What specific amino acid difference did you discover between normal and sickle-cell betaglobin?
a. Glutamine is replaced by valine.
b. Valine is replaced by glutamic acid.
c. Glutamic acid is replaced by valine.
d. No differences were detected.
c
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Four of the five answers listed below are secreted by exocrine glands. Select the exception
a. wax b. saliva c. hormone d. milk e. mucus
During receptor-mediated endocytosis, ____
a. plasma membrane receptors bind molecules to be expelled b. a small channel forms beneath the receptors c. a pit opens inside a cell d. a vesicle forms e. a vesicle is destroyed
A cell that lacks organelles is a(n)
A) eukaryotic cell. B) prokaryotic cell. C) animal cell. D) member of the Kingdom Plantae.
A man who carries a harmful sex-linked (on the X chromosome) gene will pass the gene on to
A) half of his daughters. B) half of his sons. C) all of his sons. D) all of his daughters. E) all of his sons and daughters.