BIOLGOY MCQ CHAPTER 1+2
51. If three molecules of a fatty acid, each having the formula C16H22COOH, were joined to a molecule of glycerol (C3H8O3), the resulting molecule would have the formula
(A) C48H68O6
(B) C48H74O6
(C) C54H71O6
(D) C54H68O9
Right Answer (C)
52.: Monosaccharides contain carbon atoms
(A) 3-7
(B) 3-6
(C) 3-9
(D) 3-10
Right Answer (A)
53: Stearin is
(A) Fatty acid
(B) Saturated acylglycerol
(C) Unsaturated acylglycerol
(D) None of these
Right Answer (A)
54. Energy absorbed to change water from liquid to gas is called
(A) Latent heat of fusion
(B) High surface tension
(C) Heat of vaporization
(D) High heat capacity
Right Answer (C)
55.: The sources of carbohydrates are green plants. These are primary product of
(A) Respiration
(B) Catabolism
(C) Photosynthesis
(D) All A, B and C
Right Answer (C)
56. It is most abundant carbohydrate in the nature
(A) Glycogen
(B) Chitin
(C) Lignin
(D) Cellulose
Right Answer (D)
57.: It is the most abundant organic component in living cells.
(A) Lipid
(B) Carbohydrate
(C) Water
(D) Protein
Right Answer (B)
58. Each of the 20 naturally occurring amino acids has a different
(A) NH2 group
(B) –COOH group
(C) R group
(D) –OH group
Right Answer (C)
59.: The sum of all the chemical reaction that occurs in the body is known as
(A) Anabolism
(B) Metabolism
(C) Catabolism
(D) Differentiation
Right Answer (B)
60.: Which is an organic molecule
(A) H2O
(B) H2SO4
(C) NO2
(D) C6H12O6
Right Answer (D)
61. Which class of molecule is the major component of cell membrane
(A) Phospholipid
(B) Cellulose
(C) Wax
(D) Triglyceride
Right Answer (A)
62.: Peptide bonds are found in
(A) Protein
(B) Carbohydrate
(C) Lipids
(D) Inorganic compounds
Right Answer (A)
63: Glycerol is the back bone molecule for
(A) Disaccharides
(B) DNA
(C) Triglycerides
(D) ATP
Right Answer (C)
64. When a protein undergoes a hydrolysis reaction the end-products are
(A) Amino acids
(B) Monosaccharides
(C) Fatty acids
(D) Nucleotide
Right Answer (A)
65: The functional group –COOH is
(A) Acidic
(B) Basic
(C) Never ionized
(D) All options are correct
Right Answer (A)
66: Which of these is an example of hydrolysis
(A) Amino acid + amino acid – Dipeptide + H2O
(B) Dipeptide + H2O—amino acid + amino acid
(C) Both A and B
(D) Neither of these is correct
Right Answer (B)
67.A fatty acid is unsaturated if it
(A) Contains hydrogen
(B) Contains double bonds
(C) Contains an acidic group
(D) Bonds to glycogen
Right Answer (B)
68.: A hormone is an example of which functional class of proteins.
(A) Contractile
(B) Structural
(C) Regulatory
(D) Cyclic
Right Answer (C)
69.: The Sugar found in RNA is
(A) Fructose
(B) Galactose
(C) Deoxyribose
(D) Ribose
Right Answer (D)
70.: Steroid are classified as
(A) Carbohydrates
(B) Lipids
(C) Proteins
(D) Nucleic acids
Right Answer (B)
71. Hemoglobin is an example of which functional class of protein
(A) Contractile
(B) Structural
(C) Regulatory
(D) Transportive
Right Answer (D)
72. In RNA the Nitrogen base that takes the place of thymine is
(A) Adenine
(B) Cytosine
(C) Uracil
(D) Guanine
Right Answer (C)
73. The Suffix that denotes a sugar is
(A) ase
(B) ose
(C) ide
(D) amide
Right Answer (B)
74: It is an animal storage product that accumulates in the vertebrate liver and muscles.
(A) Cellulose
(B) Chitin
(C) Glycogen
(D) Fructose
Right Answer (C)
75. Asymmetrical lipid molecules with a hydrophilic head and a hydrophobic tail, with a phosphate group in place of one of the three fatty acid chains.
(A) Wax
(B) Terpenoid
(C) Steroid
(D) Phospholipid
Right Answer (D)
76. acylglycerol that are solid at room temperature.
(A) Fats
(B) Oils
(C) Linoleic acid
(D) None of these
Right Answer (A)
77.: Triglycerides that are liquid at room temperature.
(A) Fats
(B) Oils
(C) Stearin
(D) All of these
Right Answer (B)
78.: Nucleic acids are polymers composed of monomer units known as
(A) Amino acids
(B) Nucleosides
(C) Nucleotides
(D) Nitrogenous bases
Right Answer (C)
79. There are __________ nitrogenous bases.
(A) Four
(B) Five
(C) Six
(D) Three
Right Answer (B)
80.: The form of RNA that delivers information from DNA to be used in making a protein is ________________.
(A) messenger RNA
(B) ribosomal RNA
(C) transfer RNA
(D) None
Right Answer (A)
81.: RNA occurs in
(A) Nucleus
(B) Cytoplasm
(C) Both A and B
(D) Nucleoplasm
Right Answer (C)
82.: The monomer that makes up polysaccharides is
(A) Amino acids
(B) Glucose
(C) Fatty acids
(D) Glycerol
Right Answer (B)
83.Which of these is NOT a function of lipids?
(A) Long term energy storage
(B) Structures in cells
(C) Sex hormones
(D) Enzymes
Right Answer (D)
84.: All living things use the same ___ amino acids.
(A) 4
(B) 20
(C) 100
(D) 64
Right Answer (B)
85. Which of these is NOT a nucleotide base found in DNA?
(A) Uracil
(B) Adenine
(C) Guanine;
(D) Thymine
Right Answer (A)
86.: ATP consists of the ____________________, ribose sugar, , and phosphate group, PO4-2) plus two other phosphate groups.
(A) Cytosine base
(B) Guanine base
(C) Thymine base
(D) Adenine base
Right Answer (D)
87.: Membrane carbohydrates when linked to lipids are called
(A) Sphingolipids
(B) Glycolipids
(C) Phospholipids
(D) Sterols
Right Answer (D)
88.: Lactose is present in
(A) Sugar cane
(B) Fruits
(C) Milk
(D) Egg
Right Answer (C)
89.: A disaccharide that gives two molecules of glucose on hydrolysis is
(A) Sucrose
(B) Lactose
(C) Maltose
(D) None of these
Right Answer (D)
90.: In sugar cane and sugar beet, the storage product is
(A) Maltose
(B) Sucrose
(C) Lactose
(D) Isomaltose
Right Answer (B)
91.: One molecule of glucose and one molecule of galactose form
(A) Maltose
(B) Sucrose
(C) Lactose
(D) Isomaltose
Right Answer (C)
92: Nucleic acids are related with
(A) Respiration
(B) Photosynthesis
(C) Heredity
(D) None of these
Right Answer (C)
93: Waxes from protective coating on
(A) Leaves
(B) Fruits
(C) Animal’s skin
(D) All of these
Right Answer (D)
94.: The four nitrogenous bases which form the code words for DNA language are
(A) ACTU
(B) UTAC
(C) AGTU
(D) AGCT
Right Answer (D)
95. DNA and RNA differ in
(A) Sugar only
(B) Sugar and purines
(C) Sugar and pyrimindines
(D) Sugar & phosphate
Right Answer (C)
96.: A bond formed between carboxylic acid and alcohol is
(A) Ester bond
(B) Amide bond
(C) Phosphate bond
(D) Ionic bond
Right Answer (A)
97.The compounds made up of simple repeating isoprenoid units are called
(A) Neutral lipids
(B) Terpenoids
(C) Waxes
(D) All of these
Right Answer (B)
98.When amino acids in a polypeptide chain are arranged in spiral manner, it is called
(A) Primary structure
(B) Secondary structure
(C) Tertiary structure
(D) Quaternary structure
Right Answer (C)
99.: The step of protein synthesis in which the information contained specific segment of DNA is copied into RNA is called
(A) Transduction
(B) Translation
(C) Transformation
(D) Transcription
Right Answer (D)
100.: Choose the pair of terms that completes this sentence
Nucleotides are to __________as ____________ are proteins.
(A) Aminoacids______Polypeptides
(B) Genes _______ Enzymes
(C) Nucleic acids _____ Amino acids
(D) Polymers _____ Peptides
Right Answer (C)
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