What explanation can you give for why the sodium-potassium pump does not run out of ions to move in or out of the cell?
A. The cell continuously produces more ions to replace those moved by the pump, maintaining a constant supply.
B. Leak channels are always open, allowing the passage of sodium ions (Na+) and potassium ions (K+) across the membrane.
C. Many of the ions moved in or out then diffuse passively back through the membrane in the opposite direction.
B. Leak channels are always open, allowing the passage of sodium ions (Na+) and potassium ions (K+) across the membrane.
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After a restriction enzyme cuts DNA into fragments and the fragments pair with complementary bases, the enzyme
____________________ is used to seal the gaps in the phosphate backbone. Fill in the blank(s) with the appropriate word(s).
Which are examples of advantages that different species might have due to living in a group? (Check all that apply.)A) Wolves in a pack can take down larger prey than those alone.B) Zebras in a herd have added protection from predators.C) Because of their social nature, diseases like rabies can spread quickly through a bat colony.D) A colony of termites can build mounds over 20 feet high, with elaborate tunnels and ventilation systems.E) A flamingo in a large flock may have trouble competing for food.
What will be an ideal response?
Of the following microtubule-interacting proteins, which might you potentially investigate as a mechanism for disrupting cell division in actively replicating tumor cells?
A) Tau B) +-TIP proteins C) catastrophins D) G-actin E) FtsZ
In the following pedigree, the indicated trait is most likely caused by which type of allele?
A) autosomal recessive
B) autosomal dominant
C) X-linked recessive
D) X-linked dominant
E) Y-linked