Exploring DNA Transcription and Translation

What is the primary function of enzymes in the digestive system?

• To provide energy directly to cells

• To store nutrients

• To break down food particles into nutrients

• To create new food particles

Where in the cell does transcription occur?

• Cytoplasm

• Mitochondria

• Nucleus

• Golgi apparatus

What is the function of the promoter region in a gene?

• It terminates the transcription process

• It binds RNA polymerase to initiate transcription

• It splices introns from mRNA

• It transports mRNA to the cytoplasm

What molecule does RNA polymerase produce during transcription?

• rRNA

• mRNA

• tRNA

• DNA

What is the role of the spliceosome in mRNA processing?

• It transports mRNA out of the nucleus

• It adds a poly-A tail to mRNA

• It synthesizes mRNA

• It removes introns from mRNA

Which of the following is not a stage of transcription?

• Initiation

• Replication

• Elongation

• Termination

Which site on the ribosome does the tRNA bind to first during translation?

• None of the above

• A site

• P site

• E site

What happens when a stop codon is reached during translation?

• The mRNA is recycled

• The polypeptide chain continues to grow

• The polypeptide is released and the complex dissociates

• A new ribosome is formed

Which component is not involved in the elongation stage of translation?

• Ribosome

• tRNA

• DNA polymerase

• mRNA

How are proteins modified after translation?

• By removing amino acids

• By attaching to lipids

• By folding into three-dimensional structures

• By adding a nucleus