Which item below is NOT a function or role performed by proteins found in the plasma membrane?
A)receptor for chemical messenger molecules
B)joining of adjacent cells
C)transport of solutes
D)synthesis of proteins
E)attachment site for cytoskeleton
D)synthesis of proteins
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The __________ describes how phospholipids, proteins, and other biological molecules come together to form a flexible cell membrane
Fill in the blank with the correct word.
The structure that separates the middle ear from the inner ear is the:
a. tympanic membrane b. oval window c. ossicles d. auditory canal
Severe anemia may trigger an adaptive conversion of
A. red marrow to yellow marrow. B. yellow marrow to red marrow. C. bone marrow to spongy bone. D. spongy bone to compact bone.
Since there are no genes coding for carbohydrates, nucleic acids, or lipids, how do cells produce them?
A. Enzymes encoded by genes synthesize these products. B. Cells import these products from older cells. C. Cells absorb these products by endocytosis. D. Cells are born with all the products they need. E. Cells can produce carbohydrates, nucleic acids, and lipids out of proteins.