1:Peptide linkages are formed in between
(a) Nucleotides
(b) Amino acids
(c) Glucose molecules
(d) Sucrose
Answer:(b) Amino acids
2:The nucleic acid of polio viruses is
(a) DNA
(b) RNA – (+) type
(c) t-RNA
(d) m-RNA
Answer:(b) RNA – (+) type
3:Rabies virus is
(a) Nake RNA virus
(b) Naked DNA virus
(c) Enveloped RNA virus
(d) Enveloped DNA virus
Answer:(c) Enveloped RNA virus
4:Example for DNA virus:
(a) Polio virus
(b) Adenovirus
(c) Echo virus
(d) Potyvirus
Answer:(b) Adenovirus
5:In genetic engineering breaks in DNA are formed by enzymes known as
(a) Restriction enzymes
(b) Ligases
(c) Nucleases
(d) Hydrolases
Answer:(b) Ligases
6:DNA transfer from one bacterium to another through phages is termed as
(a) Transduction
(b) Induction
(c) Transfection
(d) Infection
Answer:(a) Transduction
7:Microorganisms usually make acetyl CO-A by oxidizing
(a) Acetic acid
(b) Pyruvic acid
(c) α-ketoglutaric acid
(d) Fumaric acid
Answer:(a) Acetic acid
8:The method of DNA replication proposed by Watson and Crick is
(a) Semi conservative
(b) Conservative
(c) Dispersive
(d) Rolling loop
Answer:(a) Semi conservative
9:The distance between each turn in the helical strand of DNA is
(a) 20 Ao
(b) 34 Ao
(c) 28 Ao
(d) 42 Ao
Answer:(b) 34 Ao
10:Self-replicating, small circular DNA molecules present in bacterial cell are known
(a) Plasmids
(b) Cosmids
(c) Plasmomeros
(d) Plastids
Answer:(a) Plasmids
11:Western blotting is the technique used in the determination of
(a) RNA
(b) DNA
(c) Proteins
(d) All of these
Answer:(b) DNA
12:m RNA synthesis from DNA is termed
(a) Transcription
(b) Transformation
(c) Translation
(d) Replication
Answer:(a) Transcription
13:Western blotting is a technique used in the determination of
(a) DNA
(b) RNA
(c) Protein
(d) Polysaccharides
Answer:(a) DNA
14:Building blocks of Nucleic acids are
(a) Amino acids
(b) Nucleosides
(c) Nucleotides
(d) Nucleo proteins
Answer:(c) Nucleotides
15:DNA fingerprinting is based on
(a) Repetitive sequences
(b) Unique sequences
(c) Amplified sequences
(d) Non-coding sequences
Answer:(b) Unique sequences
16:The enzyme required for DNA from RNA template:
(a) RNA polymerase
(b) Reverse transcriptase
(c) DNA polymerase
(d) Terminal transferase
Answer:(b) Reverse transcriptase
17:Double standard RNA is seen in
(a) Reo virus
(b) Rhabdo virus
(c) Parvo virus
(d) Retro virus
Answer:(a) Reo virus
18:Example for DNA viruses:
(a) Adeno virus
(b) Bacteriophage T1, T2, T3, T4 , T5, T6
(c) Papova virus
(d) Herpes virus and cauliflower mosaic
(e) All of the above
Answer:(e) All of the above
19:The following are the RNA viruses, except
(a) Reo viruses
(b) Retro viruses
(c) Bacteriophage Φ C
(d) Tmv and Bacteriophages Ms2, F2
(e) Dahlia mosaic virus and Bacteriophages Φ × 174, M12, M13
Answer:(e) Dahlia mosaic virus and Bacteriophages Φ × 174, M12, M13
20:The two strands of DNA are joined noncovalently by
(a) Ionic bonds
(b) Covalent bonds
(c) Hydrogen bonds between bases
(d) Polar charges
Answer:(c) Hydrogen bonds between bases
21:The bases Adenine and Thymine are paired with
(a) Double hydrogen bonds
(b) Single hydrogen bonds
(c) Triple hydrogen bonds
(d) Both b and c
Answer:(a) Double hydrogen bonds
22:The no. of hydrogen bonds existing between Guanine and Cytosine are
(a) 5
(b) 2
(c) 3
(d) None of the
Answer:(c) 3
23:The length of each coil in DNA strand is
(a) 15 Ao
(b) 34 Ao
(c) 30 Ao
(d) 5 Ao
Answer:(b) 34 Ao
24:Nucleic acids are highly charged polymers due to
(a) There is phosphodiester bond between 5’- hydroxyl of one ribose and 3’–hydroxyl of next ribose
(b) They have positive and negative ends
(c) Nucleotides are charged structures
(d) Nitrogenous bases are highly ionized compounds
Answer:(a) There is phosphodiester bond between 5’- hydroxyl of one ribose and 3’–hydroxyl of next ribose
25:The best studied example for specialized transduction is
(a) P1 phage
(b) P22 phage
(c) ë-phage
(d) Both a and c
Answer:(c) ë-phage
26:The diagrammatic representation of the total no. of genes in DNA is
(a) Genome
(b) Gene map
(c) Gene-structure
(d) Chromatin
Answer:(b) Gene map
27:During specialized transduction
(a) Large amount of DNA is transferred
(b) A few no. of genes are transferred
(c) Whole DNA is transferred
(d) None of these
Answer:(b) A few no. of genes are transferred
28:The cell donating DNA during transformation is
(a) Endogenate
(b) Exogenate
(c) Mesozygote
(d) Merosite
Answer:(b) Exogenate
29:Genetic information transfer DNA to RNA is called –
(a) Transcriptase
(b) Transduction
(c) Transformation
(d) Recombination
Answer:(a) Transcriptase
30:The gene transfer occurs by –
(a) Transformation
(b) Transduction
(c) Conjugation
(d) Cell fusion
Answer:(a) Transformation
