Which of the following statements concerning red blood cells is ...

[Coya19@aol.com]

Which of the following statements concerning red blood cells is false?
 A) Red cells are biconcave discs.
  B) Red cells lack mitochondria.
  C) Red cells are about 18 m in diameter.
  D) Red cells are specialized for carrying oxygen.
  E) Red cells can form stacks called rouleaux.

Question 2

A cation that often acts as a cofactor for enzymes is
 A) sodium.
  B) potassium.
  C) calcium.
  D) magnesium.
  E) zinc.

[ErinKing]

Answer to Question 1

C

Answer to Question 2

D

[Coya19@aol.com]

Thanks for the timely response, appreciate it

[marict]

Excellent