Protein Synthesis Practice Problems Explained

Miss W explains protein synthesis, covering transcription and translation processes. She guides through practice problems, including determining amino acid sequences from DNA and RNA, and calculating proteins from thymine nucleotides. The video emphasizes understanding codons and the role of stop codons in protein synthesis.

What is the first step in protein synthesis?

• Mitosis

• Translation

• Transcription

• Replication

Which nucleotide is present in RNA but not in DNA?

• Uracil

• Thymine

• Cytosine

• Adenine

Which of the following is not a building block of DNA?

• Phosphate groups

• Amino acids

• Nucleotides

• Sugar molecules

How many nucleotides form a codon?

• 2

• 3

• 5

• 4

What does a codon code for?

• A ribosome

• A sugar molecule

• An amino acid

• A nucleotide

What amino acid does the codon GUA code for?

• Phenylalanine

• Isoleucine

• Valine

• Lysine

If a DNA sequence has 21 thymine nucleotides, how many amino acids will the corresponding protein have?

• 3

• 21

• 7

• 14

What does AAA codon code for?

• Stop

• Lysine

• Methionine

• Valine

What is the role of a stop codon in protein synthesis?

• It starts the synthesis process.

• It duplicates the DNA.

• It adds an amino acid.

• It signals the end of the protein chain.

How many amino acids does the given longer DNA sequence code for?

• 7

• 9

• 5

• 3