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Question: All cells possess all the following components except: a. Cytoplasm b. Genetic material c. Nuc…

Question: All cells possess all the following components except:  a. Cytoplasm  b. Genetic material  c. Nuc...

All cells possess all the following components except: a. Cytoplasm b. Genetic material c. Nuclear membrane d. Plasma cell membrane e. Ribosomes Ribosomes are the site of synthesis of: a. DNA b. RNA c. Proteins d. Nucleoli c. Glucose The phospholipids that make up the plasma membrane have _____ heads and ___ tails. A) hydrophilic: hydrophobic B) hydrophobic: hydrophilic C) eukaryotic: prokaryotic D) prokaryotic: eukaryotic E) cytoplasmic: phagocytic Which of the following is not one of the functional roles of membrane proteins? a. Allowing movement of molecules that otherwise would be excluded by the lipid components of the membrane b. Transferring signals from outside the cell to inside the cell c. Maintaining the shape of the cell d. Facilitating the transport of macromolecules across the membrane c. Stabilizing the lipid bilayer The difference between tight junctions, desmosomes and gap junctions is that a. desmosomes and gap junctions contain keratin, whereas tight junctions have collagen. b. gap junctions and tight junctions have specialized protein channels called connexons, whereas desmosomes do not. c. tight junctions and desmosomes have mechanical roles, whereas gap junctions facilitate communication between cells. d. desmosomes and gap junctions are found in epithelial tissue, whereas tight junctions are found in nerve cells. c. they all have different functions, even though their structure is the same.

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