Cell walls are not typically found in
protozoa.
algae.
fungi.
bacteria.
The Correct Answer is A
A. Protozoa: Protozoa are single-celled eukaryotic organisms that lack a rigid cell wall, allowing them greater flexibility and movement. Instead, they have a cell membrane that provides structural support.
B. Algae: Algae are photosynthetic organisms that typically have cell walls made of cellulose or other polysaccharides, which provide structure and protection.
C. Fungi: Fungi possess cell walls composed mainly of chitin, which gives them rigidity and structural strength, important for their survival.
D. Bacteria: Most bacteria have cell walls, usually made of peptidoglycan, which helps maintain their shape and protects them from osmotic pressure.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Mitochondria: Prokaryotic cells do not contain mitochondria. Instead, they generate energy through processes that occur across the plasma membrane. They are found exclusively in eukaryotic cells and are absent in prokaryotes.
B. Lysosomes: Lysosomes are membrane-bound organelles found only in eukaryotic cells. Prokaryotes lack these structures and instead rely on enzymes within the cytoplasm for breakdown processes.
C. Ribosomes: Ribosomes are present in prokaryotes and eukaryotes, serving as the site of protein synthesis. In prokaryotes, they are smaller (70S type) but functionally equivalent to those in eukaryotes.
D. All of the above: This is incorrect because prokaryotes do not contain mitochondria or lysosomes.
Correct Answer is False
Explanation
False: While many fungal infections in humans are superficial, such as athlete’s foot and ringworm that affect the skin, fungi are not limited to infecting only the skin. Fungi can cause a wide range of infections, from superficial skin infections to systemic diseases affecting the lungs, bloodstream, and internal organs, especially in immunocompromised individuals.
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