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 Multiple Choice QuestionsMultiple Choice Questions


Satellite DNA is a useful tool in

  • Organ transplantation

  • Sex determination

  • Forensic science

  • Genetic engineering


Select the correct statement from the one’s given below with respect to dihybrid cross.

  • Tightly linked gene on the same chromosome show higher recombinations

  • Genes for apart on same chromosomes show very few recombination

  • Genes loosely linked on the same chromosomes show similar recombination as lightly linked ones

  • Tightly linked genes on the same chromosomes show very few recombination


Maximum green house gases are released by

  • India

  • Britain

  • USA

  • France


Allelic sequence variation where more than one variant allele at a locus in a human population with a frequency greater than 0.01 is referred to as

  • DNA polymorphism

  • Multiple allelism

  • SNP

  • EST


The statement All biological catalysts are protein is no longer valid after the discovery of

  • ribonuclease

  • ribozyme

  • RNAs

  • DNAs


The chromosome of cell duplicate during the

  • S-phase of cell cycle

  • G1-phase of cell cycle

  • G2-phase of cell cycle

  • Prophase of cell division


Consider these following sentences and choose the correct ones.

(I) Each gene contains a specific promoter region and a leader sequence for guiding the beginning of transcription.

(II) Only one strand of DNA, called template strand is copied by RNA polymerase this strand runs in 3ʹ → 5ʹ direction.

(III) RNA polymerase adds complementary nucleotides forming single strand mRNA in 3ʹ → 5ʹ direction.

(IV) Section of DNA that has been transcribed is rewound into its original configuration.

  • II, III and IV

  • II and IV

  • I, II and IV

  • I, II, and IV


The fact that DNA is a genetic material was established by the experiment of

  • Meselson and Stahl

  • Hershey and Chase

  • Avery, Macleod and McCarty

  • Rosalind Franklin and Kornberg


Which of the following is the Pribnow box?

  • 5′-TATAAT-3′

  • 5′-TAATAT-3′

  • 5′-AATAAT-3

  • 5′-ATATTA-3′


The genome of Caenorhabditis elegans consists of

  • 3 billion base pairs and 30,000 genes

  • 12 million base pairs and 6000 genes

  • 4.7 million base pairs and 4000 genes

  • 97 million base pairs and 18,000 genes