Biology · Biological Classification · NEET
A hypha is a single long, thin, thread-like structure of a fungus. The mycelium is the whole network made of many hyphae joined together. Simple rule: one thread = hypha, many threads together = mycelium. NEET often mixes these two words in options, so read carefully.
Coenocytic means the hypha is one continuous tube with NO cross walls inside. Because there are no walls, the cytoplasm flows freely and holds many nuclei (multinucleate). NCERT calls these 'continuous tubes filled with multinucleated cytoplasm'. Another word for coenocytic is aseptate (no septa).
Septate hyphae have cross walls called septa that divide the thread into cell-like parts. Coenocytic (aseptate) hyphae have no cross walls, so the whole tube is one open space with many nuclei. In short: septate = walls present; coenocytic = walls absent + multinucleate.
Coenocytic hyphae are multinucleate. Since there are no septa to separate the cytoplasm, all the nuclei share one continuous tube. This 'no wall + many nuclei' link is the exact point NEET tests, so remember them together.
Lower fungi like Phycomycetes (example: Rhizopus, Mucor, Albugo) usually have coenocytic (aseptate) hyphae. Higher fungi like Ascomycetes and Basidiomycetes have septate hyphae. NCERT does not force you to memorise long lists here, but Phycomycetes = aseptate is a safe NEET link.
Neither. Yeast is the exception among fungi. NCERT clearly says 'with the exception of yeasts which are unicellular, fungi are filamentous.' So yeast is unicellular and does NOT form long hyphae or a mycelium. NEET loves to trap students by calling yeast filamentous.
Which of the following statements is incorrect?
Try the real previous-year questions from this chapter — each with the answer and a full solution.
Mycelium is made of many hyphae. Each hypha is a long, slender, thread-like structure, and the whole network of these threads is called the mycelium.
Yes. Coenocytic means the hypha has no cross walls (no septa), so 'aseptate' is another name for it. It is a continuous multinucleate tube.
Because there are no septa (cross walls) to separate the cytoplasm into cells. The nuclei divide but the tube stays open, so all nuclei share one continuous cytoplasm.
Fungal cell walls are made of chitin and polysaccharides, as stated in NCERT. Chitin is sometimes called 'fungal cellulose'.
Phycomycetes (the lower fungi, e.g., Rhizopus, Mucor, Albugo) generally have aseptate or coenocytic mycelium, while higher fungi are septate.
