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Free download in PDF Multiple Choice Questions and Answers on Molecular Basis of Inheritance for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams like NEET, AIIMS, JIPMER etc. These short solved questions or quizzes are provided by Gkseries./p>
(1)
The energy source for the elongation process is
[A]
Creatine-PO4
[B]
GTP
[C]
ATP
[D]
All of the above
(2)
The anticodon of initiation codon for protein synthesis is
[A]
UUU
[B]
AUG
[C]
UAC
[D]
CAU
(3)
In lac-operon, which protein is not regulated by the repressor?
[A]
Galactosidase
[B]
Lactose Permease
[C]
Tryptophan
[D]
Transacetylase
(4)
Which enzyme is not produced during lactose catabolism by E.coli?
[A]
𝜷-galactosidase
[B]
Lactose Permease
[C]
Thiogalactoside transacetylase
[D]
Lactose dehydrogenase
Answer: Female heterogamety
(5)
The eukaryotic replication of DNA is
[A]
Bidirectional with many origins
[B]
Unidirectional with many origins
[C]
Bidirectional with a single origin
[D]
Unidirectional with a single origin
Answer: Bidirectional with many origins
(6)
The amino acid coded by 3 codons is
[A]
Proline
[B]
Isoleucine
[C]
Tryptophan
[D]
Serine
(7)
Spliceosomes are absent in the cells of
[A]
Plants
[B]
Animals
[C]
Bacteria
[D]
None of the above
(8)
A molecule that acts as a genetic material must fulfil the following traits, except
[A]
It should be structurally and chemically unstable
[B]
It should have the ability to generate its replica
[C]
It should facilitate slow changes necessary for evolution
[D]
It should be able to express itself in the form of Mendelian characters
Answer: It should be structurally and chemically unstable
(9)
What will the amount of guanine in a DNA if the total amount of adenine and thiamine in the DNA is 45%?
[A]
45%
[B]
65%
[C]
27.5%
[D]
22.3%
(10)
The primary control of gene expression takes place at the level of
[A]
Translation
[B]
Replication
[C]
Transcription
[D]
None of these
(11)
The gene sequence that codes for proteins are
[A]
Exons
[B]
Introns
[C]
Intervening sequences
[D]
Control regions
(12)
The process of RNA splicing shows the dominance of
[A]
RNA world
[B]
DNA world
[C]
Microbial world
[D]
Protein world
(13)
In eukaryotes, RNA II facilitates transcription of
[A]
rRNA
[B]
mRNA
[C]
hnRNA
[D]
tRNA
(14)
Human Genome Project led to the development of
[A]
Biotechnology
[B]
Bioinformatics
[C]
Biosystematics
[D]
Bioengineering
(15)
Which non-radioactive isotope was used by Messelson and Stahl in their experiment?
[A]
P32
[B]
S35
[C]
N15
[D]
None of these
(16)
Histones are
[A]
Positively charged and basic amino acids
[B]
Positively charged and acidic proteins
[C]
Negatively charged and basic proteins
[D]
Absent in bacteria
Answer: Absent in bacteria
(17)
Which of the following statement is false about DNA?
[A]
Located in chromosomes
[B]
Carries genetic information from parent to offspring
[C]
Abundantly found in cytoplasm
[D]
There is a precise correlation between the amount of DNA and number of sets of chromosome per cell
Answer: Abundantly found in cytoplasm
(18)
Which of the following function of DNA is necessary for the purpose of evolution?
[A]
Replication
[B]
Transcription
[C]
Translation
[D]
Mutation
(19)
According to the phenotypic characters of pneumococcus considered in Griffith’s experiment of transformation, which of the following statements are correct?
i) Presence of slime layer
ii) Presence of capsule
iii) Absence of capsule
iv) Type of adhesion
v) Molecular makeup of capsule
[A]
i, ii, iii
[B]
ii, iii, iv
[C]
ii, iii, v
[D]
i, iv, v
(20)
Which of the following combination is a correct observation for the transformation experiment performed by Griffith?
[A]
Type IIIS (living) + mouse = dead
[B]
Type IIIS (heat killed) + mouse = dead
[C]
Type IIR (living) + mouse = dead
[D]
Type IIIS (heat killed) + type IIR (living) + mouse = living
Answer: Type IIIS (living) + mouse = dead
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