How are Proteins Made? - Transcription and Translation Explained #66

The video explains protein synthesis, focusing on transcription and translation. Transcription involves copying a DNA gene into mRNA, which then exits the nucleus to be translated into a protein by ribosomes. The mRNA's sequence of bases determines the order of amino acids in the protein, facilitated by tRNA molecules. The video details the structural differences between DNA and mRNA and the roles of RNA polymerase and ribosomes in protein synthesis.

What are the two main steps involved in protein synthesis?

• Replication and Transcription

• Translation and Replication

• Replication and Translation

• Transcription and Translation

What is the role of RNA polymerase during transcription?

• It binds to DNA and synthesizes mRNA

• It synthesizes DNA from RNA

• It unwinds the DNA helix

• It transports mRNA to the ribosome

Which base in mRNA pairs with adenine in DNA during transcription?

• Thymine

• Cytosine

• Uracil

• Guanine

Which of the following is NOT a difference between DNA and mRNA?

• mRNA is longer than DNA

• mRNA contains uracil instead of thymine

• mRNA is single-stranded

• mRNA can leave the nucleus

What is the function of tRNA during translation?

• It unwinds the DNA helix

• It forms the ribosome structure

• It synthesizes mRNA from DNA

• It carries amino acids to the ribosome

How does the ribosome know which amino acid to add during protein synthesis?

• By following the sequence of ribosomal RNA

• By matching tRNA anticodons with mRNA codons

• By reading the DNA sequence

• By using a random selection process

What is the purpose of the ribosome in protein synthesis?

• To transport mRNA out of the nucleus

• To replicate DNA

• To synthesize mRNA

• To assemble amino acids into proteins

What is a codon?

• A sequence of three tRNA bases

• A sequence of three DNA bases

• A sequence of three mRNA bases

• A sequence of three ribosomal RNA bases

What happens to the amino acid chain after it is released from the ribosome?

• It becomes a part of the ribosome

• It is transported back to the nucleus

• It folds into a functional protein

• It is immediately degraded

What is the final product of protein synthesis?

• A strand of mRNA

• A strand of DNA

• A folded protein

• A ribosome