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Free download in PDF Gene its Nature Expression and Regulation Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(1)
The scientists involved in discovery of DNA as chemical basis of heredity were
[A]
Avery Mac Leod and Mc carty
[B]
Watson and Crick
[C]
Hershey and chase
[D]
Griffith and Avery
Answer: Avery Mac Leod and Mc carty
(2)
One turn of DNA possesses
[A]
10 base pairs
[B]
5 base pairs
[C]
1 base pairs
[D]
2 base pairs
(3)
Initiation codon for protein synthesis are
[A]
GUG and AUG
[B]
AUG and GUA
[C]
UUU and GGG
[D]
AAU and UAA
(4)
New strendformation on a DNA template can be initiated only by
[A]
RNA primer
[B]
DNA primer
[C]
DNA polymerase I
[D]
DNA polymerase III
(5)
GUG specifies amino acid valine. However when functioning as initiation codon it specifies
[A]
Methionine
[B]
Valine
[C]
Lysine
[D]
Isoleucine
(6)
A bacterium grown over medium having radioactive35S incorporates radioactivity in
[A]
RNA
[B]
Carbohydrates
[C]
Proteins
[D]
DNA
(7)
In eukaryotes mRNA is synthesized with aid of
[A]
RNA polymerase II
[B]
RNA polymerase III
[C]
Reverse transcriptase
[D]
RNA Polymers I
Answer: RNA polymerase II
(8)
Codon specifies the same amino acid in brassica and homeo because codons are
[A]
Nonambiguous
[B]
Commaless
[C]
Non overlapping
[D]
Universal
(9)
Experimental material used by hershey and chase for providing that DNA controls heridity was
[A]
T2 phage
[B]
TMV
[C]
Diplococcus pneumoniae
[D]
Salmonella typhimurium
(10)
Bacterium in which transformation was first studied in
[A]
Streptococcus pneumoniae
[B]
Streptococcus aureus
[C]
Salmonella typhimurium
[D]
Escherichia coli
Answer: Streptococcus pneumoniae
(11)
Protein cannot be a genetic material because it is not
[A]
Able to replicate
[B]
Having diversity and specificity
[C]
Large molecule
[D]
Ubiquitous
Answer: Able to replicate
(12)
RNA which is present in minimum amount in a cell is
[A]
mRNA
[B]
rRNA
[C]
tRNA
[D]
None of the above
(13)
Anti codon is made of
[A]
Beard triplet of Nitrogen bases on tRNA
[B]
Unpaired triplet of Nitrogen bases at one end of tRNA
[C]
Three adjacent nitrogen bases
[D]
Unpaired triplet basesof mRNA
Answer: Unpaired triplet of Nitrogen bases at one end of tRNA
(14)
Griffith effect is
[A]
Bacterial transformation
[B]
Bacterial transduction
[C]
DNA transcription
[D]
RNA translation
Answer: Bacterial transformation
(15)
Adaptor molecule is
[A]
DNA
[B]
tRNA
[C]
mRNA
[D]
None of the above
(16)
mRNA coded language is known as
[A]
Cryptogram
[B]
Codogenes
[C]
Cryptogam
[D]
Crypto analysis
(17)
Which of the following got Nobel Prize for discovering mobile jeans, jumping genes or transposons?
[A]
Barbaramc clintock
[B]
Beadle and Tatum
[C]
Jacob and monod
[D]
Khorana
Answer: Barbaramc clintock
(18)
Housekeeping genes
[A]
Form hormones
[B]
Function only at the time of reproduction
[C]
Constantly operate for cellular activity
[D]
Produce antibodies
Answer: Constantly operate for cellular activity
(19)
Cistron is
[A]
Non functional unit of DNA
[B]
Functional unit of RNA
[C]
Functional unit of DNA
[D]
Non functional unit of RNA
Answer: Functional unit of DNA
(20)
Bacterial transformation was discovered by
[A]
Griffith
[B]
Hershey and chase
[C]
Avery et al
[D]
Watson and Crick
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