Multiple Choice
All viruses are made up of two essential components. These components are:
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1. Introduction to Microbiology
Acellular Infectious Agents: Viruses, Viroids & Prions
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Which structure is present in viruses but not in cellular organisms?
A
Capsid
B
Cell membrane
C
Nucleus
D
Ribosome
Verified step by step guidance1
Step 1: Understand the basic structures of viruses and cellular organisms. Viruses are acellular entities that require a host to replicate, while cellular organisms have complex cellular structures.
Step 2: Identify the structures listed in the problem: Capsid, Cell membrane, Nucleus, and Ribosome.
Step 3: Recall that cellular organisms typically have a cell membrane, nucleus (in eukaryotes), and ribosomes for protein synthesis.
Step 4: Recognize that viruses do not have a cell membrane, nucleus, or ribosomes, but they do have a protein coat called a capsid that encloses their genetic material.
Step 5: Conclude that the capsid is unique to viruses and is not found in cellular organisms, making it the correct answer.
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