In which of the following stages would a human cell not be diploid?
a. prophase of mitosis
b. telophase of mitosis
c. metaphase of mitosis I
d. prophase of meiosis II
Answer: d. prophase of meiosis II
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Fifty-million sperm were examined for mutations in a specific gene and 100 mutations were found. What was the mutation rate for this gene?
A) 5 × 10?6 B) 50 × 10?6 C) 2 × 10?6 D) 2 × 10?5 E) 5 × 10?5
Which plasma membrane component can be either found on its surface or embedded in the membrane structure?
a) cholesterol b) protein c) carbohydrate d) phospholipid
What is the function of a Toll-like receptor?
A. to bind to surface molecules present on phagocytes B. to bind to cytokines C. to bind to surface molecules present on pathogens D. to facilitate the extravasation of phagocytes
________ anaphylaxis is referred to as an atopic reaction.
Fill in the blank(s) with the appropriate word(s).