DNA Structure

• What is the structure of DNA described as?

  A double helix
• What are the two main components of DNA?


  DNA is a polymer made up of two strands
• What is DNA made of?

  Nucleotides
• What are the three main parts of a nucleotide?


  A phosphate group, a sugar molecule, and a base
• How many different bases are found in DNA?


  Four
• What are the four bases in DNA?

  A, C, G, and T
• What does it mean for DNA strands to be complementary?


  It means that the same bases always pair on opposite strands
• Which bases pair together in DNA?

  C pairs with G and A pairs with T
• If given the nucleotide sequence of one DNA strand, what can you determine about the opposite strand?


  You can work out the complementary nucleotides
• What is the significance of the phosphate group and sugar molecule in DNA?


  • They remain unchanged in all nucleotides
  • They form the backbone of the DNA structure
• What is the role of DNA in cells?


  • DNA is the genetic material
  • It is contained in chromosomes in the nucleus
• What will be covered in the next video related to DNA?


  • How DNA is involved in protein synthesis
  • Importance of understanding DNA structure for exam questions