Carrier-mediated transport is also called
A. facilitated diffusion.
B. phagocytosis.
C. exocytosis.
D. active transport.
E. endocytosis.
Answer: A
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The DNA of an organism is made up of subunits called ________.
A. histones B. amino acids C. polymerases D. mRNA E. nucleotides
A centrosome is
a. a cylindrical structure made up of nine triplets of microtubules. b. a chromosomal region that connects sister chromatids during mitosis and attaches them to the spindle. c. a protein structure that binds centromeres and mediates the attachment of chromosomes to the spindle. d. the major microtubule-organizing center in animal cells.
Which sentence correctly traces the path of a protein in the cell?
A. ribosome, endoplasmic reticulum, Golgi Apparatus B. ribosome, endoplasmic reticulum, chloroplast C. endoplasmic reticulum, lysosome, Golgi Apparatus D. ribosome, Golgi Apparatus, endoplasmic reticulum
An example of an involuntary response would be:
A. secretion of saliva. B. sighing. C. heart rate. D. both secretion of saliva and heart rate.