Molecular Basis of Inheritance Set 1

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This set of Biology Multiple Choice Questions & Answers (MCQs) focuses on Molecular Basis of Inheritance Set 1

Q1 | Genetic information is carried by the long chain molecules which are made up of
  • Amino acids
  • Nucleotides
  • Chromosomes
  • Enzymes
Q2 | By which bonds the purine & pyrimidine pairs of Complementary Strands of DNA held together?
  • H - bonds
  • O - bonds
  • C - bonds
  • N - bonds
Q3 | State the nature of the 2 Strands of DNA duplex.
  • identical & Complementary
  • Anti parallel & complementary
  • Disimilar & non - complementary
  • Anti parallel & Non - complementary
Q4 | The code AUG stands for
  • Glycine
  • Methionine
  • N-formyl methionine
  • A lanine
Q5 | A Codon is made up of
  • Single nucleotide
  • two nucleotides
  • three nucleotides
  • Four nucleotides
Q6 | Nucleus of a cell is the site of Synthesis of
  • DNA
  • m - RNA
  • t - RNA
  • All
Q7 | DNA replication requires
  • DNA polymerase only
  • DNA polymerase and ligase
  • Ligase only
  • RNA polymerase
Q8 | The enzyme involved in transcription is
  • RNA polymerase
  • DNA polymerase I
  • DNA polymerase II
  • DNA polymerase III
Q9 | Enzymes needed for formation of repliction fork
  • RNA polymerase and DNA polymerase I
  • Helicase and gyrase
  • Hexokinase and aldolase
  • Ligase and endo nuclease
Q10 | Okazaki fragments are Synthesized on
  • Leading strands of DNA only
  • Lagging Strands of DNA only
  • Leading and LaggingStrands
  • Complementary DNA Strand
Q11 | Which of the following is used in DNA multiplication?
  • RNA polymerase
  • DNA endonuclease
  • DNA exonuclease
  • DNA Polymerase
Q12 | t - RNA attaches aminoacid at its
  • 31 end
  • 51 end
  • Anticodon
  • Loop
Q13 | DNA acts as a template for synthesis of
  • RNA
  • DNA
  • Both ‘a’ and ‘b’
  • Protein
Q14 | Antiparallel strand in DNA is due to
  • Disulphide linkage
  • Hydorgen bond
  • Phosphodiester bond
  • Ionic bond
Q15 | Multiplication of DNA is called
  • Translation
  • Replication
  • Transduction
  • Transcription
Q16 | Which is the smallest RNA ?
  • r RNA
  • m RNA
  • t - RNA
  • nuclear RNA
Q17 | Genetic information are transfered from nucleus to cytoplasm of cell through
  • DNA
  • RNA
  • Lysosomes
  • Anticodon
Q18 | The information from RNA to DNA are transfered by which process
  • Replication
  • Transcription
  • Translation
  • Reverse transcription
Q19 | Which statement is correct ?(A) Degeneracy of code is related to third member of codon(B) Single codon, codes for more than one aminoacid(C) In codon first two bases are more specific(D) In codons third base is wobble(E) code is universal
  • A,B,C,D,E
  • A, B, D
  • A., C, D
  • A, C, D, E
Q20 | DNA molecule has uniform diameter due to ?
  • Double stranded
  • Presence of phosphate
  • Specific base pairing between purine and pyrimidine
  • Specific base pairing between purine and purine
Q21 | In a transcription unit promotor is said to be located towards
  • 31 end of structural gene
  • 51 end of structural gene
  • 51 end of template strand
  • 31 end of template strand
Q22 | In DNA replication the primer is
  • A Small deoxyribonucleotide polymer
  • A small ribonucleotide polymer
  • Helix destalilizing protein
  • Enzyme taking part in joining nucleotides of new strands
Q23 | Non - sense codons take part in
  • formation of unspecified aminoacids
  • Terminating message of gene controlled protein synthesis
  • Releasing t-RNA from polynucleotide chain
  • Conversion of sense DNA in to non-sense one
Q24 | select the correct sequence of following in DNA replication
  • single stranded binding proteins - Helicase - Topoisomerase - DNA polymerase
  • Helicase - single stranded binding proteins -Topoisomerase - DNA polymerase
  • Helicase - DNA polymerase - Topoisomerase - Single stranded binding proteins
  • Helicase - Topoisomerase - DNA polymerase - Single stranded binding proteins
Q25 | Which of the following enzymes can detect and correct the wrong inserted base during DNA replication ?
  • DNA polymerase - I
  • DNA polymerase - II
  • Primase
  • Ligase