The IgG antibody is produced by:
a) T helper cells
b) Neutrophils
c) Dendritic cells
d) Plasma cells
Answer: d) Plasma cells
Biology & Microbiology
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The mammalian acrosome contains enzymes that ____
a. digest the zona pellucida b. digest the endometrium c. stimulate ovulation d. stimulate sperm motility e. inhibit premature ejaculation
Biology & Microbiology
What percent of Earth is dry land?
a. 10 percent b. 25 percent c. 30 percent d. 45 percent e. 50 percent
Biology & Microbiology
The average red blood cell lives for about ________ days
A) 100 B) 150 C) 120 D) 90
Biology & Microbiology
RNA is composed of four nucleotides, A, U, C, and G. Each codon is composed of three nucleotides. The number of possible codons is
A. 16. B. 4. C. 12. D. 64. E. 32.
Biology & Microbiology