Question

Researchers studying the rigidity and flexibility of the cell envelope used chemotaxis to measure the ability of microbes to squeeze through tight spaces. e. coli, a gram-negative bacterium, was able to traverse narrower channels than b. subtilis, a gram-positive microbe, even though both cells are the same size when grown without restriction. e. coli has the more flexible cell envelope because:_____.a. lipopolysaccharide has no charge.
b. it has fewer flagella.
c. it has only a single membrane.
d. there is less structural carbohydrate.
e. there are fewer protein receptors.

Answer 1

Answer is (D)

Explanation:

• The microorganisms cell envelope is a complex multilayered structure that serves to shield these life forms from their unpredictable and regularly antagonistic condition.

• The cell envelopes of most microscopic organisms can be categorized as one of two significant gatherings. Gram-negative microorganisms such as E.Coli are encompassed by a meager peptidoglycan cell divider, which itself is encompassed by an external layer containing lipopolysaccharide.

• Gram-positive microscopic organisms do not have an external film however are encompassed by layers of peptidoglycan commonly thicker than is found in the Gram-negatives.