The Following Is Correct with Respect to Streptococcus Species

question 17

Multiple Choice

The following is correct with respect to Streptococcus species:

• A) They grow as chains, as a result of binary fission in one direction.
• B) They are aerotolerant fermenters.
• C) Some species cause tooth decay, as they ferment food residues and lower pH to 4.
• D) All of the above.
• E) None of the above.

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Definitions:

ATP

Adenosine triphosphate, a molecule that provides energy for many processes in living cells by being converted to ADP (adenosine diphosphate).

NADPH

Nicotinamide adenine dinucleotide phosphate, a coenzyme involved in anabolic reactions, such as lipid and nucleic acid synthesis, acting as a reducing agent.

Autotrophs

Organisms capable of producing their own food through photosynthesis or chemosynthesis, utilizing sunlight or chemical reactions.

Heterotrophs

Organisms that obtain their energy by consuming other living or deceased organisms, as they cannot synthesize their own food.