UExcel Microbiology Test 1

Question 1

Which of the structures below contains enzyme and antibiotic resistance genes?

Accepted Answer

Plasmid

Answer

Explanation:
Plasmids are DNA molecules that are present in bacteria and other microscopic creatures. Plasmids are physically distinct from chromosomal DNA and multiply in their own right.

Question 2

Which of the following statements about endotoxins is false?

Accepted Answer

Endotoxins are secreted from cells.

Answer

Explanation:
Endotoxins are lipopolysaccharides found in Gram-negative bacteria's cell walls that can cause inflammation and fever in higher organisms as an immunological response. Endotoxic reactions can cause anaphylactic shock and death in patients.

Question 3

Which of the following bacteria is incorrectly matched to the proper isolation media?

Accepted Answer

Neisseria gonorrhoeae – Pink colonies media

Answer

The correct answer:
Neisseria gonorrhoeae – Pink colonies media

Question 4

Which of the following structures is the most crucial in microbial cell attachment?

Accepted Answer

Glycocalix

Answer

Explanation:
The glycocalyx, also known as the pericellular matrix, is a glycoprotein and glycolipid layer that protects bacteria, epithelial cells, and other cells' cell membranes. Martinez-Palomo identified the glycocalyx, a cell covering seen in animal cells, in 1970.

Question 5

Which of the diseases and germs listed below are mismatched?

Accepted Answer

Lyme disease – Yersinia pestis

Answer

The correct answer:
Lyme disease – Yersinia pestis

UExcel Practice Test

UExcel Practice Test

UExcel Microbiology Test 1