Exam 3: Microscopy and Cell Structure

You perform a rapid strep test on the patient, which comes up positive. You tell her that she most likely has strep throat, caused by Streptococcus pyogenes. You prescribe penicillin for her, and tell her that this antibiotic is effective because it interferes with the synthesis of ________ by the pathogen.

Phagocytosis

The Gram stain and the endospore stain both use

The lab report also details the results of a negative stain performed on the bacteria in the urine sample, in which the background of the sample is stained, rather than the cells themselves. The report indicates that the cells have a clear halo around them, indicating the presence of a(n) ________. You explain to Petrus that this structure helps bacteria avoid ________, part of the immune response.

You are a microbiology student. You tell your roommate that Streptococcus pneumoniae

Which of the statements about immunofluorescence is NOT true?

The cell wall of Gram-negative organisms

Please select the MISMATCHED pair.

The capsule

Select the TRUE statement about the proton motive force.

A research laboratory is investigating environmental factors that would inhibit the growth of Archaea. One question they have is whether adding the antibiotic penicillin would be effective in controlling their growth. What do you think the outcome would be if they tried this?

As she is preparing to leave your office, the patient mentions that her brother had pneumonia a couple of years ago and that penicillin had not helped him. You ask her if she remembers the name of the organism causing her brother's illness and she tells you it was Mycoplasma something or other, that she can't quite remember. You tell her that the reason penicillin did not help her brother is that

The cytoplasmic membrane of both eukaryotes and prokaryotes functions to

Which of the following bacteria lack(s) a peptidoglycan cell wall?

The acid-fast stain

How do you explain to your friend why tetracycline treated her infection but penicillin did not?

Most solutes pass through the cytoplasmic membrane via

The proteins of bacteria that are involved in the movement of small molecules into the cell are called

When Petrus' grandmother's test results are sent to you, you discover that while her blood work is normal, her urine has Gram-negative bacilli in it. Based on this, you know that the cells are

Based on the Gram staining, you suspect that the patient has a ________ infection.