McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: All India Pre Medical Test (AIPMT) .
Chapters
| 51. |
Which of the following will be characteristically different in different living organism? |
| A. | Protein |
| B. | Nucleic acid |
| C. | Enzyme |
| D. | Carbohydrate |
| Answer» B. Nucleic acid | |
| 52. |
Which one is not a polymer? |
| A. | ATP |
| B. | Hemoglobin |
| C. | Nucleotide |
| D. | Enzyme |
| Answer» C. Nucleotide | |
| 53. |
The illustration given below is which nitrogen base: |
| A. | Uracil |
| B. | Cytosine |
| C. | Thymine |
| D. | Ribose |
| Answer» C. Thymine | |
| 54. |
The illustration given below is which nitrogen base: |
| A. | Guanine |
| B. | Cytosine |
| C. | Uracil |
| D. | Adenine |
| Answer» D. Adenine | |
| 55. |
The following diagram represents the nitrogenous bases of nucleic acid Molecules Identify the correct combination: |
| A. | A= Guanine , B= Uracil |
| B. | A= Adenine , B= Thymine |
| C. | A= Cytosine , B= Adenine |
| D. | A= thymine , B= Guanine |
| Answer» A. A= Guanine , B= Uracil | |
| 56. |
What is Ribonucleoside? |
| A. | Ribose + Nucleic acid |
| B. | Ribose + Nitrogen base |
| C. | Ribose + Phosphate |
| D. | Ribose + Adenine |
| Answer» B. Ribose + Nitrogen base | |
| 57. |
What ‘A’ and ‘B’ indicates in the given diagram? |
| A. | A= CH2OH, B= OH |
| B. | A= CH2OH, B= H |
| C. | A= CH, B= OH |
| D. | CH2, B= H |
| Answer» D. CH2, B= H | |
| 58. |
Which two sequential carbon number of nucleotides join through phosphodiaster bond? |
| A. | 3 and 5 |
| B. | 1 and 4 |
| C. | 1 and 6 |
| D. | 2 and 5 |
| Answer» A. 3 and 5 | |
| 59. |
What is Guanine? |
| A. | Purine |
| B. | Hormone |
| C. | Enzyme |
| D. | Pyrimidine |
| Answer» A. Purine | |
| 60. |
Ribonucleoside formed from ribonucleotide while:- |
| A. | It made from sugar |
| B. | It made from nitrogen base |
| C. | It made from phosphate |
| D. | a, b, c all above |
| Answer» C. It made from phosphate | |
| 61. |
DNA is localized in which cell organelle? |
| A. | Vacuoles |
| B. | Lysosomes |
| C. | Golgi apparatus |
| D. | Nucleus, mitochondria, chloroplast |
| Answer» D. Nucleus, mitochondria, chloroplast | |
| 62. |
A DNA stand is directly involved in the synthesis of all the following except – |
| A. | Another DNA Stand |
| B. | t- RNA |
| C. | m-RNA |
| D. | Protein |
| Answer» D. Protein | |
| 63. |
Nucleic acids were discovered by whom? |
| A. | Crick |
| B. | Wilkinson |
| C. | meischer |
| D. | Watson |
| Answer» C. meischer | |
| 64. |
Nucleic acids are related with which activity? |
| A. | Digestion |
| B. | Respiration |
| C. | Reproduction |
| D. | Heredity |
| Answer» D. Heredity | |
| 65. |
What ‘A’ and ‘B’ indicates in the given structure? |
| A. | A= CH2, B= N |
| B. | A= (>C=0), B= NH |
| C. | A= NH, B= NH |
| D. | A=NH2, B=NH |
| Answer» D. A=NH2, B=NH | |
| 66. |
Chemically DNA differs from RNA by: |
| A. | Thymine and deoxyribose present in DNA and Uracil and ribose in RNA |
| B. | Uracil and deoxyribose in DNA and thymine and ribose in RNA |
| C. | Deoxyribose in DNA and ribose in RNA |
| D. | Two nucleotide in DNA and one nucleotide in RNA |
| Answer» A. Thymine and deoxyribose present in DNA and Uracil and ribose in RNA | |
| 67. |
Nucleic acids are polymers of which molecules? |
| A. | Nucleosides |
| B. | Nucleotides |
| C. | Polypeptides |
| D. | polysomes |
| Answer» B. Nucleotides | |
| 68. |
A molecule of ATP is structurally most similar to a molecule of? |
| A. | RNA |
| B. | Protein |
| C. | Lipid |
| D. | Amino acid |
| Answer» A. RNA | |
| 69. |
Which is the site of protein synthesis? |
| A. | Chromosomes |
| B. | DNA |
| C. | Polysomes |
| D. | Tonoplast |
| Answer» C. Polysomes | |
| 70. |
Select the specific base pairs of DNA: |
| A. | Adenine and Cytosine |
| B. | Guanine and Adenine |
| C. | Adenine and Thymine |
| D. | Guanine and Uracil |
| Answer» C. Adenine and Thymine | |
| 71. |
The DNA stands are antiparallel because of: |
| A. | Ester bond |
| B. | Phosphodiester bond |
| C. | Disulphide bond |
| D. | Hydrogen bond |
| Answer» B. Phosphodiester bond | |
| 72. |
The distance between two chains of DNA molecules is: |
| A. | 34 A° |
| B. | 20 A° |
| C. | 3.4 A° |
| D. | 10 A° |
| Answer» B. 20 A° | |
| 73. |
The length of one complete spiral of DNA is: |
| A. | 34 A° |
| B. | 3.4 A° |
| C. | 20 A° |
| D. | 340 A° |
| Answer» A. 34 A° | |
| 74. |
Which one of the following bases is found only in RNA and not in DNA? |
| A. | Guanine |
| B. | Adenine |
| C. | Uracil |
| D. | Thymine |
| Answer» C. Uracil | |
| 75. |
The scientists who discovered the structure of DNA molecule |
| A. | Miller and mandal |
| B. | Khorana and Nirenberg |
| C. | Calvin and Wilkinson |
| D. | Waston and Crick |
| Answer» D. Waston and Crick | |
| 76. |
Mention the example of dinuclotide in the given structure. |
| A. | RNA with UA |
| B. | RNA with CG |
| C. | DNA with TA |
| D. | DNA with CG |
| Answer» A. RNA with UA | |
| 77. |
The structure of DNA like a spiral ladder because |
| A. | Purine and Pyrimidine are on the opposite side |
| B. | Purine and Pyrimidine linked with hydrogen bond |
| C. | All nucleotides join through a phosphodiester bond |
| D. | Two polynucleotide chains arranged parallel to each other and are spirally Twisted |
| Answer» D. Two polynucleotide chains arranged parallel to each other and are spirally Twisted | |
| 78. |
The hydrogen bonds between adenine and guanine are |
| A. | 2 |
| B. | 3 |
| C. | 1 |
| D. | 0 |
| Answer» D. 0 | |
| 79. |
Which of the following is correct? |
| A. | A=T |
| B. | C=G |
| C. | G=A |
| D. | A=C |
| Answer» A. A=T | |
| 80. |
Nitrogen bases do not contain |
| A. | Phosphorus |
| B. | Nitrogen |
| C. | Hydrogen |
| D. | Carbon |
| Answer» A. Phosphorus | |
| 81. |
Which one is two ringed nitrogenous base? |
| A. | Thymine |
| B. | Adenine |
| C. | Cytosine |
| D. | Uracil |
| Answer» B. Adenine | |
| 82. |
Which of the following ratio is constant in the DNA of all the species? |
| A. | A+U / T+C |
| B. | A+G/ C+T |
| C. | A+C / T+G |
| D. | A+T / C+G |
| Answer» D. A+T / C+G | |
| 83. |
m-RNA is the polymer of |
| A. | Ribonucleotide |
| B. | Ribonucleoside |
| C. | Deoxyribonucleotide |
| D. | Ribosome |
| Answer» A. Ribonucleotide | |
| 84. |
Which of the following is incorrect? |
| A. | m-RNA is degreased after its function is over |
| B. | t-RNA are synthesized by m-RNA |
| C. | r-RNA is localized in the ribosome |
| D. | m-RNA carries genetic code in to cytoplasm |
| Answer» B. t-RNA are synthesized by m-RNA | |
| 85. |
Which is longest of all RNA? |
| A. | m-RNA |
| B. | t-RNA |
| C. | r-RNA |
| D. | None above |
| Answer» A. m-RNA | |
| 86. |
The common instant source of energy of cellular activities is |
| A. | Mitochondria |
| B. | DNA |
| C. | RNA |
| D. | ATP |
| Answer» D. ATP | |
| 87. |
Which one is known as adapter molecule? |
| A. | DNA |
| B. | m-RNA |
| C. | t-RNA |
| D. | r-RNA |
| Answer» C. t-RNA | |
| 88. |
The RNA transporting amino acid to the protein synthesizing site known as |
| A. | t-RNA |
| B. | r-RNA |
| C. | m-RNA |
| D. | Any one of a, b, c |
| Answer» A. t-RNA | |
| 89. |
Match the column and find out the correct combination
|
| A. | P-v, Q-iii, R-ii, S-i, T-iv |
| B. | P-v, Q-iii, R-iv, S-I, T-ii |
| C. | P-iii, Q-v, R-i, S- ii, T-iv |
| D. | P-v, Q-i, R-ii, S-iii, T-iv |
| Answer» A. P-v, Q-iii, R-ii, S-i, T-iv | |
| 90. |
Which is the special function of t-RNA? |
| A. | Pick up code for m-RNA and bring it to r-RNA |
| B. | Do protein synthesis |
| C. | Carries the coded genetic information in to the cytoplasm |
| D. | An adapter for attaching amino acid to m-RNA template during Protein synthesis |
| Answer» D. An adapter for attaching amino acid to m-RNA template during Protein synthesis | |
| 91. |
Which are proportionally more compounds in all RNA’s? |
| A. | m-RNA |
| B. | t-RNA |
| C. | r-RNA |
| D. | a, b, c all |
| Answer» C. r-RNA | |
| 92. |
Which is the part of DNA molecules that varies among DNA molecule |
| A. | Pentose sugar |
| B. | nitrogen base |
| C. | phosphate |
| D. | a & b both |
| Answer» B. nitrogen base | |
| 93. |
which kind of arrangement lies in the two polynucleotide chain of DNA? |
| A. | Antiparallel and complementary |
| B. | parallel and complementary |
| C. | Independent |
| D. | None above |
| Answer» A. Antiparallel and complementary | |
| 94. |
If the one base chain sequence of DNA is ACGTTGG then what will be the base Sequence of opposite chain |
| A. | TGCAACC |
| B. | GTAGGAA |
| C. | CATGGTT |
| D. | TAGCCGG |
| Answer» A. TGCAACC | |
| 95. |
What is ATP? |
| A. | Pentose sugar + adenine + 3 molecule phosphate |
| B. | Hexose sugar + adenine + 3 molecule phosphate |
| C. | Amino acid + adenine + 3 molecule phosphate |
| D. | a or b both |
| Answer» A. Pentose sugar + adenine + 3 molecule phosphate | |
| 96. |
What is enzyme? |
| A. | All proteins which are in all living cell |
| B. | Chemicals which act as biological catalysts |
| C. | All amino acid which are in polypeptide chain |
| D. | All above |
| Answer» B. Chemicals which act as biological catalysts | |
| 97. |
Which of the following is not true for enzyme |
| A. | Water soluble and colloidal in nature |
| B. | Lowers the activation energy level |
| C. | Used up in the biochemical reaction |
| D. | Affected by the change in temperature |
| Answer» C. Used up in the biochemical reaction | |
| 98. |
What is Ribozymes? |
| A. | Only nucleic acids |
| B. | ony protein |
| C. | Some nucleic acids that behave like enzyme |
| D. | M ore than one Ribosome |
| Answer» C. Some nucleic acids that behave like enzyme | |
| 99. |
Enzymes are present in which parts of plant? |
| A. | Only in leaves |
| B. | Only in fruits |
| C. | In apical meristem of root and shoot |
| D. | in all the living cell of plant body |
| Answer» D. in all the living cell of plant body | |
| 100. |
What is an apoenzyme? |
| A. | Protein |
| B. | Amino acid |
| C. | metallic ions |
| D. | Carbohydrates |
| Answer» A. Protein | |
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