Translation

Question 1

What is the process of translation in protein synthesis?

Answer 1

Conversion of mRNA to a protein

The “message” in mRNA needs to be read and translated so amino acids can be assembled into a polypeptide.

Question 2

Where does translation occur in the cell?

Answer 2

Ribosomes

Ribosomes are the cellular structures where proteins are synthesized.

Question 3

What is the significance of codons in translation?

Answer 3

3-nucleotide sequences on mRNA that code for a specific amino acid

Biochemists discovered codons as essential components in the translation process.

Question 4

How many mRNA codons can be formed from the four types of nucleotides?

Answer 4

64 mRNA codons

The four nucleotides can be rearranged into various combinations to form codons.

Question 5

What is the START codon and its corresponding amino acid?

Answer 5

AUG - Met

The START codon signals the beginning of translation.

Question 6

List the STOP codons.

Answer 6

• UAA
• UAG
• UGA

STOP codons signal the termination of translation.

Question 7

What role does transfer RNA (tRNA) play in translation?

Answer 7

Brings amino acids to the ribosome by matching tRNA anticodons to the mRNA codons

tRNA is crucial for the assembly of amino acids into a polypeptide chain.

Question 8

What is an anticodon?

Answer 8

3-nucleotide sequence on tRNA that is complementary to the mRNA codon

Anticodons ensure the correct amino acid is brought to the ribosome.

Question 9

What are the three sites found in a ribosome during translation?

Answer 9

• A site (aminoacyl-tRNA site)
• P site (peptidyl-tRNA site)
• E site (exit site)

Each site has a specific function in the translation process.

Question 10

What happens during the initiation phase of translation?

Answer 10

Brings together mRNA, ribosome, subunits, and initiator tRNA

This phase sets the stage for the translation process to begin.

Question 11

What occurs during the elongation phase of translation?

Answer 11

Adding amino acids based on the mRNA codon sequence

This phase involves the sequential addition of amino acids to the growing polypeptide chain.

Question 12

What triggers the termination of translation?

Answer 12

STOP/end codon and polypeptide release

The termination phase concludes the translation process.

Question 13

What is formed when two amino acids bond together?

Answer 13

Peptide bond

Peptide bonds link amino acids in a polypeptide chain.

Question 14

What happens to the amino acid chain after translation?

Answer 14

Folds and twists to become a protein

The final structure of the protein is determined by the sequence of amino acids.