Quiz on Protein Synthesis

What is the central dogma of molecular biology?

• RNA → DNA → Protein

• DNA → RNA → Protein

• Protein → RNA → DNA

• DNA → Protein → RNA

Where does transcription take place in eukaryotic cells?

• Ribosome

• Nucleus

• Endoplasmic Reticulum

• Cytoplasm

What is the role of RNA polymerase during transcription?

• To modify mRNA after transcription

• To translate mRNA into protein

• To bind to the promoter and unwind DNA

• To carry amino acids to the ribosome

What is the function of the 5' cap added to mRNA?

• To add amino acids to the growing polypeptide chain

• To remove introns from mRNA

• To protect mRNA and help it attach to ribosomes

• To signal the end of transcription

What happens during the elongation phase of translation?

• The ribosome scans for the start codon

• A polypeptide chain is formed as amino acids are added

• The mRNA is transcribed from DNA

• The ribosome detaches from mRNA

Which type of RNA carries the genetic code from DNA to the ribosome?

• rRNA

• mRNA

• tRNA

• snRNA

What is the role of tRNA in protein synthesis?

• To modify mRNA

• To transcribe DNA into RNA

• To bring amino acids to the ribosome

• To form the ribosome structure

What is the function of introns in mRNA?

• They code for proteins

• They are removed during splicing

• They help in translation

• They are part of the ribosome

What occurs when a stop codon is reached during translation?

• The mRNA is modified

• The ribosome starts a new translation

• The polypeptide chain is released

• Translation continues indefinitely

Which region of a gene is responsible for initiating transcription?

• Terminator

• Intron

• Promoter

• Exon