Filtrate from Bowman's capsule flows into the
a. papillary duct.
b. loop of Henle.
c. proximal tubule.
d. distal tubules.
e. peritubular capillary.
C
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What molecule would be considered a covalent compound?
a. oxygen (O2) b. sodium chloride (NaCl) c. water (H2O) d. a diamond (C) e. ozone (O3)
PCR uses a special DNA polymerase that resists ____
a. time decay b. acids c. bases d. high temperatures e. centrifugation
Why can a person who is unable to produce insulin be successfully treated with insulin derived from genetically modified bacteria?
A) Typical bacterial insulin is exactly the same as human insulin. B) The gene that produces insulin in humans was inserted into the bacteria where it continues to produce human insulin. C) The insulin-producing gene of bacteria was altered to have the same base sequence as the human counterpart and now produces the human version of insulin. D) Bacterial insulin is similar enough to human insulin to serve the same purpose.
A part of the promoter, called the TATA box, is said to be highly conserved in evolution. Which of the following might this illustrate?
A. The sequence is transcribed at the start of every gene. B. Any mutation in the sequence is selected against. C. The sequence does not mutate. D. The sequence is found in many but not all promoters. E. The sequence evolves very rapidly.