Select each of the following which arc a function of the plasma membrane. Scaffo

Question

Select each of the following which arc a function of the plasma membrane. Scaffold for biochemical activities. Responding to external signals. Providing a selectively permeable barrier Regulating Transcription Compartmentalization. Providing a nonselective permeable barrier. intercellular interaction. Energy transduction Transporting solutes. Membranes can be found in all of the following EXCEPT _. a ribosome. a nucleus. a chloroplast. a mitochondrion. The major component of cell membranes is _. the presence of protein channels. attached carbohydrate moieties. cholesterol. a lipid bilayer. The "central dogma" for membrane biology is the_. Proteins surrounding a bilayer Lipid-only model Single leaf model Fluid-mosaic model Select each of the macromolecule types found in a typical plasma membrane: Lipids Carbohydrates Proteins

Explanation / Answer

Q1: Functions of plasma membrane

Scaffold for biological activities

·         Responding to external signals

·         Providing a selectively permeable barrier

·         Compartmentalization

·         Intercellular unteraction

·         Energy transduction

·         Transporting solutes

Q2: Membranes found in all of the following except in ribosome

Q3: Major component of cell membrane – A lipid bilayer (The first major component of the cell membrane is the phospholipid. Phospholipids are fats that form the majority of the membrane).

Q4: The central dogma for membrane biology is a- membrane proteins surrounding a bilayer

Q5: Macro molecules found in plasma membrane- Lipids, Proteins and carbohydrates (Three macromolecules combine to make cell membranes. Lipids calledphospholipids make up most of the cell membrane. Proteins serve as channels, pumps or markers and make up another large portion of the cell membrane. Carbohydrates are also a part of the membrane so cells can recognize each other).

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