Which cells secrete epinephrine?
a) ? -cells in the pancreas
b) medulla cells in the adrenal gland
c) ? -cells in the pancreas
d) cortical cells in the adrenal gland
e) ? -cells in the pancreas
Ans: b) medulla cells in the adrenal gland
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Which of the following statements about methyl-directed mismatch repair systems is FALSE?
A. Methyl-directed mismatch repair systems require the concerted actions of several proteins. B. Methyl-directed mismatch repair systems require exonucleases. C. Methyl-directed mismatch repair systems are most often used to correct pyrimidine dimers. D. Methyl-directed mismatch repair systems exist in all species. E. Methyl-directed mismatch repair systems require incorrectly matched base pairs in the DNA.
Which dematiaceous fungus causes a condition known as chromoblastomycosis?
a. P. boydii b. Hortaea werneckii c. Phialophora spp. d. Exophiala jeanselmei
Clams and oysters are:A
detritivores. B. herbivores C. omnivores. D. carnivores. E. filter feeders
In yolk-rich eggs, cytoplasmic localization of the yolk results in which of the following?
A. Yolk proteins concentrated at the animal pole B. More cuts in the yolky part C. Genetic material confined to the nucleus D. Fewer cuts during cleavage in the vegetal pole E. Reduced cytoplasm from the sperm