MDCAT Biology MCQ #787

A student isolates ribosomes from a cell. What percentage of the ribosome's total mass is typically composed of ribosomal RNA (rRNA)?

MDCAT Biology MCQ #787

  1. Question 1

    Q1. A student isolates ribosomes from a cell. What percentage of the ribosome's total mass is typically composed of ribosomal RNA (rRNA)?

    • A) 40% to 50%
    • B) 10% to 20%
    • C) 80% to 90%
    • D) 5% to 10%

    Answer: 40% to 50%

    Explanation: Ribosomes are composed of approximately 40-50% ribosomal RNA and 50-60% protein, making rRNA the structural core.