Principles of Biology Test #2

Match 1. Osmosis a. movement of molecules against diffusion requiring energy 2. Diffusion b. movement of molecules with diffusion not requiring energy 3. Active Transport c. movement of water across a semi permeable membrane 4. Passive Transport d. movement of solute from a higher to lower concentration

1. C, 2. D, 3. A, 4. B

When two solutions differ in solute concentration are placed on either side of a selectively permeable membrane, and osmosis is allowed to take place, the water will __________. A. Exhibit a net movement to the side with lower water concentration B. Exhibit a net movement to the side with higher water concentration C. Exhibit a net movement to the side with lower solute concentration D. Exhibit an equal movement in both directions across the membrane

A. Exhibit a net movement to the side with lower water concentration

Which of these types of cellular transport does not require energy? A. Facilitated Diffusion B. Active Transport C. Endocytosis D. Exocytosis

A. Facilitated Diffusion

Osmosis can be defined as __________. A. The diffusion of water B. The diffusion of phospholipids C. Active transport D. The diffusion of a solute

A. The diffusion of water

If someone at the end of a restaurant smokes a cigarette, you may breathe in some smoke. The movement of smoke is governed by? A. Osmosis B. Diffusion C. Active Transport D. Facilitated diffusion

B. Diffusion

Cell to cell recognition molecules like those of the ABO on RBC's are likely to be? A. Part of the cytoskeleton B. Glycoproteins and glycolipids on the exterior cell C. Channel Proteins D. Carrier proteins using active transport

B. Glycoproteins and glycolipids on the exterior cell

A freshwater paramecium is placed into salt water. Which of the following events would occur? A. Swelling of the cell wall until it lyses B. Shriveling of the cell C. Diffusion of salt ions out of the cell D. Swelling of the cell until it is turgid

B. Shriveling of the cell

Facilitated diffusion across a biological membrane requires__________and moves a substance___________ its concentration gradient. A. Energy, down B. Transport Proteins, down C. Phospholipids, against D. Transport Proteins, against

B. Transport Proteins, down

A ____________ is a process that links the reception of a cell signal to a response in the cell. A. Photosynthesis B. Metabolism C. Cell Signaling D. Symbiosis

C. Cell Signaling

If placed in tap water, an animal cell will undergo lysis, whereas a plant cell will not. What accounts for this difference? A. Expulsion of water by the plant cell's lysosome B. The relative impermeability of the plant cell membrane to water C. The strength of the plant cell wall D. None of the above

C. The strength of the plant cell wall

Active Transport by membrane transport proteins requires and moves solutes _____________ the concentration gradient which requires energy. A. ADP, Down B. ATP, Down C. ADP, Against D. ATP, Against

D. ATP, Against

Active Transport ___________. A. Uses ATP as an energy source B. Can move solutes against their concentration gradient C. Can involve the transport of ions D. All of the above

D. All of the above

The plasma membrane is composed of lipids arranged in a A. Single layer with the hydrophilic heads near the extracellular fluid B. Single layer with the hydrophobic tails near the extracellular fluid C. Bilayer layer with the tails facing the intra- and extracellular fluid D. Bilayer with the hydrophilic heads facing the intra- and extracellular fluid

D. Bilayer with the hydrophilic heads facing the intra- and extracellular fluid

Diffusion __________. A. Require sunlight B. Requires an input of cellular energy C. Occurs when particles spread from areas where they are less concentrated to areas where they are more concentrated. D. Occurs when particles spread from areas where they are more concentrated to areas where they are less concentrated.

D. Occurs when particles spread from areas where they are more concentrated to areas where they are less concentrated

The act of Amoeba or a white blood cell engulfing a bacterium is referred to as __________. A. Osmosis B. Diffusion C. Exocytosis D. Phagocytosis

D. Phagocytosis

The names of proteins that participate in membrane transport are called? A. Enzymes B. Carrier Proteins C. Cytoskeleton Proteins D. Channel Proteins E. B and D

E. B and D

Place in order of solute concentration from highest to least concentrated: Isotonic (0.9%), Hypertonic (1.0%), Hypotonic (0.5%)

Hypertonic (1.0%), Isotonic (0.9%), Hypotonic (0.5%)

Match Transport a. proteins possess chains of sugars that serve as identification tags Recognition b. proteins assist in the passage of chemicals into and out of the cell Cytoskeleton c. proteins that bind to a chemical messengers and send a signal inside Intercellular joining d. proteins help maintain shape change cell shape Cell Signaling e. proteins that may help link adjacent cells

Transport (B), Recognition (A), Cytoskeleton (D), Intercellular joining (E), Cell Signaling (C)

Movement and secretion of large amounts of material out of the cell is called (endocytosis/exocytosis) while the intake of large amounts of substances requires (endocytosis/exocytosis)

exocytosis, endocytosis

Osmoregulation in plant cells is different because of their cell walls. In order for a plant cell to be turgid it needs to be in which type of environment (isotonic/hypotonic) while animal cell operate best in which of the following (isotonic/hypotonic) environments

hypotonic, isotonic

The (phospholipids/proteins) of the plasma membrane form a selective barrier whereas membrane (phospholipids/proteins) assist in the many functions to the cell.

phospholipids, proteins