Prepare for NEET with Botany-specific practice questions. Covering all major Botany chapters, this is perfect for your NEET Biology needs.
A critical piece of evidence supporting the RNA world hypothesis is the existence of ribozymes. Which characteristic of ribozymes is MOST significant in this context?
Their sensitivity to RNase degradation
Their single-stranded structure
Their ability to catalyze both self-replication and peptide bond formation
Their presence in both prokaryotes and eukaryotes
In the context of the RNA world hypothesis, the discovery of catalytic RNA molecules (ribozymes) was crucial. Which of the following functions performed by ribozymes is MOST relevant to supporting the hypothesis?
Degrading proteins, demonstrating early enzymatic activity
Catalyzing RNA polymerization, suggesting a mechanism for self-replication
Splicing RNA, indicating a role in gene regulation
Synthesizing amino acids, demonstrating prebiotic metabolic pathways
What crucial role does RNA play in the RNA world hypothesis?
Only genetic information storage
Only catalysis
Both genetic information storage and catalysis
Structural support
What are RNA molecules with catalytic activity called?
Enzymes
Ribozymes
Ribosomes
Deoxyribozymes
In the context of the RNA world hypothesis, what is the significance of ribozymes?
They store genetic information.
They are building blocks of proteins.
They demonstrate that RNA can catalyze reactions.
They transport amino acids.
The RNA world hypothesis proposes that RNA was the primary genetic material in early life. Which of the following properties of RNA supports this hypothesis?
RNA is more stable than DNA.
RNA can act as both a carrier of genetic information and a catalytic enzyme.
RNA is double-stranded, providing redundancy in genetic information.
RNA cannot be degraded by enzymes.
Ribozymes are an important piece of evidence supporting the RNA world hypothesis. What is the primary function of a ribozyme?
Storing genetic information
Transporting amino acids
Catalyzing biochemical reactions
Forming cell membranes
The RNA world hypothesis suggests that self-replicating RNA molecules were crucial for the origin of life. What is a major challenge to the idea of self-replicating RNA?
RNA's inherent stability
The simplicity of RNA's structure
The abundance of free nucleotides in early Earth environments
The complexity of RNA replication without enzymatic assistance
Which feature of some RNA molecules supports their potential role as early catalysts?
Linear, unfolded structure
Inability to bind to other molecules
Specific three-dimensional structures
Lack of chemical reactivity
Those nucleic acids which behave like enzymes are known as
Ribozymes
Pepzymes
Both (a) and (b)
Ribose
