Log in
Sign up for FREE
arrow_back
Library
The RNA World Hypothesis Quiz
By Jessica Valverde
star
star
star
star
star
Share
share
Last updated 17 days ago
10 questions
Add this activity
Required
1
Required
1
Required
1
Required
1
Required
1
Required
1
Required
1
Required
1
Required
1
Required
1
Question 1
1.
According to the RNA world hypothesis, what role did RNA likely play in the origin of life on Earth?
RNA was created by the first living organisms
RNA served as a protective barrier for early cells
RNA chains were among the first self-replicating molecules that could evolve
RNA prevented harmful chemicals from entering early cells
Question 2
2.
How do the four nucleotide bases in RNA (A, C, U, and G) demonstrate selective pairing?
G pairs with C, and A pairs with U through selective attraction
All bases pair with all other bases equally
Only A and U bases can form pairs
Bases pair randomly without any preference
Question 3
3.
In the laboratory experiment at Simon Fraser University, what did researchers discover about random RNA chains?
None of the random chains had any useful function
Random chains could only replicate but not perform chemical reactions
All random chains were equally efficient at building nucleotides
Some random chains could build nucleotides, though not very efficiently at first
Question 4
4.
What is a ribozyme, and how does its function relate to its structure?
A ribozyme is a type of DNA that only stores genetic information
A ribozyme is a folded RNA chain that performs chemical reactions, with its specific function determined by its specific shape
A ribozyme is a nucleotide that cannot fold or change shape
A ribozyme is a protein that helps RNA replicate
Question 5
5.
Why is the ability of RNA to replicate with occasional mutations important for the RNA world hypothesis?
Mutations prevent RNA from evolving
Mutations only make RNA weaker and less functional
Mutations and replication allow true evolution through natural selection to occur
Replication without mutations would be more beneficial for evolution
Question 6
6.
What does the video suggest about the relationship between RNA chains and early living cells?
RNA and cells developed completely independently
Cells existed before RNA chains formed
Cells prevented RNA from replicating
Living cells can be thought of as survival machines or houses for RNA to live inside
Question 7
7.
According to the video, what is one major unsolved problem with the RNA world hypothesis?
Researchers cannot explain how backbone binding could function in nature without special enzymes or lab techniques
The video states that all problems with the hypothesis have been solved
Scientists don't know what RNA stands for
RNA cannot form base pairs in natural environments
Question 8
8.
How did the PCR technique help researchers demonstrate the evolution of ribozymes in the laboratory?
PCR destroyed inefficient ribozymes
PCR allowed researchers to quickly replicate successful RNA chains with slight random mutations across multiple generations
PCR proved that evolution cannot happen in laboratories
PCR prevented mutations from occurring in RNA chains
Question 9
9.
What can be inferred about why a ribozyme that builds nucleotides would have a survival advantage?
It would not provide any advantage
It would have fewer competitors
It would have access to more free nucleotides than rival chains, allowing it to replicate more often
It would prevent other RNA chains from replicating
Question 10
10.
How does the process of RNA self-folding differ from RNA replication?
Self-folding requires more nucleotides than replication
Self-folding and replication are identical processes
Self-folding only happens in laboratories
Replication requires base pairing with free nucleotides and backbone bonding, while self-folding occurs when RNA base pairs with itself in the absence of free nucleotides