Class XI Biology MCQs

Biological Molecules Class 11 Notes, MCQs, Short Questions

1. Find the combination containing major, minor, and trace elements each respectively for human.
2. Which element is found greatest by mass in human body?
3. Which set of elements is universal in carbohydrates, lipids, proteins and nucleic acids?
4. What is correct number for natural elements, elements found in life and elements present in human beings?
5. Which of the following element is necessary for the chemiosmosis to develop ATPs during photosynthesis and respiration?
6. Which of the following elements is not a major element for humans?
7. What is major element?
8. What is the correct number of bio-elements?
9. Which of the following is not a major element for human body?
10. The branch of biology which deals with the study of chemical processes in the body is called:
11. The chemical compounds of living organisms are called:
12. The pH of water is:
13. The basic element of organic molecules is:
14. The compounds formed by the release of water molecules, the process is called:
15. The process in which polymers are broken down into simpler molecules is called:
16. Carbon is an element:
17. The bond which is formed by the loss or gain of electrons is called:
18. The bond which is formed by the mutual sharing of electrons is called:
19. Groups which replace the hydrogen atom of a compound are called:
20. The bond formed between an acid and alcohol by condensation is called:
21. The bond formed between an acid and amine group is called:
22. Proteins are composed of:
23. The name protein was suggested by:
24. Amino acids are linked together by a bond called:
25. A polypeptide chain having a straight arrangement of amino acids is called:
26. A polypeptide chain having spirally coiled arrangement of amino acids is called:
27. A polypeptide chain having three-dimensional folded structure is called:
28. When two or more polypeptide chains are linked together into a large-sized molecule, it is called:
29. Hemoglobin is a type of protein:
30. Carbohydrates which cannot be further changed into simpler forms are called:
31. Carbohydrates which are composed of two to ten sugar molecules are called:
32. In skin, hairs, nails, and muscles, the compounds present are:
33. Sucrose, maltose, and lactose are examples of:
34. Starch, glycogen, and cellulose are examples of:
35. Glucose and fructose are:
36. Milk sugar is known as:
37. The sweetest sugar is called:
38. Galactose, glucose, and fructose are:
39. Ribose is a:
40. The animal starch is known as:
41. Cellulose is present in:
42. Uracil is present in:
43. The term lipid was proposed by:
44. Fats, oils, waxes, and terpenoids are:
45. The group of lipids based only on isoprenoid unit is called:
46. Lipids that produce special fragrance and may be used in perfumes are called:
47. Lipids which consist of four rings, attached together with 17 carbon atoms are called:
48. Cholesterol and sex hormones are included in:
49. Fats and oils are included in:
50. Solid fats are included in:
51. Oils are included in:
52. The animal fat is called:
53. The group of pigmented compounds producing different colors is called:
54. Nucleic acid was isolated from the nuclei of pus cells for the first time by:
55. The basic unit of nucleic acid is:
56. ATP, the energy-rich compound is considered as:
57. The hereditary material is considered as:
58. The carrier of information is known as:
59. The basic unit of life is:
60. The most abundant molecule in living cells is:
61. Which element is present in all organic compounds?
62. The process of joining molecules with removal of water is called:
63. The breakdown of molecules using water is called:
64. Carbohydrates are mainly composed of:
65. The simplest carbohydrate is:
66. Glucose is a:
67. The storage carbohydrate in plants is:
68. The structure of protein determined by amino acid sequence is:
69. Enzymes are mostly:
70. Enzymes function as:
71. The substrate binds to enzyme at:
72. Lipids are mainly composed of:
73. The building blocks of fats are:
74. Fats are stored mainly in:
75. Steroids contain:
76. Cholesterol is a type of:
77. Nucleic acids are made up of:
78. DNA stands for:
79. RNA stands for:
80. DNA contains which sugar?
81. RNA contains which sugar?
82. The nitrogenous base present in DNA but not in RNA is:
83. The base present in RNA but not in DNA is:
84. DNA has a structure known as:
85. The pairing of adenine in DNA is with:
86. Guanine pairs with:
87. The energy currency of the cell is:
88. ATP stands for:
89. ATP releases energy when converted to:
90. The molecule responsible for carrying genetic information is:
91. Vitamins are classified as:
92. Vitamin C is also called:
93. Vitamin D helps in absorption of:
94. Hemoglobin contains which metal ion:
95. The main function of enzymes is to:
96. The molecule that carries amino acids to ribosomes is:
97. Ribosomes are mainly composed of:
98. mRNA carries genetic information from:
99. The waxy protective coating on plant leaves is:
100. Waxes mainly function as: