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MCQOPTIONS
This section includes 11242 Mcqs, each offering curated multiple-choice questions to sharpen your Joint Entrance Exam - Main (JEE Main) knowledge and support exam preparation. Choose a topic below to get started.
| 1601. |
Albumin proteins are most abundant in [BHU 1998] |
| A. | Meat |
| B. | Milk |
| C. | Egg |
| D. | Soyabean |
| Answer» D. Soyabean | |
| 1602. |
Haemoglobin is [CBSE PMT 1997; BHU 2004] |
| A. | An enzyme |
| B. | A globular protein |
| C. | A vitamin |
| D. | A carbohydrate |
| Answer» C. A vitamin | |
| 1603. |
Which of the following enzymes is not useful in the digestion of proteins [KCET 1998] |
| A. | Chymotrypsin |
| B. | Pepsin |
| C. | Trypsin |
| D. | Lipase |
| Answer» E. | |
| 1604. |
What is the monomer of polypeptide [KCET 1998; JIPMER 1999; Pb. CET 2002] |
| A. | Amino acid |
| B. | Glucose |
| C. | Nucleoside |
| D. | Nucleotide |
| Answer» B. Glucose | |
| 1605. |
Which compound can exist in a dipolar (zwitter ion) state [Pb. PMT 1998] |
| A. | \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}CH(N=C{{H}_{2}})COOH\] |
| B. | \[{{(C{{H}_{3}})}_{2}}CH.CH(N{{H}_{2}})COOH\] |
| C. | \[{{C}_{6}}{{H}_{5}}CONHC{{H}_{2}}COOH\] |
| D. | \[HOOC.C{{H}_{2}}C{{H}_{2}}COCOOH\] |
| Answer» C. \[{{C}_{6}}{{H}_{5}}CONHC{{H}_{2}}COOH\] | |
| 1606. |
The proteins with a prosthetic group are called |
| A. | Pseudo proteins |
| B. | Complex proteins |
| C. | Conjugated proteins |
| D. | Polypeptides |
| Answer» D. Polypeptides | |
| 1607. |
Metal present in blood is [CPMT 1997] |
| A. | Al |
| B. | Mg |
| C. | Cu |
| D. | Fe |
| Answer» E. | |
| 1608. |
By the action of enzymes, the rate of biochemical reaction [CBSE PMT 1994] |
| A. | Decreases |
| B. | Increases |
| C. | Does not change |
| D. | Either A or C |
| Answer» C. Does not change | |
| 1609. |
Enzymes belong to which class of compounds [KCET 1996] |
| A. | Polysaccharides |
| B. | Polypeptides |
| C. | Polynitrogen heterocyclic compounds |
| D. | Hydrocarbons |
| Answer» C. Polynitrogen heterocyclic compounds | |
| 1610. |
Amino acids are produced on hydrolysis of [AIIMS 1996] |
| A. | Nucleic acid |
| B. | Carbohydrates |
| C. | Fats |
| D. | Proteins |
| Answer» E. | |
| 1611. |
Enzymes [AIIMS 1996] |
| A. | Accelerate biochemical reactions |
| B. | Have optimum activity at body temperature |
| C. | Consist of amino acids |
| D. | Have all these properties |
| Answer» E. | |
| 1612. |
Which of the following statements about proteins is not true [MP PET 2001] |
| A. | Amino acid residues join together to make a protein molecule |
| B. | Proteins are polymers with formula \[{{({{C}_{6}}{{H}_{10}}{{O}_{5}})}_{n}}\] |
| C. | Eggs are rich in protein |
| D. | Pulses are good source of proteins |
| Answer» C. Eggs are rich in protein | |
| 1613. |
Enzymes in the living systems [ CPMT 1999; AIIMS 2000; CBSE PMT 1997; MP PET 1999;] |
| A. | Provide energy |
| B. | Provide immunity |
| C. | Transport oxygen |
| D. | Catalyse biological processes |
| Answer» E. | |
| 1614. |
Read the following statements carefully Albumin is a simple protein The amino acid alanine contains an acidic side chain Insulin is a hormone Muscles contain the protein keratin Point out the wrong statements in the above set of statements |
| A. | A, B |
| B. | C, D |
| C. | A, C |
| D. | B, D |
| Answer» E. | |
| 1615. |
Proteins are composed of [MP PMT 1995; J & K 2005] |
| A. | \[\alpha -\]amino acids |
| B. | Carbohydrates |
| C. | Vitamins |
| D. | Mineral salts |
| Answer» B. Carbohydrates | |
| 1616. |
Of the following statements about enzymes which ones are true (i) Enzymes lack in nucleophilic groups (ii) Enzymes are highly specific both in binding chiral substrates and in catalyzing their zeactions (iii) Enzymes catalyse chemical reactions by lowering the activation energy (iv) Pepsin is a proteolytic enzyme [CBSE PMT 1995] |
| A. | (i) and (iv) |
| B. | (i) and (iii) |
| C. | (ii), (iii) and (iv) |
| D. | (i) |
| Answer» D. (i) | |
| 1617. |
Secondary structure of a protein refers to [CBSE PMT 1995] |
| A. | Mainly denatured proteins and structures of prosthetic groups |
| B. | Three dimensional structure, specially the bond between amino acid residues that are distant from each other in the polypeptide chain |
| C. | Linear sequence of amino acid residues in the polypeptide chain |
| D. | Regular folding patterns of continuous portions of the polypeptide chain |
| Answer» E. | |
| 1618. |
Which of the following reacts with haemoglobin in the blood to form carboxyhaemoglobin [Manipal MEE 1995] |
| A. | CO |
| B. | \[C{{O}_{2}}\] |
| C. | HCOOH |
| D. | \[{{H}_{2}}C{{O}_{3}}\] |
| Answer» B. \[C{{O}_{2}}\] | |
| 1619. |
The protein that is a structural material is [KCET 1984] |
| A. | Albumin |
| B. | Oxytocin |
| C. | Haemoglobin |
| D. | Keratin |
| Answer» E. | |
| 1620. |
For \[\alpha -\]amino acids having the structure \[R-\underset{N{{H}_{2}}\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,}{\mathop{CH-}}\,}}\,C{{O}_{2}}H\] Which of the following statements are true Water solubility is maximum at a pH when concentrations of anions and cations are equal They give ninhydrin test On reacting with nitrous acid give off \[{{N}_{2}}\] [MP PET 1994] |
| A. | All |
| B. | B and C |
| C. | A and B |
| D. | A |
| Answer» C. A and B | |
| 1621. |
Which of the following is not a classification of proteins [KCET 1984] |
| A. | Enzymes |
| B. | Antibodies |
| C. | Antigens |
| D. | Hormones |
| Answer» D. Hormones | |
| 1622. |
The molecular weight of protein is [KCET 1984] |
| A. | < 10000 |
| B. | > 10000 |
| C. | > 1000 |
| D. | > 1000 and < 10000 |
| Answer» C. > 1000 | |
| 1623. |
Which one of the following is an amino acid [KCET 1984] |
| A. | \[C{{H}_{3}}CON{{H}_{2}}\] |
| B. | \[C{{H}_{3}}CONHC{{H}_{3}}\] |
| C. | \[C{{H}_{3}}NHCHO\] |
| D. | \[N{{H}_{2}}C{{H}_{2}}.COOH\] |
| Answer» E. | |
| 1624. |
Biuret test is used for the detection of [KCET 1993] |
| A. | Saturated oils |
| B. | Sugars |
| C. | Proteins |
| D. | Fats |
| Answer» D. Fats | |
| 1625. |
The proteins which are insoluble in water are |
| A. | Fibrous proteins |
| B. | Globular proteins |
| C. | Both A and B |
| D. | None of these |
| Answer» B. Globular proteins | |
| 1626. |
The enzyme ptylin used for the digestion of food is present in [CPMT 1981; Pb. PMT 2004] |
| A. | Saliva |
| B. | Blood |
| C. | Intestines |
| D. | Adrenal glands |
| Answer» B. Blood | |
| 1627. |
Which of the following contains the highest percentage of protein [CPMT 1984] |
| A. | Groundnut |
| B. | Cow's milk |
| C. | Egg |
| D. | Wheat |
| Answer» B. Cow's milk | |
| 1628. |
Protein can be most easily removed from [MNR 1988] |
| A. | Alkanes |
| B. | Alkenes |
| C. | Alkynes |
| D. | Benzene |
| Answer» E. | |
| 1629. |
The end product of protein digestion is [CPMT 1981; KCET 1984] |
| A. | Amino acid |
| B. | Glucose |
| C. | Glycerol |
| D. | Oxalic acid |
| Answer» B. Glucose | |
| 1630. |
Protein contains [CPMT 1975; MP PMT 2002] |
| A. | \[C,\,\,H,\,\,O\] and N |
| B. | Only C and H |
| C. | \[Cl,\,\,H\] and \[O\] |
| D. | All of these |
| Answer» B. Only C and H | |
| 1631. |
The helical structure of proteins is established by [CPMT 1988] |
| A. | Peptide bonds |
| B. | Dipeptide bond |
| C. | Hydrogen bond |
| D. | Vander Waal's forces |
| Answer» D. Vander Waal's forces | |
| 1632. |
Which of the following foodstuffs contains nitrogen [DPMT 1986; MH CET 2002] |
| A. | Carbohydrates |
| B. | Fats |
| C. | Proteins |
| D. | None of these |
| Answer» D. None of these | |
| 1633. |
pH in stomach is approximately |
| A. | 7 |
| B. | 2.0 |
| C. | 6.5 |
| D. | 10 |
| Answer» C. 6.5 | |
| 1634. |
Proteins can be used |
| A. | As food |
| B. | In textile |
| C. | As enzyme |
| D. | All of these |
| Answer» E. | |
| 1635. |
Peptides are |
| A. | Esters |
| B. | Salts |
| C. | Amides |
| D. | Ketones |
| Answer» D. Ketones | |
| 1636. |
Which is an essential constituent of diet [AFMC 1980] |
| A. | Starch |
| B. | Glucose |
| C. | Carbohydrate |
| D. | Protein |
| Answer» E. | |
| 1637. |
Enzymes are [MP PET 1993] |
| A. | Living organisms |
| B. | Dead organisms |
| C. | Complex nitrogenous substances produced in living cells |
| D. | None of these |
| Answer» D. None of these | |
| 1638. |
Which one of the following proteins transports oxygen in the blood stream [MP PMT 1993] |
| A. | Myoglobin |
| B. | Insulin |
| C. | Albumin |
| D. | Haemoglobin |
| Answer» E. | |
| 1639. |
The main structural feature of proteins is [MNR 1987; MP PET 1993, 97, 2004] |
| A. | The ester linkage |
| B. | The ether linkage |
| C. | The peptide linkage |
| D. | All of these |
| Answer» D. All of these | |
| 1640. |
Proteins are built up of [CPMT 1981, 99; BHU 1987; CBSE PMT 2001; MP PMT 1987, 96; KCET 1984] |
| A. | Dicarboxylic acids |
| B. | Amino acids |
| C. | Alcohols |
| D. | Hydroxy acids |
| Answer» C. Alcohols | |
| 1641. |
Enzymes are [DPMT 1980; MP PMT 1993, 96] |
| A. | Proteins |
| B. | Minerals |
| C. | Oils |
| D. | Fatty acids |
| Answer» B. Minerals | |
| 1642. |
Proteins when heated with conc. \[HN{{O}_{3}}\] give a yellow colour. This is [CPMT 1989] |
| A. | Oxidising test |
| B. | Xanthoprotic test |
| C. | Hoppe's test |
| D. | Acid-base test |
| Answer» C. Hoppe's test | |
| 1643. |
Isoelectric point is a |
| A. | Specific temperature |
| B. | Suitable concentration of amino acid |
| C. | Hydrogen ion concentration that does not allow migration of amino acid under electric field |
| D. | Melting point of an amino acid under the influence of electric field |
| Answer» D. Melting point of an amino acid under the influence of electric field | |
| 1644. |
Insulin is [CBSE PMT 1991] |
| A. | An amino acid |
| B. | Protein |
| C. | A carbohydrate |
| D. | A lipid |
| Answer» C. A carbohydrate | |
| 1645. |
Reaction \[\begin{matrix} R \\ R \\ \end{matrix}>C=O\underset{KOH/\text{glycol}}{\mathop{\xrightarrow{{{H}_{2}}NN{{H}_{2}}}}}\,\begin{matrix} R \\ R \\ \end{matrix}>C |
| A. | Wolff?Kishner reaction |
| B. | Tischenko reaction |
| C. | Reformatsky reaction |
| D. | Gattermann reaction |
| Answer» B. Tischenko reaction | |
| 1646. |
Only an aldehyde having..... can undergo the aldol condensation [KCET 1998] |
| A. | At least one beta H atom |
| B. | At least one alpha H atom |
| C. | An aromatic ring |
| D. | No alpha H atom |
| Answer» C. An aromatic ring | |
| 1647. |
Clemenson's reduction of ketones is carried out in [BHU 2000] |
| A. | \[{{H}_{2}}\] with Pd catalyst |
| B. | Glycol with \[KOH\] |
| C. | \[LiAl{{H}_{4}}\] in water |
| D. | \[Zn-Hg\] with \[HCl\] |
| Answer» E. | |
| 1648. |
\[A\underset{{{800}^{o}}C}{\mathop{\xrightarrow{\Delta }}}\,C{{H}_{2}}=C=O\], Reactant ?A? in the reaction is [RPMT 2003] |
| A. | \[C{{H}_{3}}C{{H}_{2}}CHO\] |
| B. | \[C{{H}_{3}}CHO\] |
| C. | \[C{{H}_{3}}-\underset{\underset{O}{\mathop{||}}\,}{\mathop{C}}\,-C{{H}_{3}}\] |
| D. | \[{{C}_{2}}{{H}_{5}}OH\] |
| Answer» B. \[C{{H}_{3}}CHO\] | |
| 1649. |
Product in following reaction is \[C{{H}_{3}}MgI+HCHO\to \]Product [RPMT 2003; BHU 1998, 2005; DCE 1999] |
| A. | \[C{{H}_{3}}CHO\] |
| B. | \[C{{H}_{3}}OH\] |
| C. | \[{{C}_{2}}{{H}_{5}}OH\] |
| D. | \[C{{H}_{3}}-O-C{{H}_{3}}\] |
| Answer» D. \[C{{H}_{3}}-O-C{{H}_{3}}\] | |
| 1650. |
\[C{{H}_{3}}CHO\] react with aqueous NaOH solution to form [MP PMT 1992] |
| A. | 3-hydroxy butanal |
| B. | 2-hydroxy butanal |
| C. | 4-hydroxy butanal |
| D. | 3-hydroxy butanol |
| Answer» B. 2-hydroxy butanal | |