Chemical basis of heredity is?
DNA
RNA
Histones
None
Related Questions
Which statement is FALSE regarding homologous chromosomes?
They are separated during meiosis I.
They carry genes for the same traits.
They are identical copies of each other.
They pair up during meiosis.
Out of A-T, G-C pairing, bases of DNA may exist in alternate valency state owing to arrangements called
Tautomerisational mutation
Analogue substitution
Point mutation
Frameshift mutation
Which of the following statements regarding histones is INCORRECT?
They are rich in basic amino acids like lysine and arginine.
They have a net positive charge at physiological pH.
Post-translational modifications of histones neutralize their positive charge.
They form the core of nucleosomes.
Histones are crucial for DNA packaging. Which of the following is NOT a characteristic of these proteins?
Rich in basic amino acids
Positively charged
Primarily composed of carbohydrates
Synthesized mainly during S phase
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
Which of the following statements accurately describes a characteristic of homologous chromosomes?
They carry genes for the same traits at corresponding loci.
They are identical copies of each other.
They are always inherited from the same parent.
They are only present in somatic cells.
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 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
Statement 1: Adenine cannot pair with cytosine
Statement 2: Adenine and cytosine do not have a perfect match between hydrogen donor and hydrogen acceptor sites. Hence, they cannot pair
Statement 1 is True; Statement 2 is True; Statement 2 is correct explanation for Statement 1
Statement 1 is True; Statement 2 is True; Statement 2 is not correct explanation for Statement 1
Statement 1 is True, Statement 2 is False
Statement 1 is False, Statement 2 is True
Which of the following enzymes is NOT directly involved in DNA replication?
DNA polymerase
Helicase
Primase
RNA polymerase
