Multiple Choice
Which of the following best describes the primary role of enzymes in chemical reactions?
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6. Enzymes and Enzyme Kinetics
Enzymes
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Which of the following best describes the two important roles of ribozymes?
A
They act as structural components of ribosomes and store genetic information.
B
They degrade proteins and regulate gene expression at the transcriptional level.
C
They transport proteins across membranes and synthesize DNA.
D
They catalyze biochemical reactions and can self-splice RNA molecules.
Verified step by step guidance1
Understand the term 'ribozyme': Ribozymes are RNA molecules that act as enzymes, meaning they can catalyze biochemical reactions without the need for proteins.
Recognize the two key roles of ribozymes: (1) They catalyze specific biochemical reactions, such as cleaving RNA molecules, and (2) they can self-splice RNA, which involves removing introns and joining exons in RNA molecules.
Eliminate incorrect options: Review each choice and identify why it does not align with the known functions of ribozymes. For example, ribozymes do not store genetic information or degrade proteins.
Focus on the correct answer: Ribozymes are unique because they combine catalytic activity with RNA processing functions, such as self-splicing, which is essential for RNA maturation.
Summarize the reasoning: The correct answer is 'They catalyze biochemical reactions and can self-splice RNA molecules,' as these are the two primary roles of ribozymes in biological systems.
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