nylonB. poly (vinyl chloride)C. celluloseD. natural rubber |
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Answer» Correct Answer - D |
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| 123. |
An enzyme that can stimulate germination of barley seeds isA. proteaseB. invertaseC. `alpha`-amylaseD. lipase |
| Answer» Correct Answer - C | |
| 124. |
Atherogenic lipoproteins are all EXCEPTA. LDLB. HDLC. VLDLD. Chylomicrons |
| Answer» Correct Answer - B | |
| 125. |
How many molecules of fatty acids occur in a lipid (fat) molecule ?A. OneB. TwoC. ThreeD. Four or five |
| Answer» Correct Answer - C | |
| 126. |
A fat molecule has three fatty acids. A Phos- pholipid molecule has how many fatty acids?A. 3B. 2C. 1D. 0 |
| Answer» Correct Answer - B | |
| 127. |
the graph given in Fig.9.36 shows the effect of substrate concentration on the rate of reaction of the enzyme green-gram -phosphatase . What does the graph indicates ? A. the rate of enzyme reaction is directly proportional to the substrate concentrationB. Presence of an enzyme inhibitor in the reaction mixture .C. Formation of an anzyme-substrate complex.D. At higher substrate concentration , the pH increases `H^(+) "cone" darr` |
| Answer» Correct Answer - D | |
| 128. |
Figure given below shows three velocity-substrate concentration curves for an enzyme reaxtion. What do the curves for an enzyme reaction. What do the curves depict A. a- normal enzyme reaction b- competitive inhibition c- non-competitive inhibitionB. a-enzyme with an allosteric modulator-added b-normal enzyme acitivity c- competitive inhibitionC. a-enzyme with an allosteric stimulator b- competitve inhibitor added c- normal enzyme reactionD. a-normal enzyme reaction b-non-competitive inhibitor added c- allosteric inhibitor added |
| Answer» Correct Answer - A | |
| 129. |
The given graph shows the effect of substrate concentration on the rate of reaction of the enzymes green gram-phosphatase. What does the graph indicate ? A. The rate of enzyme reaction is directly proportional to the substrate concentration.B. Pressence of an enzyme inhibitor in the reaction mixture.C. Formation of an enzyme-substrate complex.D. At higher substrate concentration the pH increase. |
| Answer» Correct Answer - B | |
| 130. |
In which one of the following sets of three items each belong to the category mentioned against them ?A. Lysine, glycine, thiamine-Amino acidB. Myosin, oxytocin and gastrin- HormonesC. Rennin, helicase and hyaluronidase-EnzymeD. Optic nerve, oculomotor, vagus-Sensory nerves |
| Answer» Correct Answer - C | |
| 131. |
Assertion : The heterocyclic compounds in nucleic acid are the nitrogenous bases. Reason : Adenine and guanine are substituted pyrimidines while uracil, cytosine and thymine are substituted purines. |
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Answer» Correct Answer - C Nucleic acids are polynucleotides. A nucleotide has three chemically distinct components. One is a heterocyclic compound, the second is a monosaccharide and the third a phosphoric acid or phosphate. The heterocyclic compounds in nucleic acids are the nitrogenous bases named adenine, guanine, uracil, cytosine and thymine. Adenine and guanine are substituted purines while the rest are substituted pyrimidines formed from the skeletal heterocyclic rings purine and pyrimidine, respectively. |
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| 132. |
(i) Which one of the following is a disaccharide :Starch, Maltose, Fructose, Glucose ?(ii) What is the difference between fibrous protein and globular protein ?(iii) Write the name of vitamin whose deficiency causes bone deformities in children. |
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Answer» (i) Maltose (ii) Fibrous proteins: parallel polypeptide chain, insoluble in water. Globular proteins: spherical shape, soluble in water. (iii) Vitamin D Detailed Answer: (i) Maltose is disaccharide.
(iii) The deficiency of vitamin D causes bone deformities in children. |
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| 133. |
Biochemical reagents are widely used for detection of biomolecules. A reagent that specifically detects a carbonyl group (C=0) in a biomolecule will yield a positive test withA. proteinB. fatty aicdC. carbohydrateD. all of these |
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Answer» Correct Answer - B Fatty acids are organic acids having hydrocarbon chains that end in a carboxylic group `(-COOH)`. |
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| 134. |
Why water soluble vitamins must be supplied regularly in the diet? Give one example of it. |
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Answer» Because they are excreted in urine and cannot be stored in body; Vitamin C/B1/ B6 . |
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| 135. |
The active site of a biomolecule R is shown below The biomolecule R binds to a tripeptide because its binding site is complementry to that of tripeptide. The shape of the tripeptide would be Note : Complimentarity in the figure is shown by shapeA. B. C. D. |
| Answer» Correct Answer - D | |
| 136. |
Biochemical reagents are widely used for detection of biomolecules. A reagent that specifically detects a carbonyl group (C=0) in a biomolecule will yield a positive test withA. proteinB. carbohydrateC. FatsD. all of these |
| Answer» Correct Answer - B | |
| 137. |
Give one example each for water-soluble vitamins and fat-soluble vitamins ? |
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Answer» Water soluble vitamin vitamin C/Vitamin B1(Thiamine) Fat soluble vitamin - A/Vitamin D |
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| 138. |
Give one example each of water soluble and fat soluble vitamins. |
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Answer» Water soluble - VitB/C, Fat soluble - Vit A/D/E/K/B12 |
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| 139. |
Enzymes are absent inA. AlgaeB. FungiC. BacteriaD. Virus |
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Answer» Correct Answer - D (d) Viruses are acellular organisms. |
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| 140. |
Which one of the following statements is incorrectA. In competitive inhibition, the inhibitor molecule is not chemically changed by the enzymeB. The competitive inhibitor does not affect the rate of breakdown of the enzyme-substrate complexC. The presence of the competitive inhibitor decreases the Km of the enzme for the substrateD. A competitive inhibitor reacts reversibly with the enzyme to form an enzyme-inhibitor complex |
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Answer» Correct Answer - C (c) In competitive inhibition, km value increases. |
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| 141. |
Enzyme catalysing optical or geomatrical rearrangement of atomic groupings without altering molecular weight or number of atoms isA. LigasesB. IsomeraseC. OxidoreductasesD. Hydrolase |
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Answer» Correct Answer - B (B) Enzyme catalysing optical or geomertical rearrangement of atomic grouping without altering molecular weight or number of atoms is isomerase. |
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| 142. |
Write the main structural difference between `DNA` and `RNA`. Of the four bases, common to both `DNA` and `RNA`. |
| Answer» Adenine, Guanine and Cytosine of H atom and OH group around `C_(1)` carbon. | |
| 143. |
Write the main structural difference between DNA and RNA. Of the four bases, name those which are common to both DNA and RNA. |
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Answer» Structural difference between DNA and RNA.
The common bases present in both DNA and RNA are adenine (A), guanine (G) and cytosine (C). |
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| 144. |
Glucose is also known as dextrose becauseA. it has D-configurationB. it has L- configurationC. it is dexto rotatoryD. it is leavo rotatory |
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Answer» Correct Answer - D |
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| 145. |
Bases common to RNA and DNA areA. adenine, guanine, cytosineB. adenine , uracil, cytosineC. adenine, guanine, thymineD. guanine, uracil, thymine. |
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Answer» Correct Answer - A Adenin, guanine and cytosine are present in both RNA and DNA. DNA contains thymines while RNA contains uracil. |
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| 146. |
Which amine hormone control function of sympathetic nervous system?A. thyroxineB. progestronC. adrenalineD. insulin |
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Answer» Correct Answer - C |
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| 147. |
If one strand of DNA has the sequence ATGCTTGA, the sequence in the complimentary strand would beA. TCCGAACTB. TACGTAGTC. TACGAATCD. TACGAACT |
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Answer» Correct Answer - D In a DNA molecule, `A=T, C-=G` . So, the complimentary sequence of ATGCTTGA is TACGAACT |
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| 148. |
Which of the following is an amine hormone ?A. InsulinB. progestroneC. ThyroxineD. Oxypurin |
| Answer» Correct Answer - C | |
| 149. |
In DNA, the complimentary bases areA. adenine and guanine, thymine and cytosineB. uracil and adenine , cytosine and gaunineC. Adenine and thymine, guanine and cytosineD. adenine and thymine , guanine and uracil |
| Answer» Correct Answer - C | |
| 150. |
In DNA, the complimentary bases areA. uracil and adenine, cytosine , cytosine and guanineB. adenine and thymine , guanine and cytosineC. adenine and thymine, guanine and uracilD. adenine and guanine , thymine and cytosine |
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Answer» Correct Answer - B `A=T, C-=G` |
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