Related Questions
Which of the following is not relevant to the structure of double helical DNA?
Hydrogen bonds
Phosphodiester bonds
Base stacking interactions
Peptide bonds
Unlike DNA, RNA typically does NOT:
Contain uracil
Contain ribose sugar
Participate in protein synthesis
Form a double helix structure
Which of the following is in correct w.r.t nucleosides?
Cytosine
Guanosine
Adenosine
Uridine
Which one of the following statements about Histones is wrong?
Histones are positively charged proteins.
Histones help in packaging of DNA in eukaryotes.
There are five main types of histones.
Histones are found in prokaryotic cells.
A molecule suitable to be the carrier of genetic information should possess all these qualities EXCEPT:
Ability to replicate
Stable structure
Capacity to express information
High reactivity
A molecule that can act as a genetic material must fulfill the traits given, except
it should provide the scope for slow changes that are required for evolution
it should be able to express itself in the form of ‘Mendelian characters’
it should be able to generate its replica
it should be unstable structurally and chemically
Which of the following is NOT a crucial characteristic for a molecule to serve as genetic material?
Stable
Replicable
Capable of expressing information
Readily degradable
Statements
I. The four nucleotide bases are not necessarily present in DNA in exact equal
proportions.
II. The total amount of purines are equal to the total amount of pyrimidines.
III. DNA ligase enzyme act to hydrolyse or breakdown a polynucleotide chain into
its component nucleotides.
IV. Nuclease enzymes are capable of restoring an intact DNA duplex.
Of the above statements
II is correct, but I, III and IV are wrong
I and II are wrong but III and IV are correct
I, II and III are correct but IV is wrong
I and II are correct but III and IV are wrong
A mutation changes a codon from UCG to UAG. This mutation is a:
Missense mutation
Silent mutation
Frameshift mutation
Nonsense mutation
In a prokaryotic cell, the ratio of is
1
< 1
1
None of these
