PBS Modes of Transmission

What does PBS stand for in the context of modes of transmission?

• Phosphate Buffered Saline

• Public Broadcasting Service

• Personal Broadcasting System

• Primary Broadcasting Station

Tags

NGSS.HS-PS4-5

Which of the following is a primary mode of transmission for PBS in a laboratory setting?

• Airborne

• Direct contact

• Vector-borne

• Waterborne

In a laboratory, PBS is often used as a buffer. What is the main purpose of a buffer in scientific experiments?

• To maintain a constant pH

• To increase the reaction rate

• To act as a catalyst

• To change the color of the solution

Which of the following is NOT a characteristic of PBS?

• Isotonic

• Non-toxic

• Highly acidic

• Buffered

PBS is commonly used in cell culture. What is the main reason for using PBS in this context?

• To provide nutrients

• To wash cells

• To stain cells

• To fix cells

What is the typical pH range of PBS?

• 4.0 - 5.0

• 5.5 - 6.5

• 7.2 - 7.4

• 8.0 - 9.0

In the preparation of PBS, which of the following components is NOT typically included?

• Sodium chloride

• Potassium chloride

• Calcium chloride

• Sodium phosphate

PBS is often used in immunoassays. What is the role of PBS in these assays?

• To block non-specific binding

• To enhance signal detection

• To act as a substrate

• To precipitate proteins

Which of the following statements about PBS is true?

• PBS is used to lyse cells

• PBS is used to fix tissues

• PBS is used to wash cells

• PBS is used to stain proteins

What is the osmolarity of PBS typically adjusted to?

• 100 mOsm

• 200 mOsm

• 300 mOsm

• 400 mOsm