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Genetics Most Important MCQs: Set#. 1

1 - The gene for Huntington disease is located on________chromosome






4

2 - _______ enzymes are used to cut the DNA Of invading viruses






Restriction

3 - _________ grooves are produced during DNA double helix






2

4 - _________ is a condition in which viral reproduction and lysis does not occur






Lysogeny

5 - _________ is a technique essential to separate different-sized fragments of DNA and RNA chains






Electrophoresis

6 - _________ is one of a number of agents capable of inducing mutation in the genetic material






UV light

7 - _________ region on X chromosome is also responsible for pairing of homologous chromosome






Xic

8 - _____________ is the source of new allele






Mutation

9 - ______________interference is more common in eukaryotic individuals






Possitive

10 - _____________a modified version of amino acid is found in several methane loving bacteria






Pyrrolysine

11 - _____________dilution is done to count the number of colony






Serial

12 - _____________is/are important in cell bioenergetics






Both a and b

13 - _____________lethal allele are rarely observed






Dominant

14 - _____________mutation results in increasing the quantity of the gene product






Gain of function

15 - ____________amino acid/acids is/ are encoded by six different codons






All of these

16 - ____________are like "beads on astring"






Genes

17 - ____________gene tranfer is applied between the member of different species






Horizontal

18 - ____________gene tranfer is applied between the member of same species






Vertical

19 - ____________region on chromosome Which inhibit the expression of adjacent genes






Heterochromatin

20 - ___________cross over between the chromatids helps in sequencing of genes






Multiple

21 - ___________in males occur less frequently than female






Crossing over

22 - ___________is important integrity of the lens of eyes, the lining of vessels of aorta and to bones






Fibrillin

23 - ___________is the unit of transmission during meiosis






Chromosome

24 - ___________responsible for Barr body formation






Xic

25 - ___________was the first to discover the phenomenon of x-linkage






Morgan

26 - __________are short repetitive sequences that are found hroughout the genome






Microsatellites

27 - __________assumes that there is no real diffeence between the measured and the predicted values






Null hypothesis

28 - __________body temperature causes dark fur production in Himalayan rabbits






Low

29 - __________body temperature causes light color fur production in Himalayan rabbits






High

30 - __________crystalized the tRNA in 1974






Alexander Rich

31 - __________increases the chances of genetic variation






Meiosis

32 - __________is the best characterized human SINEs






Alu family

33 - __________make chromosome resistant to nuclease digestion






Shelterin complex

34 - __________plants are propagated asexually






Triploids

35 - __________pointed out that there must be many more"unit gactors" than chromosomes in most organisms






Sutton

36 - __________proteins play an important role in packaging DNA into the nucleosome






Histone

37 - __________serve as primer to start DNA synthesis






RNA

38 - _________Contain haploid number of dyads






Secondary spermatocyte

39 - _________findings have extended our knowledge of transcription and he was awarded the Nobel prize in Chemistry in 2006






Kornberg's

40 - _________is a large hexameric protein with RNA helicase activity






Rho

41 - _________was used by Beadle and Tatum to prove the concept of one gene one enzyme hypothesis






Neurospora

42 - _________work revealed that HbS and HbA differed by only a single peptide fragment






Ingram's

43 - ________is an invaluable program for searching through GenBank and other databases to find DNA and protein sequence similarities between cloned substances






BLAST

44 - ________is found in every part of cell






Protein

45 - ________is the real player of translocation during translation






rRNA

46 - ________is used to identify complementary sequences






Probe

47 - ________Shows/show no sexual distinction in feathering phenotypes






Both a and b

48 - _______rich of OriC of bacteria are relatively less stable than double helical sequence of DNA






AT

49 - 14/21, the balanced translocation carrier will be Phenotypically________






Both a and b

50 - 14/21, the balanced translocation carrier will produce____________progeny when cross with standard haploid gamete






All of these

51 - 15 percent of MSY drived from






X

52 - 23S and 5S of rRNA are found in large subunits of____________






Bacteria

53 - 28S and 5S of rRNA are found in large subunits of____________






Eukaryotes

54 - 2n+2 is example of






Tetrasomy

55 - 2n+3 is example of






Pentasomy

56 - 3n is also known as






Both a and b

57 - 46,XY female are due to






Swyer syndrome

58 - 47, XXX female are physically






Normal

59 - 47, XXX female birth ratio is 1 of every births






1000

60 - 47,XYY syndrome in male was discovered by






Patricia Jacobs

61 - 47,XYY syndrome may shows __________behavior






All of these

62 - 48, XXXY, 48, XXYY, 49, XXXXY and 49, XXXYY are similar phenotypically to






Klinefelter syndrome

63 - 7-methylguanosine cap in mRNA is found in






All of these

64 - A bacterium which can not synthesize one or more organic compounds due to mutation is called






Auxotroph

65 - A classical example of amphiploidy is cultivated species of






Cotton

66 - A clear area produced by viruses in bacterial culture media is called






Plaque

67 - A complex of six proteins binds and stabilizes telomere t-loop forming the ____________






Shelterin complex

68 - A condition in which an enzyme essential to a biosynthetic pathway becomes inactive in microoganisms






Auxotroph

69 - A condition in which certain cells in an diploid organism are polyploid






Endopolyploidy

70 - A condition in which more than two alleles are present in single gene is called






Multiple allele

71 - A detailed model of nucleosome was put forward in 1984 by






J.T. Finch

72 - A diploid individual has ____________allele/alleles in one gene






2

73 - A large percentage of fetuses demonstrating chromosomal abnormalities are






Aneupoids

74 - A medium containing only lactose and inorganic ions






Minimal

75 - A medium that contain all essential nutritions for survival of bacteria is called






Complete

76 - A nucleotide consists of






All of these

77 - A recent and accurate measurement of number of base pairs per turn is _________rather than 10 predicted by Watson and Crick






10.4

78 - A single bacterial cell contains about_________ribosomes






10000

79 - A single E.coli cell contains about________molecules of DNA polymeraseIII.






15

80 - AAAABBBB is type of






Allopolploidy

81 - ABC/abc are two non sister chromatids, what will be the product of duoble crossover during gametes formation






AbC/aBc

82 - ABC/abc are two non sister chromatids, what will be the product of non crossover during gametes formation






ABc/abC

83 - ABC/abc are two non sister chromatids, what will be the product of single crossover during gametes formation






Both a and b

84 - Abnormal aggregation of protein occur in






All of these

85 - Abortion of abnormal fetal is difficult decision due to___________issue/issues






Both a and b

86 - About _________Micronucleoli are found in a single oocyte of Xenopus






1500

87 - About _______percent of human X chromosome (Barr body) genes do not inactivate






15

88 - About 20 percent of transcripts in E. coli are terminated by __________ termination






Rho-dependent

89 - About 80 percent of transcripts in E. coli are terminated by __________ termination






Intrinsic

90 - Above average height (over 6 feet) is found in






47, XYY

91 - According to postulate by Wollman and Jacob E. coli chromosome is ____________, with no free ends






Circular

92 - According to ABO blood group system, there are _______types of blood group






4

93 - According to Bridges, What will be the sex of fruit fly having chromosome formulation 2X:2A






Female

94 - According to Bridges, What will be the sex of fruit fly having chromosome formulation 2X:3A






Intersex

95 - According to Bridges, What will be the sex of fruit fly having chromosome formulation 3X:2A






Metafemale

96 - According to Bridges, What will be the sex of fruit fly having chromosome formulation 3X:3A






Female

97 - According to Bridges, What will be the sex of fruit fly having chromosome formulation 3X:4A






Intersex

98 - According to Bridges, What will be the sex of fruit fly having chromosome formulation X:2A






Male

99 - According to Bridges, What will be the sex of fruit fly having chromosome formulation XY:2A






Male

100 - According to Bridges, What will be the sex of fruit fly having chromosome formulation XY:3A






Metamale

101 - According to Chargaff, molar proportions of Adenine in DNA was almost equal to






Thymine

102 - According to Chargaff, molar proportions of Cytosine in DNA was almost equal to






Guanine

103 - According to Chargaff, molar proportions of Guanine in DNA was almost equal to






Cytosine

104 - According to Chargaff, molar proportions of Thymine in DNA was almost equal to






Adenie

105 - According to Griffith the virulent bacteria have capsule made up of






Ploysaccharide

106 - According to MN blood group system, there are _______types of blood group






3

107 - According to process of removal of introns, there are_______group/groups of introns






2

108 - According to sex linkage, male in human is






Hemizygous

109 - According to Watson and Crick model of DNA, the hydrogen bond forms between Adenine and ________






Thymine

110 - According to Watson and Crick model of DNA, the hydrogen bond forms between Cytosine and ________






Guanine

111 - According to Watson and Crick model of DNA, the hydrogen bond forms between Guanine and ________






Cytosine

112 - According to Watson and Crick model of DNA, the hydrogen bond forms between Thymine and ________






Adenine

113 - According to Watson and Crick, the bases are ________angstrom (A) apart from on another






3.4

114 - According to Wilson, the female milkweed bug is






Homogametic

115 - According to Wilson, the male milkweed bug is






Hetreogametic

116 - According to wobble hypothesis anticodon-codon base pairing, A at first position of tRNA will pair with base at 3rd position of mRNA






U

117 - According to wobble hypothesis anticodon-codon base pairing, C at first position of tRNA will pair with base at 3rd position of mRNA






G

118 - According to wobble hypothesis anticodon-codon base pairing, G at first position of tRNA will pair with base at 3rd position of mRNA






Both a and b

119 - According to wobble hypothesis anticodon-codon base pairing, I at first position of tRNA will pair with base at 3rd position of mRNA






All of these

120 - According to wobble hypothesis anticodon-codon base pairing, U at first position of tRNA will pair with base at 3rd position of mRNA






Both a and b

121 - According to wobble hypothesis first ___________ribonucleotide/ribonucleotides is/ are more critical in genetic code






2

122 - Acetylation, Methylation, Phosphorylation of histones are___________






Reversible

123 - Act/acts as prosthetic group






All of these

124 - Addition or deletion of one or more chromosomes but not a complete set is called






Aneuploidy

125 - Addition or deletion of one or more complete set of chromosomes is called






Euploidy

126 - Adenine forms_______hydrogen bond with Thymine






2

127 - After conjugation F- bacteria become






F+

128 - After crossing over , _________ chromatids of paternal and maternal are produced






Mosaic

129 - AG dinucleotide sequence of snRNAs also called as






Splice acceptor

130 - AGA, normally specify Arginine but in mitochondria it specify_________






Termination

131 - AGG, normally specify Arginine but in mitochondria it specify_________






Termination

132 - Alkaptonuria was studied by






Garrod

133 - All 46 chromosomes in a single cell of human may extend upto_______meters






2

134 - All are nonpolar and hydrophobic except_______amino acid is polar and hydrophilic






serine

135 - All are polar and hydrophilic except_______amino acid is nonpolar and hydrophobic






Tryptophan

136 - All are polar and positively charged except_______amino acid is polar and negatively charged






Aspatic acid

137 - Allopolyploids are rare in ____________






Animals

138 - Allopolyploids are rare in animals because their___________behavior is specific






Mating

139 - Alternate forms of DNA may exist due to






All of these

140 - Amniocenesis and chorionic villus sampling is done to know






All of these

141 - An alternate of a gene






Allele

142 - An amorphous component where rRNA is synthesized is called






Nucleolus

143 - An incorrect amino acid will occur only once in every________polypeptides of an average length of 500 amino acids.






20

144 - Aneuploidy is better tolerated in the________kingdom






Plant

145 - ApolipoproteinB is example of_________editing of mRNA in mammals






Substitution

146 - Areas remain in contact where non sister chromatids are interwind






Chiasmata

147 - Aromatase convert androgen to_________in female






Estrogen

148 - Aromatase convert androgen to_________in male






Testosterone

149 - Around 1900,German chemist_______determined the manner in which the amino acids are bonded together






Emil Fischer

150 - Artificial selection started about________of years ago






Thousands

151 - As the homologs condens and shorten, each bivalent give rise to a unit called






Tetrad

152 - Assembled functional ribosome is also called






Monosome

153 - At any given time during transcription, about _______base pairs of DNA and _________residues of the growing RNA chain are part of the enzyme-substrate complex






40-18

154 - At the completion of telophase , the cell enters____________






Interphase

155 - At the end of telomeres, a strech of single stranded DNA extends out from the 3-________rich strand






G

156 - AUA, normally specify isoleucine in cytoplasm but in mitochondria it specify_________






Methionine

157 - Autopolyploids are larger than their________relatives






Diploids

158 - Bacteria are diluted in






Culture media

159 - Bacteria that can grow on minimal media are called






Prototroph

160 - Bacterial chromosome contains________replication origin/origins






1

161 - bacterial culture media is also known as






Lawn

162 - Bacterial DNA and chloroplast DNA share the following character/s






All of these

163 - Barr body arises from one of the two __________chromosome






X

164 - Based on woble rules, only about________different tRNA species are necessary to accommodate the 61 codons






30

165 - Before the fifth week of gestation, the humam embryo is_____________






Hermaphrodite

166 - Bipotential gonads can give rise






Both a and b

167 - Both 9mers and 13mers of OriC of bacteria are ________rich






AT

168 - Both coding and noncoding region contain






Both a and b

169 - By the twenty fifth week of gestaion, all oocytes become arrested in meiosis and remain dormant untill






Puberty

170 - By the mid-__________the concept that DNA is the genetic material in eukaryotes was accepted






1970s

171 - Cancer cells avoids_________phase of cell division






G0

172 - Cardiomyopathy is a disorder of heart muscles resulted from






Mitochondrial difunction

173 - Carl Correns discovered a variant of_________plant






Mirabilis jalapa

174 - Cell size ___________ in Autopolyploids






Increases

175 - Cell theory was presented by






Schliden and Schwann

176 - Centrioles are absent in________cells






Plants

177 - Centrioles are present in






Animals

178 - Centrioles are present in________cells






Animals

179 - Centrioles divide and move apart during






Prophase

180 - Characteristic/s of chloroplast DNA






All of these

181 - Characteristic/s of mitochondrial DNA






All of these

182 - Chemically chaperones are __________in nature which help in folding of proteins






Proteins

183 - Chromatin strands resemble beads on a string was observed by






Ada

184 - Chromosomal theory of inheretance was prposed by






Sutton

185 - Chromosomes are extended and uncoiled forming chromatin






Interphase

186 - Chromosomes are invisible in______________






Interphase

187 - Chromosomes brakage can occur due to






All of these

188 - Chromosomes which are same in diploid organisms are called






Homologous

189 - Circular, double stranded and free of associated proteins DNA is found in






All of these

190 - Closed loop translation is characteristic of






All of these

191 - Clover leaf model of tRNA was proposed by






Robert Holley

192 - Cojugation can not occurs between






HFR and F+

193 - Colchicine is used to create______________during mitosis in somatic cells






Polyploidy

194 - Colchicine is used to double the amount of__________






Chromosomes

195 - Cold and heat shock are applied during meiosis to create






Polyploidy

196 - Colorblindness deutan type in human is ________trait






X-linked

197 - Commercial bananas and seedless watermelons are






Triploids

198 - Commonly used dilution method






10-fold

199 - Complete picture of the MSY region of Y chromosome was orovided by






David page

200 - Contractile protein






Actin

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