Molecular Basis of Inheritance MCQs | Molecular Basis of Inheritance Objective Type Questions and Answers

Sports GK Questions and Answers 2024 (Latest Updated)

Awards & Honours GK Questions 2024 (Latest Updated)

Questions
1 Linking number is the sum of which geometric components?
A Twist and writhe
B Toroid and writhe
C Twist and wrap
D Twist and crossover

Answer:Twist and writhe
2 3 – dimension structure of cccDNA is ___________
A Nicked
B Supercoiled
C Flat
D Torsionally stressed

Answer: Torsionally stressed
3 Plectonomic writhe is __________
A Cylindrical axis winding
B Long axis twisted around itself
C Helical turns of one strand about the other
D Number of encounters of the two strands of a helix

Answer: Long axis twisted around itself
4 Interwound writhe and spiral writhe are topologically different.
A True
B False

Answer:False
5 Twist and writhe are interconvertible.
A True
B False

Answer: True
6 What is the relation between linking number (Lk), writing number (Wr) and twist number (Tw)?
A Lk = Tw – Wr
B Lk = Wr – Tw
C Tw = Lk – Wr
D Tw = Lk + Wr

Answer:Tw = Lk – Wr
7 How can we remove supercoils from cccDNA?
A Treat with DNase
B Treat with detergent
C Treat with endonuclease
D Application of heat

Answer: Treat with DNase
8 If Lk < Lk0 then DNA is ____________
A Relaxed
B Negatively coiled
C Positively coiled
D ΔLk > 0

Answer:Negatively coiled
9 What is ΔLk and Lk0 dependent upon?
A Histone concentration
B G : A ratio
C Composition of DNA
D Length of DNA

Answer:Length of DNA
10 Strand separation is easily accomplished in positively supercoiled DNA.
A True
B False

Answer:False
11 Which of the following organism has been found to have a positively supercoiled DNA?
A Saurida tumbil
B Monarda didyma
C Thermus aquaticus
D Cyanobacteria

Answer:Thermus aquaticus
12 Which of the following is not true about positive supercoils?
A Helps to avoid denaturing
B Over wounded DNA
C Strand separations require low energy
D Rare form of DNA supercoiling

Answer: Strand separations require low energy
13 Packaging of DNA around nucleosome is known as ____________
A Toroid writhes
B Twist
C Plectonemic writhes
D Supercoils

Answer: Toroid writhes
14 The nucleosome is seen to have negative supercoils.
A True
B False

Answer: True
15 Which of the following is known to relax supercoiled DNA?
A Nuclease
B DNase I
C Endonuclease
D Topoisomerase

Answer:Topoisomerase
16 With respect to topoisomerases which of the following is true?
A Only of one type
B Never changes linking number
C Requires ATP
D Introduces knots

Answer:Requires ATP
17 Topoisomerases I and II differ only on the number of steps required to change the linking number.
A True
B False

Answer:False
18 Which special enzyme introduces negative supercoils in DNA?
A Type I topoisomerase
B Type II topoisomerase
C Gyrase
D Helicase

Answer:Gyrase
19 Which of the following is not a property of topoisomerase?
A Removal of supercoil
B Helps in DNA replication
C Cannot catenate and decatenate
D Utilizes ATP to change linking number

Answer: Cannot catenate and decatenate
20 Topoisomerases introduces catenation to promote cell division.
A True
B False

Answer: False

Random GK Questions

Q. Which atmospheric layer helps in radio transmission ?
Q. An electron microscope gives higher magnification than an optical microscope, because
Q. Which of the following countries have an Unwritten Constitution ?
Q. Lok Sabha and Rajya Sabha had passed the Lokpal Bill with more strong amendments in
Q. The best variety of world’s cotton is known as
Q. Income tax, corporate tax, inheritance tax etc. are incident on the person or organisation. These taxes are called :
Assam Direct Recruitment Test Series

Teacher Eligibility Test

Assam Direct Recruitment Test Series