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Free download in PDF Multiple Choice Questions with 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)
Fredrick Griffith’s experiment involving Streptococcus pneumonia lead to the discovery of____________
[A]
DNA as genetic material
[B]
RNA as genetic material
[C]
Protein as genetic material
[D]
Transforming principle
Answer: Transforming principle
(2)
Definite results proving DNA to be genetic material was given by __________
[A]
Fredrick Griffith
[B]
Hershey and Chase
[C]
Avery, Macleod and MacCarty
[D]
Meselson and Stahl
Answer: Avery, Macleod and MacCarty
(3)
Which of the following statements regarding the mechanism of transformation in Bacillus subtilis is false?
[A]
A competent bacteria contains a DNA receptor/translocation complex
[B]
While translocation of exogenous DNA, both strands gets passage into the cell
[C]
While translocation of exogenous DNA, only one strand gets passage into the cell
[D]
The exogenous DNA recombines and incorporates itself in the chromosome of the recipient cell
Answer: While translocation of exogenous DNA, both strands gets passage into the cell
(4)
What were the main criteria taken under consideration for the experiment by Hershey and Chase?
[A]
DNA contains phosphorus, protein contains sulfur
[B]
Protein contains phosphorus, DNA contains sulfur
[C]
Both DNA and protein contains phosphorus and not sulphur
[D]
Both DNA and protein contains sulfur and not phosphorus
Answer: DNA contains phosphorus, protein contains sulfur
(5)
What combination of radiolabelling is correct in case of Hershey and Chase’s demonstration of DNA as genetic material in T2 bacteriophage?
[A]
31P, 35S
[B]
31P, 32S
[C]
31P, 14C
[D]
31P, 12C
(6)
Recently, scientists have developed a procedure in which protoplasts of E. coli could be directly infected with the phage DNA. This process is termed as_________
[A]
Transformation
[B]
Transduction
[C]
Transfection
[D]
Mutation
(7)
According to Mendel’s experiments gene carry genetic information from parents to offspring’s. On which plant did he perform his experiments?
[A]
Oryza sativa
[B]
Pisum sativam
[C]
Allium cepa
[D]
Vitis vinifera
(8)
Plasmids are ____________
[A]
Double stranded DNA
[B]
Circular double stranded DNA
[C]
Linear double stranded DNA
[D]
Supercoiled circular double stranded DNA
Answer: Circular double stranded DNA
(9)
What stores the genetic information in DNA?
[A]
Sugar
[B]
Phosphate
[C]
Nitrogenous base
[D]
Polymerase
(10)
DNA always carries the genetic information for all organisms.
(11)
What is the major type of RNA produced in the cell required for translation?
[A]
mRNA
[B]
tRNA
[C]
rRNA
[D]
siRNA
(12)
Which macromolecule is not abundantly found though being of critical importance for biological mechanisms?
[A]
Proteins
[B]
Lipids
[C]
Nucleic acids
[D]
Polysaccharides
(13)
Which of the following is wrongly paired?
[A]
Proteins – peptide bond
[B]
Nucleic acid – hydrogen bond
[C]
Polysaccharide – glycosidic bond
[D]
Phospholipids –phosphate linkage
Answer: Nucleic acid – hydrogen bond
(14)
With respect to nucleosides which of the following is paired correctly?
[A]
Purine – Adenosine, Thymidine
[B]
Purine – Guanosine, Thymidine
[C]
Pyrimidine – Uridine, Cytidine
[D]
Pyrimidine – Uridine, Adenosine
Answer: Pyrimidine – Uridine, Cytidine
(15)
Which of the following is not a component of the nucleic acid backbone?
[A]
Pentose sugar
[B]
Phosphate group
[C]
Nucleotide
[D]
Phosphodiesterase bond
(16)
According to Chargaff’s rule the two strands of DNA has ___________
[A]
Same molecular weight
[B]
Same amount of A and G
[C]
Different amount of A and G
[D]
Different molecular weight
Answer: Different molecular weight
(17)
In one strand of a double stranded DNA the rate of occurrence of A is 3 times C in consecutive 10 bases. So how many G will be there in 100 base pairs of a DNA duplex?[Consider G=T in one strand].
[A]
30
[B]
20
[C]
40
[D]
60
(18)
In a diploid organism with 30,000 bases haploid genome contains 23% A residues. What is the number of G residues in the genome of this organism?
[A]
16000
[B]
16200
[C]
16500
[D]
14200
(19)
Which of the following is not a characteristic of nucleotide bases?
[A]
Planar
[B]
Heterocyclic
[C]
Aliphatic
[D]
Ubiquitous
(20)
Which of the following factors do not provide to the separation of DNA fragments during electrophoresis?
[A]
Chargaff’s rule
[B]
Matrix density
[C]
Ethidium bromide
[D]
Size
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