MEMBRANE STRUCTURE AND FUNCTION QUIZ

The plasma membrane is a selectively permeable barrier due to presence of specific transport

amino acids

none of these

carbohydrates

proteins

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The model that is now known to be correct for the structure of biological membrane is

Page's model

Fluid mosaic model

Lock and Key model

Lac Operon model

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Biological membranes are like water beds because

the membrane is thin compared to the enclosed volume

they are always moving

they (normally) do not leak their contents

All of these

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Which of the following is not found in membranes?

Glycoproteins

Phospholipids

Glycolipids

Nucleic acids

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Cholesterol is somewhat amphipathic due to

the three six-membered rings along with the single five-membered ring

the single hydroxyl along with the hydrocarbon nature of the remainder of the molecule

the long branched hydrocarbon along with the four hydrocarbon rings

the five-methyl groups along with the hydrocarbon chain

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In membranes, lipids are

glycerophospholipids

sphingolipids

sterols

all of these

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Peptidoglycan is a complex consisting of

oligo-saccharide and protein

mono-saccharide and protein

aminoacid and carbohydrate

polysaccharide and protein

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The mesosomes may be the sites of

None of these

RNA replications and specialized cyclic reactions

RNA replications and specialized enzymatic reactions

DNA replication and specialized enzymatic reactions

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In Fluid mosaic model, the biological membrane can be viewed as

three dimensional solutions of oriented lipids and carbohydrate

two dimensional solutions of oriented lipids and carbohydrate

three dimensional solutions of oriented lipids and globular proteins

two dimensional solutions of oriented lipids and globular proteins

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The movement of molecules across a membrane by passive transport does not require

none of these

an input of metabolic energy

vibrational energy

internal energy

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