Question

cells and body systems online practice
complete this assessment to review what youve learned. it v
what is the function of mrna (messenger rna)? (1 point)
○ mrna functions as a template for rna synthesis.
○ mrna functions as a template for protein synthesis.
○ mrna functions as a template for dna synthesis.
○ mrna functions as a template for lipid synthesis.
check answer remaining attempts : 3

Explanation:

To determine the function of mRNA, we recall the central dogma of molecular biology. mRNA (messenger RNA) is transcribed from DNA and carries the genetic code from the nucleus to the ribosomes in the cytoplasm. At the ribosomes, this mRNA serves as a template for the synthesis of proteins. Let's analyze each option:

• The first option says mRNA is a template for RNA synthesis, but RNA synthesis (transcription) uses DNA as a template, not mRNA, so this is incorrect.
• The second option states mRNA functions as a template for protein synthesis, which aligns with the central dogma and the role of mRNA in translation (the process of making proteins from the genetic code in mRNA).
• The third option claims mRNA is a template for DNA synthesis, but DNA synthesis (replication) uses existing DNA as a template, and mRNA is not involved in DNA synthesis, so this is incorrect.
• The fourth option says mRNA is a template for lipid synthesis, but lipid synthesis has different mechanisms and does not use mRNA as a template, so this is incorrect.

Answer:

B. mRNA functions as a template for protein synthesis.