McqMate
Chapters
| 1. |
Name the conjugated protein used as genetic material in living cells |
| A. | Glyco protein |
| B. | Nucleo protein |
| C. | Metallo protein |
| D. | Lip oprotein |
| Answer» B. Nucleo protein | |
| 2. |
Who supported Griffith effect by molecular explanation ? |
| A. | Hershay and chase |
| B. | Watson, crick Ninenberg |
| C. | Avery , Mc Carty and Macleod |
| D. | Griffith and Avery |
| Answer» C. Avery , Mc Carty and Macleod | |
| 3. |
Synthesis of nucleic acids always takes place in |
| A. | 31 - 51 dicectioon |
| B. | 51 - 31 direction |
| C. | Both ways |
| D. | in any direction |
| Answer» B. 51 - 31 direction | |
| 4. |
What is called Griffith effect ? |
| A. | DNA transcription |
| B. | RNA translation |
| C. | Bacterial transformation |
| D. | Bacterial transduction |
| Answer» C. Bacterial transformation | |
| 5. |
Genetic information is carried by the long chain molecules which are made up of |
| A. | Amino acids |
| B. | Nucleotides |
| C. | Chromosomes |
| D. | Enzymes |
| Answer» B. Nucleotides | |
| 6. |
By which bonds the purine & pyrimidine pairs of Complementary Strands of DNA held together? |
| A. | H - bonds |
| B. | O - bonds |
| C. | C - bonds |
| D. | N - bonds |
| Answer» A. H - bonds | |
| 7. |
State the nature of the 2 Strands of DNA duplex. |
| A. | identical & Complementary |
| B. | Anti parallel & complementary |
| C. | Disimilar & non - complementary |
| D. | Anti parallel & Non - complementary |
| Answer» B. Anti parallel & complementary | |
| 8. |
The code AUG stands for |
| A. | Glycine |
| B. | Methionine |
| C. | N-formyl methionine |
| D. | A lanine |
| Answer» B. Methionine | |
| 9. |
A Codon is made up of |
| A. | Single nucleotide |
| B. | two nucleotides |
| C. | three nucleotides |
| D. | Four nucleotides |
| Answer» C. three nucleotides | |
| 10. |
Nucleus of a cell is the site of Synthesis of |
| A. | DNA |
| B. | m - RNA |
| C. | t - RNA |
| D. | All |
| Answer» D. All | |
| 11. |
DNA replication requires |
| A. | DNA polymerase only |
| B. | DNA polymerase and ligase |
| C. | Ligase only |
| D. | RNA polymerase |
| Answer» B. DNA polymerase and ligase | |
| 12. |
The enzyme involved in transcription is |
| A. | RNA polymerase |
| B. | DNA polymerase I |
| C. | DNA polymerase II |
| D. | DNA polymerase III |
| Answer» A. RNA polymerase | |
| 13. |
Enzymes needed for formation of repliction fork |
| A. | RNA polymerase and DNA polymerase I |
| B. | Helicase and gyrase |
| C. | Hexokinase and aldolase |
| D. | Ligase and endo nuclease |
| Answer» B. Helicase and gyrase | |
| 14. |
Okazaki fragments are Synthesized on |
| A. | Leading strands of DNA only |
| B. | Lagging Strands of DNA only |
| C. | Leading and LaggingStrands |
| D. | Complementary DNA Strand |
| Answer» B. Lagging Strands of DNA only | |
| 15. |
Which of the following is used in DNA multiplication? |
| A. | RNA polymerase |
| B. | DNA endonuclease |
| C. | DNA exonuclease |
| D. | DNA Polymerase |
| Answer» D. DNA Polymerase | |
| 16. |
t - RNA attaches aminoacid at its |
| A. | 31 end |
| B. | 51 end |
| C. | Anticodon |
| D. | Loop |
| Answer» A. 31 end | |
| 17. |
DNA acts as a template for synthesis of |
| A. | RNA |
| B. | DNA |
| C. | Both ‘a’ and ‘b’ |
| D. | Protein |
| Answer» C. Both ‘a’ and ‘b’ | |
| 18. |
Antiparallel strand in DNA is due to |
| A. | Disulphide linkage |
| B. | Hydorgen bond |
| C. | Phosphodiester bond |
| D. | Ionic bond |
| Answer» C. Phosphodiester bond | |
| 19. |
Multiplication of DNA is called |
| A. | Translation |
| B. | Replication |
| C. | Transduction |
| D. | Transcription |
| Answer» B. Replication | |
| 20. |
Which is the smallest RNA ? |
| A. | r RNA |
| B. | m RNA |
| C. | t - RNA |
| D. | nuclear RNA |
| Answer» C. t - RNA | |
| 21. |
Genetic information are transfered from nucleus to cytoplasm of cell through |
| A. | DNA |
| B. | RNA |
| C. | Lysosomes |
| D. | Anticodon |
| Answer» B. RNA | |
| 22. |
The information from RNA to DNA are transfered by which process |
| A. | Replication |
| B. | Transcription |
| C. | Translation |
| D. | Reverse transcription |
| Answer» D. Reverse transcription | |
| 23. |
Which statement is correct ?
|
| A. | A,B,C,D,E |
| B. | A, B, D |
| C. | A., C, D |
| D. | A, C, D, E |
| Answer» D. A, C, D, E | |
| 24. |
DNA molecule has uniform diameter due to ? |
| A. | Double stranded |
| B. | Presence of phosphate |
| C. | Specific base pairing between purine and pyrimidine |
| D. | Specific base pairing between purine and purine |
| Answer» C. Specific base pairing between purine and pyrimidine | |
| 25. |
In a transcription unit promotor is said to be located towards |
| A. | 31 end of structural gene |
| B. | 51 end of structural gene |
| C. | 51 end of template strand |
| D. | 31 end of template strand |
| Answer» D. 31 end of template strand | |
| 26. |
In DNA replication the primer is |
| A. | A Small deoxyribonucleotide polymer |
| B. | A small ribonucleotide polymer |
| C. | Helix destalilizing protein |
| D. | Enzyme taking part in joining nucleotides of new strands |
| Answer» B. A small ribonucleotide polymer | |
| 27. |
Non - sense codons take part in |
| A. | formation of unspecified aminoacids |
| B. | Terminating message of gene controlled protein synthesis |
| C. | Releasing t-RNA from polynucleotide chain |
| D. | Conversion of sense DNA in to non-sense one |
| Answer» B. Terminating message of gene controlled protein synthesis | |
| 28. |
select the correct sequence of following in DNA replication |
| A. | single stranded binding proteins - Helicase - Topoisomerase - DNA polymerase |
| B. | Helicase - single stranded binding proteins -Topoisomerase - DNA polymerase |
| C. | Helicase - DNA polymerase - Topoisomerase - Single stranded binding proteins |
| D. | Helicase - Topoisomerase - DNA polymerase - Single stranded binding proteins |
| Answer» B. Helicase - single stranded binding proteins -Topoisomerase - DNA polymerase | |
| 29. |
Which of the following enzymes can detect and correct the wrong inserted base during DNA replication ? |
| A. | DNA polymerase - I |
| B. | DNA polymerase - II |
| C. | Primase |
| D. | Ligase |
| Answer» A. DNA polymerase - I | |
| 30. |
Which one is a ribozyme ? |
| A. | Helicase |
| B. | Ribonuclease - P |
| C. | Peptidyl transferase |
| D. | Both (B) & (C) |
| Answer» D. Both (B) & (C) | |
| 31. |
Which of the following pairs is not correctly matched ? |
| A. | Recombinant DNA - DNA forming by union of segments of DNA from diffrent Sources |
| B. | Purines - Nitrogenous bases Cytosine , thymine and Uracil |
| C. | ATP - The principal energy carrying compound inthe cell |
| D. | r-RNA - RNA molecules found in ribosomes |
| Answer» B. Purines - Nitrogenous bases Cytosine , thymine and Uracil | |
| 32. |
Which one of the following pairs is correctly matched ? |
| A. | Ribosomal RNA - Carries amino acids to the site of protein synthesis |
| B. | Transcription - Process by which protein in synthesized |
| C. | Translation - Process by which m RNA carries the information from nucleus to ribosomes |
| D. | Anticodon - Site of t-RNA that binds to the m-RNA |
| Answer» D. Anticodon - Site of t-RNA that binds to the m-RNA | |
| 33. |
Which is not the step of translation ? |
| A. | Initiation |
| B. | Replication |
| C. | Elongation |
| D. | Termination |
| Answer» B. Replication | |
| 34. |
The enzyme amino acyl t-RNA-synthetase facilitates. |
| A. | Joining two neighbouring amino acids on ribosomes |
| B. | A doption of amino acids by a t-RNA molecule |
| C. | Insertion of amino acyl t-RNA into the ribosome sites |
| D. | Transfer of amino acyl t-RNA from the ribosomal ‘A’ site to ‘P’ site |
| Answer» B. A doption of amino acids by a t-RNA molecule | |
| 35. |
state the anticodon of initiation codon of protein synthesis |
| A. | UAC |
| B. | UUU |
| C. | CAU |
| D. | AUG |
| Answer» A. UAC | |
| 36. |
Which is the energy source for the process of elongation ? |
| A. | ATP |
| B. | GTP |
| C. | Creatine-PO4 |
| D. | All the above |
| Answer» B. GTP | |
| 37. |
What does a gene consist of ? |
| A. | Promoter |
| B. | Initiation site & termination site |
| C. | coding sequence |
| D. | All the above |
| Answer» D. All the above | |
| 38. |
Name the enzymes needed for lactose Catabolism in E.coli ? |
| A. | β - galactosidase, permease transacetylase |
| B. | β - galactosidasee Lactase, transacetylase |
| C. | β - galactosidase, lactase, permease |
| D. | Lactase, permease, transacetylase |
| Answer» A. β - galactosidase, permease transacetylase | |
| 39. |
What does operon contain ? |
| A. | Regulator gene + promotor gene |
| B. | Operator gene + structural gene |
| C. | Regulator gene + promotor gene structural gene |
| D. | Regulator gene + promotor gene + operator gene + structural gene |
| Answer» D. Regulator gene + promotor gene + operator gene + structural gene | |
| 40. |
Select correct match with respect to lac-operon model ? |
| A. | Active represser + inducer Inactive repressor |
| B. | Active repressor + corepressor Inactive repressor |
| C. | Inactive repressor + inducer Active repressor |
| D. | Inactive repressor + corepressor Active repressor |
| Answer» A. Active represser + inducer Inactive repressor | |
| 41. |
In relation of lac operon in E-coli , Which protein is not regulated by the repressor ? |
| A. | Tryptophan |
| B. | galactosidase |
| C. | Lactose permease |
| D. | Transacetylase |
| Answer» A. Tryptophan | |
| 42. |
Which is not correct regarding the activity of helicase during DNA replication ? |
| A. | Cuts hydrogen bomds |
| B. | Requires ATP |
| C. | separates DNA strands |
| D. | Stabilizes single strands |
| Answer» C. separates DNA strands | |
| 43. |
Which of the following enzyme is not produced by E. coli during lactose catabolism ? |
| A. | β - galactosidase |
| B. | Thioglactoside translacetylase |
| C. | Lactose dehydrogenase |
| D. | Lactose permease |
| Answer» C. Lactose dehydrogenase | |
| 44. |
Which is the incorrect statement regarding HGP ? |
| A. | HGP is an Indian scientific research project |
| B. | In 1990, the Project was initiated |
| C. | A working draft of the genome was announced in 2000 |
| D. | In February 2001, the analysis of the working draft was published |
| Answer» A. HGP is an Indian scientific research project | |
| 45. |
Humans have approximately _____ times more genes than E.coli |
| A. | 8 |
| B. | 15 |
| C. | 100 |
| D. | 50 |
| Answer» D. 50 | |
| 46. |
Which of the following is not according to the chargoff’s rule ? |
| A. | A = T |
| B. | C = G |
| C. | A + G = T + C |
| D. | A + T / G + C =1 |
| Answer» D. A + T / G + C =1 | |
| 47. |
Select the correct answer / answers from the following
|
| A. | 1, 2, 3 and 4, are corrent |
| B. | 1 and 2 are correct, 3 and 4 are false |
| C. | 1 and 3 are correct, 2 and 4 false |
| D. | 1, 2, 3 are correct, 4 is false |
| Answer» C. 1 and 3 are correct, 2 and 4 false | |
| 48. |
DNA replication in eukaryotes is |
| A. | Unidirectional with many origin |
| B. | Bidirectional with many origin |
| C. | Unidirectional with single origin |
| D. | Bidirectional with single origin |
| Answer» B. Bidirectional with many origin | |
| 49. |
Aminoacids lysine, serine and arginine are coded by how many codons ? |
| A. | 6, 4, and 3 respectively |
| B. | 4, 2 and 2 respectively |
| C. | 6 codons |
| D. | 4 codons |
| Answer» C. 6 codons | |
| 50. |
Which of the following amino acid is coded by 3 codons ? |
| A. | serine |
| B. | Proline |
| C. | Tryptophan |
| D. | Isoleucine |
| Answer» D. Isoleucine | |
| 51. |
How many nucleotides make one okazaki segment in eukaryotes ? |
| A. | 1000-1500 |
| B. | 100-200 |
| C. | 5000 |
| D. | Not fixed |
| Answer» A. 1000-1500 | |
| 52. |
Which of the following enzymes help in the process of formation of phosphodiester bond during reverse transcription ? |
| A. | DNA - dependant RNA polymerase |
| B. | DNA dependant DNA polymerase |
| C. | RNA - dependant RNA polymerase |
| D. | RNA - dependant DNA polymerase |
| Answer» D. RNA - dependant DNA polymerase | |
| 53. |
The two strands of a DNA molecule are separted and one of them is analysed for its A + T / G + C ratio, This is found to be 0.2 What is the A + T / G + C ratio of the other strand |
| A. | 0.02 |
| B. | 0.08 |
| C. | 0.8 |
| D. | 0.2 |
| Answer» D. 0.2 | |
| 54. |
DNA replication in lagging strand of most of the eukaryotic organis ms is |
| A. | conservative and continuous |
| B. | semi conservative but discontinuous |
| C. | conservative and semi - discontinuous |
| D. | semi conservative but continuous |
| Answer» B. semi conservative but discontinuous | |
| 55. |
How many bases consist in an average gene ? |
| A. | 3, 00, 000 |
| B. | 3000 |
| C. | 4, 00, 000 |
| D. | 4000 |
| Answer» B. 3000 | |
| 56. |
Match the following using salient features of Human genome project A B
|
| A. | (P - iv) (Q - iii) ( R - ii) ( S - i) |
| B. | ( P - iv) (Q - ii) (R - iii) (S - i) |
| C. | (P - iv) (Q - i) (R - ii) (S - iii) |
| D. | (P - i) (Q - iii) (R - iv) (S - ii) |
| Answer» A. (P - iv) (Q - iii) ( R - ii) ( S - i) | |
| 57. |
State the use of moleculer medicine ? |
| A. | Improves diagnosis of diseases |
| B. | Used as gene theraphy |
| C. | Used to understand several diseass like Alzheimer’s Parkinsons diseases etc., |
| D. | All the above |
| Answer» D. All the above | |
| 58. |
Among the following which is used for separation of DNA fragments ? |
| A. | centifugation |
| B. | Cell fractionation |
| C. | Cell homogenation |
| D. | Electrophoresis |
| Answer» D. Electrophoresis | |
| 59. |
In Which of the following DNA not directly involved ? |
| A. | Repication |
| B. | Transcription |
| C. | Translation |
| D. | Transformation |
| Answer» C. Translation | |
| 60. |
Transcription begins when one of the following enzymes binds to promotor site. |
| A. | DNA polymerase |
| B. | RNA polymerase |
| C. | helicase |
| D. | Gyrase |
| Answer» B. RNA polymerase | |
| 61. |
What dose A & B represent ? |
| A. | Grycase , Helicase |
| B. | Double Stranded Protein, Helicase |
| C. | Helicase, Single strand binding protein |
| D. | Topoisomerase Helicase |
| Answer» C. Helicase, Single strand binding protein | |
| 62. |
State the process and mention the labelled protion. |
| A. | Process of Translation - X-RNA Polymerase- Y-DNA Template- Z-m RNA Transcript |
| B. | process of Transcription - X-RNA Polymerase- Y-DNA Template- Z- RNA Transcript |
| C. | process of Translocation - X-DNA polymerase- Y- Template- Z- Transcript |
| D. | Process of Transformation - X - DNA polymerase- Y - RNA template- Z - RNA transcript |
| Answer» B. process of Transcription - X-RNA Polymerase- Y-DNA Template- Z- RNA Transcript | |
| 63. |
What do P, Q, R and S regions of t RNA ? |
| A. | P - Anticodon loop |
| B. | P. D LoopQ - Variable loop Q - T ψ c loopR - T ψ c loop R - Variable loopS - D Loop S - Anticodon loop |
| C. | P - T ψ c loop |
| D. | P - Anticodon LoopQ - D loop Q - T ψ c loop R - Anticodon loop R - D loop S - Variable loop S - Variable loop |
| Answer» A. P - Anticodon loop | |
| 64. |
Which state is represent by the above model |
| A. | Repressed state of lac operon |
| B. | Inactive state of Lac operon |
| C. | Active state of Lac operon |
| D. | Induced state of Lac operon |
| Answer» A. Repressed state of lac operon | |
| 65. |
What does X replesent in the above diagram |
| A. | Released polypeptide chain |
| B. | Released 3D protein molecule |
| C. | Released secondary protein |
| D. | Released tertiary protein |
| Answer» A. Released polypeptide chain | |
| 66. |
What does ‘X’ represent |
| A. | gene |
| B. | segment of DNA |
| C. | seqment of DNA coding for specific protein |
| D. | Both A & C |
| Answer» D. Both A & C | |
| 67. |
Write the codon for the anticodon on the t - RNA |
| A. | AGU |
| B. | UGU |
| C. | UGA |
| D. | ACU |
| Answer» A. AGU | |
| 68. |
In the genetic code dictionary how many codons are used to code for all the 20 essential amino-acids? (AIPMT - 2003) |
| A. | 20 |
| B. | 64 |
| C. | 61 |
| D. | 60 |
| Answer» B. 64 | |
| 69. |
What would happen if in a gene encoding polypeptide of 50 aminoacids 25th codon (UAU) is mutated to UAA ? (AIPMT - 2003) |
| A. | A Polypeptide of 24 aminoacids will be formed |
| B. | Two polypeptides of 24 and 25 aminoacids will be formed |
| C. | A polypeptide of 49 aminoacids will be formed |
| D. | A polypeptide of 25 aminoacids will be formed |
| Answer» A. A Polypeptide of 24 aminoacids will be formed | |
| 70. |
Which one of the following triplet codes, is correctly matched with its specificity for an aminoacid in protein synthesis or as ‘start’ or ‘stop’ codon ? |
| A. | UCG - start |
| B. | UUU - stop |
| C. | UGU - Leucine |
| D. | UAC - Tyrosine |
| Answer» D. UAC - Tyrosine | |
| 71. |
What does “Lac” refer to in what we call the lac operon ? (AIPMT - 2003) |
| A. | Lactose |
| B. | Lactase |
| C. | Lac insect |
| D. | The number 1,00,000 |
| Answer» A. Lactose | |
| 72. |
The following ratio is generally constant for a given species (AIPMT - 2004) |
| A. | A + G / C + T |
| B. | T + C / G + A |
| C. | G + C / A + T |
| D. | A + C / T + G |
| Answer» C. G + C / A + T | |
| 73. |
During transcription if the nucleotide sequence of the DNA strand that is being coded is ATACG then the nucleotide sequence in the m RNA would be (AIPMT - 2004) |
| A. | TATGC |
| B. | T C T G G |
| C. | U A U G C |
| D. | U A T G C |
| Answer» C. U A U G C | |
| 74. |
Which one of the following makes use of RNA template to synthesize DNA (AIPMT - 2005) |
| A. | DNA polymerase |
| B. | RNA polymerase |
| C. | Reverse transcriptase |
| D. | DNA dependant RNA polymerase |
| Answer» C. Reverse transcriptase | |
| 75. |
Protein synthesis is an animal cell occurs (AIPMT - 2005) |
| A. | only on the ribosomes present in cytosol |
| B. | only on ribosomes attached to the nuclear envelope and endoplasmic reticulum |
| C. | On ribosomes present in the nucleolus as well as in cytoplasm |
| D. | on ribosomes present in cytoplasm as well as in mitochondria |
| Answer» D. on ribosomes present in cytoplasm as well as in mitochondria | |
| 76. |
E coli cells with a mutant z gene of the lac operon cannot grow in medium containing only lactose as the source of energy because (AIPMT - 2005) |
| A. | the lac operon is constitutively active in these cells |
| B. | they cannot synthesize functional beta galactosidase |
| C. | in the presence of glucose E Coli cell do not utilize lactose |
| D. | they cannot transport lactose from the medium into the cell |
| Answer» B. they cannot synthesize functional beta galactosidase | |
| 77. |
Aminoacid Sequence in protein synthesis is decided by the sequence of (AIPMT - 2006) |
| A. | r RNA |
| B. | t- RNA |
| C. | m RNA |
| D. | c DNA |
| Answer» C. m RNA | |
| 78. |
Antiparallel strands of a DNA molecule means that (AIPMT - 2006) |
| A. | One strand turns clockwise |
| B. | One strand turns anticlockwise |
| C. | The phosphate groups of two DNA strands , at their ends share the same position |
| D. | The phosphate groups at the start of two DNA strands are is opposite position (Pole). |
| Answer» D. The phosphate groups at the start of two DNA strands are is opposite position (Pole). | |
| 79. |
Polysome is formed by (AIPMT - 2008) |
| A. | a ribosome with several subunits |
| B. | ribosomes attached to each other in a linear arrangement |
| C. | several ribosomes attached to a single m RNA |
| D. | many ribosomes attached to a strand of endoplasmic reticulum |
| Answer» C. several ribosomes attached to a single m RNA | |
| 80. |
Whose experiments cracked the DNA and discovered unequivocally that a genetic code is a “triplet” (AIPMT - 2009) |
| A. | Hershey and chase |
| B. | Morgan and sturtevant |
| C. | Beadle and Tatum |
| D. | Nirenberg and Mathai |
| Answer» D. Nirenberg and Mathai | |
| 81. |
Select the two correct statement out of the four statement given below about “ Lac opern”(AIPMT-2010)
|
| A. | ii and iii |
| B. | i and iii |
| C. | ii and iv |
| D. | i and ii |
| Answer» C. ii and iv | |
| 82. |
Which one of the following does not follow the central dogma of molecular biology ? (AIPMT - 2010) |
| A. | Pea |
| B. | Mucor |
| C. | Chlamydomonas |
| D. | HIV |
| Answer» D. HIV | |
| 83. |
The lac opern consists of (AIPMT - 2010) |
| A. | four regulatory genes only |
| B. | One regulatory gene and three structural genes |
| C. | Two regulatory genes and three structural genes |
| D. | three regulatory genes and three structural genes |
| Answer» C. Two regulatory genes and three structural genes | |
| 84. |
The 31 - 51Phosphodiester linkages inside a potynucleotide chain serve to join AIPMT - 2010) |
| A. | One DNA strand with the other DNA strand |
| B. | One nucleoside with another nucleoside |
| C. | One nucleotide with another nucleotide |
| D. | One nitrogen base with pentose sugar |
| Answer» C. One nucleotide with another nucleotide | |
| 85. |
Ribosomal RNA is actively synthesized by |
| A. | Lysosomes |
| B. | nucleolus |
| C. | nucleoplasm |
| D. | ribosomes |
| Answer» B. nucleolus | |
| 86. |
If one strand of DNA has the nitrogenous base sequence as ATCTG, What would be the complementary RNA strand Sequence (AIPMT - 2012) |
| A. | TTAGU |
| B. | UAGAC |
| C. | AACTG |
| D. | ATCGU |
| Answer» B. UAGAC | |
| 87. |
Semiconservative DNA replication using 15 N was demonstrated by (AIIMS -1994) |
| A. | Meselson |
| B. | Taylor |
| C. | Meselson and stahl |
| D. | Hershey and chase |
| Answer» C. Meselson and stahl | |
| 88. |
In operan concept, the operator gene combines with (AIIMS -1986) |
| A. | Regulator protein to switch off structural gene transcription |
| B. | Regulator protein to switch on structural gene transcription |
| C. | Inducer to switch off structural gene transcription |
| D. | Regulator gene to switch off structural gene transcription |
| Answer» A. Regulator protein to switch off structural gene transcription | |
| 89. |
Termination of polypeptide chain is brought about by |
| A. | UUG , UAG and UCG |
| B. | UAA , UAG and UGA |
| C. | UUG , UGC and UCA |
| D. | UCG , GCG and ACC |
| Answer» B. UAA , UAG and UGA | |
| 90. |
RNA that picks up specific aminoacid from amino acid pool of cytoplasm to carry it to ribosome during protein synthesis is |
| A. | t RNA |
| B. | m RNA |
| C. | r RNA |
| D. | g RNA |
| Answer» A. t RNA | |
| 91. |
Correct sequenceof code transfer during polypeptide formation is (AIIMS -1999) |
| A. | DNA , mRNA , t RNA and amino acids |
| B. | DNA , t RNA , r RNA and m RNA |
| C. | m RNA , t RNA , DNA and amino acids |
| D. | r RNA , DNA ,m RNA and t RNA |
| Answer» A. DNA , mRNA , t RNA and amino acids | |
| 92. |
Best method to determine paternity is |
| A. | Protein analysis |
| B. | chromosome counting |
| C. | gene counting |
| D. | DNA finger printing |
| Answer» D. DNA finger printing | |
| 93. |
DNA is copied from m-RNA molecule with help of |
| A. | Restriction enzyme |
| B. | Reverse transcriptase |
| C. | DNA polymerase |
| D. | Adenosine deaminase |
| Answer» B. Reverse transcriptase | |
| 94. |
Nucleotide arrangement in DNA can be seen by |
| A. | X - ray crystallography |
| B. | Electron microscope |
| C. | Ultra centrifuge |
| D. | Light microscope |
| Answer» A. X - ray crystallography | |
| 95. |
Pneumococcus experiment proved that (AFMC - 1993) |
| A. | Bacteria do not reproduce asexuallly |
| B. | Bacteria undergo binary fission |
| C. | DNA is genetic material |
| D. | RNA may sometimes control a production of DNA and protein |
| Answer» C. DNA is genetic material | |
| 96. |
A DNA nucletotide chain has A G C T T C G A sequence The nucleotide sequence of other chain would be |
| A. | T C G A A G C T |
| B. | G C T A A G C T (AFMC - 1993) |
| C. | T A G C A T A T |
| D. | G A T C C T A G |
| Answer» A. T C G A A G C T | |
| 97. |
A functional unit in synthesis of protein is (MPPMT - 1994) |
| A. | Lysosome |
| B. | Peroxisome |
| C. | Polysome |
| D. | Dictyosome |
| Answer» C. Polysome | |
| 98. |
VNTR is employed for (AMU - 2002) |
| A. | Protoplasmic culture |
| B. | DNA finger printing |
| C. | Regulation of plant growth hormones |
| D. | Enhancing photosynthesis in desert plant |
| Answer» B. DNA finger printing | |
| 99. |
Out of 64 codons 61 code for 20 types of aminoacids It is due to (CBSE - 2002) |
| A. | Overlapping genes |
| B. | Degeneracy of genetic code |
| C. | Wobbling of codons |
| D. | Universality of codons |
| Answer» B. Degeneracy of genetic code | |
| 100. |
Okazaki fragments are joined by enzyme (Kerala 2005) |
| A. | DNA helix |
| B. | DNA ligase |
| C. | DNA polymerase II |
| D. | RNA polymerase II |
| Answer» B. DNA ligase | |
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