The function of bacterial endospores is
conversion of gaseous nitrogen to a usable form for plants.
reproduction and growth.
protection of genetic material during harsh conditions.
storage of excess cell materials.
as sites for photosynthesis
The Correct Answer is C
A. Conversion of gaseous nitrogen to a usable form for plants: Nitrogen fixation is carried out by certain bacteria like Rhizobium and Azotobacter, not by endospores. Endospores do not participate in nitrogen metabolism.
B. Reproduction and growth: Endospores are not reproductive structures. They are dormant forms that ensure survival during extreme conditions, unlike spores in fungi which serve reproductive roles.
C. Protection of genetic material during harsh conditions: Endospores safeguard bacterial DNA when exposed to heat, radiation, desiccation, or chemicals. This survival mechanism allows bacteria to persist until conditions become favorable again.
D. Storage of excess cell materials: Storage granules or inclusion bodies serve this purpose in bacteria, whereas endospores are specialized for endurance, not material storage.
E. As sites for photosynthesis: Photosynthesis occurs in thylakoid membranes of cyanobacteria, not in endospores. Endospores remain metabolically inactive until germination.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Enzymes are made of protein: Enzymes are primarily composed of protein molecules that fold into specific three-dimensional shapes, enabling them to catalyze biochemical reactions efficiently.
B. Enzymes can be denatured: Enzymes can lose their functional shape, or become denatured, when exposed to extreme temperatures, pH levels, or chemical agents, which impairs their catalytic activity.
C. Enzymes can only work one time: Enzymes are not used up in reactions; they can catalyze the same type of reaction repeatedly without being consumed.
D. Enzymes can be found in biological organisms: Enzymes are naturally present in all living organisms, where they facilitate essential metabolic and physiological processes.
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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