QUESTION IMAGE
Question
the diagram shows the nucleus and ribosomes in a cell.
what is the relationship between the nucleus and ribosomes?
a. ribosomes enter the nucleus to deliver rna for transcription.
b. ribosomes transcribe dna from protein molecules in the nucleus.
c. ribosomes use transcribed rna in the nucleus to create proteins.
d. ribosomes deliver the proteins needed by the nucleus to transcribe dna.
directions: read the passage below and answer the question(s) that follow
passage
eukaryotic cell structures
plant and animal cells contain several organelles that each have their own structure and
function. however, all of the organelles must work together to keep the cell functioning and
maintaining homeostasis. the image shows a plant cell and an animal cell.
To determine the relationship between the nucleus and ribosomes, we analyze each option:
- Option A: Ribosomes do not enter the nucleus to deliver RNA for transcription. Transcription occurs in the nucleus, and ribosomes are in the cytoplasm or on the rough ER. So A is incorrect.
- Option B: Transcription (synthesis of RNA from DNA) occurs in the nucleus, and ribosomes are involved in translation (protein synthesis), not transcription of DNA from protein. So B is incorrect.
- Option C: The nucleus transcribes DNA into RNA (messenger RNA). This mRNA then moves out of the nucleus to the ribosomes. Ribosomes use this transcribed RNA to translate the genetic code into proteins (translation). This matches the correct process of gene expression (transcription in nucleus, translation at ribosomes). So C is correct.
- Option D: Ribosomes are responsible for protein synthesis, not delivering proteins to the nucleus for DNA transcription. Transcription in the nucleus uses DNA as a template and does not require ribosomal proteins for that process. So D is incorrect.
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C. Ribosomes use transcribed RNA in the nucleus to create proteins.