Which of the following statements is true?

A. The cell envelope material of Gram-positive bacteria contains endotoxin activity.

B. The periplasmic space contains the peptidoglycan layer of Gram-negative bacteria.

C. The structure/composition of the membrane lipids of Archaea are the same as in bacteria.

D. In comparing the cell envelopes of Gram-negative bacteria and a Gram-positive bacteria, it would be accurate to say that Gram-positives have much more lipid material in their cell envelope than a Gram-negative.

E. All the above are false statements, none are true.

Question

Biology

Dawson Morrow

19 July, 19:40

Which of the following statements is true?

A. The cell envelope material of Gram-positive bacteria contains endotoxin activity.

B. The periplasmic space contains the peptidoglycan layer of Gram-negative bacteria.

C. The structure/composition of the membrane lipids of Archaea are the same as in bacteria.

D. In comparing the cell envelopes of Gram-negative bacteria and a Gram-positive bacteria, it would be accurate to say that Gram-positives have much more lipid material in their cell envelope than a Gram-negative.

E. All the above are false statements, none are true.

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Answers (1)

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Blast · Answer 1

B. The periplasmic space contains the peptidoglycan layer of Gram-negative bacteria.

Explanation:

Periplasma is the compartment that surrounds the cytoplasm in Gram negative bacteria. It is comprised between the plasma membrane (which is inward) and the outer membrane of the gram negative, on the outside.

This periplasmic space contains the peptidoglycan layer and proteins that are responsible for receiving extracellular signals, among other functions.

The high concentration of peptidoglycan causes this space to be in a gel-like state.