MEMBRANE STRUCTURE AND FUNCTION QUIZ

is the uptake of macromolecules from the intracellular space into the cell across the plasma membrane

is the uptake of macromolecules from the extracellular space into the cell across the plasma membrane

out of the cell across the plasma membrane into the intracellular space

out of the cell across the plasma membrane into the extracellular space

an input of metabolic energy

internal energy

none of these

vibrational energy

All of these

they are always moving

they (normally) do not leak their contents

the membrane is thin compared to the enclosed volume

the long branched hydrocarbon along with the four hydrocarbon rings

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 five-methyl groups along with the hydrocarbon chain

they are permanently changed during the reaction

the substrates of the reaction are all outside the cell

the products of the reaction move in a specific direction

they do not enhance the rates of reaction

none of these

all prokaryotic cells

mitochondria of all cells

all eukaryotic cells

plant cells

animal cells

all of these

microbial cells

Lac Operon model

Lock and Key model

Fluid mosaic model

Page's model

plugs up the cardiac arteries of older men

cannot be made by higher organisms

keeps membranes fluid.

spans the thickness of the bilayer

hydrophilic

ampiphillic

hydrophobic

none of these