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45 Cards in this Set
- Front
- Back
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Positive Phototaxis Describes _______? A. Movement towards a light source. B. Movement away from a Light Source. C. rotation nearby a light source. D. Energy production from a Light Source. |
A. Movement Towards a light source. |
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Which of these processes requires energy?
A. Simple diffusion B. Facilitated diffusion C. Active transport D. Osmosis |
C. Active transport
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Where is the genetic information of the cell stored?
A. Golgi apparatus B. Nucleus C. Peroxisome D. Lysosomes E. Endoplasmic reticulum |
B. Nucleus |
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In a Gram-positive cell, the peptidoglycan layer exists ____. A. in the periplasm B. underneath the plasma membrane, inside the cell C. on top of the plasma membrane, outside of the cell D. anchored by LPS |
C. on top of the plasma membrane, outside of the cell
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Symport, Uniport, and Antiport are all examples of ______. A. simple diffusion B. facilitated diffusion C. osmosis D. active transport |
D. active transport |
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Why is no energy required in passive transport? A.The membrane physically moves the molecules. B. The concentration gradient drives the movement. C. Transport proteins move the molecules, so no energy is required. |
B. The concentration gradient drives the movement. |
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A positively charged sodium ion _____. A. freely diffuses directly across the cell membrane B. would get stuck in the hydrophobic core of the membrane C. would require the use of integral protein channels to pass through a cell membrane D. is considered hypertonic is considered hypotonic |
C. would require the use of integral protein channels to pass through a cell membrane |
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By which of the following mechanisms can a cell transport a substance from a lower concentration to a higher concentration? A. Simple diffusion B.Facilitated diffusion C. Active transport D. osmosis E. aquaporins |
C. Active transport |
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What makes phospholipid membranes good at keeping some molecules out, and allowing others to freely pass? A. They are positively charged. B. They have both hydrophilic and hydrophobic regions. C. They are completely hydrophilic. D. They are completely hydrophobic. |
B. They have both hydrophilic and hydrophobic regions. |
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If you isolate teichoic acid from the cell wall of an unknown microbe, you know that _________. you A. have isolated a eukaryotic cell
B. you have isolated gram-negative bacterium C. the cell wall is composed of cellulose D. you have isolated a gram-positive bacterium |
D. you have isolated a gram-positive bacterium
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What is the similarity between facilitated diffusion and active transport?
A. Both require energy. B. Both require transport proteins. C. Both move molecules down the concentration gradient. D. Both move molecules up the concentration gradient. E. Both involve the flow of water. |
B. Both require transport proteins.
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In a Gram-negative cell, the peptidoglycan layer exists ____.
A. In the periplasm B. underneath the plasma membrane, inside the cell C. on top of the outer membrane, outside of the cell D. anchored by teichoic acid |
A. In the periplasm
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Which bacterial genus does not have a cell wall? A. Mycobacterium
B. Streptococcus C. Mycoplasma D. Bacillus E. Staphylococcus |
C. Mycoplasma
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View the attached figure.
Which of the two cell walls would you expect to contain lipoteichoic acid? A. a B. b C. neither |
A. a
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What is the function of the ER?
A. Synthesize molecules B. Breakdown toxins C. Transport molecules D. Stores excess energy reserves E. Generate ATP |
A. Synthesize molecules
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Which organelle is used to produce sugars from carbon dioxide andsunlight?
A. Mitochondria B. Chloroplasts C. Lysosomes D. Endoplasmic reticulum E.Ribosomes |
B. Chloroplasts
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Bacterial ribosomes make an attractive target for antibiotics because _____.
A. they are a different size compared to eukaryotic ribosomes B. they perform a different function in prokaryotic cells C. they use different amino acids D. are found outside of the cell |
A. they are a different size compared to eukaryotic ribosomes
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Isoniazid alone works effectively against mycobacterial species.
A. True B. False |
B. False
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Which of the following statements regarding active transport isfalse?
A. It requires the use of a transport protein. B. It requires ATP. C. It powers the diffusion of water across thecell membrane. |
C. It powers the diffusion of water across the cell membrane.
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Which of the following statements about Gram-negative cell wallsis false?
A. They have a thin layer of peptidoglycan. B. They have an extra outer layer composed of lipoproteins,lipopolysaccharides, and phospholipids. C. They are toxic to humans. D. They are sensitive to penicillin. |
D. They are sensitive to penicillin.
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Which of these is not considered a part of the bacterial cytoplasm?
A. Nucleoid B. LPS C. Endospore D. An inclusion |
B. LPS
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Which of these organelles are found in algae, but not fungi?
A. mitochondria B. chloroplasts C. ribosomes D. ERE. Lysosomes |
B. chloroplasts
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Nitrate, NO3-, is an important nutrient for many bacteria. By which mechanism would a bacteriumtransport nitrate into the cell?
A. Simple diffusion B. Facilitated diffusion C. Osmosis D. Facilitated Osmosis |
B. Facilitated diffusion
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Axial filaments are uniquely found in ______ cells.A. spirochete
B. vibrio C. bacillus D. eukaryotic E. spirilla |
A. spirochete
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A typical bacterial cell has a salt concentration of 1%. If the cell is placed in a solution containing 10% salt, the net flow of water will be ___.
A. out of the cell B. into the cell C. equally in and out of the cell |
A. out of the cell
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Penicillins show great selective toxicity because _____.
A. they are very simple to create B. they are enzymes C. peptidoglycan is not found in human cells D. bacterial plasma membranes are different from eukaryotic membranes E. they are too large to affect eukaryotic cells |
C. peptidoglycan is not found in human cells
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Which of the following organelles are responsible for generating ATP?
A. Ribosomes B. Golgi complex C. Lysosomes D. Mitochondria E. Chloroplasts |
D. Mitochondria
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Where are phospholipids most likely found in a eukaryotic cell?
A. Ribosomes B. Around organelles C. Flagella D. Plasma membrane E. Both the plasma membrane and organelles |
E. Both the plasma membrane and organelles
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If a eukaryotic cell lost its peroxisomes, it would _____.
A. lose the ability to generate cell energy B. lose the ability to digest solid waste C. lose the ability to synthesize lipids D. lose the ability to break down alcohol, a toxin E. lose the ability to photosynthesize |
D. lose the ability to break down alcohol, a toxin
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Each of thefollowing statements concerning the gram-positive cell wall is true except _____.
A. it maintains the shape of the cell B. it is sensitive to penicillin C. it protects the cell in a hypertonic environmentD. it contains teichoic acids E. it is made of peptidoglycan |
C. it protects the cell in a hypertonic environment
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Which of the following cell structures has a role in the initiation of disease?
A. Cell membrane B. Fimbriae C. Flagella D. Gram-positive cell wall E. Ribosomes |
B. Fimbriae
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Which organelle is used to produce sugars from carbon dioxide and sunlight?
A. Mitochondria B. Chloroplasts C. Lysosomes D. Endoplasmic reticulum E. Ribosomes |
B. Chloroplasts
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How is passive diffusion of ions vs passive diffusion of glucose similar?
A. Both can squeeze past the phospholipids to cross the membrane. B. Both require ATP to power transport. C. Both require channels to cross the membrane. D. They cross the membrane in different ways. |
C. Both require channels to cross the membrane.
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The shape of a bacterial cell is determined primarily by the ____.
A. cell membrane B. cell wall C. capsule D. slime layer E.flagella |
B. cell wall
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Which structure can protect bacteria from being phagocytized?
A. Slime layer B. Fimbriae C. Capsule D. Cell membrane E. Cell wall |
C. Capsule
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Cells placed in a hypotonic solution tend to lose water due to osmotic pressure.
A. True B. False |
B. False
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Which of the following statements is correct about simple diffusion?
A. It requires an expenditure of energy by the cell. B. It is a passive process in which molecules move from a region of higher concentration to a region of lower concentration. C. It is an active process in which molecules move from a region of lower concentration to one of higher concentration. D. It may require a transport protein.E. It involves movement of molecules down a concentration gradient and may require a transport protein. |
B. It is a passive process in which molecules move from a region of higher concentration to a region of lower concentration.
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Which of the following are responsible for making proteins?
A. Ribosomes B. Golgi complex C. Lysosomes D. Mitochondria E. Chloroplasts |
A. Ribosomes
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A typical bacterial cell has a salt concentration of 1%. If the cell is placed in a solution containing 10% salt, the net flow of water will be ___.
A. out of the cell B. into the cell C. equally in and out of the cell |
A out of the cell |
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Oxygen crosses a plasma membrane _____.
A. by osmosis B. through simple diffusion C. with the help of a nonspecific transporter D. through facilitated diffusion E. through porins |
B. through simple diffusion
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Antibiotics that target cell wall synthesis ultimately cause bacterial cell death as a result of ____.
A. lysis B. inhibition of molecular transport C. decreased synthesis of peptidoglycan D. plasmolysis E. cell shrinkage |
A. lysis
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If you isolate LPS from the cell wall of an unknown microbe, you know that _________.
A. you have isolated a virus B. you have isolated an archaea C. the cell wall is composed of cellulose D. you have isolated a gram-negative bacteriumE. you have found a fungus |
D. you have isolated a gram-negative bacterium
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How would a cell without flagella be described?A. Monotrichous
B. Nontrichous C. Pseudotrichous D. Atrichous E. Peritrichous |
D. Atrichous
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Which of the following is not a common bacterial shape?
A. Spirochete B. Coccus C. Square D. Bacillus |
C. Square
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Fimbriae and pili differ in that pili ______.A. are used to transfer DNA.B. are composed of pilin.C. are used for asexual reproduction.D. are composed of flagellin.E. are used to survive harsh environments
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are used to transfer DNA.
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