In the Catalase test, which of the following is the product detected?

A. Hydrogen peroxide
B. Freshly produced oxygen
C. Water and freshly produced oxygen
D. Water


Ans: B. Freshly produced oxygen

Biology & Microbiology

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Which of the following intestinal protozoa has no cyst stage, ranges from 9 to 12 µm in diameter, and has two nuclei in 60% of clinical specimens?

a. Giardia duodenalis b. Chilomastix mesnili c. Dientamoeba fragilis d. Enteromonas hominis

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What are lysosomes, and how do they work in the cell?

What will be an ideal response?

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What survival advantage does a seed have that has enabled the seed plants to be the most successful of all plants?

What will be an ideal response?

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The electronegativity of nitrogen (N) is 3.0, while the electronegativity of hydrogen (H) is 2.1. Knowing this, consider how the electrons will be shared in ammonia (NH3 ). What do you predict about the polarity of ammonia?

A. Each H atom has a partial positive charge B. The N atom has a partial positive charge C. Each H atom has a partial negative charge D. The N atom has a strong positive charge

Biology & Microbiology