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Home Q & A Board Biology-Related Homework Help Biochemistry
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Saponification is the hydrolysis of a(n) :
Saponification is the hydrolysis of a(n) :
Saponification is the hydrolysis of a(n)
 A) peptide bond
  B) ester bond
  C) anhydride bond
  D) glycosidic bond
Random   75   1 Reply
6 years ago
Which of the following groups is not present in lecithin?
Which of the following groups is not present in lecithin?
Which of the following groups is not present in lecithin?
 A) Choline
  B) Fatty acids
  C) Glycerol
  D) Phosphate
  E) All of these are components of lecithin.
Jovaini   48   1 Reply
6 years ago
Which of the following alcohols is never found in phosphatides?
Which of the following alcohols is never found in phosphatides?
Which of the following alcohols is never found in phosphatides?
 A) Ethanolamine
  B) Serine
  C) Inositol
  D) Sugars
  E) All of these can be components of phosphatides.
avaaaaa   43   1 Reply
6 years ago
Which of the following lipids is not found in biological membranes?
Which of the following lipids is not found in biological membranes?
Which of the following lipids is not found in biological membranes?
 A) triacylglycerols
  B) phosphoacylglycerols
  C) glycolipids
  D) cholesterol
nclariceb   75   2 Replies
6 years ago
Glycolipids are characterized by containing the following non-lipid component:
Glycolipids are characterized by containing the following non-lipid component:
Glycolipids are characterized by containing the following non-lipid component:
 A) Sugars
  B) Glycerol
  C) Phosphate
  D) Sphingosine
  E) More than one of these characterize glycolipids.
lacinb30   35   1 Reply
6 years ago
Phospholipids are particularly important in these structures:
Phospholipids are particularly important in these structures:
Phospholipids are particularly important in these structures:
 A) Membranes.
  B) Lipoproteins.
  C) The brain and nervous system.
  D) Membranes, the brain and the nervous system.
  E) All of these are correct.
jennjenn563   52   1 Reply
6 years ago
Which of the following molecules is not amphipathic?
Which of the following molecules is not amphipathic?
Which of the following molecules is not amphipathic?
 A) cholesterol
  B) glucose
  C) oleic acid
  D) phosphatidylcholine
mdlc0516   75   1 Reply
6 years ago
Which of the following is true?
Which of the following is true?
Which of the following is true?
 A) Fatty acids with trans double bonds may be particularly unhealthy because they increase the ratio of LDLs to HDLs.
  B) A fatty acid with 14 carbons and one trans double bond will behave more like a sat
bronzeclock   54   1 Reply
6 years ago
Glycolipids are particularly important in these structures:
Glycolipids are particularly important in these structures:
Glycolipids are particularly important in these structures:
 A) Membranes.
  B) Lipoproteins.
  C) The brain and nervous system.
  D) Membranes, the brain and the nervous system.
  E) All of these are correct.
rachelkimq   37   1 Reply
6 years ago
Sphingolipids are particularly important in these structures:
Sphingolipids are particularly important in these structures:
Sphingolipids are particularly important in these structures:
 A) Membranes
  B) Lipoproteins
  C) The brain and nervous system.
  D) Membranes, the brain and the nervous system.
  E) All of these are correct.
bronzeclock   45   2 Replies
6 years ago
Which of the following groups is not present in sphingomyelin?
Which of the following groups is not present in sphingomyelin?
Which of the following groups is not present in sphingomyelin?
 A) Sphingosine
  B) Fatty acid
  C) Phosphate
  D) Sugar
Jovaini   51   1 Reply
6 years ago
Which of the following four fatty acids has the highest melting point? 1. CH3CH2CH2CH2CH2COOH 2. ...
Which of the following four fatty acids has the highest melting point? 1. CH3CH2CH2CH2CH2COOH 2. ...
Which of the following four fatty acids has the highest melting point? 1. CH3CH2CH2CH2CH2COOH 2. CH3CH2CH2CH2CH2CH2CH2CH 2CH2COOH 3. CH3CH2CH2CH2CH2CH2CH2COOH 4. CH3CH=CHCH2CH2COOH
 A) 1
  B) 2
  C) 3
  D) 4
bdiddydog   60   1 Reply
6 years ago
The HDL class of lipoprotein is generally believed to be preventative of heart disease. :
The HDL class of lipoprotein is generally believed to be preventative of heart disease. :
The HDL class of lipoprotein is generally believed to be preventative of heart disease.
 A) True
  B) False
Abessesen   35   1 Reply
6 years ago
Fatty acids with multiple double bonds are usually conjugated. :
Fatty acids with multiple double bonds are usually conjugated. :
Fatty acids with multiple double bonds are usually conjugated.
 A) True
  B) False
MB0727   46   1 Reply
6 years ago
Which of the following four fatty acids has the lowest melting point? 1. CH3CH2CH2CH2CH2COOH 2. ...
Which of the following four fatty acids has the lowest melting point? 1. CH3CH2CH2CH2CH2COOH 2. ...
Which of the following four fatty acids has the lowest melting point? 1. CH3CH2CH2CH2CH2COOH 2. CH3CH2CH2CH2CH2CH2CH2CH 2CH2COOH 3. CH3CH2CH2CH2CH2CH2CH2COOH 4. CH3CH=CHCH2CH2COOH
 A) 1
  B) 2
  C) 3
  D) 4
shoppa   69   1 Reply
6 years ago
With what compound are fatty acids reacted to make a fat or oil?
With what compound are fatty acids reacted to make a fat or oil?
With what compound are fatty acids reacted to make a fat or oil?
 A) cholesterol
  B) glycerol
  C) sphinganine
  D) ceramide
stalmoney   56   2 Replies
6 years ago
The myelin sheaths of neurons typically contain large amounts of :
The myelin sheaths of neurons typically contain large amounts of :
The myelin sheaths of neurons typically contain large amounts of
 A) waxes
  B) triacylglycerols
  C) cholesterol
  D) sphingolipids
bdiddydog   34   1 Reply
6 years ago
Lipids differ from most other biomolecules because they are defined on the basis of solubility, ...
Lipids differ from most other biomolecules because they are defined on the basis of solubility, ...
Lipids differ from most other biomolecules because they are defined on the basis of solubility, rather than on their chemical structure.
 A) True
  B) False
motee   39   1 Reply
6 years ago
Which of the following best describes lipids' insolubility in water?
Which of the following best describes lipids' insolubility in water?
Which of the following best describes lipids' insolubility in water?
 A) They are typically very soluble.
  B) They are typically insoluble.
  C) There is no general trend as to lipids' solubility in water.
Linalovespickle   61   1 Reply
6 years ago
Glycolipids on the surface of cells are especially important as cell markers. :
Glycolipids on the surface of cells are especially important as cell markers. :
Glycolipids on the surface of cells are especially important as cell markers.
 A) True
  B) False
Abessesen   40   1 Reply
6 years ago
Which of the following cell types contains cholesterol?
Which of the following cell types contains cholesterol?
Which of the following cell types contains cholesterol?
 A) bacteria
  B) animal
  C) plant
  D) They all contain cholesterol.
yjuhen   70   2 Replies
6 years ago
Cholesterol is particularly important as a component of animal membranes. :
Cholesterol is particularly important as a component of animal membranes. :
Cholesterol is particularly important as a component of animal membranes.
 A) True
  B) False
98lindsey   58   1 Reply
6 years ago
Membrane lipids in a lipid bilayer are held together by :
Membrane lipids in a lipid bilayer are held together by :
Membrane lipids in a lipid bilayer are held together by
 A) hydrophobic interactions
  B) hydrogen bonds
  C) electrostatic forces
  D) covalent bonds
sarah_verduzco1   42   1 Reply
6 years ago
Cell membranes typically display asymmetry. What does this mean?
Cell membranes typically display asymmetry. What does this mean?
Cell membranes typically display asymmetry. What does this mean?
 A) The two leaves of a bilayer contain different collections of lipids and proteins.
  B) The fatty acyl chain on C-1 of a membrane lipid is usually different from that on
hiufwsiuefbwe   34   1 Reply
6 years ago
How does the presence of cis double bonds in fatty acids affect membrane fluidity?
How does the presence of cis double bonds in fatty acids affect membrane fluidity?
How does the presence of cis double bonds in fatty acids affect membrane fluidity?
 A) They tend to increase the fluidity.
  B) They tend to decrease the fluidity.
  C) They don't have any specific effect on fluidity.
  D) fat
rachelkimq   61   1 Reply
6 years ago
How does cholesterol affect membrane fluidity?
How does cholesterol affect membrane fluidity?
How does cholesterol affect membrane fluidity?
 A) It tends to increase the fluidity.
  B) It tends to decrease the fluidity.
  C) It doesn't have any specific effect on fluidity.
  D) membranes don't have cholesterol
crownlessking   65   1 Reply
6 years ago
Plants need cholesterol in their membranes to counteract the rigidity of the cell wall. :
Plants need cholesterol in their membranes to counteract the rigidity of the cell wall. :
Plants need cholesterol in their membranes to counteract the rigidity of the cell wall.
 A) True
  B) False
hessar3   72   2 Replies
6 years ago
Membranes are generally symmetrical, i.e., the outer face is composed of the same number and types ...
Membranes are generally symmetrical, i.e., the outer face is composed of the same number and types ...
Membranes are generally symmetrical, i.e., the outer face is composed of the same number and types of phospholipids as the inner face.
 A) True
  B) False
nclariceb   50   1 Reply
6 years ago
Which of the following would not be enriched on the outer side of the lipid bilayer compared to the ...
Which of the following would not be enriched on the outer side of the lipid bilayer compared to the ...
Which of the following would not be enriched on the outer side of the lipid bilayer compared to the inner side?
 A) Phosphoacylglyerol
  B) Ganglioside
  C) Cerebroside
  D) Sphingomyelin
omrglss   51   1 Reply
6 years ago
The association of membrane proteins with lipids in the membrane bilayer always involves :
The association of membrane proteins with lipids in the membrane bilayer always involves :
The association of membrane proteins with lipids in the membrane bilayer always involves
 A) electrostatic interactions
  B) hydrophobic interactions
  C) covalent linkages
  D) all of the above
MB0727   104   1 Reply
6 years ago
The order-disorder transition (melting) in membranes :
The order-disorder transition (melting) in membranes :
The order-disorder transition (melting) in membranes
 A) is cooperative
  B) can be monitored by fluorescence techniques
  C) can be monitored by spin labeling
  D) all of these
shoppa   41   1 Reply
6 years ago
How do the membranes of plant and animal cells compare?
How do the membranes of plant and animal cells compare?
How do the membranes of plant and animal cells compare?
 A) Animal cell membranes tend to be more rigid than those of plant cells.
  B) Animal cell membranes tend to be more fluid than those of plant cells.
  C) Animal cell membrane
crownlessking   82   1 Reply
6 years ago
Which of the following is not true?
Which of the following is not true?
Which of the following is not true?
 A) Plant oils are favored in the diet because they generally contain more unsaturated fats than found in animal fats.
  B) Unsaturated fatty acids are healthier for humans than saturated ones
  C
omrglss   41   2 Replies
6 years ago
The distribution of lipids in membranes is :
The distribution of lipids in membranes is :
The distribution of lipids in membranes is
 A) uneven, with bulkier molecules on the exterior
  B) characterized by even distribution of molecules
  C) distinguished by the absence of cholesterol
  D) not well understood
hawkins1346   40   1 Reply
6 years ago
The degree of membrane fluidity depends on :
The degree of membrane fluidity depends on :
The degree of membrane fluidity depends on
 A) the percentage of lipids that contain choline
  B) the percentage of glycolipids
  C) the percentage of fatty acids
  D) the percentage of unsaturated fatty acids
ahh_risa   56   1 Reply
6 years ago
Which of the following was not a desired goal of hydrogenating polyunsaturated fatty acids in ...
Which of the following was not a desired goal of hydrogenating polyunsaturated fatty acids in ...
Which of the following was not a desired goal of hydrogenating polyunsaturated fatty acids in butter-like spreads?
 A) To make the compound have the consistency of butter
  B) To make the compoound a solid at room temperature
  C) T
Brooke.catlin   45   1 Reply
6 years ago
I find that briefly washing cells in a buffered solution at pH 11 is effective for isolating a cell ...
I find that briefly washing cells in a buffered solution at pH 11 is effective for isolating a cell ...
I find that briefly washing cells in a buffered solution at pH 11 is effective for isolating a cell membrane-associated hormone receptor. (A standard growth solution for the cells is pH 7.) Which of following best fits this description?
 A) Thi
ksultz   36   1 Reply
6 years ago
Which of the following is not a function or characteristic of membrane proteins?
Which of the following is not a function or characteristic of membrane proteins?
Which of the following is not a function or characteristic of membrane proteins?
 A) Transport
  B) Catalytic activity
  C) Blood clotting
  D) Receptor sites
omrglss   45   1 Reply
6 years ago
Where can membrane proteins be located?
Where can membrane proteins be located?
Where can membrane proteins be located?
 A) entirely within the membrane
  B) on the surface of the membrane
  C) in either position
  D) The position of membrane proteins has never been determined.
Jovaini   91   2 Replies
6 years ago
When a membrane reaches its transition temperature, integral membrane proteins dissociate from the ...
When a membrane reaches its transition temperature, integral membrane proteins dissociate from the ...
When a membrane reaches its transition temperature, integral membrane proteins dissociate from the bilayer.
 A) True
  B) False
yjuhen   95   1 Reply
6 years ago
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