MIC 301 Exam 2 Questions With 100% Verified Answers

MIC 301 Exam 2 Questions With 100% Verified Answers 1. For a biologist, what is the specific definition of 'Commensalism'? a. Close interaction between two organisms. b. Close interaction between two organisms in which both benefit. c. Close interaction between two organisms in which one benefits and one suffers. d. Close interaction between two organisms in which only one benefits. - CORRECT ANS-d. Close interaction between two organisms in which only one benefits. 2. Why was it argued by your Professor that Vibrio cholera should be considered a 'nastier' human pathogen than Mycobacterium tuberculosis? a. V. cholera is a Gram negative whereas M. tuberculosis is a Gram positive. b. Cholera is an intestinal disease whereas tuberculosis is a disease of the lungs. c. V. cholera causes disease in just about everyone it infects whereas M. tuberculosis is 'quiet' most of the time in most individuals. d. Infection by V. cholera occurs by ingesting contaminated water whereas M. tuberculosis is transmitted directly between humans via aerosols. - CORRECT ANS-c. V. cholera causes disease in just about everyone it infects whereas M. tuberculosis is 'quiet' most of the time in most individuals. 3. All of the following statements about Chlamydia trachomatis are true EXCEPT: a. C. trachomatis exists in two forms: an infectious elementary body (EB) and a reticulate body (RB). b. EB can only grow outside of animal cells. c. RB can only grow inside animal cells. d. In females C. trachomatis infection is often asymptomatic. - CORRECT ANS-b. EB can only grow outside of animal cells. 4. In the late 1800s, it was first proposed that mitochondria could be related to bacteria. This was based on: a. The morphological similarity between the two. b. That mitochondria have bacterial-like DNA. c. That mitochondria have their own ribosomes. d. That mitochondria is where ATP is made. - CORRECT ANS-a. The morphological similarity between the two. 5. All of the following statements about the mitochondrial chromosome are true EXCEPT: a. It is circular. b. It is approximately the same size as bacterial chromosomes. c. Many of its genes encode components of the electron transport system. d. It is arguably the strongest piece of evidence that mitochondria and bacteria are evolutionarily related. - CORRECT ANS-b. It is approximately the same size as bacterial chromosomes. 6. Mitochondrial-derived _____ activate an immune response that is similar to immune responses activated by bacterial-derived _____.