What are the rungs of the "DNA ladder" made of?

Short/Brief Note

The rungs of the "DNA ladder" are made of nitrogenous bases.
These are Adenine (A), Guanine (G), Cytosine (C) and Thymine (T).

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Chapter 2: Structure of Chromosomes - Exercise 1 [Page 20]

Chapter 2 Structure of Chromosomes
Exercise 1 | Q 21 | Page 20

Chapter 2 Structure of chromosome, cell cycle and cell division
Review Questions | Q C. 2. | Page 20

Correct the following statement if there is any mistake.

The four nitrogenous bases in the DNA are Guanine, Thiamine, Adrenaline and Cytosine.

Answer the following question in your own words.

Describe the structure of the DNA molecule.

State whether the following sentence is true or false:

Each spiral of the DNA has 12 nucleotides.

Choose the correct answer :
Adenine is a __________

Choose the correct answer :
Spirally coiled double strands are observed in ____________

How many codons are needed to specify three amino acids?

The ______ units form the backbone of the DNA.

____________ were used by Friedrich Miescher for his experiments.

Expand the abbreviation - DNA.