Choose the best answer.

1			Proteins that pass from one side to the other of a plasma membrane are called _______________.
			A)	integral or transmembrane proteins
			B)	glycoproteins
			C)	receptor proteins
			D)	channel proteins
2			_________________ proteins allow water and hydrophilic solutes to pass through the plasma membrane, or they may be gated to allow the passage of material through them.
			A)	Receptor
			B)	Enzyme
			C)	Channel
			D)	Negative
3			The movement of particles WITH the concentration gradient that requires the help of a carrier molecule is called ______________.
			A)	vesicular transport
			B)	active transport
			C)	osmosis
			D)	facilitated diffusion
4			Cells that synthesize large amounts of protein contain large numbers of this organelle.
			A)	rough endoplasmic reticulum
			B)	mitochondria
			C)	lysosomes
			D)	nucleus
5			Antibiotics such as streptomycin, which is thought to associate irreversibly with bacterial ribosomes, destroy these bacteria by preventing the synthesis of _________________.
			A)	proteins
			B)	lipids
			C)	carbohydrates
			D)	DNA
6			Tay-Sachs is a genetic disease that interferes with lysosomal enzyme production. As a result, which one of the following would be the most likely consequence?
			A)	a disruption of cell division
			B)	a decrease in protein synthesis
			C)	a decrease in energy production
			D)	a buildup of materials normally removed and recycled
7			Hydrogen cyanide interferes with the enzymes located on the cristae within the mitochondria. As a result, which of the following would most likely be a consequence?
			A)	an increase in energy production
			B)	a decrease in energy production
			C)	no effect on energy production
8			Which part of the cell cycle varies greatly in length from one cell type to another?
			A)	prophase
			B)	interphase
			C)	meiosis
			D)	metaphase
9			Which of the following is NOT a characteristic of cancer?
			A)	enclosed by a fibrous capsule
			B)	fast growth
			C)	capable of spreading to other organs
			D)	caused by mutations
10			Name the stage of mitosis during which the chromosomes are aligned on the cell equator awaiting a signal to split into two.
			A)	metaphase
			B)	prophase
			C)	anaphase
			D)	telophase
11			Which of the following are NOT part of the normal cytoplasm?
			A)	cytoskeleton
			B)	interstitial fluid
			C)	organelles
			D)	inclusions
12			The only functional flagellum in the human is found in ______________________.
			A)	egg cells
			B)	respiratory tract cells
			C)	oviduct cells
			D)	sperm
13			Cell size is normally expressed in __________________.
			A)	micrometers
			B)	nanometers
			C)	meters
			D)	kilometers
14			_________ is the study of cellular structure and function.
			A)	Histology
			B)	Cytology
			C)	Anatomy
			D)	Osmosis
15			Which component of the plasma membrane effects the membrane's fluidity and strength?
			A)	protein
			B)	lipid
			C)	carbohydrate
			D)	cholesterol
16			What is the name of the structures that bind epithelial calls to an underlying basement membrane?
			A)	Microvilli
			B)	Gap junctions
			C)	Hemidesmosomes
			D)	Tight junctions
17			Which type of microscope produces dramatic three-dimensional images?
			A)	light microscope
			B)	transmission electron microscope
			C)	scanning electron microscope
			D)	phase microscope
18			There are normally about _____________ different cell types or kinds in the human body.
			A)	4
			B)	12
			C)	200
			D)	12,000
19			The upper surface of the cell is called the ___________ surface.
			A)	apical
			B)	basal
			C)	lateral
			D)	discoid
20			The material within the nucleus is called the ________________.
			A)	cytoskeleton
			B)	cytosol
			C)	nucleoplasm
			D)	interstitial fluid