The hereditary material of most bacteria is contained in the:
Chromosome
Membrane
Flagella
Axial filament
The Correct Answer is A
A. Chromosome: Most bacteria carry their hereditary material in a single, circular chromosome (nucleoid).
B. Membrane: The cell membrane contains metabolic machinery but not the main hereditary DNA in bacteria.
C. Flagella: Flagella are motility structures and do not contain the bacterial genome.
D. Axial filament: Axial filaments (in spirochetes) are motility structures, not genetic material.
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Related Questions
Correct Answer is D
Explanation
A. Alga: Many algae are microscopic (microalgae) and are considered microorganisms.
B. Bacterium: Bacteria are classic microorganisms.
C. Protozoan: Protozoa are single-celled eukaryotes and are microorganisms.
D. Flea: Fleas are multicellular arthropods visible to the naked eye and are not classified as microorganisms.
Correct Answer is B
Explanation
A. Collar: T-even bacteriophages (e.g., T4) have a collar/neck region between the head and tail.
B. Spores: Spores are produced by bacteria (endospores) or fungi, not part of a bacteriophage’s anatomy.
C. Tail pins: T-even phages have a baseplate with tail pins/spikes used for attachment.
D. None of the above: This option does not apply because spores are not part of a bacteriophage.
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