An animal’s capacity to conserve water and to
concentrate solutes for excretion in the urine is
greater in a kidney with longer
a. Bowman’s capsules
b. loops of Henle
c. proximal tubules
d. ureters
e. afferent arterioles
Answer: b
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The upper, orange-shaded portion of this molecule is _____
1.bipolar, containing both hydrophobic and hydrophilic regions
2.hydrophobic, keeping water molecules on the outside of the membrane
3.hydrophilic, able to interact with water molecules
4.a passive transport protein, allowing molecules to pass through the membrane
Inheritance pattern in which both alleles of a gene are equally expressed in a heterozygote.
What will be an ideal response?
Which of the following compounds is NOT an enzyme?
A) dehydrogenase B) cellulase C) coenzyme A D) ?-galactosidase E) sucrase
A mutation creates a deletion in the C-terminal region of the bacterial RecA protein of E. coli rendering it Rec-. It would be reasonable to surmise this mutation might:
A. increase autoinhibition of RecA. B. increase RecA binding to DNA. C. decrease autoinhibition of RecA. D. be both A and B. E. be both B and C.