Which substance builds up abnormally in Alzheimer's disease?
a. glycogen
b. fat
c. amyloid protein
d. glycolipids
e. aminoglycosides
C
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_____ was the first hominin to leave Africa and did so around _____ million years ago
A. Homo ergaster (H. erectus); 2 B. Ardipithecus ramidus; 4 C. Australopithecus afarensis; 3.2 D. H. neanderthalensis; 0.6 E. H. habilis; 1.7
Plants and streptophyte algae share a number of derived traits, except
A. plasmodesmata. B. sexual reproduction. C. chlorophyll a and b. D. a distinctive type of cytokinesis. E. cellulose-rich cell walls.
A nursing student develops a positive reaction to the tuberculin skin test. A history reveals possible exposure to patients with tuberculosis. A sputum sample is acid-fast negative. When asked for vaccination records, the student reports that childhood
vaccination records were lost when the family emigrated from a Southeast Asian country. What is the best explanation for the test results? A) The student has been infected with Mycobacterium tuberculosis. B) The student has been exposed to Mycobacterium tuberculosis. C) The student is not infected. D) The student has been exposed to Mycobacterium tuberculosis or was vaccinated with BCG vaccine. E) No conclusion is possible with the information provided.
Hydrolysis is a kind of _____ reaction that requires water.
A) rearrangement B) electron transfer C) condensation D) cleavage