The first step in urine formation is when blood pressure forces protein-free plasma out of glomerular capillaries and into ____.
A. Bowman’s capsule
B. the loop of Henle
C. the proximal tubule
D. the distal tubule
E. the plasma
Answer: A
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Segments of polypeptides that are retained following protein splicing are called
A) introns. B) exons. C) inteins. D) exteins. E) cleaved.
Rosalind Franklin's research contribution was
essential in
a. establishing the single-stranded nature of DNA. b. establishing the principle of base pairing. c. establishing most of the principal structural features of DNA. d. sequencing DNA molecules. e. determining the bonding energy of DNA molecules.
A structure used in rapid escape or pursuit is
indicated by letter a. A. b. B. c. C. d. D. e. E.
Which of the following are compounds?
A) H2O, O2, and CH4 B) H2O and O2 C) O2 and CH4 D) H2O and CH4, but not O2