What Are Scotochromogens

question 20

Multiple Choice

What are scotochromogens?

• A) Species that produce carotene pigment upon exposure to light
• B) Species that produce pigment in the light or the dark
• C) Species whose colonies remain buff colored after exposure to light
• D) Species whose colonies fluoresce under ultraviolet light

Recognize the association between specific bacteria and diseases such as periodontitis and atherosclerosis.

Distinguish between self and non-self entities using T cell receptors and Major Histocompatibility Complex (MHC) markers.

Understand the targets and mechanisms of drugs used in AIDS treatment.

Know the primary immunoglobulins present in gland secretions and their functions.

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Definitions:

Recessive Disorder

A genetic disorder that requires an individual to inherit two copies of a defective gene, one from each parent, for the condition to develop.

Sickle Cell Anemia

A genetic blood disorder characterized by red blood cells that assume an abnormal, rigid, sickle shape, leading to various health complications such as pain and anemia.

Tay-Sach's Disease

A hereditary disorder affecting infants, characterized by the absence of a vital enzyme, resulting in the accumulation of fatty substances in the nervous system, leading to death usually by the age of four.

Down Syndrome

A genetic disorder caused by the presence of all or part of a third copy of chromosome 21, characterized by developmental and intellectual delays.