MCQ Bank
Which of the following steps for the production of RNA is not regulated by enhancers?
- A) Elongation
- B) Initiation
- C) Termination
- D) RNA processing
---- enzyme join two DNA fragments with sticky ends.
- A) Topoisomerase
- B) DNA gyrase
- C) DNA polymerase
- D) Ligase
Okazaki fragments are joined by
- A) Primase
- B) Helicase
- C) Gyrase
- D) Ligase
The E. coli RNA polymerase adds ------nucleotides per second.
- A) 20
- B) 30
- C) 40
- D) 50
When was the operation mechanism of a bacterial operon first elucidated?
- A) 151
- B) 1971
- C) 1981
- D) 1991
Lysosomes contain more than 50 types of -----enzymes
- A) Hydrolases
- B) Lipases
- C) Amylases
- D) Proteases
Insulin formed by genetically engineered bacteria and pancreas used for----------
- A) Maintains the blood glucose level
- B) Maintains the enzyme level
- C) Maintains protein level
- D) Maintains cholesterol level
Insulin formed by genetically engineered bacteria and pancreas used for----------
- A) Maintains the blood glucose level
- B) Maintains the enzyme level
- C) Maintains cholesterol level
- D) Maintains protein level
Frame shift mutation is a
- A) Substitution among nucleotide
- B) Insertion of nucleotide in a DNA sequence
- C) Deletion of nucleotide in a DNA sequence
- D) Reading frame of nucleotide in a DNA changed
Frame shift mutation is a
- A) Substitution among nucleotide
- B) Insertion of nucleotide in a DNA sequence
- C) Deletion of nucleotide in a DNA sequence
- D) Reading frame of nucleotide in a DNA changed
Triglycerides have---bonding
- A) Ester linkage
- B) Ether linkage
- C) Peptide linkage
- D) Glycosidic linkage
Peptide bond is linkage between ---- and ---- form proteins
- A) Carbon. Hydrogen
- B) Carbon .nitrogen
- C) Carbon .oxygen
- D) Carbon sulphur
The catalytic unit of RNA polymerases when placed properly during initiation is just over
- A) -1 site
- B) O site
- C) +1 site
- D) - 10 site
Binds the enzyme at nonactive site cause a conformational change prevents enzyme from binding its substrate
- A) competitive initiators
- B) competitive inhibitors
- C) noncompetitive initiators
- D) noncompetitive inhibitors
Which enzyme is used to join together two different types of DNA molecules?
- A) Ligase
- B) Endonuclease
- C) Protease
- D) exonuclease
Mendel did not observe linkage due to..
- A) Crossing over
- B) Independent assortment
- C) Linkage
- D) Synapses
Golgi apparatus manufactures----------------- compound for the plant wall
- A) poly-saccharides
- B) Mono-saccharides
- C) Oligo-saccharides
- D) Di-saccharides
---------vitamin acts as receptor for light and present in eyes.
- A) Vitamin C
- B) Vitamin A
- C) Vitamin D
- D) Vitamin B
Purine has----structure
- A) Double ringed
- B) Single ringed
- C) Branched structure
- D) Linear structure
Amount of free energy released or used in a chemical reaction is dependent on which of the following factors
- A) Enthalpy
- B) Entropy
- C) Absolute temperature
- D) a.bandc