Unit 4 Savvas Quizzes

A student is developing a model to show how proteins are synthesized in animal cells. Which organelles should the student include in the model? Select all that apply. A. Ribosomes B. Endoplasmic reticulum C. Golgi apparatus D. Mitochondria

A, B, C

The movement of matter across a cell membrane against a concentration difference is called Choose... passive transport osmosis active transport facilitated diffusion , and it requires Choose... energy osmotic pressure aquaporins homeostasis .

Active transport, Energy

The invention of which instrument allowed scientists to discover cells? A. eyeglasses B. magnifying glass C. microscope D. telescope

C

Compare and contrast light microscopes, scanning electron microscopes, and transmission electron microscopes. Sort each statement into the correct box. Some statements may apply to more than one type of microscope. Some statements may not be used. Can be used to examine cells added to Transmission Electron Microscopes

Light microscopes: Use a beam of light to produce magnified images Can be used to examine living cells and tissues Scanning Electron Microscopes: Use a beam of electrons to produce magnified images Can be used to examine DNA Can be used to examine cells Transmission Electron Microscopes: Use a beam of electrons to produce magnified images Can be used to examine DNA Can be used to examine cells

Match each cell structure with its function. Some structures may not be used.

Stores materials inside the cell: vacuole ribosome Breaks down lipids, carbohydrates, and proteins: lysosome centriole Helps the cell maintain its shape: cytoskeleton cytoplasm

Wes places red blood cells in a petri dish with pure water and observes them under a microscope. He drew a model to illustrate his observations.What is the most likely explanation for Wes's observations? A. The red blood cells were placed into an isotonic solution. Water moved into and out of the cells to maintain homeostasis. B. The red blood cells were placed into an isotonic solution. Water moved into the cells until the cells burst. C. The red blood cells were placed in a hypertonic solution. Water moved from the inside of the cells to the outside of the cells to maintain homeostasis. D. The red blood cells were placed in a hypotonic solution. Water moved from the outside of the cells to the inside of the cells until the cells burst.

D

The diagram is a model to represent the hierarchical organization in multicellular organisms.Order the tiles so that they are arranged from the simplest level on the left to the most complex level on the right.

cell, tissue, organ, organ system

Elizabeth is conducting an investigation to study how molecules are transported into and out of a cell. Elizabeth builds a model of a cell using a U-shaped tube. A barrier, which is permeable to water, but not sugar, is placed on the bottom of the tube to model the cell membrane. Elizabeth adds two different solutions to each side of the tube. The solute in each solution is sugar and the solvent is water. The initial levels of solution in Side A and Side B are equal. The concentration of sugar in Side A is lower than the concentration of sugar in Side B.What is Elizabeth likely to observe? A. Water molecules will move from Side A to Side B. The solution level on Side A will fall and the solution level on Side B will rise. B. Water molecules will move from Side B to Side A. The solution level on Side A will rise and the solution level on Side B will fall. C. Sugar molecules will move from Side A to Side B. The solution level on Side A will fall and the solution level on Side B will rise. D. Sugar molecules will move from Side B to Side A. The solution level on Side A will rise and the solution level on Side B will fall.

A

The cell membrane is made up of a lipid bilayer as shown in the model.Which of the following describes the structure and function of the cell membrane? A. The hydrophilic head groups of the lipid molecules are exposed to the outside of the cell and the cytoplasm, which is a water-like environment. The hydrophobic tails form an oily layer inside the membrane that keeps water out of the cell. B. The hydrophilic head groups of the lipid molecules are exposed to the outside of the cell and the cytoplasm, which is a water-like environment. The hydrophobic tails form an oily layer inside the membrane that allows water to enter the cell. C. The hydrophobic head groups of the lipid molecules are exposed to the outside of the cell, which is a water-like environment. The hydrophilic tails form an oily layer inside the membrane that keeps water out of the cell. D. The hydrophobic head groups of the lipid molecules are exposed to the outside of the cell, which is a water-like environment. The hydrophilic tails form an oily layer inside the membrane that allows water to enter the cell.

A

The model illustrates a process by which a substance is taken up by a cell.Which statements describe the process? A. The model shows the process of endocytosis. B. The process shown in the model requires energy from the cell. C. The cell membrane in the model remains intact throughout the process. D. The model shows the process of facilitated diffusion.

A

Escherichia coli, or E.coli, is a species of bacteria. Entamoeba histolytica, or E. histolytica, is a single-celled amoeba. What do E. coli and E. histolytica have in common? Select all that apply. A. They depend on sources of energy or food. B. They are unable to respond to changes in their environment. C. They maintain homeostasis by cell specialization. D. They reproduce.

A and D

Which are the main points of the cell theory? Select all that apply. A. Cells are the basic units of structure and function in living things. B. New cells are produced from existing cells. C. All cells enclose their DNA within a nucleus. D. All living things are made up of cells.

B, C, D

In the human digestive system, the stomach, pancreas, and intestines work together. Which of the following is an example of a tissue in the digestive system? A. The stomach B. Smooth muscle that lines the stomach C. Nerve cells in the stomach D. Enzyme molecules in the stomach

B

The pancreas produces enzymes that aid in digestion. By what process are these digestive enzymes excreted from pancreas cells? A. osmosis B. exocytosis C. endocytosis D. diffusion

B

Josey wants to look at the cells of an onion under a light microscope. She peels off a thin, transparent layer of onion and places it on a microscope slide. Josey places the sample on the microscope stage, looks through the eyepiece, and adjusts the stage to focus the image. However, she is unable to see any details of the cells.Which of the following possible solutions could possibly help Josey to see the onion cells in detail? A. Josey should use a thicker piece of onion for her sample. B. Josey should place her onion sample in a vacuum. C. Josey should place a drop of water on her sample. D. Josey should apply a stain, such as iodine, to her sample.

D

The pancreas is an organ present in some animals. It produces enzymes that are used in the digestive system of the animal. Which cell structure is likely to be abundant inside pancreas cells? A. Cell walls, because cell walls cannot be digested by enzymes B. Chloroplasts, because chloroplasts provide the energy for making enzymes C. Nuclei, because nuclei contain the instructions for synthesizing enzymes D. Ribosomes, because enzymes are synthesized on ribosomes

D

The instructions for making proteins are coded in the Choose... DNA cytoplasm endoplasmic reticulum nucleus of a cell. In a eukaryotic cell, these instructions are located in the Choose... endoplasmic reticulum cytoplasm nucleus DNA .

Nucleus, Cytoplasm

Classify each type of cell transport.

Passive transport: Diffusion Osmosis Facilitated Diffusion Active transport: Active transport exocytosis endocytosis

The table compares prokaryotes, plant cells, and animal cells.Complete the table.

Prokaryotes: Absent, Absent Plant cell: Present, Present, Present Animal cell: Present, Present, Absent

Compare and contrast prokaryotic cells and eukaryotic cells. Sort each statement into the correct box. Some statements may apply to more than one type of cell. Some statements may not be used.

Prokaryotic cells: contain DNA, are surrounded by a cell membrane, were the first photosynthetic organisms on earth. Eukaryotic cells: can be specialized for specific tasks in multicellular organisms, contain DNA, contain Nuclei, are surrounded by a cell membrane.

Cells in a large multicellular organism communicate with each other by chemical signals. These signals are passed from one cell to another. To receive and respond to a chemical signal, a cell must have a for that chemical.

Receptor