Which of the following cellular proteins is NOT a part of the epidermal growth factor (EGF)/EGF receptor signaling pathway that leads to cell division?
A. GRB2, Sos, and Ras
B. Raf-1
C. MAPK
D. Myc and Fos-Jun
E. MutS
E. MutS
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Although a useful test in the past, the particle agglutination assay for the detection of H. influenzae, type b, capsular polysaccharide antigen is no longer reliable because of:
a. insufficiently high concentration of the organisms in clinical infections. b. a lack of sensitivity and specificity of the test procedure. c. the frequent use of antimicrobial therapy before collecting the specimen. d. the increased use of H. influenzae, type b, vaccination.
Calculate L1, given n1 = 100, n2 = 50, and n3 = 10
A) 90 B) 50 C) 75 D) 10
Stomatal guard cells swell to create a stomata in response to ________.
A. The loss of Na+ and Cl- ions, allowing water to flow into the cells by osmosis B. The active transport of water into stomatal guard cells C. The outward flow of K+ ions, causing water to flow out of the cells by osmosis D. The inward flow of K+ ions, causing water to flow into the cells by osmosis E. Wilting in the leaf, which stimulates the uptake of water by stomatal guard cells
Which wavelengths are absorbed by chloroplasts during photosynthesis?
a) green b) yellow c) orange d) All of the above are correct. e) Only b) and c) are correct.