Multiple Choice
A solution is tested with Biuret reagent, resulting in a purple color. What does this indicate about the presence of protein in the sample?
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4. Biomolecules
Proteins
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Proteins combine with ______ to form a ribosome.
A
ribosomal RNA (rRNA)
B
deoxyribonucleic acid (DNA)
C
messenger RNA (mRNA)
D
transfer RNA (tRNA)
Verified step by step guidance1
Understand the structure and function of ribosomes: Ribosomes are cellular structures responsible for protein synthesis. They are composed of both proteins and RNA molecules.
Identify the type of RNA involved in ribosome formation: Ribosomal RNA (rRNA) is a key component of ribosomes, providing structural and functional support for protein synthesis.
Eliminate incorrect options: Deoxyribonucleic acid (DNA) is not part of ribosome formation; it serves as the genetic blueprint. Messenger RNA (mRNA) carries genetic information from DNA to ribosomes, but does not combine with proteins to form ribosomes. Transfer RNA (tRNA) helps in translating mRNA into proteins but is not part of ribosome structure.
Focus on the correct option: Ribosomal RNA (rRNA) combines with proteins to form ribosomes. This combination creates the large and small subunits of the ribosome.
Conclude the reasoning: The correct answer is ribosomal RNA (rRNA), as it directly interacts with proteins to form the ribosome structure.
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