TX Bar TX Barber Scientific Concepts 2

Question 1

Which type of bacteria is responsible for causing tuberculosis and is a key concern in barber sanitation protocols?

Accepted Answer

Mycobacterium tuberculosis

Answer

Mycobacterium tuberculosis is a rod-shaped (bacilli) bacterium that causes tuberculosis and is a primary concern in barbershop infection control.

Question 2

The process by which chemical disinfectants destroy the cell membrane of bacteria is called:

Accepted Answer

Lysis

Answer

Lysis is the destruction or dissolution of a cell's membrane, which is how many disinfectants kill bacterial organisms.

Question 3

What is the pH range of healthy human skin?

Accepted Answer

4.5–5.5

Answer

Healthy human skin has a slightly acidic pH of 4.5–5.5, known as the acid mantle, which protects against microbial growth.

Question 4

Which layer of the epidermis is responsible for producing new skin cells through mitosis?

Accepted Answer

Stratum germinativum

Answer

The stratum germinativum (basal layer) is the deepest epidermal layer where cells divide by mitosis to produce new skin cells.

Question 5

Quaternary ammonium compounds (quats) used as disinfectants in barbershops work primarily by:

Accepted Answer

Disrupting bacterial cell membranes through surfactant action

Answer

Quats are cationic surfactants that disrupt and penetrate bacterial cell membranes, causing leakage of cell contents and death.

(TX Bar) Texas Bar Exam Practice Test