Multiple Choice
In the context of the history of genetics, what is the term for the ancestor who stands at the top of a common genealogy?
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1. Introduction to Genetics
History of Genetics
Multiple Choice
In the context of the RNA world hypothesis about the origin of life, which molecule is proposed to have evolved first as both a carrier of genetic information and a catalyst?
A
Protein
B
RNA
C
DNA
D
Carbohydrate (polysaccharide)
Verified step by step guidance1
Understand the RNA world hypothesis, which suggests that early life forms relied on RNA molecules before DNA and proteins became predominant.
Recognize that RNA is unique because it can both store genetic information and catalyze chemical reactions, unlike proteins or DNA alone.
Recall that proteins primarily serve as catalysts but do not carry genetic information, while DNA stores genetic information but does not catalyze reactions.
Note that carbohydrates (polysaccharides) mainly serve structural and energy storage roles and are not involved in genetic information storage or catalysis.
Conclude that RNA is proposed to have evolved first as both a carrier of genetic information and a catalyst, according to the RNA world hypothesis.
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