A cell membrane is said to be a fluid mosaic because
A. there is water in the membrane.
B. the membrane is made of lipids and proteins that can move.
C. it forms a bilayer.
D. transport proteins allow for the movement of water-soluble molecules.
Answer: B. the membrane is made of lipids and proteins that can move.
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In a forest, trees that get more sunlight grow taller than other nearby trees. This is a form of ______
A. natural selection. B. directional selection. C. artificial selection. D. disruptive selection. E. stabilizing selection.
Four of the five organelles listed below are part of the endomembrane system. Select the exception
a. smooth ER b. peroxisomes c. Golgi bodies d. vesicles e. mitochondria
An extracellular matrix is produced by glycoprotein secretion by:
A. animal cells B. plant cells C. fungal cells D. bacterial cells
What is an episome?
What will be an ideal response?