1st Year Biology Chapter 2 Biological Molecules MCQs Short Questions Notes

biology 11th notes Chapter 2

1. The functional group COOH is:

 
 
 
 

2. The nature of Lipids is:

 
 
 
 

3. The term Protein was coined by:

 
 
 
 

4. It is the most abundant organic component in living cells:

 
 
 
 

5. Globular proteins are ellipsoidal or:

 
 
 
 

6. DNA model was suggested by:

 
 
 
 

7. Carbohydrates are also called:

 
 
 
 

8. Steroids are classified as:

 
 
 
 

9. Glyceraldehyde is one example of a group of sugers called:

 
 
 
 

10. elements that make up 98 percent of protoplasm are:

 
 
 
 

11. The form of RNA that delivers information from DNA to be used in making a protein is:

 
 
 
 

12. Animal starch is:

 
 
 
 

13. Ribose form a ring structure when in solution known as:

 
 
 
 

14. When amino acids in a polypeptide chain are arranged in spiral manner, it is called:

 
 
 
 

15. Oligosaccharides yield from two to ten monosaccharides on:

 
 
 
 

16. The melting points of palmitic acid is:

 
 
 
 

17. A ____ occurs as bonds are formed or broken between atoms, ions or molecules.

 
 
 
 

18. Lactose is present in:

 
 
 
 

19. The biological function of a protein is determined by its:

 
 
 
 

20. What is shown in the diagram below?

 
 
 
 

21. The four interconnected rings of steroid molecule have:

 
 
 
 

22. At room temperature animal Fats are:

 
 
 
 

23. Which of these is not a nucleotide base found in DNA?

 
 
 
 

24. The sugar found in RNA is:

 
 
 
 

25. Choose the pair of terms that completes this sentence: nucleotides are to as are to proteins.

 
 
 
 

26. A fatty acid is unsaturated if it:

 
 
 
 

27. Dehydration and hydrolysis reactions involve removing or adding to macromolecule subunits.

 
 
 
 

28. Which of these is not a function of lipids?

 
 
 
 

29. Double helix:

 
 
 
 

30. RNA synthesis by DNA is known as:

 
 
 
 

31. Cellulose is digested because of microorganism in their tract by:

 
 
 
 

32. Nicotinamide adenine dinucleotide abbreviated as:

 
 
 
 

33. Heamophilus influenzae is?

 
 
 
 

34. Nutral solution:

 
 
 
 

35. In RNA the Nitrogen base that takes the place of thymine is:

 
 
 
 

36. The amount of heat must be absorbed or lost by lg of that substance to change its temperature by 1°C:

 
 
 
 

37. The sources of carbohydrates are green plants. These are primary product of:

 
 
 
 

38. The sum of all the chemical reaction that occurs in the body is known as:

 
 
 
 

39. Codon:

 
 
 
 

40. All living things use the same amino acids.

 
 
 
 

41. Which of these terms includes all others in the list?

 
 
 
 

42. Molecular formula of Stearin fat is:

 
 
 
 

43. In aqueous medium fibrous proteins are:

 
 
 
 

44. A disaccharide that gives two molecules of glucose on hydrolysis is:

 
 
 
 

45. Enzymes are:

 
 
 
 

46. The process of making a polypeptide sequence from the genetic code of mRNA molecule associated with a ribosome is termed as:

 
 
 
 

47. Carboxyl group:

 
 
 
 

48. t RNA comprises about 10 to 20 percent of the:

 
 
 
 

49. A chemical group composed of a central phosphorous bonded to four oxygens:

 
 
 
 

50. Contain an anticodon:

 
 
 
 

51. Atoms form bonds by:

 
 
 
 

52. Oxygen carrying protein of red blood cells exhibits quaternary structure of protein.

 
 
 
 

53. The step of protein synthesis in which the information contained specific segment of DNA is copied into RNA is called:

 
 
 
 

54. Sucrose and Lactose are example of:

 
 
 
 

55. Number of peptide bonds in a dipeptide:

 
 
 
 

56. Energy absorbed to change water from liquid to gas is called:

 
 
 
 

57. All organic compounds contain the elements:

 
 
 
 

58. Monosaccharides usually contain carbon atoms:

 
 
 
 

59. The amount of DNA is fixed for a particular species as:

 
 
 
 

60. Fats and oils are lighter than:

 
 
 
 

61. The compound formed by combination of a base and a pentose sugar is called:

 
 
 
 

62. If three molecules of a fatty acid, each having the formula C16H₂2C00H, were joined to a molecule of glycerol (C311803), the resulting molecule would have the formula:

 
 
 
 

63. In sugar cane and sugar beet, the storage product is:

 
 
 
 

64. The Combining capacity of an atom or ion is called:

 
 
 
 

65. The sugar with aldehyde group is called:

 
 
 
 

66. Electrolytes that release hydrogen ions in water are called:

 
 
 
 

67. Polar molecules:

 
 
 
 

68. Watson and crick:

 
 
 
 

69. A chemical “buffer”:

 
 
 
 

70. DNA is?

 
 
 
 

71. These are composed of glycerol and fatty acids:

 
 
 
 

72. A fatty acid is a compound made of a chain of carbon atoms plus:

 
 
 
 

73. thirds of the weight of adults:

 
 
 
 

74. Nucleic acids are related with:

 
 
 
 

75. The four nitrogenous bases which form the code words for DNA language are:

 
 
 
 

76. Terpenoids are made up of simple repeating units called:

 
 
 
 

77. Large molecules with skeletons of carbon atoms are said to be:

 
 
 
 

78. NAD is an example of:

 
 
 
 

79. The cell energy currency:

 
 
 
 

80. It is estimated that a person of average size contains 16 kg of fat which is equivalent to:

 
 
 
 

81. The monomer that makes up polysaccharides is:

 
 
 
 

82. Nucleotide contains:

 
 
 
 

83. Asymmetrical lipid molecules with a hydrophilic head and a hydrophobi tail, with a phosphate group in place of one of the three fatty acid chains:

 
 
 
 

84. Glycogen is an example of:

 
 
 
 

85. Starch:

 
 
 
 

86. Two different molecule belonging to different categories, usually combine together to forms:

 
 
 
 

87. Triglycerides that are solid at room temperature:

 
 
 
 

88. There are nitrogenous bases.

 
 
 
 

89. A bond formed between carboxylic acid and alcohol is:

 
 
 
 

90. Metabolic activities included:

 
 
 
 

91. Which structure of protein comprises the number and sequence of amino acid in a protein molecule?

 
 
 
 

92. Hemoglobin is an example of which functional class of protein?

 
 
 
 

93. Cane suger is a/an:

 
 
 
 

94. Nucleoside + Phosphate:

 
 
 
 

95. The compounds made up of simple repeating isoprenoid units are called:

 
 
 
 

96. Nonpolar organic molecule:

 
 
 
 

97. Derivatives of phosphatidic acid are.

 
 
 
 

98. Which of these is an example of hydrolysis?

 
 
 
 

99. Basis element of organic compound is:

 
 
 
 

100. Conjugated Histon Proteins are:

 
 
 
 

101. Monosaccharide:

 
 
 
 

102. Solubility of fatty acids in organic solvents and their melting points increase with increasing number of:

 
 
 
 

103. Covalent bond:

 
 
 
 

104. Nitrogen bases such as choline, ethanolamine and serine are important of:

 
 
 
 

105. Stearin is:

 
 
 
 

106. Which one pick amino acid and transfer them to ribosome where they linked to form protein:

 
 
 
 

107. In animal fatty acids are:

 
 
 
 

108. Starches have branched chains and are insoluble in hot or cold water are:

 
 
 
 

109. To produce Lactose:

 
 
 
 

110. Peptide bonds are found in:

 
 
 
 

111. A hormone is an example of which functional class of proteins:

 
 
 
 

112. The function of ATP is to:

 
 
 
 

113. Triglycerides that are liquid at room temperature:

 
 
 
 

114. ATP:

 
 
 
 

115. The nucleohistane is present in:

 
 
 
 

116. Most abundant organic compound to be found in the cells is:

 
 
 
 

117. RNA occurs in:

 
 
 
 

118. Carbon is:

 
 
 
 

119. It is most abundant carbohydrate in the nature:

 
 
 
 

120. During the conversion of ATP into ADP, energy release is.

 
 
 
 

121. A bond that forms between a positively charged hydrogen atom of one molecule and a negative charged region of another molecule is an:

 
 
 
 

122. Starches have unbranched chains of glucose and soluble in hot water are:

 
 
 
 

123. DNA and RNA are made up of:

 
 
 
 

124. Glycerol is the back bone molecule for:

 
 
 
 

125. The covalent bond between two monosaccharides called:

 
 
 
 

126. Nucleotides have a nitrogenous base attached to a sugar at the:

 
 
 
 

127. Membrane carbohydrates when linked to lipids are called:

 
 
 
 

128. Adenine:

 
 
 
 

129. A nucleotide of DNA:

 
 
 
 

130. This aminoacid is called:
CH₃NH₂ —CH — COOH

 
 
 
 

131. Which is an organic molecule?

 
 
 
 

132. Protein attach to chromosome:

 
 
 
 

133. All of the following are organic compounds except:

 
 
 
 

134. Fibrin:

 
 
 
 

135. Nucleic acids are polymers composed of monomer units known as:

 
 
 
 

136. The Suffix that denotes a sugar is:

 
 
 
 

137. A triglyceride is a:

 
 
 
 

138. rRNA:

 
 
 
 

139. Waxes form protective coating on:

 
 
 
 

140. Which one is a protein?

 
 
 
 

141. Glucose and fructose are example of:

 
 
 
 

142. Which is not a lipid?

 
 
 
 

143. Branch of biology, which deals with the study of chemical components and chemical process in the living organism, is called:

 
 
 
 

144. Act as solvent for ionic compounds in body fluid:

 
 
 
 

145. Each of the 20 naturally occurring amino acids has a different:

 
 
 
 

146. Which of these is an example of hydrolysis?

 
 
 
 

147. It is an animal storage product that accumulates in the vertebrate liver and muscles:

 
 
 
 

148. Protein’s polymers are:

 
 
 
 

149. Which molecule is used for short term energy storage?

 
 
 
 

150. DNA and RNA differ in:

 
 
 
 

151. ATP releases energy when:

 
 
 
 

152. Translation:

 
 
 
 

153. One molecule of glucose and one molecule of galactose form:

 
 
 
 

154. Which of the following is considered to be neutral?

 
 
 
 

155. Which of the following represent accurate pairing in D.N.A. molecules?

 
 
 
 

156. ATP is an example of:

 
 
 
 

157. The carbohydrate molecule which yield 2 to 10 monosaccharide molecules on hydrolysis are:

 
 
 
 

158. Water molecule has characteristics of:

 
 
 
 

159. In tertiary structure of protein polypeptide chain bends and folds upon itself forming a shape:

 
 
 
 

160. If atoms of different elements combine, the molecule can also be called a:

 
 
 
 

161. Steriodes and triglycerides are example:

 
 
 
 

162. Each alpha chain of hemoglobin contains amino acid.

 
 
 
 

163. Which class of molecule is the major component of cell membrane?

 
 
 
 

164. A 5 carbon monosaccharide, a nitrogen base and a phosphoric acid are three sub units of:

 
 
 
 

165. Deoxyribose:

 
 
 
 

Short Questions

1. Define amino acid?
2. Define buffer?
3. Define heat of vaporization of water.
4. Define nucleotides?
5. Define oligosaccharides?
6. Define secondary proteins?
7. Define Specific heat capacity?
8. Define terpenoids?
9. Define triglycerides?
10. Differentiate between amylase and amylopectin starches?
11. Differentiate between Anabolic and catabolic reactions?
12. Differentiate between glycosidic and peptide bonds?
13. Difine biochemistry?
14. Give difference between saturated and un saturated fatty acids.
15. Hoe carbohydrates are chemically defined?
16. How many structures of protein are found?
17. How many types of starch are there?
18. How much solar energy s used in the synthesis of 10g glucose and in which form it is stored?
19. How water protects as an effective lubricant?
20. Name the carbohydrates suitable as food for man?
21. Name the four main types of biological molecules?
22. Nonpolar organic molecules such as fats are insoluble in water.What is the advantage of this fact?
23. Show peptide bond between two amino acids.
24. Sketch the structure of ribofuranose and glucopyranose.
25. sugars and keto sugars?
26. What are biochemicals?
27. What are biomolecules? Give two examples.
28. What are Covalent bonds?
29. What are monosaccharides found in nature?
30. What are most common monosaccharides?
31. What are physiologically important disaccharides?
32. What are some biologically important polysaccharides?
33. What are tetroses?
34. What are the major clases or groups of carbohydrates?
35. What are the most important organic compounds in living organisms?
36. What carbon occupies the central position in the skeleton of life?
37. What colour are given by starch glycogen and cellulose with iodine?
38. What did F.Sanger conclude about insulin?
39. What do you know about the solubility of carbohydrates?
40. What do you know about the taste of carbohydrates?
41. What does happen to monosaccharides when in solution?
42. What does happen to starch cellulose and glycogen on complete hydrolysis?
43. What is condensation?
44. What is dextrin?
45. What is glycosidic bond?
46. What is heat capacity of water? Give its importance.
47. What is heat of vaporization?
48. What is hydrolysis?
49. What is meant by organic molecules?
50. What is meant by saturated acyglycerol?
51. What is meduim of life?
52. What is metabolism?
53. What is normally the concentration of gluccse in our blood?
54. What is peptide bond?
55. What is primary structure of Protein?
56. What is Quaternary strcture of protein?
57. What is Secondary strycture of protein?
58. What is sucrose?
59. What is Tertiary structure of protein?
60. What is the advantage of heat of vaporization?
61. What is the basic element of organic compounds?
62. What is the concentration of each of H+ and OH ions in pure water at 25ᵒC?
63. What is the effect of hydrolysis on oligosaccharides?
64. What is the function of mRNA?
65. What is the general formula of carbohydrates?
66. What is the most important hexose from the biological point of view?
67. What is the percentage of water in brain cells of man?
68. What is the percentage of water in human tissues?
69. What trioses are intermediates in respiration and photosynthesis?
70. Where glucose is present in free state?
71. Where is glucose found in combined form?.Where is it naturally produced?
72. Where starch is found?
73. Which is the most abundant carbohydrate in nature.Where is it found in pure form?
74. Why glycogen is called animal starch?
75. Why the process of glucose synthesis by green plants is called photosynthesis?
76. Why these scientists are famous for:
77. Why water is an excellent solvent for polar substances?
78. Write the general formula of amino acid.

Long Questions

1. Describe biological properties and importance of water.
2. What are polysaccharides? Describe different types and give examples.
3. Give the classification of proteins.
4. Write the Watson and Crick model of DNA.
5. Give an account of acylglycerols.

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