One turn of the helix in a B-form DNA is approximately:
(1) 20 nm
(2) 0.34 nm
(3) 3.4 nm
(4) 2 nm
Antiparallel strands of a DNA molecule means that:
(1) one strand turns anti-clockwise
(2) the phosphate groups of two DNA strands, at their ends, share the same position
(3) the phosphate groups at the start of two DNA strands are in opposite position (pole)
(4) one strand turns clockwise
Complete genomic sequence of the following plant has been recently announced is
(1) Arabidopsis thaliana
(2) Tritium vulgare
(3) Cucurbita pepo
(4) Pisum sativum
Transcription in case of eukaryotes takes place in
(1) nucleus
(2) nucleolus
(3) cytoplasm
(4) ribosome
Which of the following is nonsense codon?
(1) UAG
(2) UAA
(3) UGA
(4) all the above
Frameshift mutation occurs when
(1) base is substituted
(2) base is deleted or added
(3) anticodons are absent
(4) none of these
What is true about tRNA?
(1) It binds with an amino acid at it 3’ end
(2) It has five double stranded regions
(3) It has a codon at one end which recognizes the anticodon on messenger RNA
(4) It looks like clover leaf in the three dimensional structure.
Which one of the following codons codes for the same information as UGC?
(1) UGU
(2) UGA
(3) UAG
(4) UGG
The total number of nitrogenous bases in human genome is estimated to be about
1. 3.5 million
2. 35 thousand
3. 35 million
4. 3.1 billion
Which one of the following pairs is correctly matched with regard to the codon and the amino acid coded by it?
(1) UUA - valine
(2) AAA - lysine
(3) AUG - cysteine
(4) CCC - alanine