2858764
Descripción
Test por Foster Parnell, actualizado hace más de 1 año
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Creado por Foster Parnell
hace alrededor de 9 años
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Pregunta 1
Pregunta
The Cytoplasm consist of specialized bodies called 1. _________ suspended in a fluid matrix, the 2. __________ which consist of water and dissolved substances such as proteins and nutrients
Respuesta
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1. Organelles 2. phospholipid bilayer
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1. Golgi Bodies 2. Cystol
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1. Organelles 2. Cystol
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1. Organelles 2. Extracellular Fluid
Pregunta 2
Pregunta
The Fluid Mosaic Model describes the cell membrane as being what?
Respuesta
-
1. The mosaic nature of scattered proteins within a flexible matrix of phospholipid molecules.
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2. The rigid nature of the phospholipid bilayer with a few membrane proteins to help with recognition and transportation of molecules
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3. The mosaic nature of scattered proteins within a solid matrix made of cellulose
Pregunta 3
Pregunta
Three types of of proteins on the cell membrane are peripheral proteins, Chained proteins, and transmembrane proteins
Respuesta
- True
- False
Pregunta 4
Pregunta
Which type of transmembrane protein provides open passageways through the membrane for certain hydrophilic substances such as polar and charged molecules?
Respuesta
-
Aquaporins
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Channel proteins
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Ion channels
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Porins
Pregunta 5
Pregunta
Ion Channels....
Respuesta
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Use energy to transport materials across the membrane through a process called active transport. The Na+ - K+ pump
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Allows the passage of ions across the membrane. In nerve and muscle cells. This also includes gated channels which open and close in response to specific chemical or electrical stimuli to allow the passage of specific ions such as Na+ and K+
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allow passage of certain ions and small polar molecules
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Allow only large charged molecules to transfer
Pregunta 6
Pregunta
Porins are found in the plasma membrane of certain cells and dramatically increase the passage rate of H2O molecules
Respuesta
- True
- False
Pregunta 7
Pregunta
Carrier proteins bind to specific molecules, which changes shape and passes across into the cell E.g. glucose
Respuesta
- True
- False
Pregunta 8
Pregunta
The difference between adhesion proteins and receptor proteins is that adhesion proteins attach to neighboring cells and provide internal filaments and tubules for stability, while receptor proteins are used as a binding site for hormones and other trigger molecules
Respuesta
- True
- False
Pregunta 9
Pregunta
The function of Glycoproteins are what?
Respuesta
-
Used to help the ER assemble ribosomes by attaching polysaccharide groups to polypeptides
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To add rigidity to the cell membrane of animal cells under normal temperature
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A carbohydrate coat that covers the outer surface of the cell wall of some bacteria and the cell membrane of some animals. Provides adhesive capabilities, and a barrier to infections.
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used to distinguish between self and foreign cells and bacteria
Pregunta 10
Pregunta
What adds rigidity to the membrane of plant cells under normal conditions?
Respuesta
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Cholesterol
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Glycocalyx
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sterols
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Porins
Pregunta 11
Pregunta
The rough ER is responsible for creating glycoproteins, while the smooth ER is used for creating lipids and hormones.
Respuesta
- True
- False
Pregunta 12
Pregunta
What is the gel like substance between organelles that makes up the streaming movement within the cell
Respuesta
-
Cystol
-
Extracellular fluid
-
Cytoplasm
-
Water
Pregunta 13
Pregunta
What two subunits make up Ribosomes in prokaryotes and what are they made of?
Respuesta
-
rRNA and Protein 60S +30S
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RNA and Protein 60S+40s
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rRNA and Protein 50S + 30S
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rRNA and Protein 60S + 40S
Pregunta 14
Pregunta
The Golgi apparatus is responsible for transport of various substances in vesicles
Respuesta
- True
- False
Pregunta 15
Pregunta
Peroxisomes: break down waste such as nutrients/bacteria/cell debris
Respuesta
- True
- False
Pregunta 16
Pregunta
What are microtubules made of?
Respuesta
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actin
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tubulin
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microfilaments
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structural proteins
Pregunta 17
Pregunta
What organizes microtubules in flagella and cillia
Respuesta
-
MTOCs
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MTOAs
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MTCs
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Centrisomes
Pregunta 18
Pregunta
Which of these provides support for maintaining cell shape
Respuesta
-
Microtubule
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Microfilaments
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Intermediate filaments
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MTOCs
Pregunta 19
Pregunta
Contractile vacuoles are only found in prokaryotes
Respuesta
- True
- False
Pregunta 20
Pregunta
Storage vacuoles are used to occupy most of the plant interior, exert turgor when fully filled to maintain rigidity. They also carry of the functions of lysosomes
Respuesta
- True
- False
Pregunta 21
Pregunta
Cell Walls are only found in plants and bacteria, and are made up of cellulose, chitin, peptidoglycans, and polysaccharides.
Respuesta
- True
- False
Pregunta 22
Pregunta
Which of the following is an Anchoring Junction?
Respuesta
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desmosomes
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Gap junctions
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Plasmodesmata
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Tight junctions
Pregunta 23
Pregunta
Tight junctions do what?
Respuesta
-
Produces a seal that prevents the passage of materials between cells. characteristic of cells lining the digestive tract.
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Contain narrow tunnels that allows the passage of ions and small molecules;
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Are used to send chemical and electrical signals between cells
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Provide mechanical stability and holds structures together
Pregunta 24
Pregunta
Check all of the following that Prokaryotes don't have
Respuesta
-
Nucleus
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naked DNA
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ribosomes
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Cell walls
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Plasma membrane
Pregunta 25
Pregunta
Receptor mediated endocytosis is a type of pinocytosis that uses ligands to bind to specific dissolved molecules and fold the into the plasma membrane in vesicles
Respuesta
- True
- False
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