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

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  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  Cells arise by division of a pre-existing cell

D  All organisms are composed of one or more cells.

A  They are all the same molecular weight.

B  They carry a relatively uniform positive charge distribution.

C  They all have the same degree of hydrophobicity.

D  They carry a relatively uniform negative charge distribution.

E  They are all the same size.

A  Differential Centrifugation

B  Differential Rotation

A  Denatured

B  Natured

A  between two charged molecules

B  between two ions

C  on the surface of a water-soluble protein

D  in contact with water molecules

E  the core of a water-soluble protein

A  TRUE

B  FALSE

A  quaternary structure motifs

B  functional groups

C  protein motifs

D  domains

A  nonpolar covalent bonds

B  Both hydrophobic interactions and nonpolar covalent bonds

C  van der Waals forces

D  hydrophobic interactions

E  hydrogen bonds

A  Secondary

B  Primary

A  TRUE

B  FALSE

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

B  They are weak attractive interactions

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  FALSE

B  TRUE

A  secondary structure

B  primary structure

C  tertiary structure

D  quarternary structure

A  triglycerides

B  cholesterol

C  proteins

D  glycolipids

A  cholesterol, phosphoglycerides and sphingolipids

B  triglycerides, cholesterol and phosphoglycerides

C  phosphoglycerides, sphingolipids and triglycerides

D  cholesterol, triglycerides and sphingolipids

A  FALSE

B  TRUE

A  Dehydration

B  Cell lysis

C  None of these.

D  High blood pressure

A  glucose

B  water, glucose and Ca2+

C  Ca2+

D  water

A  simple diffusion

B  active transport

C  osmosis

D  facilitated osmosis

E  facilitated diffusion

A  the presence of double bonds in fatty acid chains

B  increasing temperature

C  increasing length of the hydrocarbon chains

D  removing cholesterol

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 large, polar molecule like glucose

D  a sodium ion

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 makes the cell membrane fluid at room temperature.

C  All of these statements are correct

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

A  hypertonic to Paramecium

B  hypotonic to Paramecium

C  None of these statements is correct

D  isotonic to Paramecium