Introduction to the Genetic Code

The video tutorial explains the genetic code, focusing on DNA and RNA structures, and the role of nucleotides. It covers the nitrogenous bases that form the genetic code, the complementary pairing of DNA strands, and the function of codons in protein synthesis. The tutorial also describes the process of gene expression, where mRNA transcribes DNA instructions to ribosomes for protein creation.

What forms the backbone of both DNA and RNA?

• Amino acids

• Nitrogenous bases

• Phosphate group

• Sugar phosphate

Which base is found in RNA but not in DNA?

• Thymine

• Adenine

• Uracil

• Cytosine

What is the complementary base pair for adenine in DNA?

• Uracil

• Thymine

• Guanine

• Cytosine

How many three-letter codons are possible in the genetic code?

• 16

• 32

• 64

• 128

What is the role of messenger RNA in protein synthesis?

• It carries protein-making instructions to ribosomes

• It forms the backbone of DNA

• It pairs with DNA bases

• It acts as a stop signal