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.
Related Questions
Which prebiotic condition would have MOST significantly hindered the formation of stable RNA polymers in the early Earth environment?
An abundance of organic molecules like amino acids and nucleotides
The presence of clay minerals that can catalyze RNA polymerization
High concentrations of metal ions that catalyze RNA hydrolysis
Alternating cycles of wetting and drying
If you were to analyze the RNA content of a human liver cell, which type of RNA would you expect to find in the highest concentration?
mRNA
tRNA
rRNA
miRNA
Which of the following is NOT a reason why rRNA is the most abundant RNA in animal cells?
It is a structural component of ribosomes.
It is required for protein synthesis.
It carries the genetic code from DNA to the ribosome.
Multiple copies of rRNA genes exist in the genome.
Which of the following is considered a potential precursor to RNA in the RNA world hypothesis?
Deoxyribonucleic acid (DNA)
Proteins
Peptide nucleic acid (PNA)
Lipids
Which of these is NOT a supporting argument for the RNA world hypothesis?
RNA's ability to self-replicate
RNA's catalytic properties
The existence of ribozymes
DNA's higher stability
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
Which molecule is hypothesized to have been the primary genetic material in the RNA world?
DNA
RNA
Proteins
Lipids
If the RNA world hypothesis is correct, which of the following would be the MOST likely scenario for the emergence of DNA?
DNA spontaneously arose independent of RNA and eventually outcompeted RNA.
Proteins evolved first and then catalyzed the formation of DNA from RNA.
RNA developed the ability to synthesize deoxyribonucleotides and polymerize them, eventually leading to DNA genomes.
Extraterrestrial DNA was introduced to Earth and replaced RNA.
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.
Select the correct match:
G. Mendel - Transformation
Ribozyme - Nucleic acid
T.H. Morgan - Transduction
Recessive parent - Dihybrid cross
