Which organism has more base pairs ?
1. E.coli
2. Bacteriophage
3. human
4. Yeast
How many types of nitrogenous bases are present in nucleic acid
(1) 4
(2) 3
(3) 5
(4) 6
Distance between two consecutive nucleotide pairs of DNA is
(1)0.34nm
(2)34angstrom
(3)3.4 micrometre
(4)34nm
In rRNA, thymine pairs with
(1)adenine
(2)uracil
(3)both 1 and 2
(4)None of these
Which one of the following nucleotide sequences contains only 4 pyrimidine bases?
(1)UAGCGGUAA
(2)TGCCTAACG
(3)GATCAATGC
(4)GCUAGACAA
Regulation of gene expression in eukaryotes cannot take place at
(1)primary transcript level
(2)splicing level
(3)transport of m-RNA from nucleus to cytoplasm
(4)replication level
The conditions which regulate the expression of genes are
(1)Environmental
(2)Physiological
(3)Metabolic
(4)All of the above
The development and differentiation of embryo into adult organisms are result of
(1)chemical regulation of expression of several sets of genes
(2)Electrical and Chemical regulation of expression of several sets of genes
(3)coordinated regulation of expression of several sets of genes
(4)All of above
Promoter regions of lac operon can be accessed by
(1)RNA polymerase
(2)DNA polymerase
(3)Proteins
(4)All of these
The lac in lac operon refers to
(1)lactose but not lactase
(2)lactase but not lactose
(3)lactobacillus but not lactose
(4)lactose as well as laevorotatory