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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.
| 1551. |
The number of possible spatial orientations of an electron in an atom is given by its |
| A. | Spin quantum number |
| B. | Spin angular momentum |
| C. | Magnetic quantum number |
| D. | Orbital angular momentum |
| Answer» D. Orbital angular momentum | |
| 1552. |
When the value of the principal quantum number \[n\] is 3, the permitted values of the azimuthal quantum numbers \[l\] and the magnetic quantum numbers \[m\] , are |
| A. | \[l\]-\[\begin{matrix} 0 \\ 1 \\ 2 \\ \end{matrix}\] \[m\]-\[\begin{matrix} 0 \\ +1,\,0,\,-1 \\ +2,+1,\,\,0,\,-1,-2 \\ \end{matrix}\] |
| B. | \[l\]-\[\begin{matrix} 1 \\ 2 \\ 3 \\ \end{matrix}\] \[m\]-\[\begin{matrix} 1 \\ +2,\,1,\,-1 \\ +3,+2,\,\,1,\,-2,-3 \\ \end{matrix}\] |
| C. | \[l\]-\[\begin{matrix} 0 \\ 1 \\ 2 \\ \end{matrix}\] \[m\]-\[\begin{matrix} 0 \\ 1,\,\,2,\,3 \\ +3,\,+2,\,1,\,-2,-3 \\ \end{matrix}\] |
| D. | \[l\]-\[\begin{matrix} 1 \\ 2 \\ 3 \\ \end{matrix}\] \[m\]-\[\begin{matrix} 0,\,\,1 \\ 0,\,\,1,\,\,2 \\ 0,\,\,1,\,\,2,\,\,3 \\ \end{matrix}\] |
| Answer» B. \[l\]-\[\begin{matrix} 1 \\ 2 \\ 3 \\ \end{matrix}\] \[m\]-\[\begin{matrix} 1 \\ +2,\,1,\,-1 \\ +3,+2,\,\,1,\,-2,-3 \\ \end{matrix}\] | |
| 1553. |
The electronic configuration of the element of atomic number 27 is |
| A. | \[1{{s}^{2}},\ 2{{s}^{2}}2{{p}^{6}},\ 3{{s}^{2}}3{{p}^{6}},\ 4s\ (\uparrow \downarrow )\ 4p\ (\uparrow \downarrow )(\uparrow \downarrow )(\uparrow \downarrow )\ 5s\ (\uparrow )\] |
| B. | \[1{{s}^{2}},\ 2{{s}^{2}}2{{p}^{6}},\ 3{{s}^{2}}3{{p}^{6}}3d\ (\uparrow \downarrow )(\uparrow \downarrow )(\uparrow \downarrow ),\ 4s\ (\uparrow \downarrow )\ 4p\ (\uparrow )\] |
| C. | \[1{{s}^{2}},\ 2{{s}^{2}}2{{p}^{6}},\ 3{{s}^{2}}3{{p}^{6}},\ 3d\ (\uparrow \downarrow )(\uparrow \downarrow )(\uparrow \downarrow )(\uparrow \downarrow ),\ 4s\ (\uparrow )\] |
| D. | \[1{{s}^{2}},\ 2{{s}^{2}}2{{p}^{6}},\ 3{{s}^{2}}3{{p}^{6}},\ 3d\ (\uparrow \downarrow )(\uparrow \downarrow )(\uparrow )(\uparrow )(\uparrow )\ 4s\ (\uparrow \downarrow )\] |
| Answer» E. | |
| 1554. |
All electrons on the \[4p\] sub-shell must be characterized by the quantum number(s) [MP PET 1996] |
| A. | \[n=4,\,m=0,\,s=\pm \frac{1}{2}\] |
| B. | \[l=1\] |
| C. | \[l=0,\,s=\pm \frac{1}{2}\] |
| D. | \[s=\pm \frac{1}{2}\] |
| Answer» C. \[l=0,\,s=\pm \frac{1}{2}\] | |
| 1555. |
A \[3p\]orbital has [IIT 1995] |
| A. | Two spherical nodes |
| B. | Two non-spherical nodes |
| C. | One spherical and one non-spherical nodes |
| D. | One spherical and two non-spherical nodes |
| Answer» D. One spherical and two non-spherical nodes | |
| 1556. |
Be's 4th electron will have four quantum numbers [MNR 1985] |
| A. | \[n\]- 1 \[l\]- 0 \[m\]- 0 \[s\]- +1/2 |
| B. | \[n\]- 1 \[l\]- 1 \[m\]- +1 \[s\]- +1/2 |
| C. | \[n\]- 2 \[l\]- 0 \[m\]- 0 \[s\]- -1/2 |
| D. | \[n\]- 2 \[l\]- 1 \[m\]- 0 \[s\]- +1/2 |
| Answer» D. \[n\]- 2 \[l\]- 1 \[m\]- 0 \[s\]- +1/2 | |
| 1557. |
The bond that determines the secondary structure of proteins is or secondary structure of protein is due to [NCERT 1984; MP PET 1996; MP PMT 1997] |
| A. | Coordinate bond |
| B. | Covalent bond |
| C. | Hydrogen bond |
| D. | Peptide bond |
| Answer» D. Peptide bond | |
| 1558. |
Which synthesis was done by Stainley Millar [CPMT 1979] |
| A. | Amino acid |
| B. | Protein |
| C. | Virus |
| D. | Vitamin |
| Answer» B. Protein | |
| 1559. |
A biological catalyst is essentially [BHU 2004] |
| A. | An enzyme |
| B. | A carbohydrate |
| C. | An amino acid |
| D. | A nitrogen compound |
| Answer» B. A carbohydrate | |
| 1560. |
Identify the correct statement regarding enzymes [AIEEE 2004] |
| A. | Enzymes are specific biological catalysts that cannot be poisoned |
| B. | Enzymes are normally heterogeneous catalysts that are very specific in their action |
| C. | Enzymes are specific biological catalysts that can normally function at very high temperature (T ~ 1000K) |
| D. | Enzymes are specific biological catalysts that possess well-defined active sites |
| Answer» E. | |
| 1561. |
Which one of the following structures represents the peptide chain [CBSE PMT 2004; CPMT 2003; DCE 2002; MP PET 1994; Bihar MEE 1997; Orissa JEE 1997] |
| A. | \[-\overset{H}{\mathop{\overset{|}{\mathop{N}}\,}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{O}{\mathop{\underset{||}{\mathop{C}}\,}}\,-\overset{H}{\mathop{\overset{|}{\mathop{N}}\,}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{O}{\mathop{\underset{||}{\mathop{C}}\,}}\,-\overset{H}{\mathop{\overset{|}{\mathop{N}}\,}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-\] |
| B. | \[-\overset{H}{\mathop{\overset{|}{\mathop{N}}\,}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-\underset{H}{\mathop{\underset{|}{\mathop{N}}\,}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\overset{H}{\mathop{\overset{|}{\mathop{N}}\,}}\,-\underset{O}{\mathop{\underset{||}{\mathop{C}}\,}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\] |
| C. | \[-\overset{H}{\mathop{\overset{|}{\mathop{N}}\,}}\,-\underset{O}{\mathop{\underset{||}{\mathop{C}}\,}}\,-\underset{H}{\mathop{\underset{|}{\mathop{N}}\,}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-NH-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-NH-\] |
| D. | \[-\overset{H}{\mathop{\overset{|}{\mathop{N}}\,}}\,-\underset{O}{\mathop{\underset{||}{\mathop{C}}\,}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\overset{H}{\mathop{\overset{|}{\mathop{N}}\,}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\] |
| Answer» B. \[-\overset{H}{\mathop{\overset{|}{\mathop{N}}\,}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-\underset{H}{\mathop{\underset{|}{\mathop{N}}\,}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\overset{H}{\mathop{\overset{|}{\mathop{N}}\,}}\,-\underset{O}{\mathop{\underset{||}{\mathop{C}}\,}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\] | |
| 1562. |
Which enzyme convert glucose into alcohol [Pb. CET 2003] |
| A. | Invertase |
| B. | Zymase |
| C. | Maltase |
| D. | Diastase |
| Answer» C. Maltase | |
| 1563. |
Which of the following is used in our body as a fuel for muscles and nerves and to build and repair body tissues? [DCE 2003] |
| A. | Cane sugar |
| B. | Fructose |
| C. | Proteins |
| D. | Glucose |
| Answer» D. Glucose | |
| 1564. |
Amino acids are |
| A. | Liquids |
| B. | Volatile solids |
| C. | Non-volatile crystalline compounds |
| D. | Mixture of amines and acids |
| Answer» D. Mixture of amines and acids | |
| 1565. |
The pH value of the solution in which a particular amino acid does not migrate under the influence of an electric field in called the [Kerala (Med.) 2003] |
| A. | Eutectic point |
| B. | Yielding point |
| C. | Neutralisation point |
| D. | Effusion |
| E. | Isoelectric point |
| Answer» F. | |
| 1566. |
Which part of the protein molecule is responsible for function and activity of the proteins [AMU 2002] |
| A. | Secondary structure |
| B. | Peptide bond |
| C. | Primary structure |
| D. | Binding sites |
| Answer» C. Primary structure | |
| 1567. |
Which amino acid has aromatic ring [CPMT 2003] |
| A. | Alamine |
| B. | Glycine |
| C. | Tyrosine |
| D. | Lysine |
| Answer» D. Lysine | |
| 1568. |
Which of the following could act as a propellant or rockets [CBSE PMT 2003] |
| A. | Liquid hydrogen + liquid nitrogen |
| B. | Liquid oxygen + liquid argon |
| C. | Liquid hydrogen + liquid oxygen |
| D. | Liquid nitrogen +liquid oxygen |
| Answer» D. Liquid nitrogen +liquid oxygen | |
| 1569. |
Among the following, the achiral amino acid is [AIIMS 2003] |
| A. | 2-Ethylalanine |
| B. | 2-Methylglycine |
| C. | 2-Hydroxymethyl serine |
| D. | Tryptophan |
| Answer» D. Tryptophan | |
| 1570. |
The main structural of protein is [UPSEAT 2000, 02] |
| A. | The ester linkage |
| B. | The ether linkage |
| C. | The peptide linkage |
| D. | All of these |
| Answer» D. All of these | |
| 1571. |
a-helix is found in [Kerala (Engg.) 2002] |
| A. | DNA |
| B. | RNA |
| C. | Lipid |
| D. | Protein |
| Answer» E. | |
| 1572. |
Identify the incorrect statement [Kerala (Med.) 2003] |
| A. | An octa deca peptide contains 18 amino acid residues and 17 peptide bonds |
| B. | Addition of an inert gas into a system in thermodynamic equilibrium for the dissociation of \[PC{{l}_{5}}\] shifts the equilibrium to the left. |
| C. | When gold dissolves in aquaregia the complex formed is chloroauric acid |
| D. | In the extraction of aluminium purified bauxite is dissolved in molten fluorospar |
| E. | If the pH value of a solution is to be decreased from 5 to 3, the hydrogen ion concentration must be increased twice the initial value. |
| Answer» F. | |
| 1573. |
Which one of the following biomolecules is insoluble in water [AIIMS 2005] |
| A. | a- Keratin |
| B. | Haemoglobin |
| C. | Ribonuclease |
| D. | Adenine |
| Answer» B. Haemoglobin | |
| 1574. |
A nanopeptide contains ??.. peptide linkages [KCET 2005] |
| A. | 10 |
| B. | 8 |
| C. | 9 |
| D. | 18 |
| Answer» C. 9 | |
| 1575. |
Chlorophyll contains [RPMT 2002] |
| A. | \[Fe\] |
| B. | \[Na\] |
| C. | \[Mg\] |
| D. | \[Zn\] |
| Answer» D. \[Zn\] | |
| 1576. |
Which of the following is not essential amino acid |
| A. | Valine |
| B. | Lysine |
| C. | Histidine |
| D. | Glycine |
| Answer» E. | |
| 1577. |
Enzymes are made up of [CBSE PMT 2002] |
| A. | Carbohydrates |
| B. | Edible proteins |
| C. | Nitrogen containing carbohydrates |
| D. | Proteins with specific structure |
| Answer» E. | |
| 1578. |
The example of a protein is [MP PET 2003] |
| A. | Narvone |
| B. | Lacithin |
| C. | Cellulose |
| D. | Insulin |
| Answer» E. | |
| 1579. |
Excess of \[N{{a}^{+}}\] ions in our system causes [BHU 2001] |
| A. | High B.P. |
| B. | Low B.P. |
| C. | Diabetes |
| D. | Anaemia |
| Answer» B. Low B.P. | |
| 1580. |
Antibodies are [CBSE PMT 2001] |
| A. | Carbohydrate |
| B. | Globular protein |
| C. | Immunoglobulins |
| D. | Cellulose compounds |
| Answer» E. | |
| 1581. |
Which of the following protein destroys the antigen when it enters in body cell [AIIMS 2001; Pb. PMT 2004 ] |
| A. | Antibodies |
| B. | Insulin |
| C. | Chromoprotein |
| D. | Phosphoprotein |
| Answer» B. Insulin | |
| 1582. |
Amino acids are the building blocks of [MH CET 2001] |
| A. | Fat |
| B. | Vitamin |
| C. | Protein |
| D. | Carbohydrate |
| Answer» D. Carbohydrate | |
| 1583. |
Which a amino acid can cross link peptide chains [AIIMS 2001] |
| A. | Serine |
| B. | Cysteine |
| C. | Glutamine |
| D. | Tyrosine |
| Answer» C. Glutamine | |
| 1584. |
The optically inactive amino acid is [MP PMT 2001; BHU 2005] |
| A. | Lysine |
| B. | Glycine |
| C. | Arginine |
| D. | Alanine |
| Answer» C. Arginine | |
| 1585. |
When collagen is boiled with water, it forms |
| A. | Precipitate |
| B. | Solution |
| C. | Gelatin |
| D. | Complex collagen |
| Answer» D. Complex collagen | |
| 1586. |
The helical structure of proteins is stabilized by [MP PMT 2001] |
| A. | Peptide bonds |
| B. | Dipeptide bond |
| C. | Hydrogen bond |
| D. | Vander Waal's forces |
| Answer» D. Vander Waal's forces | |
| 1587. |
Which of the following is not a function of proteins [MP PMT 2001] |
| A. | Nails formation |
| B. | Skin formation |
| C. | Muscle formation |
| D. | Providing energy for metabolism |
| Answer» E. | |
| 1588. |
The test used for identifying peptide linkage in proteins is [KCET (Engg.) 2001] |
| A. | Borsche's test |
| B. | Molisch's test |
| C. | Ninhydrin test |
| D. | Biuret test |
| Answer» E. | |
| 1589. |
A biological catalyst is essentially [Pb. PMT 2000; BHU 2004] |
| A. | A carbohydrates |
| B. | An amino acids |
| C. | A nitrogen molecule |
| D. | Fats |
| Answer» C. A nitrogen molecule | |
| 1590. |
The decomposition of complex organic compounds into simpler compound with the help of enzyme is known as [Pb. PMT 2000] |
| A. | Catabolism |
| B. | Anabolism |
| C. | Fermentation |
| D. | Metabolism |
| Answer» D. Metabolism | |
| 1591. |
Pick out wrong combination [DCE 2000] |
| A. | \[F{{e}^{+2}}\to \] Haemoglobin |
| B. | \[M{{g}^{2+}}\to \] Photosynthesis |
| C. | \[S{{e}^{2+}}\to \] Kreb Cycle |
| D. | \[C{{O}^{+2}}\to \] Vitamin B-12 |
| Answer» D. \[C{{O}^{+2}}\to \] Vitamin B-12 | |
| 1592. |
The number of essential amino acids in man is [CBSE PMT 2000] |
| A. | 8 |
| B. | 10 |
| C. | 18 |
| D. | 20 |
| Answer» C. 18 | |
| 1593. |
Which of the following is a conjugated protein [BHU 2000] |
| A. | Glycoprotein |
| B. | Phosphoprotein |
| C. | Chromoprotein |
| D. | All of these |
| Answer» E. | |
| 1594. |
The 10% energy transfer law of food chain was given by [BHU 2000] |
| A. | Stanley |
| B. | Weismann |
| C. | Lindemann |
| D. | Tansley |
| Answer» D. Tansley | |
| 1595. |
The most important energy carrier in all the living cells is [MP PET 2000; KCET 2000] |
| A. | AMP |
| B. | ATP |
| C. | ADP |
| D. | UDP |
| Answer» C. ADP | |
| 1596. |
The prosthetic group of haemoglobin is |
| A. | Porphin |
| B. | Haem |
| C. | Globin |
| D. | Globulin |
| Answer» C. Globin | |
| 1597. |
Amino acids usually exist in the form of Zwitter ions. This means that it consists of [KCET 2000] |
| A. | The basic group \[N{{H}_{2}}\] and the acidic group \[-COOH\] |
| B. | The basic group \[-NH_{3}^{+}\] and the acidic group \[-C{{O}_{2}}\] |
| C. | The basic group \[-CO_{2}^{-}\] and the acidic group \[NH_{3}^{+}\] |
| D. | No acidic or basic group |
| Answer» D. No acidic or basic group | |
| 1598. |
Leucine amino acids is the [Pb. PMT 1999] |
| A. | Essential |
| B. | Non-essential |
| C. | Aromatic |
| D. | Basic |
| Answer» B. Non-essential | |
| 1599. |
Which one of the following is an example of a globular protein [Orissa JEE 1997] |
| A. | Keratin |
| B. | Insulin |
| C. | Collagen |
| D. | Myoglobin |
| Answer» E. | |
| 1600. |
Dialysis can separate [BHU 1998] |
| A. | Glucose and fructose |
| B. | Glucose and sucrose |
| C. | Glucose and NaCl |
| D. | Glucose and proteins |
| Answer» E. | |