Uridine, present only in RNA is a
Options
(a) Pyrimidine (b) Nucleoside (c) Nucleotide (d) Purine
Correct Answer:
Nucleoside
Explanation:
No explanation available. Be the first to write the explanation for this question […]
Infectious proteins are present in:
Options
(a) Gemini viruses (b) Prions (c) Viroids (d) Satellite viruses
Correct Answer:
Prions
Explanation:
Infections proteins are rich in prions. Prions are made of proteins without nucleic […]
Down’s syndrome in humans is due to
Options
(a) Two ‘Y’ chromosomes (b) Three ‘X’ chromosomes (c) Three copies of chromosomes 21 (d) Monosomy
Correct Answer:
Three copies of chromosomes 21
Explanation:
Down’s […]
In an inducible operon, the genes are
Options
(a) Always expressed (b) Usually not expressed unless a signal turns them “on” (c) Usually expressed unless a signal turns them “off” (d) Never expressed
Gentic variation in a population arises due to
Options
(a) Mutations only (b) Recombination only (c) Mutations as well as recombination (d) Reproductive isolation and selection
Correct Answer:
Mutations as well as recombination
A sequential expression of a set of human genes
Options
(a) messenger RNA (b) DNA sequence (c) ribosome (d) transfer RNA
Correct Answer:
DNA sequence
Explanation:
A sequential expression of a set of […]
The incorrect statement with regard to Haemophilia is:
Options
(a) It is a recessive disease (b) It is a dominant disease (c) A single proein involved in the clotting of blood is affected […]
Inheritances of skin colour in humans is an example of
Options
(a) point mutation (b) polygenic inheritance (c) codominance (d) chromosomal aberration
Correct Answer:
polygenic inheritance
Explanation:
Inheritance of skin colour in human […]
If one strand DNA has the nitrogenous bas sequence at ATCTG, what would be the complementary RNA strand sequence
Options
(a) TTAGU (b) UAGAC (c) AACTG (d) ATCGU
Correct Answer:
UAGAC
Explanation:
Sequence […]
Semi-conservative replication of DNA was first demonstrated in:
Options
(a) Escherichia coli (b) Streoticiccys obeynibuease (c) Salmonella typhimurium (d) `Drosphila melanogaster
Correct Answer:
Escherichia coli
Explanation:
Semi conservative replication of DNA was first […]
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