MRS Mold Biology & Identification 3

Question 1

Which mycotoxin produced by Aspergillus flavus is classified as a Group 1 human carcinogen?

Accepted Answer

Aflatoxin B1

Answer

Aflatoxin B1, produced by Aspergillus flavus and A. parasiticus, is classified by IARC as a Group 1 human carcinogen, primarily affecting the liver.

Question 2

The term 'dematiaceous' refers to molds that:

Accepted Answer

Contain melanin, appearing dark brown to black

Answer

Dematiaceous molds contain melanin pigments in their cell walls and hyphae, giving colonies a dark brown, olive, or black appearance.

Question 3

Which of the following is NOT a common substrate for Stachybotrys chartarum growth?

Accepted Answer

Concrete block walls

Answer

Stachybotrys chartarum requires cellulose-rich materials and cannot colonize concrete, which lacks the organic substrate it needs.

Question 4

In mold taxonomy, what does 'anamorph' refer to?

Accepted Answer

The asexual reproductive stage of a fungus

Answer

Anamorph refers to the asexual (imperfect) stage of a fungus, while teleomorph refers to the sexual (perfect) stage.

Question 5

Which physical characteristic of mold spores most affects their ability to remain airborne for extended periods?

Accepted Answer

Aerodynamic diameter and density

Answer

Spores with small aerodynamic diameters (1–5 microns) and low density remain suspended in air longer and can penetrate deeper into the respiratory tract.

(MRS) Mold Remediation Specialist Practice Test

(MRS) Mold Remediation Specialist Practice Test

MRS Mold Biology & Identification 3