In sea urchin DNA, which is double stranded,17% of the bases were shown to becytosine.The percentages of the other three bases expected to be present in this DNA are:-
Options
(a) G17%, A […]
How many pairs of contrasting characters in pea plants were studied by Mendel in his experiments ?
Options
(a) Six (b) Eight (c) Seven (d) Five
Correct Answer:
Seven
Explanation:
No explanation available. […]
Gene regulation governing lactose operon of E.coli that involves the lac I gene product is :
Options
(a) Negative and inducible because repressor protein prevents transcription (b) Negative and repressible because repressor protein […]
An abnormal human baby with ‘XXX’ sex chromosomes was born due to :
Options
(a) formation of abnormal ova in the mother (b) fusion of two ova and one sperm (c) fusion of […]
Alleles are:
Options
(a) true breeding homozygotes (b) different molecular forms of a gene (c) heterozygotes (d) different phenotype
Correct Answer:
different molecular forms of a gene
Explanation:
No explanation available. Be the […]
A man with blood group ‘A’ marries a woman with blood group ‘B’. What are all the possible blood groups of their offsprings?
Options
(a) A,B and AB only (b) A,B,AB and O […]
Which of the following had the smallest brain capacity ?
Options
(a) Homo sapiens (b) Homo neanderthalensis (c) Homo habilis (d) Homo erectus
Correct Answer:
Homo habilis
Explanation:
Brain capacity in decreasing order : […]
Which of the following is not one of the prime health risks associated with greater UV radiation through the atmosphere due to depletion ofstratospheric ozone ?
Options
(a) Reduced Immune System (b) Damageto […]
High value of BOD(Biochemical OxygenDemand) indicates that :
Options
(a) Water is highly polluted (b) Water is less polluted (c) Consumption of organic matter in the water is higher by the microbes (d) […]
Which of the following enhances or induces fusion of protoplasts ?
Options
(a) Polyethylene glycol and sodium nitrate (b) IAA and kinetin (c) IAA and gibberellins (d) Sodium chloride and potassium chloride
Correct […]
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