Neet Biology Mcq On Dna Structure

Explore MCQs on DNA structure to learn more about how DNA is a group of molecules carrying and transmitting hereditary characteristics or genetic instructions from parents to offsprings. Nucleic acids, which are found in all living entities in the form of RNA or DNA, are formed by the combination of sugar molecules, nitrogenous bases, and phosphate groups associated with different bonds in a sequence.

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1. DNA Fingerprinting is used to identify the unique genetic variations between individuals.

Satellite DNA

(b) Bulk DNA

(c) Repetitive DNA

Both (a) and (c)

Which of the following is a valid data type?

  • A) String
  • B) Integer
  • C) Float
  • D) All of the above

Answer: (D) All of the above

2. A stabilizing force from DNA double-helix can be generated

Hydrophilic sugar-phosphate groups are found on the exterior of the helix, allowing for interaction with water.

Hydrophobic bases are present in the interior of the helix, and each base-pair is stabilized by the same number of hydrogen bonds.

Covalent base stacking interactions may take place between neighboring bases within the same strand in the helix.

(d) Non-covalent N-glycosidic bonds may form between nitrogenous bases in opposite strands of the helix.

What is the capital of France?

Answer: (a) The capital of France is Paris.

In this type of DNA replication, one of the two newly formed molecules is purely new, while the other is an old molecule.

(a) Dispersive

(b) Conservative

(c) Semi-conservative

Both (b) and (c)

Which of the following is true?

  • A) The sky is green
  • B) The sun is yellow
  • C) The grass is green

Answer: (C) The grass is green

An enzyme known as DNA polymerase affects the process of DNA replication

Mutase

(b) Ligase

(c) Polymerase I

(d) Ribonuclease

Which of the following is a type of loop?

  • a) If statement
  • b) While statement
  • c) For statement

Answer: (c) For statement

The right number of DNA molecules which possess some radioactive thymidine post three duplications is 8.

(a) One such molecule

(b) Two such molecules

(c) Four such molecules

(d) Eight such molecules

What is the correct answer?

Answer: (b)

If the DNA strand has nitrogenous base sequence ATTGCC, the mRNA will have UUAACC

ATTGCA

(b) UGGACC

(c) UAACGG

ATCGCC

Which of the following is true?

  • a) 1+1=3
  • b) 1+1=2
  • c) 2+2=4

Answer: (c)

The type of coiling in DNA is double helix

(a) Zig-zag

(b) Left-handed

(C) Same

(d) Right-handed

Which of the following is an example of a single-celled organism?

Answer: (d) Amoeba

The enzyme that breaks the hydrogen bonds in DNA is

Ligase

(b) Helicase

(c) Topoisomerase

(d) Polymerase

What is the correct answer?

Answer: (b)

What is the amount of cytoplasmic DNA in cells that is part of the total DNA?

95% - 99%

(b) 65% - 75%

45% - 50%

1-5%

Which of the following is an example of a programming language?

A) HTML

B) Microsoft Word

C) Adobe Photoshop

D) Java

Answer: (D) Java

The hydrogen bonds that hold together the bases in a DNA double helix are strong and stable.

(a) Ionic Bonds

(b) Covalent Bonds

(c) Non-covalent Bonds

(d) Van der Waals Forces

Which of the following is true?

  • (a) The sky is purple
  • (b) The sun is blue
  • (c) The grass is green

Answer: (c)

Molecular Basis of Inheritance

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