test 2 chapters 7, 9 & 10 Flashcards
all other things being equal, which cell will tend to me more efficient at exchanging material with its surroundings - a relatively small cell or a large cell?
a. the small cell c. it makes no difference
b. the larger cell
a. the small cell
logically, which of the following would be least likely to diffuse through a lipid bilayer?
a. water d. small, nonpolar molecules
b. oxygen e. sodium ions (Na+)
c. carbon dioxide
e. sodium ions (Na+)
which way do free water molecules tend to move during Osmosis?
a. up their concentration/osmotic pressure gradient
b. down their concentration/osmotic pressure gradient
c. they flow either way equally
d. osmosis has nothing to do with water
b. down their concentration/osmotic pressure gradient
active transport through the cell membrane occurs through the action of
a. DNA and RNA d. water molecules
b. simple diffusion
c. membrane proteins
c. membrane proteins
all the following are active transport processes (require energy) EXCEPT:
a. phagocytosis
b. pinocytosis
c. facilitated diffusion
d. the Na/K pump e. receptor mediated endocytosis
c. facilitated diffusion
ribosomes are made of two subunits; these subunits are formed (ribosomes are produced) by the organelle called the:
a. Rough E.R
b. Nucleolus
c. Mitochondria
d. Smooth E.R
b. Nucleolus
which of the following terms means “coloured body”?
a. lysosome
b. chloroplast
c. chromosome
d. ribosome
c. chromosome
a protein functioning as a pore or passageway in a cell membrane is also called a/an
a. recognition protein c. extrinsic protein
b. channel protein d. glycoprotein
b. channel protein
oxygen is critical in cellular respiration. considering that oxygen has 6 electrons in its outermost shell or orbital, how many covalent bonds does it typically form?
a. one d. six
b. two e. none - it forms ionic bonds
c. four
b. two
the process that causes lactate (lactic acid) buildup in muscles is
a. glycolysis
b. the Krebs cycle
c. chemiosmosis
d. fermentation
e. electron transport
d. fermentation
