Base (biology)

The video explains the structure of DNA, focusing on the four types of bases: adenine, thymine, cytosine, and guanine. It describes how these bases pair with each other and how their sequence along the DNA strand forms the genetic code.

What are the smaller molecules called that form pairs between the two strands of DNA?

• Proteins

• Bases

• Carbohydrates

• Lipids

How many types of bases are there in DNA?

• Two

• Three

• Four

• Five

Which base does adenine always pair with in DNA?

• Guanine

• Cytosine

• Uracil

• Thymine

What is the base that cytosine pairs with?

• Uracil

• Adenine

• Thymine

• Guanine

What determines the genetic code along a DNA molecule?

• The order of bases

• The number of DNA strands

• The shape of the DNA molecule

• The length of the DNA molecule