Prokaryotic Transcription and Translation Coupling Quiz

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Questions and Answers

What is the primary function of ribosomes attached to rough ER during translation?

  • Produce secretory proteins
  • Create proteins that remain in the cytoplasm
  • Make proteins that function in membranes (correct)
  • Generate proteins involved in transcription

During translation in prokaryotes, what is the relationship between transcription and translation?

  • Transcription is not required for translation
  • Translation occurs before transcription
  • They occur sequentially but in different cellular compartments
  • They are coupled processes occurring simultaneously (correct)

Which type of ribosomes produce proteins that remain and function within the cytoplasm?

  • Free ribosomes (correct)
  • Ribosomes attached to smooth ER
  • Mitochondrial ribosomes
  • Ribosomes attached to rough ER

Where do transport proteins synthesized during translation get directed to?

<p>They are secreted from the cell (B)</p> Signup and view all the answers

What role do tRNA molecules play in protein synthesis?

<p>Carrying amino acids to the ribosome (B)</p> Signup and view all the answers

Which organelle is directly involved in the synthesis of insulin during translation?

<p>Endoplasmic reticulum (ER) (C)</p> Signup and view all the answers

Which cellular component is responsible for translating the mRNA into protein in prokaryotes?

<p>Ribosomes (A)</p> Signup and view all the answers

In prokaryotes, what is the main reason that transcription and translation are coupled?

<p>To maintain genetic stability (C)</p> Signup and view all the answers

Which type of ribosomes are responsible for making newly synthesized proteins that remain in the cytoplasm of a cell?

<p>Only free ribosomes (not attached to the rER) (D)</p> Signup and view all the answers

In prokaryotic cells, what is the role of tRNA during translation?

<p>Carry amino acids to the ribosome for protein synthesis (D)</p> Signup and view all the answers

What happens when a frameshift mutation occurs during translation?

<p>A point mutation alters the reading frame, potentially leading to a nonfunctional protein (B)</p> Signup and view all the answers

Why are ribosomes considered essential for protein synthesis in cells?

<p>To catalyze the formation of peptide bonds between amino acids (A)</p> Signup and view all the answers

What is the role of transfer RNA (tRNA) in translation?

<p>Transfers amino acids from cytoplasm to a ribosome (C)</p> Signup and view all the answers

Which site on the ribosome holds the tRNA carrying the growing polypeptide chain during translation?

<p>P site (B)</p> Signup and view all the answers

What is the function of the start codon (AUG) in translation?

<p>Initiates translation process (D)</p> Signup and view all the answers

What happens during the termination phase of translation?

<p>The ribosome releases the polypeptide and tRNA (C)</p> Signup and view all the answers

In translation, what occurs in the A site of the ribosome?

<p>Peptide bond formation between amino acids (D)</p> Signup and view all the answers

Which step comes first in translation elongation?

<p>Next amino acid binds to the A site (D)</p> Signup and view all the answers

What is the function of the release factor during translation termination?

<p>Binds to stop codon and releases the polypeptide (A)</p> Signup and view all the answers

How do polyribosomes contribute to protein synthesis?

<p>They allow multiple ribosomes to translate the same mRNA simultaneously (A)</p> Signup and view all the answers

What is the function of small ribosomal subunit during translation initiation?

<p>Moves down mRNA until it reaches a stop codon (C)</p> Signup and view all the answers

Which component is involved in connecting mRNA codons to tRNA anticodons on the ribosome?

<p>Proteins and ribosomal RNA (rRNA) (A)</p> Signup and view all the answers

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