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 […]
In his classic experiments on sea plants,Mendel did not use
Options
(a) Pod length (b) Seed shape (c) Flower position (d) Seed colour
Correct Answer:
Pod length
Explanation:
No explanation available. Be the […]
Identify the correct order of organisation of genetic material from largest to smallest :
Options
(a) Genome, chromosome, nucleotide, gene (b) Genome, chromosome, gene, nucleotide (c) Chromosome, genome,nucleotide, gene (d) Chromosome, gene,genome, nucleotide
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 […]
Fruit colour in squash is an example of:
Options
(a) Recessive epistasis (b) Dominant epistasis (c) Complementary genes (d) Inhibitory genes
Correct Answer:
Dominant epistasis
Explanation:
Epistasis is the phenomenon of suppression of […]
Commonly used vectors for human genome sequencing are:
Options
(a) T- DNA (b) BAC and YAC (c) Expression Vectors (d) T/A Cloning Vectors
Correct Answer:
BAC and YAC
Explanation:
Human genome sequencing is […]
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 pleiotropic gene:
Options
(a) is a gene evolved during Pliocene (b) controls a trait only in combination with another gene (c) controls multiple traits in an individual (d) is expressed only in […]
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