Which of the following traits are associated with Actinomycetes
(A). Presence of peptidoglycan in the cell wall
(B). Low G+C content in the DNA
(C). Aerial mycelia bearing asexual spores
(D). Presence of 70S ribosomes
Choose the correct answer from the options given below:
(A). Presence of peptidoglycan in the cell wall
(B). Low G+C content in the DNA
(C). Aerial mycelia bearing asexual spores
(D). Presence of 70S ribosomes
Choose the correct answer from the options given below:
Show Hint
- (A), (B) and (D) only.
- (A), (C) and (D) only.
- (B), (C) and (D) only.
- (A), (B) and (C) only.
The Correct Option is B
Solution and Explanation
Actinomycetes (belonging to the phylum Actinomycetota) are a diverse group of Gram-positive bacteria that display filamentous growth patterns resembling fungal hyphae.
Step 2: Detailed Explanation:
Let us evaluate each of the given biological traits in relation to Actinomycetes:
(A) is associated with Actinomycetes.
As bacteria, their cell walls contain peptidoglycan (murein), which distinguishes them from eukaryotic fungi.
(B) is not associated with Actinomycetes.
Actinomycetes are characterized by a high G+C content in their genomic DNA, typically ranging from 55% to over 75%, placing them in the class of high-GC Gram-positive bacteria.
(C) is associated with Actinomycetes.
They produce branching vegetative and aerial mycelia, and the aerial hyphae differentiate to bear chains of asexual spores (conidiospores or sporangiospores) for dispersal.
(D) is associated with Actinomycetes.
Because they are prokaryotes, they possess bacterial 70S ribosomes in their cytoplasm.
Comparing these points, traits (A), (C), and (D) are correct, while trait (B) is incorrect.
Step 3: Final Answer:
Therefore, the traits associated with Actinomycetes are (A), (C), and (D), which corresponds to option (B).
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