Question

Which statement best describes respiration in spiral-shaped bacteria?(1 point)
Responses

Spiral-shaped bacteria are generally aerobic, but a subset of the group uses anaerobic respiration.
Spiral-shaped bacteria are generally aerobic, but a subset of the group uses anaerobic respiration.

Spiral-shaped bacteria only utilize anaerobic respiration.
Spiral-shaped bacteria only utilize anaerobic respiration.

Spiral-shaped bacteria are facultative anaerobes but can switch to aerobic respiration when needed.
Spiral-shaped bacteria are facultative anaerobes but can switch to aerobic respiration when needed.

Spiral-shaped bacteria only utilize aerobic respiration.

Answer 1

Your teacher gives you an unknown bacterium to observe. Select the method that would help you determine whether the bacterium is a chemotroph.(1 point)
Responses

growing the bacterium in a sulfur solution to see if it breaks the inorganic molecules down
growing the bacterium in a sulfur solution to see if it breaks the inorganic molecules down

growing the bacterium in an agar tube filled with protein to see if it breaks the organic molecules down
growing the bacterium in an agar tube filled with protein to see if it breaks the organic molecules down

exposing the bacterium to carbon dioxide to see if it fixes carbon
exposing the bacterium to carbon dioxide to see if it fixes carbon

exposing the bacterium to direct sunlight to see if it converts light to chemical energy
exposing the bacterium to direct sunlight to see if it converts light to chemical energy

Answer 2

The statement that best describes respiration in spiral-shaped bacteria is:

**Spiral-shaped bacteria are generally aerobic, but a subset of the group uses anaerobic respiration.**

This reflects the diversity among spiral-shaped bacteria, where many are aerobes, but some can also perform anaerobic respiration depending on their environment.