What is the main reason that lung cancer develops?
A. There is exposure to allergens.
B. The person's immune system is nonfunctional.
C. Mitotic growth factors replicate.
D. Two tumor suppressor genes undergo mutations.
Answer: D
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Which of the following fungi causes Valley fever in semi-arid regions of North American?
A. Cryptococcus neoformans B. Histoplasma capsulatum C. Coccidioides immitis D. Blastomyces dermatitidis
Burrowing deposit feeders favor ____ bottoms
a. muddy b. rocky c. sandy d. cobble e. pebble
________ molecules deliver amino acids to ribosomes during translation.
A. Ribosomal RNA (rRNA) B. Messenger RNA (mRNA) C. Transfer RNA (tRNA) D. Heterogeneous nuclear RNA (hnRNA)
An endotoxin is ________.
A. secreted by gram-positive organisms B. indicative of gram-negative bacterial infection C. secreted by pathogenic organisms D. indicative of fungal infections E. indicative of viral infections