All of the following are polysaccharides except
A. agar used to make solid culture media.
B. a cell's glycocalyx.
C. dextran in some bacterial slime layers.
D. cellulose in certain cell walls.
E. sterols in cell membranes.
Answer: E
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What is one of the very important differences between mitosis and meiosis?
a. Chromosomes align midway between spindle poles only in meiosis. b. Homologous chromosomes pair up and exchange genetic material only in meiosis. c. DNA is replicated only in mitosis. d. Sister chromatids separate only in meiosis. e. Interphase occurs only in mitosis.
Large teeth with flat surfaces would be characteristic of _____________ dinosaurs
a. carnivorous b. herbivorous c. omnivorous
Animal extracellular matrices contain each of the following except
A) collagens. B) proteoglycans. C) pectins. D) fibronectins. E) elastins.
Hair cells are delicate sensors of sound, movement, and gravity. They are stimulated by movement of the stereocilia, which are actually microvilli, and the single kinocilium, which is a true cilium.One patient at your audiology clinic has an actin defect, and another patient has a microtubule defect. How might these defects affect the function of their hair cells in hearing?
A. Neither actin nor microtubule mutations will disrupt hair cell cilia function. B. Both can create problems in hair cell cilia function. C. Only the microtubule mutation will affect hair cell cilia function. D. Only the actin mutation will affect hair cell cilia function.