Q.1
Identify the correct order of organization of genetic material from largest to smallest : [ ReAIPMT 2015]
  • a) Chromosome, genome, nucleotide, gene
  • b) Chromosome, gene, genome, nucleotide
  • c) Genome, chromosomes, nucleotide, gene
  • d) Genome, chromosome, gene, nucleotide
Q.2
Eukaryotic genome differs from prokaryotic genome in ... ... [ CBSE 1998 ]
  • a) DNA is circular and single-stranded in prokaryotes
  • b) Intervening sequences are present in eukaryotic DNA
  • c) DNA is complex with histone in prokaryotes
  • d) DNA is organized into operon in eukaryotes
Q.3
Which one carries genetic message to ribosomes? [ Odisha 2000 ]
  • a) tRNA
  • b) rRNA
  • c) mRNA
  • d) HnRNA
Q.4
Radioactive fall out is more harmful to future generations than children now living because .... .... [ PbPMT 2005 ]
  • a) Infants are more susceptible to radiation
  • b) Susceptibility to radiation increases with age
  • c) Mutated genes are frequently recessive
  • d) Contamination of milk supply is non-cumulative
Q.5
Types of RNA polymerases operative in eukaryotes are .... ... [CBSE 2001 ]
  • a) Four
  • b) Three
  • c) Two
  • d) One
Q.6
Which one of the following is wrongly matched? ….[AIPMT 2014]
  • a) Repressor protein-Binds to operator to stop enzyme synthesis.
  • b) Operon–Structural genes, operator and promoter.
  • c) Transcription–Writing information from DNA to t-RNA.
  • d) Translation-Using information in m-RNA to make protein.
Q.7
Select the correct option : Direction of Direction of reading RNA synthesis of the template DNA …[AIPMT 2014]
  • a) 5'----3' 5'----3'
  • b) 3'----5' 3'----5'
  • c) 5'----3' 3'----5'
  • d) 3'----5' 5'----3'
Q.8
Transformation was discovered by:
  • a) Griffith
  • b) Watson and Crick
  • c) Meselson and Stahl
  • d) Hershey and Chase
Q.9
Gene regulation governing lactose operon of E.coli that involves the lac I gene product is : …[AIPMT 2015]
  • a) Feedback inhibition because excess of galactosidase can switch off transcription
  • b) Positive and inducible because it can be induced by lactose
  • c) negative and inducible because repressor protein prevents transcription
  • d) negative and repressible because repressor protein prevents transcription
Q.10
In sea urchin DNA, which is double stranded, 17 % of the bases were shown to be cytosine. The percentages of the other three bases expected to be present in this DNA are : …[AIPMT 2015]
  • a) G 8.5%, A 50%, T 24.5%
  • b) G 34%, A 24.5%, T 24.5%
  • c) G 17%, A 16.5%, T 32.5%
  • d) G 17%, A 33%, T 33%
Q.11
Which of the following is required as inducer(s) for the expression of Lac operon ? …[AIPMT-2016]
  • a) Glucose
  • b) Galactose
  • c) Lactose
  • d) Lactose and galactose
Q.12
A complex of ribosomes attached to a single strand of RNA is known as :- …[AIPMT-2016]
  • a) Polysome
  • b) Polymer
  • c) Polypeptide
  • d) Okazaki fragment
Q.13
Which of the following is not required for any of the techniques of DNA fingerprinting available at present ? …[AIPMT-2016]
  • a) Polymerase chain reaction
  • b) Zinc finger analysis
  • c) Restriction enzymes
  • d) DNA–DNA hybridization
Q.14
Which of the following is a restriction endonuclease? …[AIPMT-2016]
  • a) Hind II
  • b) Protease
  • c) DNase I
  • d) RNase
Q.15
Which one of the following is the starter codon ? …[AIPMT-2016]
  • a) AUG
  • b) UGA
  • c) UAA
  • d) UAG
Q.16
The colonies of recombinant bacteria appear white in contrast to blue colonies of non-recombinant bacteria because of …[NEET 2013]
  • a) Non-recombinant bacteria containing beta galactosidase
  • b) Insertional inactivation of alpha-galactosidase in non-recombinant bacteria
  • c) Insertional inactivation of alpha-galactosidase in recombinant bacteria
  • d) Inactivation of glycosidase enzyme in recombinant bacteria
Q.17
Which enzyme/s will be produced in a cell in which there is a nonsense mutation in the lac Y gene? …[NEET 2013] Explanation provided please clikc on
  • a) β-galactosidase
  • b) Lactose permease
  • c) Transacetylase
  • d) Lactose permease and transacetylase
Q.18
Taylor conducted the experiment to prove semi-conservative mode of chromosome replication on : …[NEET 2016]
  • a) Drosophila melanogaster
  • b) E. coli
  • c) Vinca rosea
  • d) Vicia faba
Q.19
The mechanism that causes a gene to move from one linkage group to another is called : …[NEET 2016]
  • a) Translocation
  • b) Crossing-over
  • c) Inversion
  • d) Duplication
Q.20
The equivalent of a structural gene is : …[NEET 2016]
  • a) Operon
  • b) Recon
  • c) Muton
  • d) Cistron
Q.21
A molecule that can act as a genetic material must fulfill the traits given below, except :- …[NEET 2016]
  • a) It should be unstable structurally and chemically
  • b) It should provide the scope for slow changes that are required for evolution
  • c) It should be able to express itself in the form of 'Mendelian characters'
  • d) It should be able to generate its replica
Q.22
DNA-dependent RNA polymerase catalyzes transcription on one strand of the DNA which is called the :- …[NEET 2016]
  • a) Alpha strand
  • b) Anti-strand
  • c) Template strand
  • d) Coding strand
Q.23
The final proof for DNA as the genetic material came from the experiments of ….[NEET- 2017]
  • a) Griffith
  • b) Hershey and Chase
  • c) Avery, Mcleod and McCarty
  • d) Hargobind Khorana
Q.24
During DNA replication, Okazaki fragments are used to elongate ….[NEET- 2017]
  • a) The leading strand towards replication fork
  • b) The lagging strand towards replication fork
  • c) The leading strand away from replication fork
  • d) The lagging strand away from the replication fork
Q.25
Spliceosome are not found in cells of….[NEET- 2017]
  • a) Plants
  • b) Fungi
  • c) Animals
  • d) Bacteria
Q.26
The association of histone H1 with a nucleosome indicates: ….[NEET- 2017]
  • a) Transcription is occurring
  • b) DNA replication is occurring
  • c) The DNA is condensed into a Chromatin Fiber
  • d) The DNA double helix is exposed
Q.27
DNA fragments are ….[NEET- 2017]
  • a) Positively charged
  • b) Negatively charged
  • c) Neutral
  • d) Either positively or negatively charged depending on their size
Q.28
If there are 999 bases in an RNA that codes for a protein with 333 amino acids, and the base at position 901 is deleted such that the length of the RNA becomes 998 bases, how many codons will be altered? ….[NEET- 2017]
  • a) 1
  • b) 11
  • c) 33
  • d) 333
Q.29
Which of the following RNAs should be most abundant in animal cell? ….[NEET- 2017]
  • a) r-RNA
  • b) t-RNA
  • c) m-RNA
  • d) mi-RNA
Q.30
The term "linkage" was coined by : [ ReAIPMT 2015]
  • a) W.Sutton
  • b) T.H. Morgan
  • c) T.Boveri
  • d) G.Mendel
0 h : 0 m : 1 s