In the ribose of RNA, unlike DNA, every nucleotide residue has an additional
COOH group in the 2'position
OH group in the 5' position
OH group in the 2'position
Phosphate group in the 2' position
Phosphate group in the 2' position
DNA replicates semi-conservatively was first shown in
Vicia faba
E. coli
Streptococcus pneumoniae
Drosophila
Drosophila
The enzyme that catalyses transcription of RNA in bacteria
DNA dependent RNA polymerase
RNA polymerase I
DNA polymerase
RNA polymerase II
RNA polymerase II
A molecule to act as a genetic material has the following properties
(i) should be able to replicate
(ii) should be structurally more stable
(iii) should be more reactive and labile
(iv) should provide scope for slow changes
Choose the correct option
(i), (ii) and (iii) are correct
(iii) alone is correct
(iii) and (iv) are correct
(i), (ii) and (iv) are correct
(i), (ii) and (iv) are correct
Choose the correct statement among the following
Taylor and his colleagues used E.coli to prove semi-conservative replication of DNA
In Griffith's experiment the mice infected with R-strain of Streptococcus pneumoniae died due to pneumonia.
Hershey and Chase proved the transforming principle experimentally
Meselson and Stahl grew staphylococcus in a medium containing cesium chloride to prove DNA is the genetic material
Meselson and Stahl grew staphylococcus in a medium containing cesium chloride to prove DNA is the genetic material
The precursor of eukaryotic mRNA is
5srRNA
tRNA
rRNA
snRNA
snRNA
E.
hnRNA
The RNA polymerase II transcribes precursor of mRNA,the heterogenous nuclear RNA (hnRNA).
The disorder caused by point mutation is
Down's syndrome
Sickle cell anemia
Klinefelter's syndrome
Tetany
Tetany
Identify the wrongly labelled part
Primary follicle
Ovum
Graafian follicle
Corpus luteum
Corpus luteum