Term
Cell membrane = plasma membrane = phospholipid bilayer
a. true
b. false |
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Definition
Cell membrane = plasma membrane = phospholipid bilayer
A. TRUE
b. false |
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Term
The cell membrane serves as a(n)
a. impermeable barrier to everything
b. selectively permeable barrier, controlling (to some degree) what goes into and comes out of a cell
c. freely permeable membrane that allows anything in or out of a cell. This way enzymatic reactions can take place without any energy having to be expended. Nature always prefers low-energy solutions.
d. membrane which allows water to pass freely. Every other molecule requires energy to come in or go out.
e. none of the above |
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Definition
The cell membrane serves as a(n)
a. impermeable barrier to everything
B. SELECTIVELY PERMEABLE BARRIER, CONTROLLING (TO SOME DEGREE) WHAT GOES INTO AND COMES OUT OF A CELL
c. freely permeable membrane that allows anything in or out of a cell. This way enzymatic reactions can take place without any energy having to be expended. Nature always prefers low-energy solutions.
d. membrane which allows water to pass freely. Every other molecule requires energy to come in or go out.
e. none of the above |
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Term
You’ve just invented a filter that’s able to filter out organelles (keep them from passing through the filter). You take a batch of cells, squish them up so that their cell membranes are ruptured and filter the residue. The stuff that makes it through your filter is called:
a. cytosol
b. cytoplasm
c. intracellular fluid
d. a and c
e. b and c |
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Definition
You’ve just invented a filter that’s able to filter out organelles (keep them from passing through the filter). You take a batch of cells, squish them up so that their cell membranes are ruptured and filter the residue. The stuff that makes it through your filter is called:
a. cytosol
b. cytoplasm
c. intracellular fluid
D. A AND C
e. b and c |
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Term
You’re developing a protein in your lab by having cells synthesize it for you. Which of the following cellular components will most likely be playing a direct role in the production of this protein?
a. DNA
b. RNA
c. ribosomes
d. amino acids
e. all of the above |
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Definition
You’re developing a protein in your lab by having cells synthesize it for you. Which of the following cellular components will most likely be playing a direct role in the production of this protein?
a. DNA
b. RNA
c. ribosomes
d. amino acids
E. ALL OF THE ABOVE |
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Term
Which of the following is in the correct order?
a. DNA RNAtranscription translation
b. DNAtranslationRNAtranscription
c. RNAtranscriptionDNAtranslation
d. DNAtranscriptionRNAtranslation
e. none of the above |
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Definition
Which of the following is in the correct order?
a. DNA RNAtranscription translation
b. DNAtranslationRNAtranscription
c. RNAtranscriptionDNAtranslation
D. DNA->TRANSCRIPTION->RNA->TRANSLATION
e. none of the above |
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Term
. DNA is a double-stranded helix that stores encoded hereditary instructions for synthesizing proteins.
a. true
b. false |
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Definition
. DNA is a double-stranded helix that stores encoded hereditary instructions for synthesizing proteins.
A. TRUE
b. false |
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Term
ATP is produced by cellular respiration in which organelle?
a. mitochondria
b. rough endoplasmic reticulum
c. cytoplasmic ribosomes
d. the nucleolus
e. proteosomes |
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Definition
ATP is produced by cellular respiration in which organelle?
A. MITOCHONDRIA
b. rough endoplasmic reticulum
c. cytoplasmic ribosomes
d. the nucleolus
e. proteosomes |
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Term
The endoplasmic reticulum, the Golgi apparatus and the nucleus are all interconnected via their membranes.
a. true
b. false |
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Definition
The endoplasmic reticulum, the Golgi apparatus and the nucleus are all interconnected via their membranes.
a. true
B. FALSE |
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Term
The fluid compartment of the cytoplasm:
a. is called the interstitial fluid
b. contains a higher concentration of K+ than the extracellular fluid
c. contains a higher concentration of Na+ than the extracellular fluid
d. a and b
e. a and c |
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Definition
The fluid compartment of the cytoplasm:
a. is called the interstitial fluid
B. CONTAINS A HIGHER CONCENTRATION OF K+ THAN THE EXTRACELLULAR FLUID
c. contains a higher concentration of Na+ than the extracellular fluid
d. a and b
e. a and c |
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Term
The organelle that sorts and separates proteins according to their destination is the:
a. nucleolus
b. Golgi apparatus
c. transport lysosome
d. proteosome
e. mitochondrion |
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Definition
The organelle that sorts and separates proteins according to their destination is the:
a. nucleolus
B. GOLGI APPARATUS
c. transport lysosome
d. proteosome
e. mitochondrion |
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Term
A lysosome may fuse with a damaged organelle or with an endosome. Either way, reusable material is reabsorbed and waste is ejected from the cell via exocytosis.
a. true
b. false |
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Definition
A lysosome may fuse with a damaged organelle or with an endosome. Either way, reusable material is reabsorbed and waste is ejected from the cell via exocytosis.
A. TRUE
b. false |
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Term
When brain cells are deprived of oxygen, they die. The primary killers are:
a. peroxisomes that are drawn to the nucleus and shred the DNA
b. peroxisomes that convert the cytosol to hydrogen peroxide in the absence of oxygen
c. lysosomes which react to the increasing pH of the cytoplasm
d. ribosomes which burst like shrapnel in all directions, disrupting the plasma membrane
e. none of the above |
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Definition
When brain cells are deprived of oxygen, they die. The primary killers are:
a. peroxisomes that are drawn to the nucleus and shred the DNA
b. peroxisomes that convert the cytosol to hydrogen peroxide in the absence of oxygen
c. lysosomes which react to the increasing pH of the cytoplasm
d. ribosomes which burst like shrapnel in all directions, disrupting the plasma membrane
E. NONE OF THE ABOVE |
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Term
The 3 main types of vesicles that bud off the maturing (trans) face of the Golgi apparatus are:
a. membrane renewal vesicles, smooth endoplasmic reticulum, proteosomes
b. peroxisomes, primary lysosomes, proteosomes
c. secondary nucleoli, secretory vesicles, peroxisomes
d. secretory vesicles, membrane renewal vesicles, primary lysosomes |
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Definition
The 3 main types of vesicles that bud off the maturing (trans) face of the Golgi apparatus are:
a. membrane renewal vesicles, smooth endoplasmic reticulum, proteosomes
b. peroxisomes, primary lysosomes, proteosomes
c. secondary nucleoli, secretory vesicles, peroxisomes
D. SECRETORY VESICLES, MEMBRANE RENEWAL VESICLES, PRIMARY LYSOSOMES |
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Term
What function is associated with the rough endoplasmic reticulum?
a. protein synthesis
b. ATP synthesis
c. Ca2+ storage
d. glycogen synthesis
e. steroid hormone synthesis |
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Definition
What function is associated with the rough endoplasmic reticulum?
A. PROTEIN SYNTHESIS
b. ATP synthesis
c. Ca2+ storage
d. glycogen synthesis
e. steroid hormone synthesis |
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Term
A cell that synthesizes large amounts of lipid intended for use outside the cell would require a large:
a. number of lysosomes
b. number of mitochondria
c. amount of rough endoplasmic reticulum
d. amount of smooth endoplasmic reticulum
e. pool of amino acids |
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Definition
A cell that synthesizes large amounts of lipid intended for use outside the cell would require a large:
a. number of lysosomes
b. number of mitochondria
c. amount of rough endoplasmic reticulum
D. AMOUNT OF SMOOTH ENDOPLASMIC RETICULUM
e. pool of amino acids |
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Term
Ubiquitin:
a. is an enzyme responsible for the breakdown of glucose
b. attaches to unwanted lipids and marks them for breakdown by lysosomes
c. is the general name for any substance able to pass through a plasma membrane
d. is the protein marker that signals the beginning of cytokinesis
e. attaches to unwanted proteins and marks them for breakdown by proteosomes |
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Definition
Ubiquitin:
a. is an enzyme responsible for the breakdown of glucose
b. attaches to unwanted lipids and marks them for breakdown by lysosomes
c. is the general name for any substance able to pass through a plasma membrane
d. is the protein marker that signals the beginning of cytokinesis
E. ATTACHES TO UNWANTED PROTEINS AND MAKRS THEM FOR BREAKDOWN BY PROTEOSOMES |
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Term
The plasma membrane is critical to the survival of a cell by preventing the passage of water molecules.
a. true
b. false |
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Definition
The plasma membrane is critical to the survival of a cell by preventing the passage of water molecules.
a. true
B. FALSE |
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Term
Microvilli:
a. are small fingerlike protrusions that increase the surface area of the cell
b. propel water across the surface of the cell allowing cell movement by rhythmic waving motions.
c. increase the rate of absorption of materials from the respiratory system
d. a and c
e. all of the above |
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Definition
Microvilli:
A. ARE SMALL FINGERLIKE PROTRUSIONS THAT INCREASE THE SURFACE AREA OF A CELL
b. propel water across the surface of the cell allowing cell movement by rhythmic waving motions.
c. increase the rate of absorption of materials from the respiratory system
d. a and c
e. all of the above |
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Term
Cilia may be found inside the upper respiratory tract where they push particulates deeper into the lungs where they may be broken down and inserted into the bloodstream for removal as waste products.
a. true
b. false |
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Definition
Cilia may be found inside the upper respiratory tract where they push particulates deeper into the lungs where they may be broken down and inserted into the bloodstream for removal as waste products.
a. true
B. FALSE |
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Term
Hydrogen peroxide is a very specific cell-killer. It’s specific for bacterial cell membranes.
a. true
b. false |
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Definition
Hydrogen peroxide is a very specific cell-killer. It’s specific for bacterial cell membranes.
a. true
B. FALSE |
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Term
Transmembrane proteins are always integral membrane proteins but integral membrane proteins are not always transmembrane.
a. true
b. false |
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Definition
Transmembrane proteins are always integral membrane proteins but integral membrane proteins are not always transmembrane.
A. TRUE
b. false |
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Term
All molecules exhibit random thermal motion
a. also known as “Brownian motion”
b. which drives diffusion
c. which stops once concentrations have reached equilibrium
d. a and b
c. all of the above |
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Definition
All molecules exhibit random thermal motion
a. also known as “Brownian motion”
b. which drives diffusion
c. which stops once concentrations have reached equilibrium
D. A AND B
c. all of the above |
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Term
The cell membrane is selectively permeable and only some molecules may pass through with no energy expended. Other molecules may cross the cell membrane but some energy (in the form of ATP) may be required. Still other molecules may never cross the cell membrane.
a. true
b. false |
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Definition
The cell membrane is selectively permeable and only some molecules may pass through with no energy expended. Other molecules may cross the cell membrane but some energy (in the form of ATP) may be required. Still other molecules may never cross the cell membrane.
A. TRUE
b. false |
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Term
Because cells are dependent upon diffusion for most processes, the diffusion rate puts a limit on cell size. That limit is around 10 micrometers in diameter.
a. true
b. false |
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Definition
Because cells are dependent upon diffusion for most processes, the diffusion rate puts a limit on cell size. That limit is around 10 micrometers in diameter.
A. TRUE
b. false |
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