Date: Student Name: Teacher Name: Jared George. Score: 1) A cell with 1% solute concentration is placed in a beaker with a 5% solute concentration.

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1 Biology Keystone (PA Core) Quiz Homeostasis and Transport - (BIO.A ) Plasma Membrane, (BIO.A ) Transport Mechanisms, (BIO.A ) Transport Facilitation Student Name: Teacher Name: Jared George 1) A cell with 1% solute concentration is placed in a beaker with a 5% solute concentration. Date: Score: What will happen to this cell over time? A) The cell will gain H 2 O and expand. C) B) The cell will lose H 2 O and shrink. D) The cell will undergo no exchange of H 2 O with its surroundings. The cell will both gain and lose equal amounts of H 2 O ; thus, it will remain the same size. 2) About two-thirds of a cell is composed of water. What is the name of the process in which water is moved into or out of the cell membrane to maintain homeostasis? A) diffusion C) exocytosis B) endocytosis D) osmosis 3) Cells are able to remove large amounts of material using A) ectocytosis. C) phagocytosis. B) exocytosis. D) pinocytosis.

2 4) The long distance water movement, from roots up to leaves, of the water transport in large plants depends on one unique property of water. Water's unique property of allows water molecules to stick together so they can be pulled upward by the force of transpiration. A) adhesion C) indention B) cohesion D) retention 5) are responsible for the transport of substances down a concentration gradient during facilitated diffusion. A) Ionic pumps C) Carrier proteins B) Ion channels D) Protein receptors 6) Which statement describes what occurs in both animal and plant cells? A) B) Nitrogen is used for respiration and oxygen is a waste product. Oxygen is used for respiration and carbon dioxide is a waste product. C) D) Nitrogen is used for respiration and carbon dioxide is a waste product. Carbon dioxide is needed for respiration and oxygen is a waste product. 7) Most animal cell membranes have proteins that pump ions out of the cell and potassium ions into the cell. A) calcium C) magnesium B) carbon D) sodium 8) Small, uncharged substances enter and leave the cell membrane through the process of A) endocytosis. C) active transport. B) simple diffusion. D) facilitated diffusion.

3 9) All of these are methods by which a cell diffusion osmosis active transport A) maintains homeostasis. C) removes waste. B) creates energy. D) reproduces. 10) Because water is a polar molecule, it makes an excellent solvent for polar and compounds found within cells and tissues. A) ionic C) nonpolar B) lipid D) oil-based 11) The cellular process in which materials are moved across a membrane from an area of low concentration to an area of high concentration is called A) osmosis. C) active transport. B) simple diffusion. D) passive transport. 12) Gases such as oxygen and carbon dioxide cross the plasma membrane by A) special gas transport proteins. C) active transport through protein channels. B) osmosis through the lipid bilayer. D) passive diffusion through the lipid bilayer. 13) What would happen to a freshwater protozoan if removed from its normal habitat and placed into a saltwater pool? A) loss of water through osmosis C) loss of water through active transport B) gain of water through osmosis D) gain of water through active transport 14) A red blood cell will shrink in size when placed in a more concentrated salt solution because of the passive process called A) biosis. C) mitosis. B) endocytosis. D) osmosis. 15) Which process moves water molecules across the membrane of a cell? A) diffusion C) exocytosis B) endocytosis D) osmosis

4 16) While cleaning a saltwater aquarium, students placed a family of fiddler crabs from the saltwater aquarium into a container of distilled water. What effect will this have on the crabs? A) The crabs will not be affected at all. C) B) The crabs will excrete excess salts left in their systems. D) The crabs will die if left in the freshwater, their cells will burst. The crabs will die if left in the freshwater, their cells will shrink. 17) is the process of taking material into the cell by means of infoldings of the cell membrane. A) Diffusion C) Exocytosis B) Endocytosis D) Infiltration 18) How will the movement of water affect a cell if it is transferred from a hypotonic solution to a hypertonic solution? A) The cell wall will dissolve. C) The cell will shrink in size. B) The cell will be unaffected. D) The size will increase and then reduce. 19) During, vesicles in the cell fuse with the cell membrane, releasing their contents to the outside. A) diffusion C) exocytosis B) endocytosis D) pinocytosis 20) The solution inside a plant cell is approximately a 1% saline solution. In a 25% NaCl solution, the cytoplasm of a plant cell will A) remain the same. C) shrink and draw away from the cell wall. B) swell and burst from the cell membrane. D) enlarge and cause expansion of the cell wall. 21) produce proteins by following coded instructions that come from the nucleus of the cell. A) Actins C) Microtubules B) Flagella D) Ribosomes 22) Which organelle modifies cell products, packages them for distribution, and then may turn into vesicles and bubble off the surface of the cell? A) lysosome C) Golgi apparatus B) cell membrane D) endoplasmic reticulum 23) In cells, the production of proteins is handled by the ribosomes and endoplasmic reticulum, while the processing and packaging of proteins is handled by the body. A) Golgi C) plastid B) nuclear D) cytoplasmic 24)

5 In some freshwater organisms there is a structure called a contractile vacuole that regulates water movement into and out of the cell. What explains the existence of the CV? A) The CV prevents the organism from drying out. C) The CV helps the organism move through the water. B) The CV assists the organism in capturing prey. D) The CV helps the organism maintain osmotic pressure.

6 25) In the cell, newly made proteins move directly from the ribosomes into the rough, where they are chemically modified. A) Golgi apparatus C) cytoplasmic reticulum B) mitochondrial matrix D) endoplasmic reticulum 26) This illustration shows the process of making a protein molecule. The site of protein synthesis in a cell is the A) amino acid C) ribosome B) codon D) trna 27) What is the function of the organelle identified as #6 in the picture (it is mostly brown, folded over, and is in the lower right part of the cell)?

7 A) movement C) house the digestive enzyme B) houses the cells DNA D) packages proteins for transport out of the cell 28) In the cell, which organelle has the function of using oxygen in the breakdown of glucose, releasing energy and carbon dioxide? A) ribosomes C) mitochondria B) golgi bodies D) endoplasmic reticulum 29) The human body contains many different types of glands; glands that secrete digestive enzymes, mucus, and sweat. These secretions are modified, sorted, and packaged for later release from gland cells. What cellular organelle is responsible for modifying, sorting, and packaging proteins and lipids? A) ribosomes C) mitochondria B) Golgi bodies D) endoplasmic reticulum 30) In a cell, small vacuoles that are involved in transporting substances are often called A) microvacuoles. C) transporters. B) ribosomes. D) vesicles.

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