How accurate is DNA replication?
a) there are frequent errors made during DNA replication, but this does not matter because of the immense size of the DNA molecule
b) the few errors made by DNA polymerase are usually corrected by DNA polymerase or other repair enzymes
c) DNA polymerase always makes a perfect copy of the original DNA
d) DNA polymerase makes very few errors, so no repair enzymes are needed
b) the few errors made by DNA polymerase are usually corrected by DNA polymerase or other repair enzymes
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Regulation of the amounts of water, sodium ions, and potassium ions lost in the urine occurs between the nephron loop and the
A) collecting system. B) distal convoluted tubule. C) renal corpuscle. D) proximal convoluted tubule. E) Bowman's capsule.
Which leukocyte contains histamine in its granules?
a. neutrophils b. eosinophils c. basophils d. lymphocytes e. monocytes
Concerning the abdominopelvic regions, the ________ regions lie directly superior to the lumbar regions.
A. iliac B. epigastric C. umbilical D. hypochondriac E. hypogastric
Which of the following is not associated with the large absorptive surface of the small intestine?
A. Circular folds (plicae circulares) B. Rugae C. Villi D. Intestinal length E. Microvilli