Multiple Choice
In the context of organic chemistry, when are the first organic molecules thought to have existed?
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Intro to Organic Chemistry
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In the context of organic chemistry, are prions considered organisms?
A
No, because they are a type of virus.
B
Yes, because they are composed of proteins and can replicate.
C
No, because they lack cellular structure and metabolic processes.
D
Yes, because they can cause diseases in living organisms.
Verified step by step guidance1
Understand the nature of prions: Prions are infectious agents composed entirely of protein. They do not contain nucleic acids, which distinguishes them from viruses and other microorganisms.
Consider the characteristics of organisms: Organisms typically have cellular structures, metabolic processes, and the ability to reproduce independently. Prions lack these features.
Evaluate the replication process: Prions replicate by inducing abnormal folding of normal cellular proteins, particularly in the brain. This process does not involve traditional cellular replication mechanisms.
Assess the ability to cause disease: Prions are known to cause neurodegenerative diseases, such as Creutzfeldt-Jakob disease, by altering protein structures in host organisms.
Conclude based on cellular structure and metabolism: Prions are not considered organisms because they lack cellular structure and metabolic processes, which are essential characteristics of living organisms.
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