Identify the correct order of organization of genetic material from largest to smallest : [ ReAIPMT 2015]
26%
a) Chromosome, genome, nucleotide, gene
11%
b) Chromosome, gene, genome, nucleotide
30%
c) Genome, chromosomes, nucleotide, gene
33%
d) Genome, chromosome, gene, nucleotide
Q.2.
Eukaryotic genome differs from prokaryotic genome in ... ... [ CBSE 1998 ]
43%
a) DNA is circular and single-stranded in prokaryotes
35%
b) Intervening sequences are present in eukaryotic DNA
9%
c) DNA is complex with histone in prokaryotes
13%
d) DNA is organized into operon in eukaryotes
Q.3.
Which one carries genetic message to ribosomes? [ Odisha 2000 ]
14%
a) tRNA
32%
b) rRNA
55%
c) mRNA
0%
d) HnRNA
Q.4.
Radioactive fall out is more harmful to future generations than children now living because .... .... [ PbPMT 2005 ]
25%
a) Infants are more susceptible to radiation
20%
b) Susceptibility to radiation increases with age
45%
c) Mutated genes are frequently recessive
10%
d) Contamination of milk supply is non-cumulative
Q.5.
Types of RNA polymerases operative in eukaryotes are .... ... [CBSE 2001 ]
14%
a) Four
38%
b) Three
43%
c) Two
5%
d) One
Q.6.
Which one of the following is wrongly matched? ….[AIPMT 2014]
26%
a) Repressor protein-Binds to operator to stop enzyme synthesis.
5%
b) Operon–Structural genes, operator and promoter.
63%
c) Transcription–Writing information from DNA to t-RNA.
5%
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]
20%
a) 5'----3' 5'----3'
5%
b) 3'----5' 3'----5'
55%
c) 5'----3' 3'----5'
20%
d) 3'----5' 5'----3'
Q.8.
Transformation was discovered by:
50%
a) Griffith
5%
b) Watson and Crick
15%
c) Meselson and Stahl
30%
d) Hershey and Chase
Q.9.
Gene regulation governing lactose operon of E.coli that involves the lac I gene product is : …[AIPMT 2015]
20%
a) Feedback inhibition because excess of galactosidase can switch off transcription
20%
b) Positive and inducible because it can be induced by lactose
40%
c) negative and inducible because repressor protein prevents transcription
20%
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]
17%
a) G 8.5%, A 50%, T 24.5%
17%
b) G 34%, A 24.5%, T 24.5%
17%
c) G 17%, A 16.5%, T 32.5%
50%
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]
5%
a) Glucose
10%
b) Galactose
50%
c) Lactose
35%
d) Lactose and galactose
Q.12.
A complex of ribosomes attached to a single strand of RNA is known as :- …[AIPMT-2016]
43%
a) Polysome
19%
b) Polymer
10%
c) Polypeptide
29%
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]
42%
a) Polymerase chain reaction
32%
b) Zinc finger analysis
16%
c) Restriction enzymes
11%
d) DNA–DNA hybridization
Q.14.
Which of the following is a restriction endonuclease? …[AIPMT-2016]
57%
a) Hind II
24%
b) Protease
14%
c) DNase I
5%
d) RNase
Q.15.
Which one of the following is the starter codon ? …[AIPMT-2016]
67%
a) AUG
0%
b) UGA
14%
c) UAA
19%
d) UAG
Q.16.
The colonies of recombinant bacteria appear white in contrast to blue colonies of non-recombinant bacteria because of …[NEET 2013]
29%
a) Non-recombinant bacteria containing beta galactosidase
24%
b) Insertional inactivation of alpha-galactosidase in non-recombinant bacteria
29%
c) Insertional inactivation of alpha-galactosidase in recombinant bacteria
18%
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
15%
a) β-galactosidase
40%
b) Lactose permease
20%
c) Transacetylase
25%
d) Lactose permease and transacetylase
Q.18.
Taylor conducted the experiment to prove semi-conservative mode of chromosome replication on : …[NEET 2016]
42%
a) Drosophila melanogaster
16%
b) E. coli
11%
c) Vinca rosea
32%
d) Vicia faba
Q.19.
The mechanism that causes a gene to move from one linkage group to another is called : …[NEET 2016]
47%
a) Translocation
16%
b) Crossing-over
21%
c) Inversion
16%
d) Duplication
Q.20.
The equivalent of a structural gene is : …[NEET 2016]
37%
a) Operon
5%
b) Recon
11%
c) Muton
47%
d) Cistron
Q.21.
A molecule that can act as a genetic material must fulfill the traits given below, except :- …[NEET 2016]
35%
a) It should be unstable structurally and chemically
12%
b) It should provide the scope for slow changes that are required for evolution
41%
c) It should be able to express itself in the form of 'Mendelian characters'
12%
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]
22%
a) Alpha strand
6%
b) Anti-strand
33%
c) Template strand
39%
d) Coding strand
Q.23.
The final proof for DNA as the genetic material came from the experiments of ….[NEET- 2017]
21%
a) Griffith
42%
b) Hershey and Chase
26%
c) Avery, Mcleod and McCarty
11%
d) Hargobind Khorana
Q.24.
During DNA replication, Okazaki fragments are used to elongate ….[NEET- 2017]
24%
a) The leading strand towards replication fork
29%
b) The lagging strand towards replication fork
29%
c) The leading strand away from replication fork
18%
d) The lagging strand away from the replication fork
Q.25.
Spliceosome are not found in cells of….[NEET- 2017]
16%
a) Plants
26%
b) Fungi
16%
c) Animals
42%
d) Bacteria
Q.26.
The association of histone H1 with a nucleosome indicates: ….[NEET- 2017]
15%
a) Transcription is occurring
10%
b) DNA replication is occurring
40%
c) The DNA is condensed into a Chromatin Fiber
35%
d) The DNA double helix is exposed
Q.27.
DNA fragments are ….[NEET- 2017]
20%
a) Positively charged
50%
b) Negatively charged
10%
c) Neutral
20%
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]
18%
a) 1
24%
b) 11
41%
c) 33
18%
d) 333
Q.29.
Which of the following RNAs should be most abundant in animal cell? ….[NEET- 2017]
28%
a) r-RNA
28%
b) t-RNA
33%
c) m-RNA
11%
d) mi-RNA
Q.30.
The term "linkage" was coined by : [ ReAIPMT 2015]
0%
a) W.Sutton
83%
b) T.H. Morgan
6%
c) T.Boveri
11%
d) G.Mendel
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