Multiple Choice Quiz

1		Which is not true of cellulose?
			A)	It is an amorphous substance
			B)	A polysaccharide
			C)	Composed of glucose residues
			D)	Found as a non-linear pattern in primary walls
			E)	Usually embedded in pectins and hemicelluloses
2		An S2 layer of a cell wall is found:
			A)	adjacent to the cell membrane.
			B)	outside of S3 layer.
			C)	adjacent to vacuolar membrane (tonoplast).
			D)	outside of S1 layer.
			E)	inside of S1 layer.
3		Where may lignin be found?
			A)	Secondary walls only
			B)	Compound middle lamella
			C)	Just S3 layer only
			D)	Primary walls only
			E)	All cell wall layers
4		The primary function of intercellular spaces in most plant tissues is to:
			A)	allow for the movement of organic compounds.
			B)	provide space for the addition of secondary wall materials to cells.
			C)	facilitate gaseous exchange of cells.
			D)	maintain turgor pressure.
			E)	provide a site of extracellular storage.
5		Plasmodesmata:
			A)	are found in pit membranes of dicots.
			B)	are formed from microfilament connections between cells.
			C)	connect dead cells only.
			D)	allow for apoplastic transport of solutes.
			E)	are not found in epidermal guard cells.
6		Aerenchyma cells:
			A)	are closely compacted.
			B)	are found in floating water plants.
			C)	are produced by lysigenous formation.
			D)	develop by uniform growth of tissues.
			E)	develop and remain in total darkness.
7		Lignin is a polymer of:
			A)	phenylpropane phenolics.
			B)	lipids.
			C)	glucose residues.
			D)	amino acids.
			E)	pectins.
8		Secondary walls are characteristically:
			A)	composed only of lignin.
			B)	formed outside of the primary wall.
			C)	formed inside the cell membrane.
			D)	formed after cell growth ceases.
			E)	part of the compound middle lamella.
9		Bordered pits:
			A)	are formed with overarching primary walls.
			B)	contain plasmodesmata upon maturity.
			C)	have no pit membrane.
			D)	possess no pit aperture.
			E)	are found in cells dead at maturity.
10		The cell plate develops:
			A)	centripetally.
			B)	centrifugally.
			C)	by invagination.
			D)	after the primary wall is formed.
			E)	into a secondary wall.