Quiz on mRNA Processing

What happens to mRNA at the end of transcription before it leaves the nucleus?

• It is translated into protein.

• Introns are removed, and exons are spliced together.

• It is degraded by enzymes.

• It is converted into DNA.

What is the function of exons in mRNA?

• They are noncoding regions.

• They are coding regions for proteins.

• They are involved in DNA replication.

• They are responsible for mRNA degradation.

What is the role of tRNA during the process of translation?

• It brings amino acids to the ribosomes.

• It carries the genetic code from DNA.

• It forms the structure of ribosomes.

• It synthesizes mRNA.

Where do matching anticodons on tRNA molecules bind during translation?

• P site

• E site

• A site

• mRNA binding site

What happens to tRNA after its amino acid is dropped off?

• It moves to the P site.

• It moves to the E site and leaves.

• It stays in the A site.

• It is degraded immediately.

When does the process of translation stop?

• When a start codon is reached.

• When a stop codon is reached.

• When the ribosome is full.

• When all tRNA molecules are used.

What happens once the stop codon is reached in protein synthesis?

• The amino acid chain is released and folded.

• The amino acid chain is destroyed.

• The amino acid chain is duplicated.

• The amino acid chain is shortened.

What is added to the 3' end of mRNA during editing within the nucleus?

• Guanine cap

• Poly A tail

• Introns

• Start codon

Where is mRNA sent after being edited in the nucleus?

• Golgi apparatus

• Mitochondria

• Cytoplasm and ribosome

• Nucleus

What is the role of tRNA in the ribosome?

• To edit mRNA

• To create a stop codon

• To read mRNA and create an amino acid strand

• To disassemble the ribosome complex