Question 1
Multiple choiceMedium1 markA filamentous eukaryote has a cell wall containing chitin. Microscopy of one tube shows many nuclei in a continuous length of cytoplasm, with no cross-walls. Which interpretation accounts for both observations?
Show answer and explanation
Answer: B. Chitin is characteristic of fungal cell walls. The absence of cross-walls and presence of many nuclei in continuous cytoplasm identify an aseptate fungal hypha.
A: associates a cell wall with plants but overlooks that plant walls contain cellulose, not chitin.
C: matches the multiple nuclei but overlooks that skeletal muscle cells have no cell wall.
D: identifies a fungus from the chitin wall but contradicts the observation that there are no cross-walls.
Remember: aseptate fungal hyphae contain multiple nuclei in continuous cytoplasm.