Molecular Basis of Inheritance MCQ/Objective question Chapter 6 Biology Class 12
The genetic material in the most organisms is:
- a. DNA
- b. RNA
- c. Nucleotide
- d. Nucleoside
Which nucleotide is present in RNA but not in DNA?
- a. Adenine
- b. Guanine
- c. Thymine
- d. Uracil
Which among these is not a pyrimidine group-based nucleotide?
- a. Adenine
- b.Cytosine
- c. Uracil
- d. Thymine
A nucleotide base is linked to the -OH group of sugar. Which bond is it?
- a.
- b. N-Glycosidic bond
- c. 3′-5′ phosphodiester bond
- d. Hydrogen bond
In a double-stranded DNA. The amount of bases is always:
- a. A+T = C+G
- b. A+C = T+G
- c. A/T = C/G
- d. None
Complementary bases in a DNA are tied with which bond?
- a. Carbond bond (C-C)
- b. Hydrogen bond (H-H)
- c. Amide bond (-CONH)
- d. None
How many hydrogen bonds are there between cytosine and guanine?
- a. one
- b. Two
- c. Three
- d. Four
As per central dogma of Francis Crick genetic information flows as:
- a. DNA<RNA<Protein
- b. RNA<DNA<Protein
- c. DNA<Protein<RNA
- d. None
Octamer of which protein wraps DNA to form nucleosome?
- a. Tubulin
- b. Myosin
- c. Histone
- d. None
Transcriptionally active part of chromatin is:
- a. Euchromatin
- b. Heterochromatin
- c. Both
- d. None
In Griffith’s experiment of Streptococcus on mice, Extract of dead smooth strain made the rough starin virulent. Which material transferred from the dead smooth strain did that?
- a. DNA
- b. RNA
- c. Protein
- d. None
Which organism is more likely to mutate at a faster rate?
- a. Bacteria
- b. DNA virus
- c. RNA virus
- d. All have the same chances to mutate
How DNA is the genetic material established by Hershey and chase?
- a. Using S and R strain of Streptococcus
- b. Using bacteriophage with
- c. Both
- d. None
The formation of extra set of DNA from parentral DNA is:
- a. Replication
- b. Transcription
- c. Translation
- d. None
Set of enzymes that assist replication is:
- a. DNAse
- b. RNAse
- c. DNA polymerase
- d. All
DNA polymerase runs in which direction?
- a. 5′ to 3′
- b. 3′ to 5′
- c. Both
- d. None
DNA strand with 3′ to 5′ polarity replicates in samller fragents. The nick formed is sealed by:
- a. DNAse
- b. DNA polymerase
- c. DNA ligase
- d. Telomerase
Process of formation of RNA from DNA is called:
- a. Replication
- b. Translation
- c. Transcription
- d. All
Transcription starts at which region of DNA?
- a. Promoter
- b. Structural gene
- c. Terminator
- d. Anywhere
Only one strand of DNA undergoes transcription. This strand is know as:
- a. Coding strand
- b. Template strand
- c. None
Which among these is not a stage of transcription?
- a. Initiation
- b. Elongation
- c. Termination
- d. Ligation
Coding sequence of RNA is called:
- a. Exons
- b. Introns
- c. Codons
- d. Sense
Non-coding sequence that is Intron is removed during maturation of RNA by process:
- a. Ligation
- b. Splicing
- c. Capping
- d. Tailing
Stop codons are:
- a. UUU, GGG, CCC
- b. AAA, AAU, AAG
- c. UAA, UAG, UGA
- d. None
Start codon for RNA translation is:
- a. AUG
- b. ACG
- c. UAA
- d. UAG
Scickle cell anaemia is a an example of:
- a. Point mutation
- b. Frameshift insertion
- c.Frameshift deletion
- d. None
See also:
Molecular Basis of Inheritance MCQ/Objective question Chapter 6 Biology Class 12
Ref: ch6
