Genetic Matieraial-DNA And RNA Test

Genetic Matieraial-DNA And RNA

This is online test 02 for CBSE class 12 Biology Molecular Basis of Inheritance (Genetic matieraial-DNA and RNA).. There are 10 questions in this test with each question having around four answer choices.

Questions & Answers

1
Which statement is not correct about the DNA?
  • A
    DNA occurs in all cells
  • B
    All cell of an individual have the same amount of DNA
  • C
    It is the constituent of chromosomes
  • D
    DNA content is halved during mitosis
    Correct
2
Beadle and Tatum showed that each kind of mutant bread mould they studied lacked a specific enzyme. Their experiments demonstrated that
  • A
    Cells need specific enzymes in order to function
  • B
    Genes are made of DNA
  • C
    Gene carry information for making proteins
    Correct
  • D
    Enzymes are required to repair damage
3
A single strand of nucleic acid tagged with a radioactive molecule is called
  • A
    Plasmid
  • B
    Selectable marker
  • C
    Probe
    Correct
  • D
    Vector
4
A phenomenon where the third base of t-RNA at its 5’ end can pair with a non-complementary base of m-RNA is called
  • A
    Universality
  • B
    Collinearity
  • C
    Wobbling
    Correct
  • D
    Degeneracy
5
DNA has equal number of adenine and thymine residues (A = T) and equal number of guanine and cytosine (G = C). These relationships are known as
  • A
    Van’t Hoff plot
  • B
    Le-Chatelier’s principle
  • C
    Chargaff’s rule
    Correct
  • D
    Coulomb’s law
6
What does A & B represent?
Question 6 figure 1
  • A
    Double Stranded Protein, Helicase
  • B
    Helicase, Single strand binding protein
    Correct
  • C
    Grycase , Helicase
  • D
    Topoisomerase Helicase
7
In DNA, sugar is attached to nitrogenous base (purine or pyrimidine) through
  • A
    Phosphodiester linkage
  • B
    Glycosidic bond
    Correct
  • C
    Hydrogen bond
  • D
    Carboxylic bond
8
In the DNA molecule:
  • A
    The proportion of A in relation to T varies with the organism
  • B
    The total amount of purine nucleotides and pyrimidine nucleotides are not always equal
  • C
    There are two strands which run parallel in the \(5' \to 3'\)direction
  • D
    There are two strands which run antiparallel one in the \(5' \to 3'\)direction and other in the \(3' \to 5'\)
    Correct
9
Copying of DNA to make more DNA copies is called DNA replication. Replication occurs by method of
  • A
    Semi-conservative
    Correct
  • B
    Regeneration
  • C
    Conservative
  • D
    Destructive
10
HIV is classified as a retrovirus because its genetic information is carried in
  • A
    RNA instead of DNA
    Correct
  • B
    DNA instead of RNA
  • C
    Protein coat
  • D
    DNA