Quiz 2-2023

Which of the following does not kill endospores?

• Autoclaving

• Incineration

• Pasteurization

• Hot-air sterilization

• All of the answers

Which of these disinfectants does not act by disrupting the plasma membrane?

• Quats

• Phenol

• Halogens

• Phenolics

• Biguanides

A classmate is trying to determine how a disinfectant might kill cells.

You observed that when he spilled the disinfectant in your reduced litmus milk, the litmus turned blue again. What do you suggest to your classmate?

• He takes his work away from yours.

• The disinfectant might denature proteins.

• The disinfectant might oxidize molecules.

• The disinfectant might inhibit protein synthesis.

• The disinfectant might inhibit cell wall synthesis.

Bergey’s Manual of Systematic Bacteriology differs from Bergey’s Manual of Determinative Bacteriology in the way that the former:

• Groups bacteria into species.

• Groups bacteria according to phylogenetic relationships.

• Groups bacteria according to pathogenic properties.

• Groups bacteria into 19 species.

• All of the answers

Which of the following is used to classify organisms into the Kingdom Fungi?

• Unicellular; lacking cell wall; eukaryotic

• Unicellular; possess cell wall; prokaryotic

• Absorptive; possess cell wall; eukaryotic

• Ability to photosynthesize; possess a cell wall

• Ingestive; lacking cell wall; multicellular; prokaryotic

What would a microbiologist expect to find with Gram-stained bacteria that live in the human intestine?

• Gram-positive cocci.

• Gram-negative rods.

• Gram-negative, nitrogen-fixing bacteria.

• Gram-positive, endospore-forming rods.

• All of the answers

Which of the following is an intracellular parasite?

• Bacillus

• Plasmodium

• Streptococcus

• Mycobacterium

• Staphylococcus

Why Legionella was classified with the pseudomonads when it was first discovered.

• It is a pathogen.

• It is found in water.

• It is not accessible to culture.

• It is an aerobic gram-negative rod.

• None of the answers

Which of the following statements about yeasts are true?

i. Yeasts are fungi.

ii. All yeasts are dimorphic.

iii. All yeasts are pathogenic.

iv. Yeasts can form pseudohyphae.

v. Yeasts are facultatively anaerobic.

vi. Yeasts reproduce asexually by budding.

• i, ii,  and vi

• ii, iii, and iv

• i, ii, iii, and vi

• ii, iii, iv, and v

• iii, iv, v and vi

The ability of a virus to infect an organism is regulated by

• The type of cells.

• The host species.

• The availability of an attachment site.

• Cell factors necessary for viral replication.

• All of the answers