ch. 4 hw Word Scramble

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Question	Answer
which of the following structures is NOT found in all bacteria	capsule
Prokaryotic cells lack membrane-enclosed organelles	all bacteria contain cytoplasm, ribosomes, a plasma membrane, and a nucleoid. Almost all bacteria have cell walls
which of the following statements regarding prokaryotic fimbriae is true	fimbriae may occur either at the poles of a bacterial cell, or can be evenly distributed over the entire surface.
which of these is true regarding plasmids?	Prokaryotic plasmids may carry genes that provide antibiotic resistance to the cell.
what is the mechanism of action of penicillin in a prokaryotic cell?	Penicillin weakens the cell wall.
Tumbles occur when	the flagella rotate clockwise
which of the following types of bacterial cells would have only a single flagellum?	Monotrichous
pentrichous bacteria make a run when?	the flagella turn counterclockwise and become bundled.
Which of the following types of bacterial cell walls would have flagella located at only one end of the cell?
which of the following statements about bacterial flagella is true?	can rotate 360°
taxis are	movement toward or away from a stimulus
which of the following terms refers to a bacterium?	positive phototaxis
as bacterium approaches a food source, one would expect	runs to become more frequent
why are receptors on the cell surface necessary for bacterial movement?	the receptors sense the stimulus and send signals to the flagella.
which of the following is an example of bacterial motility?	a bacterium moving towards a food source.
axial filaments are found on	spirochetes
which of the following statements accurately describes a difference between gram positive and gram negative cells?	only gram negative cells have lipolysaccharide (LPS) layer
which of the following statements accurately describes specific bacterial cell walls?	In gram negative bacteria, the thin layer of peptidoglycan is surrounded by an external membrane made out of phospholipids (LPS) and proteins
which statement accurately describes the structure of the plasma membrane?	the plasma membrane is a phospholipid bilayer with the hydrophilic groups oriented toward the inside and outside of the cell.
which of the following osmosis is true?	if a cell is in a hypertonic solution, water leaves the cell in an attempt to balance to concentration of solutes and reach equilibrium.
which is the correct series of events that occur during endospore formation? pg. 96	1.spore septum begins to isolate newly replicated DNA and a small portion of cytoplasm. 2. plasma membrane starts to surround DNA. 3. spore septum surrounds isolated portion forming forespore. 4. peptidoglycan layer forms between membranes. 5 spore coat f
which type of solution would cause a bacterium with a weak or damaged cell wall to burst as water moves into the cell?	hypotonic solution
why is ATP necessary for active transport?	y ATP provides energy to transfer material against its concentration gradient
which type of active transport protein moves two molecules at the same time?	symport
which transport protein employs transporters that move molecules only in one direction?	Uniport and symport
which molecule shown in the animation, the square or the circle, is moving against its concentration gradient?	both the circle and the square.
which type of the following molecules would be blocked by a cell membrane?	ions
hydrophobic molecules would enter a cell	by passive transport directly across the membrane
what is the hallmark of passive transport across the cell membranes?	it occurs along an electrochemical gradient, and may involve the use of transport proteins.
a positively charged sodium ion	would require the use of integral protein channels to pass through a cell membrane
which of the following regarding active transport is false?	it powers the diffusion of water across the cell membrane
what makes phospholipid membranes good at keeping some molecules out, and allowing others to freely pass?	they have both hydrophilic and hydrophobic regions
integral proteins are mostly involved in	transport function
how does water enter and exit a cell?	by simple diffusion or by use of integral transport protein
a glycoprotein	is a type of peripheral protein above that can be used as a receptor or in enzymatic functions
why is no energy required in passive transport?>	the concentration gradient drives the movement
once equilibrium is reached	molecules move, but there is no net movement
which of the following wouldn't move freely across the cytoplasmic membrane?	positively charged hydrogen ions.

Created by: amberhomsany