Breaking actin-myosin bonds requires
a. ATP.
b. ADP.
c. calcium.
d. phosphorus.
e. sodium.
Answer: a
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Which of the following statements about the ECM is most CORRECT?
A. It is composed of living cells. B. Its components are produced by specialized cells and transported throughout the body and deposited around the cell. C. It is a source of protein for cells. D. It protects cells from infectious agents. E. Its components are produced and secreted by the cell.
Lipids are a class of cellular macromolecules that are ____________________ in water. Fill in the blank(s) with the appropriate word(s)
The tetrahedron shape of a methane molecule is the result of orbital hybridization
__________________ Indicate whether the statement is true or false.
A survey reveals that 25 percent of a population of 1,000 individuals have attached earlobes (are homozygous recessive for the trait). For the following questions, assume that the population fits the parameters of the Hardy-Weinburg law. If p equals the frequency of the dominant allele and q equals the frequency of the recessive allele, which of the following terms represents the frequency of the individuals who show the dominant phenotype?
a. pxp b. qxq c. 2pq d. pxp +2pq e. pxp + qxq