CBSE
Multiple Choice QuestionsConsider 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 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
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′
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
The statement All biological catalysts are protein is no longer valid after the discovery of
ribonuclease
ribozyme
RNAs
DNAs
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
Satellite DNA is a useful tool in
Organ transplantation
Sex determination
Forensic science
Genetic engineering
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
Maximum green house gases are released by
India
Britain
USA
France
