The movement of water from the soil through the different plant cells is what type of
transport?
a. active
b. passive
c. facilitated diffusion
d. fluid
B
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Genes abc and def have a high average cotransduction frequency. Genes abc and xyz have a very low average cotransduction frequency. What is the best explanation for this difference?
A. Both genes code for gene products that are necessary for viral replication. B. The genes abc and def must share a higher degree of sequence similarity. C. The genes abc and def are much closer to each other on the chromosome. D. Both genes have a high affinity for the viral binding sites.
"Chargaff's rule" for base pairing in DNA is that
A) the amount of A = the amount of G, and the amount of C = the amount of T. B) A bonds with C, and G bonds with T. C) A bonds with G, and C bonds with T. D) the amount of A = the amount of C, and the amount of G = the amount of T. E) A bonds with T, and G bonds with C.
Cardiac muscle has prolonged contraction due to a sodium induced-calcium released process into the cytoplasm of the cell. Cardiac cells can communicate through pore-like channels between cells. List the junction and the organelle involved in cardiac muscle contraction?
A. gap; rough ER B. gap; smooth ER C. adherens; rough ER D. adherens; golgi apparatus E. adherens; smooth ER F. gap; golgi apparatus
A neuron that engages in spatial summation acquires a mutation that causes dendrite overgrowth and promiscuous synapsing. What is the likely outcome?
A. Abnormally low frequency of action potentials B. Summation will not occur C. Action potentials with stronger depolarization D. Abnormally high frequency of action potentials