Lipid Kahoot Questions

Which of the following crosses lipid bilayers the slowest? 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- a sodium ion

What is the energy required to move solutes? A- active transport B- facilitated transport C- passive diffusion D- osmosis

A- active transport

What type of functional group results when the OH group on glycerol reacts with the carboxylic acid group on a fatty acid? A- ester B- hydrocarbon C- peptide bond D- glycosidic bond

A- ester

What is the most important factor in explaining why diffusion occurs spontaneously? A- it leads to an increase in entropy B- it leads to a decrease in entropy C- the process is exothermic D- the process is endothermic

A- it leads to an increase in entropy

Why is vegetable oil a liquid at room temperature while animal fats are solid? A- vegetable oil has more double bonds then animal fats B- vegetable oil has fewer double bonds then animal fats C- animal fats have no amphipathic character D- vegetable oil has longer fatty acid tails then animal

A- vegetable oil has more double bonds then animal fats

The term phospholipid can be best described by which of the following? A- a nonpolar lipid molecule that is made polar by the addition of a phosphate B- a nonpolar lipid molecule that is amphipathic by the addition of a phosphate C- a polar lipid molecule that fully interacts with water D- a polar lipid molecule that fully repels water

B- a nonpolar lipid molecule that is amphipathic by the addition of a phosphate

Which of the following substances would most likely require a protein to facilitate its diffusion across a cell membrane? A- water B- glycerol C- fatty acid D- oxygen gas (O2)

B- glycerol

Steroids such as cholesterol are important and animal cell membranes but do not actually form the membrane. Why? A- The ring structure of steroids is too bulky to form a membrane B- lipids form membranes are amphipathic with a polar region/nonpolar region C- steroids can't interact with other molecules D- steroids are too permeable to charged molecules to form a cell membrane

B- lipids form membranes are amphipathic with a polar region/nonpolar region

What region of a steroid is hydrophilic? A- the methyl (-CH3) groups B- the terminal hydroxyl group C- the ring structure D- the long hydrocarbon chain

B- the terminal hydroxyl group

What would happen to a cell if placed in a hypertonic solution relative to the solution inside the cell? A- the cell will swell and burst B- water will leave the cell and the cell would shrink C- there is no net movement of water D- nothing

B- water will leave the cell and the cell would shrink

integral membrane proteins stay in membranes because of ____ A- osmotic pressure from proteins outside the cell B- diffusion of proteins from the cytoplasm to the membrane C- the locations of their polar and nonpolar amino acids D- there small size, which does not allow them to pass through the membrane

C- the locations of their polar and nonpolar amino acids

How do phospholipids interact with water molecule? A- polar heads avoid water, nonpolar tails attract water B- don't interact with water because water = polar and lipids = nonpolar C- the polar heads interact with water, the nonpolar tails do not D- phospholipids dissolve in water

C- the polar heads interact with water, the nonpolar tails do not

What most distinguishes lipids from other biomolecules is ____ A- that only lipids contain hydrogen atoms B- their molecular weight or size C- their chemical properties D- where they are found in the body

C- their chemical properties

What do phospholipids and triglycerides have in common? A- they both contain serine or some other organic compound B- they both have three fatty acids C- they both have a glycerol backbone D- they both have a phosphate

C- they both have a glycerol backbone

Which of the following crosses lipid bilayers the fastest? 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)

D- a small, nonpolar molecule like oxygen (O2)

What increases the strength of the hydrophobic interactions in lipid bilayers? A- presence of double bonds B- increasing temperature C- removing cholesterol D- increasing length of the hydrocarbon chains

D- increasing length of the hydrocarbon chains

Which of the following phospholipid membranes would be most permeable to glycerol? A- one with long and saturated fatty-acid tails B- one with long and unsaturated tails C- one with short and saturated tails D- one with short and unsaturated tails

D- one with short and unsaturated tails

Lipids that form membranes have what kind of structure? A- completely non-polar, because they are lipids B- completely polar, which allows them to dissolve in water C- polar head and nonpolar tails, the polar tails interact with water D- polar heads and nonpolar tails, the polar heads interact with water

D- polar heads and nonpolar tails, the polar heads interact with water

Where would you most likely find an integral membrane protein? A- on the outside surface of the cell membrane B- on the outside surface of the cell membrane C- floating freely in the cytoplasm D- spanning the cell membrane

D- spanning the cell membrane