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Anatomy
Week 3 Chapter 5
| Question | Answer |
|---|---|
| This organelle has both a cis and a trans face | Golgi apparatus |
| Which of the following statements about integral proteins in the plasma membrane is false? | They are more abundant by volume than the membrane phospholipids |
| Cisternae of this organelle are continuous with the nuclear envelope. | rough endoplasmic reticulum |
| The inside of the cell is composed largely of a gel-like substance called | cytoplasm |
| Often referred to as the “power plant” of the cell, which organelle is the site of ATP production? | mitochondrion |
| In the matrix of the plasma membrane, a variety of proteins are embedded. Some of these proteins serve as passageway for Na+ ions or glucose. These proteins are called | transport proteins |
| A major function of the cell membrane is to | control what enters and leaves the cell |
| This membranous organelle is the site of protein synthesis for proteins that are secreted by the cell. | rough endoplasmic reticulum |
| This organelle is characterized by folded membranes called cristae. | mitochondria |
| This organelle is primarily a sac of powerful digestive enzymes called acid hydrolases. | lysosome |
| Ribosomes may be either free within the cytoplasm or bound to a membrane system known as the | rough endoplasmic reticulum |
| Which of the following cytoskeleton elements are the largest in diameter? | microtubules |
| Of the following, the only organelle that has a double membrane structure is the | mitochondrion |
| The outer boundary of a human cell is called the | plasma membrane |
| The plasma membrane is composed of all of the following except | tubulin protein |
| Which of the following is a type of cell extension that lines the intestines and other areas of the body? | microvilli |
| Ribosomes are organelles that | Ribosomes are organelles that |
| This membranous organelle contains oxidase and catalase enzymes. | peroxisome |
| Which type of junction is formed when membrane channels of adjacent plasma membranes adhere to each other? | gap junction |
| This organelle primarily modifies products from the rough ER, and it resembles a stack of hollow saucers, one cupped inside the next. | Golgi apparatus |
| A spherical membrane-bound structure that contains the genetic material of the cell and is often referred to as the “command center” of the cell is the | nucleus |
| Which area of the cytoplasm near the nucleus coordinates the building and breaking of microtubules in the cell? | centrosome |
| Which of the following is not a cytoskeleton element? | centriole |
| Phospholipids of the plasma membrane are arranged | as a bilayer with their nonpolar tails sandwiched between the polar heads. |
| This organelle is numerous in liver and kidney cells | peroxisome |
| In the cell membrane, the hydrophilic part of the phospholipid molecule: | faces the exterior of the cell/ faces the interior of the cell |
| Which are the organelles that allow for the recycling of amino acids in the cell? | Proteasomes |
| The membranous structure containing substances that protect the cell from harm are: | ribosomes/peroxisomes |
| The cell extension that contains microfilaments is called: | microvilli |
| Which of the following organelles is considered a nonmembranous organelle? | Ribosome |
| Granules or threads within the nucleus are called: | chromatin |
| Which cell fiber serves as part of our “cellular muscles?” | Microfilament |
| The largest human cell, measuring about 150 μm, is a: | female sex cell or ovum. |
| A specialized cell structure that propels the sperm is the: | flagellum |
| Rafts are stiff groupings of membrane molecules. What is their function? | Help organize the various components of the plasma membrane, Play an important role in the pinching of a parent cell into two daughter cells , Sometimes allow the cell to form depressions that form a means of carrying substances into the cell |
| The barrier function of the plasma membrane is accomplished by the: | phospholipid bilayer. |
| The presence of which substance in the cell membrane keeps it from breaking too easily? | Cholesterol |
| The fundamental organizational unit of life is the: | cell |
| Projections from the cell that move materials and mucus are called: | cilia |
| Which of the following is not a function of the smooth endoplasmic reticulum? | Provides a site for ribosome attachment |
| Which organelles consist of vesicles that have pinched off from the Golgi apparatus? | Lysosomes |
| Tiny indentations of the plasma membrane that resemble caves are called: | caveolae |
| The cell extension that assists epithelial cells in absorption is called: | microvilli |
| The structure in cells that is associated with the enzymatic breakdown (digestion) of foreign material is the: | lysosome. |
| DNA is a major constituent of which cell organelle? | Nucleus |
| The inner membrane of what double-membrane structure is contorted into folds called cristae? | Mitochondrion |
| The ____ is often called the microtubule organizing center. | centrosome |
| The enzyme catalase is an important chemical in the functioning of the: | peroxisomes |
| ATP production occurs within which organelle? | Mitochondrion |
| Which organelle processes and packages material to be secreted? | Golgi apparatus |
| Main cell structures include all of the following except: | interstitial fluid |
| Damage to the centrosome and centrioles in a cell would have the greatest impact on which cell function? | Cell division |
| The structure that separates the contents of a cell from the surrounding tissue is known as: | plasma membrane |
| The nucleolus is composed chiefly of: | rRNA |
| Skin cells (epithelial) are held tightly together by: | desmosomes |
| Which of the following is not true about ribosomes? | Surrounded by a membrane structure |
| The identification function of the cell membrane is carried out by the: | glycoprotein molecules. |
| Which of the following does not describe a structure or function of the proteasome? | Breaking down abnormal and misfolded proteins released from the ER , Looks like a hollow cylindrical drum made of protein subunits , Requires the small protein called ubiquitin to pull proteins in |
| Which of the following is not true of the rough endoplasmic reticulum? | It makes lipids and carbohydrates. |
| Which of the following is not a function of the integral membrane proteins? | Acting as receptors , Signal transduction , Identification of “self” |
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ashleysummers
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