3591232
Beschreibung
Quiz von mcarpent6140, aktualisiert more than 1 year ago
|
Erstellt von mcarpent6140
vor etwa 9 Jahre
|
|
Frage 1
Frage
Shown here are the structures of fructose and glucose. These two molecules are
Antworten
-
geometric isotopes
-
enantiomers
-
geometric isomers
-
structural isomers
-
nonisotopic isomers
Frage 2
Frage
Which of the following statements correctly describes geometric isomers?
Antworten
-
They have variations in arrangement around a double bond
-
They have an asymmetric carbon that makes them mirror images
-
They have the same chemical properties
-
They have different molecular formulas
-
Their atoms and bonds are arranged in different sequences
Frage 3
Frage
Research indicates the Ibuprofen, a drug used to relieve inflammation and pain, is a mixture of two enantiomers; that is, molecules that
Antworten
-
have identical three-dimensional shapes
-
are mirror images of one another
-
lack an asymmetric carbon
-
differ in the location of their double bonds
-
differ in electrical charge
Frage 4
Frage
Research indicates that Albuterol, a drug used to relax bronchial muscles, improving airflow and thus offering relief from asthma, consists only of one enantiomer, the R- form. Why is it important for this drug to consist of only one enantiomer form, rather than a mixture of enantiomers?
Antworten
-
Different enantiomers may have different or opposite physiological effects
-
It is impossible to synthesize mixtures of enantiomers
-
It is much less expensive to synthesize one enantiomer at a time
-
Albuterol is an example of a compound for which only one enantiomer exists
-
Only the R-form of Albuterol has been studied; until more information is available, physicians prefer to use the pure R- form.
Frage 5
Frage
Which of the following is TRUE of both starch and cellulose?
Antworten
-
They are both polymers of glucose
-
They are geometric isomers of each other.
-
They can both be digested by humans
-
They are both used for energy storage in plants
-
They are both structural components of the cell wall
Frage 6
Frage
Which of the following is true of cellulose?
Antworten
-
It is a polymer composed of sucrose monomers
-
It is a storage polysaccharide for energy in plant cells
-
It is a storage polysaccharide for energy in animal cells
-
It is a major structural component of plant cell walls
-
It is a major structural component of animal cell plasma membranes.
Frage 7
Frage
Humans can digest starch but not cellulose because
Antworten
-
the monomer of of starch is glucose, while the monomer of cellulose is galactose
-
human has enzymes that can hydrolyze the beta glycosidic linkages of starch but no the alpha glycosidic linkages of cellulose
-
Humans have enzymes that can hydrolyzes the alpha glycosidic linkages of starch but not the beta glycosidic linkages of cellulose
-
humans harbor starch-digesting bacteria in the digestive tract
-
the monomer of starch is glucose, while the monomer of cellulose is maltose
Frage 8
Frage
All of the following statements concerning saturated fats are true except
Antworten
-
They are more common in animals than in plants
-
They have multiple double bonds in the carbon chains of their fatty acids
-
They generally solidify at room temperature
-
They contain more hydrogen than unsaturated fats having the same number of carbon atoms
-
They are one of several factors that contribute to atherosclerosis.
Frage 9
Frage
The R group or side chain of the amino acid serine is -CH2 -OH. The R group or side chain of the amino acid alanine is -CH3. Where would you expect to find these amino acids in a globular protein in aqueous solution?
Antworten
-
Serine would be in the interior, and alanine would be on the exterior of the globular protein.
-
Alanine would be in the interior, and serine would be on the exterior of the globular protein.
-
Both serine and alanine would be on the interior of the globular protein.
-
Both serine and alanine would be on the exterior of the globular protein.
-
Both serine and alanine would be in the interior and exterior of the globular protein.
Frage 10
Frage
If one strand of a DNA molecule has the sequence of bases 5' ATTGCA3' the other complementary strand would have the sequence
Antworten
-
5'TAACGT3'
-
3' TAACGT5'
-
5' UAACGU 3'
-
3'UAACGU5'
-
5'UGCAAU3'
Frage 11
Frage
Why are human sex hormones considered to be lipids?
Antworten
-
They are essential components of cell membranes.
-
They are steroids, which are not soluble in water.
-
They are made of fatty acids
-
They are hydrophilic compounds
-
They contribute to atherosclerosis
Frage 12
Frage
If 2 molecules of the general type showing in this figure were linked together carbon 1 of one molecule to carbon 4 of the other, the single molecule that would result would be
Antworten
-
maltose
-
fructose
-
glucose
-
galactose
-
sucrose
Frage 13
Frage
What maintains the secondary structure of a protein?
Antworten
-
peptide bonds
-
hydrogen bonds
-
disulfide bonds
-
ionic bonds
-
phosphodiester bonds
Frage 14
Frage
Which of the following statements is true regarding the molecule illustrated in this picture?
Antworten
-
It is a saturated fatty acid.
-
A diet rich in this molecule may contribute to atherosclerosis
-
Molecules of this type are usually liquid at room temperature.
-
A and B only
-
A, B, and C
Frage 15
Frage
All of the following statements concerning saturated fats are true except
Antworten
-
they are more common in animals than in plants
-
they have have multiple double bonds in the carbon
-
they generally solidify at room temperature
-
they contain moe hydrogen than unsaturated fats having the same number of carbon atoms
-
they are one of several factors that contribute the atherosclerosis
Möchten Sie mit GoConqr kostenlos Ihre eigenen Quiz erstellen? eigenen Mehr erfahren.