A.   hypertonic to Paramecium

B.   None of these statements is correct

C.   hypotonic to Paramecium

D.   isotonic to Paramecium

A.   It is oriented with the small hydroxyl group embedded in the lipid bilayer and the remainder of the molecule toward the membrane surface.

B.   It interferes with the movements of the fatty acid tails of the phospholipids.

C.   All of these statements are correct

D.   It makes the cell membrane fluid at room temperature.

A.   a small, nonpolar molecule like oxygen (O2)

B.   a large, polar molecule like glucose

C.   a sodium ion

D.   a small, polar molecule like water

A.   Through facilitated diffusion.

B.   Via aquaporin channels.

C.   Via active transport.

D.   Such molecules diffuse freely.

A.   the presence of double bonds in fatty acid chains

B.   increasing temperature

C.   removing cholesterol

D.   increasing length of the hydrocarbon chains

A.   simple diffusion

B.   facilitated diffusion

C.   facilitated osmosis

D.   active transport

E.   osmosis

A.   water

B.   glucose

C.   Ca2+

D.   water, glucose and Ca2+

A.   None of these.

B.   High blood pressure

C.   Cell lysis

D.   Dehydration

A.   TRUE

B.   FALSE

A.   phosphoglycerides, sphingolipids and triglycerides

B.   triglycerides, cholesterol and phosphoglycerides

C.   cholesterol, triglycerides and sphingolipids

D.   cholesterol, phosphoglycerides and sphingolipids

A.   triglycerides

B.   cholesterol

C.   proteins

D.   glycolipids

A.   quarternary structure

B.   tertiary structure

C.   primary structure

D.   secondary structure

A.   FALSE

B.   TRUE

A.   They can be found between the two strands of a DNA molecule.

B.   They can be found between the two strands of a DNA molecule, occur between most polar molecules and are weak attractive interactions

C.   They are weak attractive interactions

D.   They can occur between most polar molecules.

A.   FALSE

B.   TRUE

A.   Primary

B.   Secondary

A.   Both hydrophobic interactions and nonpolar covalent bonds

B.   van der Waals forces

C.   nonpolar covalent bonds

D.   hydrogen bonds

E.   hydrophobic interactions

A.   functional groups

B.   quaternary structure motifs

C.   domains

D.   protein motifs

A.   TRUE

B.   FALSE

A.   the core of a water-soluble protein

B.   on the surface of a water-soluble protein

C.   between two charged molecules

D.   between two ions

E.   in contact with water molecules

A.   Natured

B.   Denatured

A.   Differential Rotation

B.   Differential Centrifugation

A.   They carry a relatively uniform negative charge distribution.

B.   They are all the same size.

C.   They carry a relatively uniform positive charge distribution.

D.   They are all the same molecular weight.

E.   They all have the same degree of hydrophobicity.

A.   Cells arise by division of a pre-existing cell

B.   Cells contain genetic information in the form of RNA that is passed to the next cell generation

C.   All organisms are composed of one or more cells.

D.   The cell is the structural unit of life

A.   Cultured cells are not used often by cell biologists and cells can grow and reproduce in culture for extended periods.

B.   HeLa cells are cultured tumor cells isolated from a cancer patient and used by pharmaceutical companies without permission and cells can grow and reproduce in culture for extended periods.

C.   All cells in culture must be able to evolve and cultured cells are not used often by cell biologists.

D.   All cells in culture must be able to evolve and heLa cells are cultured tumor cells isolated from a cancer patient and used by pharmaceutical companies without permission and cells can grow and reproduce in culture for extended periods.

A.   TRUE

B.   FALSE