No animal cell has a _____
a. plasma membrane c. lysosome
b. flagellum d. cell wall
D
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The parathyroid gland ____
a. functions in regulation of sodium levels in the blood b. produces numerous hormones active in regulating downstream endocrine glands c. is the largest gland outside the hypothalamus d. produces only a single hormone, the thyroid regulating hormone e. produces only a single hormone, the parathyroid hormone
What is an advantage of using the lac regulatory region to control the expression of exogenous proteins in bacterial cells?
A) Expression can be controlled by the addition of an inducer to the media. B) This regulatory region functions in both bacterial and mammalian cells. C) By using this regulatory region, eukaryotic genomic DNA can be expressed in bacterial cells. D) Host regulatory mechanisms are not effective when this regulatory region is cloned into a plasmid.
A diploid germ cell will produce cells that have reduced the chromosome number by half generating four haploid nuclei in
A. fertilization. B. mitosis. C. meiosis. D. replication. E. mutation.
Cellulose is composed of monomers of:
A. ribose B. deoxyribose C. ?-glucose D. ?-glucose