Question

which of the following statements is true?
a mrna is part of the ribosome.
b rrna relays amino acids to the ribosome.
c trna transfers the ribosome to the cytoplasm.
d mrna is made in the nucleus.

Explanation:

• Option a: Ribosomes are composed of rRNA and proteins, not mRNA.
• Option b: tRNA, not rRNA, transports amino acids to the ribosome.
• Option c: tRNA transfers amino acids, not the ribosome, and ribosomes are already in the cytoplasm (or rough ER).
• Option d: In eukaryotic cells, mRNA is synthesized via transcription in the nucleus using DNA as a template.

Answer:

d. mRNA is made in the nucleus.