Organelles
What is the function of the rough ER?
Synthesize proteins!
What is a factor that limits the size of a cell?
Surface area to volume ratio
When would transport of a substance require ATP?
AGAINST the concentration/electrochemical gradient
A red blood cell is placed in a hypertonic salt solution. Predict what will happen.
Water leaves the cell - it shrivels
What is the name for the plastic or metal tube found on the ends of shoelaces?
Aglet
Which structure regulates the entry and exit of materials from the nucleus?
Pores in the nuclear envelope
The phospholipid bilayer has a hydrophilic head and a hydrophobic tail. What term would you use to describe a structure that has both hydrophilic and hydrophobic regions?
Amphipathic
A freshwater protozoan is placed in distilled water. Water rushes into the cell. Which type of passive transport explains this movement?
Osmosis!
A celery stalk becomes crisp again after being placed in water. Which type of solution did it enter?
Hypotonic solution
Psalm, Saint, and Chicago are the names of what?
Kim Kardashian's children
Cyanide binds to at least one molecule involved in producing ATP. In a cell exposed to cyanide, in which organelle would you find the most cyanide?
Mitochondria!
What is the role of glycoproteins and glycolipids in the cell membrane?
cell-to-cell recognition
A plant cell moves sucrose into its cytoplasm even when sucrose concentration inside is higher than outside. Which process makes this process possible?
Active transport (cotransport)
A plant cell has a water potential of –4.6 bars. It is placed in a sucrose solution with a solute potential of –4.87 bars. Which way will water move?
Water moves out of the plant cell into the solution (since the solution has lower water potential).
What is Ms. Hempen's first name?
Elizabeth or Lizzie
Tay-Sachs disease is a human genetic disorder that results in cellular accumulation of very large, complex, undigested lipids. Which of the following organelles is most likely defective in Tay-Sachs disease?
Smooth ER
How would the cell membrane structure of an organism in a very cold environment differ from an organism that lives in a warmer climate?
More unsaturated fatty acids (increases fluidity) OR more cholesterol (prevents rigidity)
A white blood cell engulfs a bacterium into a vesicle for digestion. name the specific type of endocytosis.
Phagocytosis!
An amoeba living in a freshwater pond constantly takes in water. Which organelle helps maintain osmotic balance?
Contractile vacuole
Dubbed the “Black Death,” what plague swept through Europe in the 1300s?
Bubonic plague
What pathway will a newly synthesized protein destined for secretion from a eukaryotic cell follow?
rough ER -> Golgi -> transport vesicle -> plasma membrane
Which fiber type is required by cells to assemble cilia or flagella?
microtubules (made of tubulin!)
Sodium ions attempt to diffuse into a nerve cell but can only pass when a neurotransmitter binds to a membrane protein. What type of passive transport is this?
Facilitated diffusion (via gated ion channels)
Describe how water will move across a selectively permeable membrane in terms of tonicity.
Hypotonic -> hypertonic
What year was Ms. Hempen born?
1999