A gamete contains which of the following :
1.Both alleles of a gene
2. Only one allele of a gene
3. Al allele of a gene
4. No allele
A point mutation is:
1. Thalassemia
2.Sickel-cell anaemia
3. Down’s syndrome
4.Nightblindness
A ribotide is made up of:
1. Ribose + Phosphate + Uracil
2. Deoxribose + Uracil + Phosphate
3. Thymine + Ribose + Phosphate
4.Deoxyribpse + Phosphate + Adenine
A strong mutagen is:
1. Cold
2.Heat
3.Water
4.X-rays
A true hybrid condition is:
1. tt Rr
2. Tt rr
3. tt rr
4. Tt Rr
Amino acid sequence, in protein synthesis is decided by the sequence of?
1.c-DNA
2.r-RNA
3.f-RNA
4. m-RNA
An lndividual with into identical alleles is:
1.Hybrid
2. Dominant
3. Homozygous
4.Heterozygous
An organism with two unlike genes of a trait is called :
1. Homozygous
2.Hetrozygous
3. Both of these
4. None of these
Anticodon found in:
1.On DNA
2. On t-RNA
3.On r-RNA
4. On m-RNA
Antiparallel strands of a DNA molecule means that:
1.One strand turns clockwise
2.One strand turns anticlockwise
3.The phosphate groups at the start of two DNA strands are in opposite position
4.The phosphate groups at the start of two DNA strands, at their ends, share the same position
Cause of chromosomal mutation:
1. Euploidy
2. Polyploidy
3. Physical effect
4. All of these
DNA fragments are joined in a correct sequence by :
1.DNA ligase
2. RNA polymerase
3.Helicase
4.DNA polymerase
DNA multiplication is also called:
1. Replication
2.Transduction
3. Translation
4. Transcription
DNA repairing is done by:
1. By DNA polymerase I
2. By DNA Polymerase II
3.Both (a) and (b)
4. By Ligase
Down’s syndrome is a:
1.Mendelian disorder
2. Chromosomal disorder
3.can be both
4. None of these
During DNA synthesis formed segment is:
1. Polymerase fragment
2. RNA fragment
3. Okazaki fragment
4.RNA Primer
During Protein synthesis, atone point the process comes to a halt. Select the group of the three codons from the following, from which any one of the three could bring about this halt:
1.UUC, UUA, UAC
2. UAG, UGA, UAA
3.UUE, UCA, UCG
4. UUU, UCC, UAU
During splicing axon attached and inducer enzyme for reaction:
1.RNA Ligase
2. RNA Catalase
3.RNA permease
4. RNA poloymerase
Exception of Mendel’s law is:
1.Dominance
2. Purity of gametes
3. Linkage
4. Independent assortment
Failure of segregation of chromatids during cell division Cycle result in the gain or loss of a cromosome (s) is called :
1.Female heterogamety
2. Male heterogamety
3.Aneuploidy
4.None of these
Female heterogamety is :
1.Two different types of gametes are produced by females
2. Four different types of gametes are produced by males
3.Can be both (a) and (b)
4.None of these
First geneticist/father of genetics was:
1.de Vries
2. Mendel
3. Darwin
4.Morgan
Following is important in Ãranscription:
1. DNA Methylase
2.CAAT Box
3.Promotar
4. DNA Polymerase
Genes located on V-chroinosome are:
1.Mutant genes
2. Autosomal genes
3. Holandric genes
4. Sex-linked genes
Gunetical identification of male human is:
1.By Nucleus
2. By cells
3.By Autosome
4. By Sex-chromosome
Haemophilia is a:
1. Mendelian disorder
2. Chromosomal disorder
3. Can be (a) or (b)
4.None of these
In a give DNA segment ATC ACC AGG ACC CCA ACA, the first base gets mutated. The effect of this on coding by the DNA segment will result in :
1. One amino acid less in protein
2.No change in the sequence
3.Complete change in the type and sequence of amino acid
4.Change in first amino acid only
In DNA helix:
1. Quadrate structure
2. Polarity
3.Antiparallel Polarity
4. Disuiphide bond
Mendal was born in:
1.17th century
2. 18th century
3. 19th century
4. 8th century
Mendal’s law can be applicable only when:
1.Characters are linked
2. Parents are pore breed
3.F1 generation in monohybrid cross show 2 type of individuals
4. Onepair of contiasting characters depends on another pair
Mendel published his work on inheritance of character in?
1.1870
2.1900
3. 1865
4. 1845
Mendel worked on :
1.Edible pea
2. Wild pea
3.Garden Pea
4. None of these
Mendel’s formulated the law of purity of gametes on the basis of:
1.Test cross
2.Back cross
3. Monohybrid cross
4. Dihybrid cross
Mendel’s laws were discovered by:
1. Correns
2. Shermak
3. de meris
4.All of these
Mendel’s second law is of the law of:
1. Segregation
2. Dominance
3. Polygenic inheritance
4.Independent assortment
Most of the mutations are:
1. Recessive
2.Harmful
3.Germinal
4.All of these
Name the scientist who discovered the law of Heredity :
1. Gregor Mendel
2.Newton
3.Piinnett
4.None of these
One turn of the helix in p-from DNA is approximately:
1.20 Ã…
2. 2 nm
3. 20 nm
4. 34 nm
Punnett square was developed by:
1. Mendel
2. Watson and Sutton
3. Raginald
4. Boveri
Represser Lac-Operon protein attached to:
1. Operator
2. Inducer
3. Regulator
4.β-Glacto sidase
Rh+ individual gene may be:
1. rr
2. TT
3. Rr
4.Both (a) and (c)
Smallest segment of genetic material affected by mutation is :
1.Recon
2. Cistron
3.Muton
4. Exon
The allele which is unable to express its effect in the presence of another is called :
1.Co-dominant
2. Supplementary
3.Complementary
4.Recessive
the enzyme involved in transcription is:
1. DNA Polymerase I
2. DNA Polymerase II
3. RNA Polymerase
4. DNA Polymerase
The plant Mendel used to study inheritance of two genes is:
1. Apple
2. Mango
3. Garden pea
4. Potato
The ratio constant for a species is :
1. T+C/G + A
2.A+C/T + G
3. G + G/A + T
4.A + C/C + T
tt mates with Tt. What will be characteristic of offspring:
1. 75% Ineffective
2. 50% Uneffective
3. 25% Uneffective
4.All Effective
Two genes very close on a chromosome will show:
1.No crossing over
2. High crossing over
3.Hardly an crossing over
4. Only double crossing overy
Which one is mainly transcribed:
1.Only RNA sequence
2. Middle repetitive DNA sequence
3. Highly repetitive DNA sequence
4.Single copy of DNA sequence
Who introduced Chromosomal Theory of Inheritance?
1. Mendel
2.Sutton
3.Reginald
4.Boveri