Exam 1 Fast Facts

A  TRUE

B  FALSE

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

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

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  The cell is the structural unit of life

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  Cells arise by division of a pre-existing cell

A  They carry a relatively uniform negative charge distribution.

B  They are all the same molecular weight.

C  They carry a relatively uniform positive charge distribution.

D  They are all the same size.

E  They all have the same degree of hydrophobicity.

A  Differential Centrifugation

B  Differential Rotation

A  Denatured

B  Natured

A  between two ions

B  in contact with water molecules

C  between two charged molecules

D  the core of a water-soluble protein

E  on the surface of a water-soluble protein

A  TRUE

B  FALSE

A  protein motifs

B  domains

C  functional groups

D  quaternary structure motifs

A  hydrophobic interactions

B  van der Waals forces

C  hydrogen bonds

D  nonpolar covalent bonds

E  Both hydrophobic interactions and nonpolar covalent bonds

A  Secondary

B  Primary

A  FALSE

B  TRUE

A  They are weak attractive interactions

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 can occur between most polar molecules.

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

A  TRUE

B  FALSE

A  quarternary structure

B  primary structure

C  secondary structure

D  tertiary structure

A  triglycerides

B  proteins

C  glycolipids

D  cholesterol

A  triglycerides, cholesterol and phosphoglycerides

B  phosphoglycerides, sphingolipids and triglycerides

C  cholesterol, triglycerides and sphingolipids

D  cholesterol, phosphoglycerides and sphingolipids

A  FALSE

B  TRUE

A  Cell lysis

B  None of these.

C  Dehydration

D  High blood pressure

A  Ca2+

B  glucose

C  water

D  water, glucose and Ca2+

A  osmosis

B  facilitated diffusion

C  active transport

D  simple diffusion

E  facilitated osmosis

A  removing cholesterol

B  the presence of double bonds in fatty acid chains

C  increasing temperature

D  increasing length of the hydrocarbon chains

A  Via aquaporin channels.

B  Such molecules diffuse freely.

C  Via active transport.

D  Through facilitated diffusion.

A  a small, polar molecule like water

B  a sodium ion

C  a large, polar molecule like glucose

D  a small, nonpolar molecule like oxygen (O2)

A  It makes the cell membrane fluid at room temperature.

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  All of these statements are correct

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

A  None of these statements is correct

B  isotonic to Paramecium

C  hypotonic to Paramecium

D  hypertonic to Paramecium