Exam 1 Fast Facts

A  TRUE

B  FALSE

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

B  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.

C  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.

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

A  All organisms are composed of one or more cells.

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

C  Cells arise by division of a pre-existing cell

D  The cell is the structural unit of life

A  They are all the same molecular weight.

B  They are all the same size.

C  They carry a relatively uniform negative charge distribution.

D  They carry a relatively uniform positive charge distribution.

E  They all have the same degree of hydrophobicity.

A  Differential Rotation

B  Differential Centrifugation

A  Natured

B  Denatured

A  on the surface of a water-soluble protein

B  in contact with water molecules

C  the core of a water-soluble protein

D  between two ions

E  between two charged molecules

A  FALSE

B  TRUE

A  protein motifs

B  functional groups

C  quaternary structure motifs

D  domains

A  hydrogen bonds

B  van der Waals forces

C  hydrophobic interactions

D  Both hydrophobic interactions and nonpolar covalent bonds

E  nonpolar covalent bonds

A  Primary

B  Secondary

A  FALSE

B  TRUE

A  They are weak attractive interactions

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

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

D  They can occur between most polar molecules.

A  TRUE

B  FALSE

A  quarternary structure

B  secondary structure

C  primary structure

D  tertiary structure

A  glycolipids

B  triglycerides

C  proteins

D  cholesterol

A  triglycerides, cholesterol and phosphoglycerides

B  cholesterol, triglycerides and sphingolipids

C  phosphoglycerides, sphingolipids and triglycerides

D  cholesterol, phosphoglycerides and sphingolipids

A  TRUE

B  FALSE

A  Cell lysis

B  None of these.

C  Dehydration

D  High blood pressure

A  water

B  Ca2+

C  water, glucose and Ca2+

D  glucose

A  facilitated diffusion

B  osmosis

C  simple diffusion

D  facilitated osmosis

E  active transport

A  removing cholesterol

B  the presence of double bonds in fatty acid chains

C  increasing temperature

D  increasing length of the hydrocarbon chains

A  Such molecules diffuse freely.

B  Via aquaporin channels.

C  Via active transport.

D  Through facilitated diffusion.

A  a small, polar molecule like water

B  a small, nonpolar molecule like oxygen (O2)

C  a sodium ion

D  a large, polar molecule like glucose

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

B  It makes the cell membrane fluid at room temperature.

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

D  All of these statements are correct

A  isotonic to Paramecium

B  hypertonic to Paramecium

C  None of these statements is correct

D  hypotonic to Paramecium