The descending arm of the loop of Henle is permeable to ____ but impermeable to ____.
A. water; potassium ions
B. water; sodium ions
C. sodium ions; water
D. potassium ions; water
E. All choices are incorrect.
Answer: B
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Indicate whether the statement is true or false.
Which direction would you turn Z-DNA to introduce negative super coils?
A. Right B. Left
As a new curator for a large public aquarium in your city, you are in charge of correctly identifying some of the animals presently in your care. You have two adult animals in tanks in front of you, and you know that one is a lamprey, and the other is a hagfish. Which feature would allow you to correctly identify each animal?
A. Hagfish are noted for their extensive fins, while lampreys lack fins. B. Lampreys lack jaws, but hagfish are jawed fish. C. Lampreys are parasitic, while hagfish are not parasitic. D. Hagfish must live in fresh water, while lampreys are entirely marine.
In ex vivo gene therapy, therapeutic DNA is injected into body cells with the use of a vector or carrier molecule.
Answer the following statement true (T) or false (F)