Carrier-mediated transport is also called

A. facilitated diffusion.
B. phagocytosis.
C. exocytosis.
D. active transport.
E. endocytosis.


Answer: A

Biology & Microbiology

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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

Biology & Microbiology

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.

Biology & Microbiology

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

Biology & Microbiology

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.

Biology & Microbiology