1. The segregation ratio in F_2 generation for Mendel dihybrid cross is: [MOE 2008, 2055, I.E. 2004, IOM 1998][MOE 2008, 2055, I.E. 2004, IOM 1998]
- 3 :1
- 1 :2:1
- 12 :3 :1
- 9:3:3:1
2. The distance between two adjacent nitrogen bases of DNA is: [IOM 2005][IOM 2005]
3. The fundamental unit which is responsible for producing one polypeptide chain is: [MOE-2063][MOE-2063]
4. RNA is concerned with: [MOE-2062, 2055][MOE-2062, 2055]
- Osmosis
- Protein synthesis
- Photosynthesis
- Respiration
5. A cross between F1 hybrid and the recessive parent is: [MOE-2060, IOM 1998][MOE-2060, IOM 1998]
- Back cross
- Test cross
- Monohybrid cross
- Dihybrid cross
6. Theory of mutation is given by: [MOE-2003][MOE-2003]
- Haeckel
- Lamarck
- Darwin
- Hugo de Vries
7. Which is true about mutation? [MOE-2002][MOE-2002]
- Decrease in number of species
- Variation which leads to formation of new species
- Mutation is always beneficial
- None
8. Hybrids between 'red flowered' and 'white flowered' strains were crossed back to the pure 'red flowered' strain. The progeny of this cross had: [MOE-2058, 2056, 2054][MOE-2058, 2056, 2054]
- All red
- All white
- 1 red : 1 white
- 3 red : 1 white
9. Gene mutation takes place in: [MOE-2057][MOE-2057]
- Mitochondria
- Ribosomes
- DNA molecule
- Chloroplast
10. In DNA molecule, base pair is: [MOE 2056][MOE 2056]
- Cytosine and Guanine
- Adenine and Thymine
- Cytosine and Thiamine
- Both a & b
11. The genetic cross between pure red and pure white genes produce: [MOE-2055][MOE-2055]
- All red
- 3 red and 1 white
- All white
- Red and white in 9 : 3 : 3 : 1 ratio
12. DNA in which nitrogen base is paired as: [MOE-1997][MOE-1997]
- Adenine + guanine
- Cytosine + thymine
- Adenine + thymine
- None
13. Red and white flowers are crossed, offsprings are all red and this red flower is crossed with white flowers then F2 generation will be: [MOE][MOE]
- Red : white = 3:1
- Red : white = 2:2
- Red : white = 1:3
- White : red = 2 :1
14. In the process of crossing over, the separated chromatid segments are united by: [BPKIHS 1994][BPKIHS 1994]
- Endonuclease
- Exonuclease
- Unwindase
- R-protein
15. Smallest unit of mutation is [BPKIHS 1996][BPKIHS 1996]
16. If TAG CTA GCT ACG are the triplets of DNA, the codons of m-RNA will be: [BPKIHS 1996][BPKIHS 1996]
- ATC GAT CGA TGC
- AUC GAU CGA UGC
- TAG CTA GCT ACG
- AUC GAU GCT ACG
17. The number of chromosomes in Drosophila is: [BPKIHS 1997][BPKIHS 1997]
18. Genetic information is carried by long chain molecules made up of: [BPKIHS 1997][BPKIHS 1997]
- Amino acids
- Nucleotides
- Lipids
- Polysaccharides
19. If a haemophilic man marries a normal women, the chance of their sons being haemophilic [BPKIHS 1997][BPKIHS 1997]
20. The disease present only in female foetus is: [BPKIHS 1998][BPKIHS 1998]
- Turner's syndrome
- (b) Klinfilter's syndrome
- (c) Edward's syndrome
- (d) Down's syndrome
21. In the garden pea experiment, Mendel used: [BPKIHS 1998][BPKIHS 1998]
- Round and wrinkled seeds
- Tall and dwarf plants seeds
- Tall and round seeds
- None of the above
22. In Operon view, an operator gene combines with: [BPKIHS 1998][BPKIHS 1998]
- Structural gene to switch off regulator protein transcription
- Regulator protein to switch on structural gene transcription
- Regulator protein to switch off structural gene transcription
- None of the above
23. A colour blind father marries a mother whose father was colour blind. The resulting progeny is: [BPKIHS 1998][BPKIHS 1998]
- Normal son and colour blind daughter
- Colour blind son and normal daughter
- Both are normal
- Both are colour blind
24. The segment of DNA which directs protein synthesis [BPKIHS 1999][BPKIHS 1999]
- Nucleotide
- Nucleoside
- Deoxyribose sugar
- Mitochondria
25. If a tall plant Pisum sativum with red flower crossed with dwarf plant with white flower. How many plants are tall with white flower in F2 generation? [IOM 2002][IOM 2002]
26. Codon is contained in: [IOM 2004][IOM 2004]
27. What is present instead of Thymine in RNA? [IOM 1998][IOM 1998]
- Adenine
- Guanine
- Cytosine
- Uracil
28. DNA is building blocks of [IE - 2009][IE - 2009]
- Proteins
- Nucleotides
- Bases
- Deoxyribose
29. A short length of DNA molecule contains 120 adenine and 120 cytosine bases. The total no. of nucleotides in this DNA fragment is: [IOM 1998][IOM 1998]
30. Which of the following should be avoided while marriage: [IOM 1997][IOM 1997]
- Boy Rh- and girl Rh-
- Boy Rh+ and girl Rh-
- ( c ) Boy Rh+ and girl Rh+
- (d) Boy Rh- and girl Rh-
31. If a colour blind woman marries a normal man, their children will be:
- All colour blind
- Carrier daughters and colour blind sons
- Normal sons and colour-blind daughters
- Carrier sons and colour-blind daughters
32. The RNA molecule is synthesized from a single stranded DNA by the process of: [IOM 1997][IOM 1997]
- Transcription
- Translation
- Transduction
- Transversion
33. Mendel was successful in formulating the law of inheritance whereas his predecessors were not because: [IOM 1996][IOM 1996]
- Of the right choice of material
- He considered one clear-cut character at a time
- The characters he considered were present on separate chromosomes and showed no linkage
- All of the above
34. A colorblind women marries with a normal man. The progeny will be: [IOM 1996][IOM 1996]
- All colour blind
- All carrier
- Half colour blind and half carriers
- All normal
35. Identical twins are produced by fertilization of: [BPKIHS 2000, 2001][BPKIHS 2000, 2001]
- 1 ovum by 1 sperm
- 2 ova by 1 sperm
- 1 ovum by 2 sperms
- 2 ova by 2 sperms
36. How many amino acids are coded by 64 codons? [BPKIHS 2001][BPKIHS 2001]
37. The process in which m-RNA codes for protein is: [BPKIHS 2001][BPKIHS 2001]
- al Transformation
- Transcription
- Translation
- Transduction
38. When an albino plant is crossed with a normal plant, the resulting offspring is normal because: [BPKIHS 2001][BPKIHS 2001]
- Normal character is dominant over albino
- Atavism takes place
- Inheritance takes place through maternal cell
- Plants prefer normal character to albino
39. DNA has which sugar in it: [BPKIHS 2001][BPKIHS 2001]
- Hexose
- Ribose
- Deoxyribose
- Glucose
40. The most widely used method for prenatal detection of genetic disorders is: [BPKIHS 2001][BPKIHS 2001]
- Family tree
- Amniocentesis
- Karyotyping
- None of them
41. Which is wrong? [BPKIHS 2002][BPKIHS 2002]
- mRNA can directly be replicating by DNA fragments
- Okazaki fragments can be replicated by DNA
- Directly polypeptide can be replicated by DNA fragment
- Replicates always proceed in 5' - 3' direction
42. What is sticky ends? [BPKIHS 2002][BPKIHS 2002]
- End of DNA fragments with complementary base sliced by specific restriction enzyme
- Free ends of DNA molecules
- Places having Okazaki fragments
- Places where helicases act
43. Phenotype refers to: [BPKIHS 2002][BPKIHS 2002]
- Genetic constitution
- External appearance of an individual
- Gene defect
- Personal disabilities
44. Which is wrong? [BPKIHS 2002)[BPKIHS 2002)]
- Down's syndrome is due to trisomy
- Aneuploidy is not seen in human
- Genetic constitution of XXX are super females
- Gametes are always haploid
45. Which is not true about phenylketonuria? [BPKIHS 2002][BPKIHS 2002]
- 19) only one enzyme is deficient
- The disease is due to abnormal recessive gene
- Brain is also damaged
- Urine turns black on standing
46. True about human karyotyping: [BPKIHS 2003][BPKIHS 2003]
- RBC culture arrested in metaphase using colchicine
- Leucocyte culture arrested in prophase using vit. K
- Leucocyte culture arrested in metaphase using colchicine
- RBC culture arrested in telophase using vit. D
47. A man with brown eyes and dark hair (whose father was blue eyed) marries a women with blue eyes and dark curly hair (whose mother was red straight haired). They have four children what is the genotype of children: [BPKIHS 2004][BPKIHS 2004]
- BbRR : BbRr : bbRR : bbRr
- (6) BbRR : BbRr : bbRR : bbrr
- (c) BbRr : BbRr : BbRR : bbrr
- (d) BBRR : bbrr
48. Okazaki segments are [BPKIHS 2005][BPKIHS 2005]
- Segments of gene which undergoes duplication
- Segment of RNA formed during transcription
- Segment of DNA capable of replication
- A small chain of nucleotides formed during replication of DNA
49. Which of the following acts as codon? [BPKIHS 2005][BPKIHS 2005]
50. Which of the following terms represents the genes of contrasting expression of the same genetic trait? [BPKIHS 2007][BPKIHS 2007]
- Allelomorph
- (6) Phenotype
- (c) Homozygous
- (d) Heterozygous
51. Codon is: [BPKIHS 2007][BPKIHS 2007]
- A sequence of three nucleotides which codes for one amino acid
- A sequence of three nucleotides which codes for one fatty acid
- c) A sequence of four nucleotides which codes for one amino acid
- (d) A sequence of four nucleotides which codes for one fatty acid
52. DNA polymerase is required for the synthesis of? [BPKIHS 2007][BPKIHS 2007]
- a) DNA from DNA
- (b) DNA from RNA
- (c) DNA from nucleotide
- (d) DNA from nucleosides
53. Which among the following is known as "jumping genes" ?[BPKIHS 2007]
- Chondriogene
- Recon
- Transposon
- Peastogene
54. The probability of obtaining AaBbCc offsprings in the cross of AABbCc and aaBBcc is: [IE - 2001][IE - 2001]
55. The collection of molecules inside a cell is known as: [IE - 2001][IE - 2001]
- Cellular pool
- Gene pool
- Macromolecules
- All
56. In general independent assortment of chromosomes in cell with n pairs of chromosomes yields how many different kinds of gametes? [IE - 2002][IE - 2002]
57. The male chromosome of ant, bees & wasp is represented by [IE - 2002][IE - 2002]
58. In DNA, cytosine have same no. as that of [IE -2002][IE -2002]
- Adenine molecules
- Guanine molecules
- Pyrimidines
- Unpredictable
59. Down's syndrome is an example of: [IE -2002][IE -2002]
- Polyploidy
- Euploidy
- Polytene
- Aneuploid
60. The enzymes which unwind the strands of DNA helix are called: [IE - 2002][IE - 2002]
- Topoisomerases
- Helicase
- Primase
- DNA polymerase
61. The disease caused by pleiotropic gene is: [IE -2002][IE -2002]
- Syndrome
- Can be treated with gene therapy
- Can be treated with diet therapy
- All
62. The eukaryotic chromosomes differ from bacterial chromosomes in the presence of: [IE - 2002][IE - 2002]
- Start and stop signals
- Introns
- Thiamine instead of uracil
- Reverse transcriptase
63. In mendels experiment, he selected a pair of alleles for the tall and dwarf plants and a pair alleles for the round and wrinkled seeds. How many kinds of eggs the dwarf plant? [IE - 2002)[IE - 2002)]
64. Satellite DNA is [IE - 2003)[IE - 2003)]
- Repetitive DNA
- Segment forming sn RNA
- Segment forming sc RNA
- Both (b) and (c)
65. Which of the following crosses would produce genotype ratio of 1:2:1 in F2? [IE - 2003][IE - 2003]
- AB x AB
- Ab x ab
- AB x ab
- ab x ab
66. Down's syndrome is due to [IE - 2003][IE - 2003]
- Extra sex chromosome
- Extra 21st chromosome
- Extra Y chromosome
- Deficient sex chromosome
67. A good vector in genetic engineering is [IE -2003][IE -2003]
- Agrobacterium tumefaciens
- Bacillus thringiensis
- Bacillus amylaliquefaciens
- Salmonella typhimurium
68. Smallest segment of genetic material affected by mutation is: [IE - 2004][IE - 2004]
69. Nitrogenous bases in DNA are at a distance of [IE -2005][IE -2005]
- 3.4 nm
- 0.34 nm
- 34 mm
- 0.034 nm
70. Transcription means [E - 2000][E - 2000]
- Translation
- DNA replication
- RNA replication
- Protein synthesis
71. In DNA replication Okazaki fragments are Joined together by:
- DNA ligase
- polymerase
- Helicase
- primase
72. The recessive gene that always produces its effect [IE 2006][IE 2006]
- Pleiotropic gene
- Complementary gene
- Holandric gene
- Supplementary gene
73. Genes not located within nucleus are present in
- Cytoplasm
- Cytoskeleton
- Organelle
- Cytosol
74. In recombinant DNA technology, plasmid vector must be cleaved by:[[IE - 2008]]
- 4 types of enzyme
- Same DNA ligase that used in source
- Other enzymes
- Enzymes of same type
75. The syndrome in humans in which an individual somatic cells contain the 3 sex chromosomes XXX is: [IE - 2007][IE - 2007]
- Klinefelters
- Turners
- Down's
- Super female
76. Dihybrid cross is related to: [IE - 2008][IE - 2008]
- Principle of dominance
- Principle of independent assortment
- Principle of segregation
- Principle of purity of gametes
77. Kleinfelter's syndrome is:
- Due to XXY chromosome
- (b) Due to XXX chromosome
- (c) Due to XYY chromosome
- (d) Due to deletion of X chromosome in 21st pair
78. Down's syndrome in human beings is due to [IE -2005][IE -2005]
- Three copies of chromosome 21st
- Monosomy
- Two Y chromosomes
- Three X chromosomes
79. The phenomenon in which a gene controls more than one trait is: [IE -2001][IE -2001]
- Epistasis
- Pleiotropy
- Polygenic trait
- Complementary gene
80. Theory of continuity of germplasm was put forward by: [MOE 2010][MOE 2010]
- Bateson
- Hugo de Vries
- Darwin
- Weismann
81. In DNA, adenine combines with [BPKIHS - 2016][BPKIHS - 2016]
- Thymine
- Guanine
- Cytosine
- Uracil
82. In human syndrome in which there is XXY chromosome in body [BPKIHS - 2016][BPKIHS - 2016]
- Turner's syndrome
- Klinefelter's syndrome
- Down's syndrome
- Super male
83. Sex - linked disease is [BPKIHS - 2016][BPKIHS - 2016]
- AIDS
- Colour blindness
- Syphilis
- Gonorrhea
84. Non - sense codon [BPKIHS - 2016][BPKIHS - 2016]
85. Haemophilia is caused due to deficiency of clotting factor? [BPKIHS 2014][BPKIHS 2014]
- Factor VIII
- Vit. C and Vit. K
- IX and X
- VII
86. Transposons are [BPKIHS- 2014][BPKIHS- 2014]
- Jumping genes
- Satellite DNA
- Repetitive DNA
- Promiscous DNA
87. ABO blood group is an example of [BPKIHS - 2013][BPKIHS - 2013]
- Incomplete dominance
- Multiple allelism
- Epistasis
- Co-dominance
88. 2n + 1 chromosome are found in [BPKIHS - 2013][BPKIHS - 2013]
- Trisomy
- Aneuploidy
- Monosomy
- Tetrasomy
89. The function of RNA polymerase in transcription is [BPKIHS - 2013][BPKIHS - 2013]
- DNA to m - RNA
- m - RNA to t - RNA
- t - RNA to m - RNA
- m - RNA to DNA
90. Cross done to study a single character between 2 hybrids is called [BPKIHS - 2013][BPKIHS - 2013]
- Monohybrid cross
- Dihybrid cross
- Back cross
- Test cross
91. When two hybrid tall plants are crossed, then % of dwarf plant is: [BPKIHS - 2013][BPKIHS - 2013]
92. Adenine pairs with what in DNA [BPKIHS - 2012][BPKIHS - 2012]
- Guanine
- Thymine
- Uracil
- Mongolism
93. XXY chromosome is [BPKIHS - 2012][BPKIHS - 2012]
- Klinefelter's syndrome
- Turner's syndrome
- Super female
- Mongolism
94. If the haploid condition in plant has 7 number of chromosomes in its octaploid will be [BPKIHS 2011][BPKIHS 2011]
95. Mendelian factors is segregated during [BPKIHS - 2011][BPKIHS - 2011]
- Mitosis
- Amitosis
- Meiosis
- Budding
96. If the character of a gene is suppressed by the another non - allelic gene, then the suppressed gene, can be termed as [BPKIHS - 2011][BPKIHS - 2011]
- Epistatic
- Hypostatic
- Epistaxis
- Pleotropic gene
97. Webbed neck is found in syndrome? [BPKIHS - 2011][BPKIHS - 2011]
98. The condition of gynaecomastism is due to genetic disorder called Klinfelter's syndrome in which the heterosome consists of: [BPKIHS - 2011][BPKIHS - 2011]
99. β-DNA has its diameter of size [BPKIHS - 2010][BPKIHS - 2010]
100. Karyology deals with [BPKIHS 2011][BPKIHS 2011]
- Cell
- Nucleus
- Nucleolus
- Ribosome
101. Genetic recombination is due to [BPKIHS - 2010][BPKIHS - 2010]
- Linkage
- Crossing over
- Mutation
- Co - dominance
102. Barr bodies is present in [BPKIHS - 2010][BPKIHS - 2010]
- Autosome in female
- Autosome in male
- X - chromosome in male
- X - chromosome in female
103. How many autosomes are present in human [BPKIHS - 2013][BPKIHS - 2013]
- 21 pairs
- 22 pairs
- 23 pairs
- 46 pairs
104. 'One gene one enzyme' is discovered from [BPKIHS - 2013)[BPKIHS - 2013)]
- Mirabilis jalpa
- Lathyrus odoratus
- Neurospora crassa
- Sorgham
105. The first evidence of DNA as a genetic material is [IOM-2016][IOM-2016]
- DNA is formed by chromosome
- DNA is enclosed within nucleus
- Transformation of bacterial DNA
- DNA is not found in cytoplasm
106. Down's syndrome is [IOM-2016][IOM-2016]
- Trisomy
- Triploidy
- Monosomy
- Polyploidy
107. Which one is characteristic sugar of DNA? [IOM-2013][IOM-2013]
- Deoxyribose
- Nucleotides
- Nucleoproteins
- Nucleosides
108. Nucleic acid is polymer of [IOM-2013][IOM-2013]
- Globulins
- Nucleotides
- Nucleoproteins
- Nucleosides
109. DNA is genetic material because [IOM-2012][IOM-2012]
- it is found in nucleus
- produce t-RNA
- can replicate
- can transform
110. In RNA, uracil is present instead of [IOM-2012][IOM-2012]
- Adenine
- Cytosine
- Guanine
- Thymine
111. Test cross is cross between [MOE 2014][MOE 2014]
- Cross between F1 hybrid and dominant parent
- Cross between F1 hybrid and any of the parent
- Cross between F1 hybrid and F hybrid
- Cross between F1 hybrid and recessive parent
112. Which of the following enzyme is also called molecular scissors? [MOE 2014][MOE 2014]
- DNAse
- DNA polymerase
- Restriction endonuclease
- Protease
113. One of the examples of sex-linked trait is [MOE 2014][MOE 2014]
- Sickle cell anemia
- Typhoid
- Color blindness
- AIDS
114. Which one is a sex linked disease? [MOE 2012][MOE 2012]
- Color blindness
- Anemia
- Albinism
- Plague
115. What is the phenotypic proportion of dihybrid cross [MOE 2068][MOE 2068]
116. Pentose sugar is [MOE 2060][MOE 2060]
- Monosaccharide
- Diasachharide
- Polysachharide
- Compound carbohydrate
117. An exception of Mendel's law is [MOE 2060][MOE 2060]
- Independent assortment
- Law of dominance
- Linkage
- Purity of gametes
118. When a dihybrid ratio is obtained in a ratio of 1:4:6:4:1 instead of 9:3:3:1, it represents [MOE 2010][MOE 2010]
- Complementary genes
- Supplementary genes
- Polygenic inheritance
- Pleiotropic genes
119. Pair of contrasting character is known as [MOE 201)[MOE 201)]
- gene
- allele
- crossing over
- mutation
120. Duplication of RNA on DNA template is [MOE 2010][MOE 2010]
- Transcription
- Translation
- Transformation
- Transduction
121. Nucleic acid is [MOE 2010][MOE 2010]
- Phosphate + Sugar
- Protein + Phosphate
- Phosphate + Sugar + Heterocyclic nitrogen base
- Phosphate + Lipid
