Biological Molecules

Descripción

Check understanding of biological molecules and the processes by which they are assembled and disassembled
Corey Lance
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Corey Lance
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Resumen del Recurso

Pregunta 1

Pregunta
Which of the following terms best describes this molecule?
Respuesta
  • Amino Acid
  • Monosaccharide
  • Monomer
  • More than one of these terms is appropriate

Pregunta 2

Pregunta
What is the function of this molecule?
Respuesta
  • It makes up the cell wall of plant cells.
  • It is the monomer of proteins.
  • It makes up cell membranes.
  • It is an energy source for cells.

Pregunta 3

Pregunta
Which of the following molecules are made of this type of monomer?
Respuesta
  • Glycogen
  • Cellulose
  • Starch
  • All of these molecules are made of this type of monomer

Pregunta 4

Pregunta
What process is occurring in this image?
Respuesta
  • Digestion
  • Hydrolysis
  • Dehydration synthesis
  • Catalysis

Pregunta 5

Pregunta
In this image, a ________________________ is being produced through the process of _______________________________________.
Respuesta
  • Disaccharide ... dehydration synthesis
  • Disaccharide ... hydrolysis
  • Polysaccharide ... dehydration synthesis
  • Polysaccharide ... hydrolysis

Pregunta 6

Pregunta
What do these molecules have in common?
Respuesta
  • They are all polysaccharides.
  • They all have the same function.
  • They all can be digested by humans and other animals.
  • All of these statements are true.

Pregunta 7

Pregunta
What do all lipids have in common?
Respuesta
  • They are all found in cell membranes.
  • They are all at least partially hydrophobic (nonpolar).
  • They all contain three hydrocarbon fatty acid chains.
  • All of these statements are true.

Pregunta 8

Pregunta
What is this molecule?
Respuesta
  • A monosaccharide
  • A lipid
  • An amino acid
  • A protein

Pregunta 9

Pregunta
What is the difference between 'A' and 'B'?
Respuesta
  • 'A' would be found in a protein, but 'B' would not.
  • 'A' is a sugar and 'B' is an amino acid.
  • 'A' would be involved in secondary structure, and 'B' would be involved in tertiary structure.
  • 'A' would be involved in different tertiary structure interactions than 'B'.

Pregunta 10

Pregunta
Which level of protein structure is shown in this image?
Respuesta
  • Primary
  • Secondary
  • Tertiary
  • Quaternary

Pregunta 11

Pregunta
Why does a protein take on the shapes shown in this image?
Respuesta
  • Because it contains amino acids
  • Because nonadjacent R groups interact with each other
  • Because the backbone of the protein is polar
  • Because it looks fabulous

Pregunta 12

Pregunta
Which statement best explains why proteins can serve so many different functions?
Respuesta
  • They are soluble in water.
  • They vary in terms of chain length (i.e., the number of amino acids present).
  • They contain sulfur.
  • They have different shapes.

Pregunta 13

Pregunta
A mystery molecule contains nitrogen. What is the molecule most likely to be?
Respuesta
  • Cellulose
  • A steroid
  • A protein
  • A trigylceride

Pregunta 14

Pregunta
A mystery molecule is added to a test tube of water, and it floats to the top. What is the molecule most likely to be?
Respuesta
  • A triglyceride
  • Starch
  • Glucose
  • A protein

Pregunta 15

Pregunta
A mystery molecule quickly dissolves in water. It has a relatively low molecular weight (as compared to other biological molecules). What is the molecule most likely to be?
Respuesta
  • A protein
  • A steroid
  • A monosaccharide
  • Starch

Pregunta 16

Pregunta
The R group of the amino acid serine is highly polar. The R group of the amino acid leucine is highly nonpolar. Where would you expect to find these amino acids in a globular protein that is normally dissolved in water?
Respuesta
  • Both serine and leucine would be in the interior of the protein.
  • Both serine and leucine would be on the exterior of the protein.
  • Leucine would be on the interior, and serine would be on the exterior of the protein.
  • Serine would be on the interior, and leucine would be on the exterior of the protein.

Pregunta 17

Pregunta
Which of the following is NOT a monomer?
Respuesta
  • Amino acid
  • Monosaccharide
  • Steroid
  • All of these are monomers

Pregunta 18

Pregunta
Figure 1 illustrates a dipeptide, created through dehydration synthesis. At which bond would water need to be added to achieve hydrolysis of the peptide, back to its component amino acids?
Respuesta
  • Bond A
  • Bond B
  • Bond C
  • Bond D

Pregunta 19

Pregunta
The functionality of a protein is determined by its shape when in its native conformation. The native conformation of a protein is determined by the set of amino acids that comprise the protein's sequence. A certain protein consists of 325 amino acids. What could be the result if one of the amino acids in this protein were changed?
Respuesta
  • The primary structure of the protein would not be altered but its tertiary structure and function would be altered.
  • The tertiary structure would be changed but the protein's function would not be affected.
  • The primary structure, tertiary structure, and the biological function would be altered.
  • There would be no change to the structure or the function of the protein.

Pregunta 20

Pregunta
Which statement is true of the process shown in this image?
Respuesta
  • A polymer is generated.
  • Hydrolysis is occurring.
  • A peptide bond is broken in the process.
  • More than one of these statements is true.
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