With respect to these pathogens, it would be reasonable to state that:
- Z is a virus - VCE - SSCE Biology - Question 17 - 2014 - Paper 1
Question 17
With respect to these pathogens, it would be reasonable to state that:
- Z is a virus.
- both W and X are cellular.
- Y reproduces by binary fission.
- X reproduces... show full transcript
Worked Solution & Example Answer:With respect to these pathogens, it would be reasonable to state that:
- Z is a virus - VCE - SSCE Biology - Question 17 - 2014 - Paper 1
Step 1
Z is a virus.
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Answer
Pathogen Z exhibits characteristics typical of viruses, such as lacking cellular structure, as indicated by its small size of approximately 5 nm. Viruses are generally composed of nucleic acid encased in a protein coat and do not have cellular machinery to replicate themselves.
Step 2
both W and X are cellular.
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Answer
Both Pathogen W and Pathogen X are larger than typical virus particles and exhibit cellular characteristics. Pathogen W has a defined cell wall, and Pathogen X, while smaller than W, demonstrates a structure indicative of a cellular organism, as it possesses nucleic acids and other cellular components.
Step 3
Y reproduces by binary fission.
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Answer
Pathogen Y shows characteristics of prokaryotic organisms, such as bacteria, which commonly reproduce asexually through binary fission. This process involves the division of a single organism into two identical daughter cells.
Step 4
X reproduces by invading host-cell DNA.
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Pathogen X, being a cellular organism that can invade host cells, likely utilizes the host's cellular machinery for reproduction, similar to some parasitic bacteria or eukaryotic cells.
