The make-up
Cellular metabolism depends on ____________.
A. Cell permeability
B. Cell size
C. Cell proliferation
D. Cell appetite
What is cell size.
One difference between plant and animal cells is that plant cells have...
a. Lysosomes
b. A central vacuole
c. Centrosomes
d. Flagella
What is b. A central vacuole.
True or False: All cells are bound by a plasma membrane.
What is true.
Which structure below is unable to imbed itself within the phospholipid bilayer?
a. Peripheral proteins
b. Cholesterol
c. Carrier proteins
d. Channel proteins
What is a. Peripheral proteins.
Which component of the plasma membrane plays an important role in the identification of other cells?
a. Cholesterol
b. Proteins
c. Glycoproteins
d. Phospholipids
What is c. Glycoproteins.
What are membranous sacs with hydrolytic enzymes, catalyze reactions, & produce H2O2?
A. Lysosomes
B. Peroxisomes
C. Chromosomes
D. Cytoplasm
What are Peroxisomes.
Plant cells have ____________________, which connect adjacent cells and allows for plant cells to communicate.
A. Plasmodesmata
B. Stoma
C. Pollen
D. Photosynthesis
What is A. Plasmodesmata.
The Calvin cycle occurs in the _________of chloroplasts.
A. Charitids
B. Chormotids
C. Chlorophyll
D. Stroma
What is Stroma.
What does it mean to say that phospholipids are amphipathic?
a. They are water fearing
b. Only hydrophilic molecules can pass through the bilayer
c. They have both hydrophilic and hydrophobic parts
d. They contain many unsaturated hydrocarbon tails
What is c. They have both hydrophilic and hydrophobic parts.
Plant cells have a(n) ______________ that covers the plasma membrane and is composed of _________.
A. wide surface, chlorophyll
B. cell wall, cellulose
C. Small surface, chlorophyll
D. cell well, cellulite
What is B. cell wall, cellulose.
Ribosomes assemble into large and small subunits, which together translate the messages found on _____ into the primary structure of polypeptides.
A. tRNA
B. RNA
C. mRNA
D. mDNA
E. tDNA
What is mRNA.
The NaCl concentration of red blood cells is 154mM. Predict what would happen if the cell was placed in a 220mM NaCl solution.
a. The red blood cell will shrivel
b. The red blood cell will swell
c. Nothing, this is an isotonic solution
d. Solutes will diffuse into the red blood cell
What is a. The red blood cell will shrivel.
One difference between prokaryotes and eukaryotes is that eukaryotes....
a. Include the domains Bacteria and Archaea
b. Tend to be much smaller in size than prokaryotes
c. Have their DNA contained in the nucleoid region
d. Contain membrane bound organelles
What is d. Contain membrane bound organelles.
_____ assist in the separation of chromosomes during cell division.
A. Macrotubules
B. Microtubules
C. Mirocromatids
D. Macro-oni
What are B. B. Microtubules
Phospholipids are __________________ which causes them to form a bilayer.
A. Amphipathic
B. Hydrophonic
C. Hydrophobic
D. Ambiophantic
What is A. Amphipathic.
The Golgi contains flattened membranous sacs called ____________.
A. grana
B. cytosol
C. cisternae
D. cellulose
What is C. Cisternae.
Inside of the chloroplast ____________ are membranous sacs that can organize into stacks known as _________________.
A. Grana, Thylakoids
B. Coritids, Grana
C. Cytosol, Cisternae
D. Thylakoids, Grana
What is D. Thylakoids, Grana.
Which of the following would be able to pass through the membrane the easiest?
a. Small, hydrophobic substances
b. Small, polar substance
c. Molecules like sucrose and glucose
d. Small, hydrophilic molecules
What is small, hydrophobic substances.
Describe the fluid mosaic model. What does fluid and mosaic refer to?
FLUID refers to the membrane is not stiff or ridged. It is held together by weak hydrophobic interactions between the tails of the Phospholipids.
MOSAIC refers to the variety of molecules that comprise the membrane (integral proteins, cholesterol, glycolipids, etc.
What is the study of how a solution's solute concentration affects the volume of cells by influencing water movement across the cell membrane through osmosis.
A. Tonicity
B. Osmotosis
C. Osmatic Permeability
D. Hydorphonic
What is Tonicity.
Phospholipid heads contain an ____________ group and a glycerol. Phospholipid tails contain fatty acid chains.
A. Phosphate
C. Amino
C. Sugar
D. Hydrogen
What is Phosphate.
A researcher is studying the movement of a protein that is secreted from a eukaryotic cell. Which of the following pathways best represents the movement she could expect for packaging/processing of the secretory protein?
a. Nucleus → Golgi → Rough ER → Cytoplasm
b. Golgi → Rough ER → secretory vesicles → Plasma membrane
c. Rough ER → Golgi → secretory vesicle → Plasma membrane
d. Secretory vesicle → Golgi → Rough ER → Cytoplasm
What is c. Rough ER → Golgi → secretory vesicle → Plasma membrane.
Most farms use irrigation systems to water their crops at needed intervals. While the water is necessary for the growth of the crops, irrigation water can contain salts. Once the crops have been watered, the excess water in the soil will evaporate leaving the salts behind. If the levels of salt in the soil build up over time, it can become toxic to the plant.
Which statement below describes why high levels of salt in soil are dangerous to plants?
a. Excess salt in the soil creates a hypotonic solution for the plant cells, which causes the plant cells to go through plasmolysis.
b. The salt added to the soil, due to the irrigation water, causes dissolved solutes in the plant cells to exit the cell via diffusion. Plants lose valuable dissolved nutrients & minerals.
c. Due to high concentration of salt, solvents in the soil will diffuse into the roots of plants.
d. When plant cells are exposed to an extracellular environment that has a high concentration of salt, it causes water to leave the plant cells.
What is d. When plant cells are exposed to an extracellular environment that has a high concentration of salt, it causes water to leave the plant cells.
Dialysis tubing was filled with a 25% glucose and 2% starch solution. This was then placed in a beaker filled with water. Glucose is able to pass through the membrane of the dialysis tubing, while starch cannot. Which of the following best predicts what will happen over time?
a. Water and glucose will both leave the dialysis tubing
b. Water will enter the dialysis tubing while glucose will leave
c. Water will leave the dialysis tubing while glucose will enter
d. Water and glucose will both enter the dialysis tubing
What is b. Water will enter the dialysis tubing while glucose will leave.
__________ in biology is the process by which organisms maintain a stable internal environment by regulating the concentration of water and dissolved solutes (like salts) in their body fluids.
A. Homeostasis
B. Homosapians
C. Osmoregulation
D. Irregulation
E. Synthesis
What is Osmoregulation.