Which Statement About Bacteria Is True

question 83

Multiple Choice

Which statement about bacteria is true?

• A) Gram-positive bacteria have a lot of peptidoglycan in their cell walls and stain blue to purple.
• B) Gram-negative bacteria have no peptidoglycan in their cell walls and stain blue to purple.
• C) Gram-positive bacteria weigh more than a gram.
• D) Gram-positive bacteria have relatively little peptidoglycan in their cell walls and stain pink to red.
• E) Gram-negative bacteria lack a cell membrane.

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Definitions:

Motor Units

A single motor neuron and all the muscle fibers it innervates, functioning as a single unit.

Sarcomere

The basic structural and functional unit of muscle fiber, responsible for muscle contraction.

Peak Contraction

The moment during a muscle exercise when the muscle is fully contracted, offering maximum tension.

H Zone

A region within the sarcomere of striated muscle fibers that becomes narrower during muscle contraction.