The nucleus, an organelle found in eukaryotic cells, confines the __________, keeping them separated from other components of the cell
(a) lysosomes
(b) chromosomes
(c) peroxisomes
(d) ribosomes
(b)
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A cell in late anaphase of mitosis will have _____
A) no chromosomes in the center of the cell B) chromosomes clustered at one end of the cell C) individual chromatids beginning to separate from one another D) chromosomes clustered tightly at the center E) one large nuclear envelope
Respiratory distress syndrome is due to
a. a lack of surfactant in the lungs. b. premature birth. c. lack of prenatal care. d. a lack of surfactant in the lungs and premature birth. e. premature birth and lack of prenatal care.
Comparing cells synthesizing secretory proteins and cells secreting steroid hormones, the cells synthesizing the steroid hormones have
A) more rough ER. B) more smooth ER. C) equal amounts of smooth and rough ER. D) equal amounts of smooth and rough ER, but more lysosomes. E) equal amounts of smooth and rough ER, but fewer lysosomes.
Animal cells are permeable to water and urea but NOT to sucrose. Initially, the inside of a cell contains 1 M sucrose and 1 M urea and the outside 2 M sucrose and 1 M urea. After the system reaches equilibrium, what changes are observed?
A. The molarity of sucrose would be similar inside and outside the cell and water would move out of the cell causing the cell to shrivel. B. The molarity of urea would be higher outside than inside the cell. C. Water would move out of the cell causing the cell to shrivel. D. The molarity of urea would be higher outside the cell and the molarity of sucrose would be similar inside and outside the cell. E. The molarity of sucrose would be similar inside and outside the cell.