Lipopolysaccharide is a major component of gram-negative outer membranes, can stimulate shock and fever, and is also referred to as multiple choice a. exotoxin b. teichoic acid c. endotoxin d. peptidoglycan

The answer is peptidoglycan

Explanation:

Peptidoglycan is a major component of bacteria walls. It consists of parallel heteropolysaccharides (different units of polysaccharides) cross-linked by short peptides.

- it majorly plays protective function in bacteria, thus it is also a site of attack for antibiotics.

- Lipopolysaccharides is also known as Peptidoglycan.

answer : third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol

explanation :

let us write down the given equations

equation 1 :

equation 2 :

equation 3 :

let us use hess's law to find out which 2 equations can be added to get the third equation.

let us reverse equation 2 and multiply it by 2. the new equation that we get is,

equation 4 :

let us add equation 1 & 4

the above equation is similar to equation 3 but has different value for dhrxn.

therefore third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol