The Indicator Propyl Red Has K_a = 3

question 24

Multiple Choice

The indicator propyl red has K_a = 3.3 × 10^-6. What would be the approximate pH range over which it would change color?

• A) 3.5-5.5
• B) 4.5-6.5
• C) 5.5-7.5
• D) 6.5-8.5
• E) none of the above

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Definitions:

Seminiferous Tubules

These tubes contain spermatogenic cells and are located in the lobules of the testes.

Spermatogenic Cells

Cells located in the testis that go through the process of spermatogenesis to produce sperm.

Spermatids

Immature sperm before they develop their flagella (tails).

Vestibular Glands

Glands located near the vaginal opening that produce lubricating fluid; they play a key role in female sexual health and comfort.