Which of the following terms best describes this molecule?
Amino Acid
Monosaccharide
Monomer
More than one of these terms is appropriate
What is the function of this molecule?
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.
Which of the following molecules are made of this type of monomer?
Glycogen
Cellulose
Starch
All of these molecules are made of this type of monomer
What process is occurring in this image?
Digestion
Hydrolysis
Dehydration synthesis
Catalysis
In this image, a ________________________ is being produced through the process of _______________________________________.
Disaccharide ... dehydration synthesis
Disaccharide ... hydrolysis
Polysaccharide ... dehydration synthesis
Polysaccharide ... hydrolysis
What do these molecules have in common?
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.
What do all lipids have in common?
They are all found in cell membranes.
They are all at least partially hydrophobic (nonpolar).
They all contain three hydrocarbon fatty acid chains.
What is this molecule?
A monosaccharide
A lipid
An amino acid
A protein
What is the difference between 'A' and 'B'?
'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'.
Which level of protein structure is shown in this image?
Primary
Secondary
Tertiary
Quaternary
Why does a protein take on the shapes shown in this image?
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
Which statement best explains why proteins can serve so many different functions?
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.
A mystery molecule contains nitrogen. What is the molecule most likely to be?
A steroid
A trigylceride
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?
A triglyceride
Glucose
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?
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?
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.
Which of the following is NOT a monomer?
Amino acid
Steroid
All of these are monomers
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?
Bond A
Bond B
Bond C
Bond D
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?
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.
Which statement is true of the process shown in this image?
A polymer is generated.
Hydrolysis is occurring.
A peptide bond is broken in the process.
More than one of these statements is true.