PBS

The cooling of body temperature after death is:

• algor mortis

• livor mortis

• rigor mortis

• pallor mortis

When a person dies, their body loses heat energy and the temperature of the corpse will decrease until an equilibrium is reached. This is known as ____.

• Rigor Mortis

• Livor Mortis

• Algor Mortis

• Decomposition

Which suspect is likely guilty?

• Suspect #1

• Suspect #2

• Suspect #3

Which is the primary purpose of using restriction enzymes in gel electrophoresis?

• It allows the strands of DNA to be cut into various lengths for testing

• It restricts the number of base pairs that can be tested in a sample

• It makes the testing simpler by moving the strands into the gel faster

• It charges the DNA strands

This is a(n) ___.

• organism

• tissue

• organ

• organ system

Tags

NGSS.HS-LS1-2

This is a(n) ___.

• organ

• organ system

• organism

• tissue

This is a(n) ___.

• organ

• cell

• tissue

• system

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

What is the primary function of Phosphate Buffered Saline (PBS) in biological experiments?

• To maintain pH balance in biological samples

• To act as a nutrient source for cell cultures

• To provide a high salt concentration for cell lysis

• To serve as a fixative for tissue samples

Which of the following components is NOT typically found in a standard PBS solution?

• Sodium chloride

• Potassium chloride

• Calcium chloride

• Sodium phosphate

Why is PBS often used as a washing buffer in cell culture experiments?

• It provides essential nutrients to cells

• It maintains osmotic balance without affecting cell viability

• It enhances cell growth and proliferation

• It acts as a strong detergent to remove debris