Which of these processes brings into the cell large macromolecules and particles by the formation of a vesicle in the outer membrane?
A) pinocytosis B) exocytosis
C) endocytosis D) facilitated transport
Answer: C
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The apparatus consisting of microtubules that directs chromosome movement during cell division is
called the a. spindle. b. centriole. c. histone. d. centromere. e. cleavage furrows.
Which of the following describes the direction in which nucleotides are added onto a growing DNA strand during DNA replication in cells?
a. in the 3' ? 5' direction for the leading strand, and the 5' ? 3' direction on the lagging strand b. in the 5' ? 3' direction only c. in the 5' ? 3' direction for the leading strand, and the 3' ? 5' direction on the lagging strand d. in either the 5' ? 3' direction or the 3' ? 5' direction on both strands, depending on where replication begins
Microtubules are not involved in
a. movement of chromosomes during mitosis. b. transport of membranous vesicles in the cytoplasm. c. cytokinesis of animal cells. d. movement of cilia and flagella. e. positioning of Golgi in cells.
Organisms usually have only a single transport system for any nutrient.
Answer the following statement true (T) or false (F)