JEE Main & Advanced Chemistry Biomolecules / जैव-अणु Question Bank

done Mock Test - Biomolecules Total Questions - 25

• question_answer1)
  Which of the following pairs give positive Tollen's test?
  A)
  Glucose, sucrose done clear
  B)
  Glucose, fructose done clear
  C)
  Hexanal, acetophenone done clear
  D)
  Fructose, sucrose done clear
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• question_answer2)
  The correct statement about the following disaccharide is
  A)
  Ring (1) is pyranose with \[\alpha \]-glycosidic link done clear
  B)
  Ring (1) is furanose with \[\alpha \]-glycosidic link done clear
  C)
  Ring (2) is furanose with \[\alpha \]-glycosidic link done clear
  D)
  Ring (2) is pyranose with \[\beta \]-glycosidic link done clear
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• question_answer3)
  The number of disulphide linkages present in insulin is
  A)
  4                      done clear
  B)
  3 done clear
  C)
  2                      done clear
  D)
  1 done clear
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• question_answer4)
  Which one of the following is not correct?
  A)
  d(-) Fructose exists in furanose structure done clear
  B)
  d(+) Glucose exists in pyranose structure done clear
  C)
  In sucrose the two monosaccharides are held together by peptide linkage done clear
  D)
  Maltose is a reducing sugar done clear
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• question_answer5)

  Which of the statements about "Denaturation" given below are correct?

  (1) Denaturation of proteins causes loss of secondary and tertiary structure of the proteins.

  (2) Denaturation leads to the conversion of double strand of DNA into single strand.

  (3) Denaturation affects primary structure which gets distorted.

  A)
  (2) and (3)         done clear
  B)
  (1) and (3) done clear
  C)
  (1) and (2)         done clear
  D)
  (1), (2) and (3) done clear
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• question_answer6)
  Which of the following is not a fat soluble vitamin?
  A)
  Vitamin B complex done clear
  B)
  Vitamin D done clear
  C)
  Vitamin E          done clear
  D)
  Vitamin A done clear
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• question_answer7)
  How many pairs in the gene are needed to code for the enzyme, lysozyme, containing 129 amino acids found in egg white?
  A)
  \[3\text{ }\times \text{ }129\] base pairs done clear
  B)
  \[\left( 3\times 129 \right)+\left( 3\times 3 \right)=396\]base pairs done clear
  C)
  \[\left( 3\times 129 \right)+\left( 3\times 2 \right)=393\]base pairs done clear
  D)
  4\[\times \]129 base pairs done clear
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• question_answer8)

  Consider the following statements about haemoglobin.

  (1) It has four separate peptide subunits: Two identical \[\alpha \]-chains and two identical \[\beta \]-chains each bonded to haeme.

  (2) In CO poisoning, since much of the haemoglobin is ied up with CO, \[{{O}_{2}}\] transport to the tissues is inhibited.

  (3) Normal haemoglobin found in red blood cells has a glutamic acid residue. The correct statements are

  A)
  I and II  done clear
  B)
  II and III done clear
  C)
  I and III done clear
  D)
  All of these done clear
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• question_answer9)
  Which of the following statements is incorrect?
  A)
  Vitamins are included in diet because they are not synthesized in the human body done clear
  B)
  A person with diabetes mellitus suffers from hypoglycemia done clear
  C)
  Most vitamins function as coenzymes done clear
  D)
  Hypoglycemia can affect the brain due to low blood sugar level done clear
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• question_answer10)
  X controls the process of burning of fats, proteins and carbohydrates and liberate energy in the body X is
  A)
  thyroxine                       done clear
  B)
  adrenaline done clear
  C)
  cortisone done clear
  D)
  insulin done clear
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• question_answer11)
  Peptides are formed by the joining of amino acids through amide linkage. Which of the following statement is not true in this respect?
  A)
  Amide groups do not contribute in the hydrogen bonding interactions done clear
  B)
  \[p\pi \] resonance stabilizes the amide linkages done clear
  C)
  Amide groups are more resistant to hydrolysis than the similar ester groups done clear
  D)
  Stable conformations of peptides are restricted to those having planar amide groups done clear
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• question_answer12)
  Identity X, Y and Z from the information given below: X = A chiral amino acid which loses its chirality on treatment with lithium aluminum hydride. Y= the decarboxylation product of a-amino (secondary) acid, \[{{C}_{5}}{{H}_{9}}{{O}_{2}}N\]. Z = It is formed when A (\[{{C}_{3}}{{H}_{4}}{{O}_{3}}\]) is treated with (i) \[N{{H}_{3}}\](ii) \[NaB{{H}_{4}}\] [A forms oxime, gives iodoform test and liberate \[C{{O}_{2}}\] with \[NaHC{{O}_{3}}\]].
  A)

  X	YZ
  Alanine	Serine

  done clear
  B)

  X	YZ
  Serine	Alanine

  done clear
  C)

  X	YZ
  Serine	Alanine

  done clear
  D)

  X	YZ
  Aspartic acid	Serine

  done clear
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• question_answer13)
  \[Ph-CH=0\xrightarrow{HCN+KOH}X\xrightarrow{PC{{l}_{5}}}Y\xrightarrow[(ii){{H}_{2}}{{O}^{\oplus }}]{(i)N{{H}_{3}}}Z\]will be
  A)
  done clear
  B)
  done clear
  C)
           done clear
  D)
  done clear
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• question_answer14)
  Select the correct statement about the following disaccharide?
  A)
  Ring A is an acetal in the\[\beta \]-configuration; ring B is a hemiacetal in the \[\alpha \]-configuration done clear
  B)
  Ring A is an acetal in the \[\alpha \]-configuration; ring B is a hemiacetal in the \[\beta \]-configuration done clear
  C)
  Ring A is a hemiacetal in the \[\alpha \]-configuration; ring B is an acetal in the \[\beta \]-configuration done clear
  D)
  Ring A is a hemiacetal in the \[\beta \]-configuration; ring B is an acetal in the \[\alpha \]-configuration. done clear
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• question_answer15)
  The correct statement about the following disaccharide is
  A)
  Ring (I) is pyranose with \[\alpha \]-glycosidic link done clear
  B)
  Ring (I) is furanose with \[\alpha \]-glycosidic link done clear
  C)
  Ring (II) is furanose with \[\alpha \]-glycosidic link done clear
  D)
  Ring (II) is pyranose with \[\beta \]-glycosidic link done clear
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• question_answer16)
  Which two of the following compounds are reduced to the same chiral alditol by sodium borohydride?

  I.

  II.

  III.

  IV.

  A)
  II and III            done clear
  B)
  I and II done clear
  C)
  III and IV           done clear
  D)
  II and IV done clear
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• question_answer17)
  Identify the correct set of stereochemical relationships amongst the following monosaccharides I-IV

  I.

  II

  III.

  IV.

  A)
  I and II are anomers; III and IV are epimers done clear
  B)
  I and II are epimers; II and IV are anomers done clear
  C)
  I and III are anomers; I and II are epimers done clear
  D)
  I and II are epimers; III and IV are anomers done clear
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• question_answer18)
  Which of the following indicates the presence of 5 -OH groups in glucose?
  A)
  Penta-acetyl derivative of glucose done clear
  B)
  Cyanohydrin formation of glucose done clear
  C)
  Reaction with Fehling's solution done clear
  D)
  Reaction with Tollens reagent done clear
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• question_answer19)
  Acetone may be obtained from starch by the action of
  A)
  acid                  done clear
  B)
  bacteria done clear
  C)
  oxidizing agent done clear
  D)
  none of these done clear
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• question_answer20)
  Two hexoses form the same osazone, find the correct statement about these hexoses.
  A)
  Both of them must be aldoses done clear
  B)
  They are epimers at C-3 done clear
  C)
  The carbon atoms 1 and 2 in both have the same configuration done clear
  D)
  The carbon atoms 3, 4 and 5 in both have the same configuration done clear
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• question_answer21)
  What is the number of carbon at6ms in the ketone used to prepare \[\varepsilon \]-aminovaleric acid, a monomer for nylon category?
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• question_answer22)
  Consider the given structure, When this molecule is kept in acidic medium, x and y positions gets protonated readily. What is the sum of x and Y?
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• question_answer23)
  Consider an amylase chain of 4000 glucose units. How many cleavage are required to lower the average length to 400 units?
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• question_answer24)
  Some of the pair of monosaccharides are given below:

  (I) Allose, atrose	(II) Glucose, fructose
  (III) Glucose, mannose	(IV) Mannose, fructose
  (V) Glucose, indose	(VI) Galactose, talose
  (VII) Galactose, glucose	(VIII) Indose, glucose

  How many of the above pairs are C-2 epimers?
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• question_answer25)
  A decapeptide (Mol. Wt. 796) on complete hydrolysis gives glycine (Mol. Wt. 75), alanine and phenylalanine. Glycine contributes 47.0% to the total weight of the hydrolysed products. The number of glycine units present in the decapeptide is
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