Overproduction of what substance is associated with biofilm production and mucoid phenotype of P. aeruginosa isolates found in cystic fibrosis patients?
a. Alginate
b. Exoenzyme T
c. Phospholipase C
d. Pyocyanin
A
Biofilm production related to the overproduction of alginate and the mucoid phenotype isolated from CF patients is associated with serious infections.
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The actual sites of gas exchange in the mammalian lung are termed
A. alveoli. B. lamellae. C. parabronchi. D. bronchi. E. epiglotti.
____ tissue allows the body to detect and respond to internal and external changes
a. Nervous b. Adipose c. Epithelial d. Connective e. Skeletal muscle
Most organ transplants fail because
a. of poor vascular connection between host and donor tissue. b. the migrating leukocytes attack the tissue adjacent to the transplant. c. of the activity of cytotoxic T cells. d. introduced tissues produce antibodies that cause a massive reaction. e. of all of these.
A homozygous plant has sepals of 30-cm flowers while another homozygote of the same species has 40-cm flowers. The F1 flowers are all 35 cm
In the F2, out of 600 plants the smallest flowers were 30 cm and the largest were 40cm; all the others were of intermediate sizes. If all the genes involved in flower size are additive, how many gene pairs are there?