Answer:
Letter d. Evola virus could not produce an exotoxin
Explanation:
Viruses are acellular particles carrying genetic material only for their reproduction. None of the viruses produces toxins, viruses atack by altering the normal function of the host cell. In the other hand, bacteria involve in alimentary infections like <em>E. coli, S. aureus</em> and <em>C. botulinum</em> produce exotoxins to attack the host cells to colonize and start an infection. The exotoxin is too potent that alter the function of the intestinal cells before the immune system recognize the bacteria.
Answer:
B) mutations
Explanation:
Few mutations also take place during the DNA replication process.
However, DNA polymerase also has proofreading property by which it checks for the mismatch bases and corrects it.
Answer:
B
Explanation:
I'm pretty certain the answer is B. I really hope this help's you! Have a lovely day.
Answer/Explanation:
Telomeres are structures found at the end of the chromosomes. They are protective structures made of repetitive sequences. They protect chromosomes from damage or fusing with other chromosomes. As the cell divides and divides, telomeres shorten. When they reach a critical point, the cell stops dividing, and might even undergo apoptosis (die).
Telomerase is an enzyme that adds nucleotides to telomeres to prevent their shortening. If all our cells expressed telomerase, the telomeres would never reach the critical short length to stop cell division. Therefore, our cells would keep dividing forever!