Exam 1 Fast Facts

A  FALSE

B  TRUE

A  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.

B  Cultured cells are not used often by cell biologists 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  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  All organisms are composed of one or more cells.

B  The cell is the structural unit of life

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

D  Cells arise by division of a pre-existing cell

A  They carry a relatively uniform negative charge distribution.

B  They all have the same degree of hydrophobicity.

C  They carry a relatively uniform positive charge distribution.

D  They are all the same molecular weight.

E  They are all the same size.

A  Differential Rotation

B  Differential Centrifugation

A  Natured

B  Denatured

A  between two charged molecules

B  between two ions

C  the core of a water-soluble protein

D  on the surface of a water-soluble protein

E  in contact with water molecules

A  TRUE

B  FALSE

A  domains

B  quaternary structure motifs

C  functional groups

D  protein motifs

A  nonpolar covalent bonds

B  hydrophobic interactions

C  van der Waals forces

D  hydrogen bonds

E  Both hydrophobic interactions and nonpolar covalent bonds

A  Secondary

B  Primary

A  TRUE

B  FALSE

A  They can occur between most polar molecules.

B  They are weak attractive interactions

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

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

A  FALSE

B  TRUE

A  secondary structure

B  tertiary structure

C  primary structure

D  quarternary structure

A  glycolipids

B  cholesterol

C  proteins

D  triglycerides

A  cholesterol, phosphoglycerides and sphingolipids

B  triglycerides, cholesterol and phosphoglycerides

C  cholesterol, triglycerides and sphingolipids

D  phosphoglycerides, sphingolipids and triglycerides

A  TRUE

B  FALSE

A  Cell lysis

B  None of these.

C  High blood pressure

D  Dehydration

A  glucose

B  water

C  water, glucose and Ca2+

D  Ca2+

A  facilitated diffusion

B  active transport

C  simple diffusion

D  facilitated osmosis

E  osmosis

A  removing cholesterol

B  the presence of double bonds in fatty acid chains

C  increasing length of the hydrocarbon chains

D  increasing temperature

A  Such molecules diffuse freely.

B  Via active transport.

C  Through facilitated diffusion.

D  Via aquaporin channels.

A  a sodium ion

B  a small, polar molecule like water

C  a large, polar molecule like glucose

D  a small, nonpolar molecule like oxygen (O2)

A  All of these statements are correct

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

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

D  It makes the cell membrane fluid at room temperature.

A  None of these statements is correct

B  isotonic to Paramecium

C  hypertonic to Paramecium

D  hypotonic to Paramecium