Question

In: Anatomy and Physiology

Which of the following events occurs during transcription?

Part A

Which of the following events occurs during transcription?

  • Those segments of the RNA strand that do not actually code for the protein are removed.
  • A molecule of RNA is formed based on the sequence of nucleotides in DNA.
  • The message in mRNA is translated into a protein.
  • A cap is added to the RNA molecule.
  • mRNA binds to a ribosome in the cytoplasm.

 

Part B

Which of the following is a correct statement about mRNA?

  • mRNA binds directly to amino acids during translation.
  • mRNA includes a cap that consists of extra adenine nucleotides.
  • mRNA moves from the nucleus to the cytoplasm following RNA processing.
  • Segments of mRNA that code for protein are removed before translation.
  • mRNA is transcribed from DNA in the cytoplasm.

 

Part C

The site of translation is

  • the plasma membrane.
  • ribosomes in the cell cytoplasm.
  • ribosomes in the cell nucleus.
  • the Golgi apparatus.
  • the cell nucleus.

 

Part D

Which one of the following does not play a role in translation?

  • tRNA
  • Anticodon
  • Amino acids
  • Ribosomes
  • DNA

 

Part E

Which of the following does not occur during RNA processing?

  • Segments of the RNA strand that do not actually code for the protein are removed.
  • Adenine nucleotides are added to the end of the RNA strand, forming a tail.
  • A modified guanine nucleotide is added to the beginning of the RNA strand as a cap.
  • mRNA attaches to the small subunit of a ribosome.
  • Segments of RNA that do code for the protein are reconnected.

Solutions

Expert Solution

A. A molecule of RNA is formed based on the sequence of nucleotides in DNA.

Transcription includes replication of DNA molecule and formation of complementary strand (RNA) to one of the DNA strand

B. mRNA moves from the nucleus to the cytoplasm following RNA processing

RNA process is post-translation processing, which is done in the cytoplasm of the cell.

C. ribosomes in the cell cytoplasm.

In a eukaryotic cell, transcription occurs in the nucleus, and translation occurs in the cytoplasm

D. DNA

DNA plays the role only in transcription, not in translation.

E. mRNA attaches to the small subunit of a ribosome.

In post-translation processes, mRNA gets separated from ribosomes.

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