Hexokinase is an enzyme involved in cellular respiration and its substrate is glucose. Considering this information, hexokinase must be located
A. in the lumen of the stomach.
B. in the lumen of the small intestine.
C. inside the mitochondria of cells.
D. in the cytosol of cells.
D
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Urine leaves the renal pelvis and enters the ureter because of
A) contractions of the muscular layers of the renal capsule, which squeeze the kidney. B) opening of valves into the entrance of the ureters, which permits urine to flow through them passively. C) peristalsis of the ureters. D) gravity. E) All of the answers are correct.
An abnormal lateral curvature of the spine is called
A. hunchback. B. scoliosis. C. lordosis. D. kyphosis.
The tissue that always has an apical and a basal surface is ________ tissue
A) epithelial B) connective C) muscle D) basal E) apical
You examine a cell by electron microscopy and find a molecule on the outside of the cell and in vesicles in the cytoplasm. The most likely explanation is that this substance moved into the cell by
A. apoptosis. B. osmosis. C. endocytosis. D. diffusion. E. facilitated diffusion.