11749574
Descripción
Test por Christina Marshall, actualizado hace más de 1 año
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Creado por Christina Marshall
hace casi 7 años
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Pregunta 1
Pregunta
Molecules that are found in living cells and contain the element ___________ are considered organic molecules.
Respuesta
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hydrogen
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carbon
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oxygen
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nitrogen
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calcium
Pregunta 2
Pregunta
The versatility of carbon to serve as the backbone for a variety of different molecules is due to
Respuesta
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the ability of carbon atoms to form four covalent bonds
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the fact that carbon usually forms ionic bonds with many different atoms
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the abundance of carbon in the environment
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the ability of carbon to form covalent bonds with many different types of atoms
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both a and d
Pregunta 3
Pregunta
Which of the following type(s) of bonds are nonpolar?
Respuesta
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C--C
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C--O
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C--H
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both a and b
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both a and c
Pregunta 4
Pregunta
Which of the following molecules are isomers of each other?
Respuesta
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a and b
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a and c
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b and c
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a, b, and c
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None of them are isomers of each other
Pregunta 5
Pregunta
A polysaccharide that is commonly found in animals cells and stores energy is
Respuesta
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glucose
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sucrose
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glycogen
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starch
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cellulose
Pregunta 6
Pregunta
In contrast to other fatty acids, essential fatty acids
Respuesta
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are always saturated fats.
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cannot be synthesized by the organism and are necessary for survival.
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can act as building blocks for large, more complex macromolecules.
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are the simplest form of lipids found in plant cells.
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are structural components of plasma membranes
Pregunta 7
Pregunta
The structures of three molecules are shown below. Which of them is (are) amphipathic?
Respuesta
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a only
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b only
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c only
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b and c
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a and c
Pregunta 8
Pregunta
The monomers of proteins are ___________, and these are linked by polar covalent bonds commonly referred to as ______________.
Respuesta
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nucleotides, peptide bonds
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amino acids, ester bonds
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hydroxyl groups, ester bonds
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amino acids, peptide bonds
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monosaccharides, glycosidic linkages
Pregunta 9
Pregunta
A _______________ is a portion of protein with a particular structure and function.
Respuesta
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peptide bond
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domain
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phospholipid
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wax
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monosaccharide
Pregunta 10
Pregunta
A DNA molecule contains 30% G. What percentage of its bases are A?
Respuesta
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30%
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20%
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15%
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10%
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none of the above
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