Mitosis is a process of cell division that results in __________
A) two unique daughter cells
B) four unique daughter cells
C) two identical daughter cells
D) three identical daughter cells
E) four identical daughter cells
C
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Choose the item in column 2 that best matches each item in column 1.
A) breaking and capping actin B) increase cellular surface area C) assembly and disassembly D) terminal web E) control microtubule organization F) plectin G) central shaft H) nucleating actin branches I) bind to profilin and CapZ J) oligomer formation K) nucleating tubulin branches L) hemidesmosome M) decorate the actin microfilament N) dynein O) prevents loss of subunits P) desmosome Q) nuclear lamina R) account for 10-15% of microtubules S) inhibits microtubule assembly T) two identical polypeptides joined end-to-end U) found in cilia and flagella 1) axonemal microtubules 2) nucleation 3) treadmilling 4) nocodazole 5) motor MAPs 6) Arp2/3 complex 7) myosin subfragment 1 (S1) 8) capping protein 9) gelsolin 10) microvilli 11) filamin 12) polyphosphoinositides 13) nonmotor MAPs 14) axoneme 15) microtubule-associated proteins (MAPs)
The letter "F" in the accompanying figure represents ____
a. complement b. MHC markers with antigen expressed to the surface of a cell
c. lysosome fusing with a phagosome d. plasma membranes fusing e. MHC recycling
Which of the following is NOT true about enzymes?
a) They lower the activation energy of chemical reactions. b) They are consumed by the reactions they catalyze. c) Each one is specific to the particular substrate(s) to which it binds. d) They are usually made of amino acids.
How does a population differ from an ecosystem?
A) An ecosystem and a population are identical; they are two terms for the same concept. B) A population consists of all living organisms in the area, whereas an ecosystem consists of all living and nonliving aspects of an area. C) An ecosystem includes a community, whereas a population does not. D) A population consists of all living organisms in an area, whereas an ecosystem consists of only one species.