What is the difference between gram positive and gram negative

Asked by admin @ 29/10/2021 in Biology viewed by 350 People

What is the difference between Gram-positive and Gram-negative bacteria? A) Gram-positive bacteria are surrounded by a single membrane, whereas Gram-negative bacteria are surrounded by a double membrane, with an outer membrane that is porous to ions and small molecules. B) Gram-positive bacteria are motile and Gram-negative bacteria are not. C) Gram-positive bacteria make gramicidin A and Gram-negative bacteria do not. D) Gram-positive bacteria are surrounded by a single membrane, while Gram-negative bacteria have a dual-membrane system with an inner membrane that is porous to small molecules and ions.

Answered by admin @ 29/10/2021

Answer:

Gram-positive bacteria are surrounded by a single membrane, whereas Gram-negative bacteria are surrounded by a double membrane, with an outer membrane that is porous to ions and small molecules.

Explanation:

Cell wall structure differs in Gram-positive and Gram-negative bacteria. The Gram-positive bacterial cell wall is made up of a single homogenous layer in peptidoglycan. It is 20-80 nm thick and is present outside of the plasma membrane.

The cell wall in Gram-negative bacteria consists of a 2-7 nm thick peptidoglycan layer covered by 7-8 nm thick outer membrane. The porin proteins of the outer membrane for channels across it to allow the small molecules to enter the periplasm.

What is the difference between gram positive and gram negative

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