Which of the following types of bacterial toxins is associated exclusively with gram-negative bacteria? a. cytotoxinb. neurotoxinc. both cytotoxin and neurotoxind. both endotoxin and cytotoxine. endotoxin

E- Endotoxins

Explanation: Toxins are produced by microorganisms such as bacteria that causes infetion to their hosts. They work by manipulating cell functions and destroy tissues. These toxins are part of the normal functioning and bacterial life cycle, they are not primarily a survival or fighting mechanism.

Exotoxins are produced by bacteria and cause damage to host by disrupting its metabolism.

Endotoxins are produced by gram negative bacteria as its major outer membrane component and protect bacterial membrane from chemical attacks

Nuerotoxins disrupts nerve tissues in which exposure to results in symptoms such as twitching and loss of coordination. They are produced but are not limited to bacteria. Example of this toxin is the well known Botulinum toxin.

Cytotoxins are chemicals produced during a normal microbial metabolic process and are not limited to bacteria.

Therefore the answer is option E.

9.9 years

a = p(1 + rt) . . account balance after time t at rate r starting with principal p

3000 = 2500(1 + 0.0202t) . . filling in the given numbers

1.2 = 1 + 0.0202t . . divide by 2500

0.2 = 0.0202t . . . subtract 1

0.2/0.0202 = t ≈ 9.901

it will take about 9.9 years for the account balance to reach $3000.