The Main Principles of Heredity: The Chemical Structure of DNA

The video tutorial explains the structure of DNA, focusing on its double helix form composed of two polymeric strands. It delves into the arrangement of nucleotides, highlighting their anti-parallel nature. The tutorial also covers the major structural components of DNA, such as the deoxyribose sugar backbone and nitrogenous bases, which are crucial for genetic information. The video further explains the types of nitrogenous bases, purines and pyrimidines, and the base pairing rules that form the genetic code.

What is the structural form of DNA as described in the video?

• Single helix

• Double helix

• Triple helix

• Quadruple helix

What is the main role of nitrogenous bases in DNA?

• Providing structural support

• Carrying genetic information

• Linking nucleotides

• Forming the sugar backbone

Which type of bond links nucleotides together in DNA?

• Covalent bond

• Phosphodiester bond

• Ionic bond

• Hydrogen bond

Which of the following is a purine base found in DNA?

• Uracil

• Adenine

• Cytosine

• Thymine

According to base pairing rules, which base pairs with cytosine?

• Uracil

• Adenine

• Thymine

• Guanine