BIO 151 CERTIFICATION EVALUATION FULL
QUESTIONS AND SOLUTIONS VERIFIED
PREPARATION MATERIAL
●● Indicate whether each of the following statement about protein
structure is true or false.
Answer: 1. A distinctive and recurrent sequence of structural elements
within a protein, such as helix-turn-helix, is called a domain.
-False
2. Many proteins are composed of several different regions that are
specialized to carry out specific functions.
-True
3. Specific functional regions within a protein are called motifs.
-False
4. As a polypeptide chain folds, each domain takes its proper shape more
or less independently of the others.
-True
5. If we replace one domain of a protein with a domain from a different
protein using molecular biology techniques, then the entire protein will
become inactive
-False
, ●● Indicate whether each of the following statements about protein
structure is true or false.
Answer: 1. If a protein's environment is altered, the protein Amy change
its shape or even unfold completely, a process called dissociation.
-False
2. Proteins can denature when the pH, temp., or ionic concentration of
the surrounding solutions change.
-True
3. Denature proteins are usually biologically active.
-False
4. When normal environmental conditions are reestablished after protein
denaturation, almost all proteins can spontaneously refold into their
natural shape.
-False
5. If the 3-D structure of a protein depends only on it primary structure
and the surrounding environmental conditions, then when the protein is
denatured. and. subsequently returned to its native conditions it will
spontaneously refold back to its native structure.
-True
6. Proteins have a narrow range of conditions in which they fold
properly; outside the range, proteins tend to renature.
-False
7. Some proteins require other proteins called chaperones in order to
correctly fold into their normal 3-D shape.
-True
QUESTIONS AND SOLUTIONS VERIFIED
PREPARATION MATERIAL
●● Indicate whether each of the following statement about protein
structure is true or false.
Answer: 1. A distinctive and recurrent sequence of structural elements
within a protein, such as helix-turn-helix, is called a domain.
-False
2. Many proteins are composed of several different regions that are
specialized to carry out specific functions.
-True
3. Specific functional regions within a protein are called motifs.
-False
4. As a polypeptide chain folds, each domain takes its proper shape more
or less independently of the others.
-True
5. If we replace one domain of a protein with a domain from a different
protein using molecular biology techniques, then the entire protein will
become inactive
-False
, ●● Indicate whether each of the following statements about protein
structure is true or false.
Answer: 1. If a protein's environment is altered, the protein Amy change
its shape or even unfold completely, a process called dissociation.
-False
2. Proteins can denature when the pH, temp., or ionic concentration of
the surrounding solutions change.
-True
3. Denature proteins are usually biologically active.
-False
4. When normal environmental conditions are reestablished after protein
denaturation, almost all proteins can spontaneously refold into their
natural shape.
-False
5. If the 3-D structure of a protein depends only on it primary structure
and the surrounding environmental conditions, then when the protein is
denatured. and. subsequently returned to its native conditions it will
spontaneously refold back to its native structure.
-True
6. Proteins have a narrow range of conditions in which they fold
properly; outside the range, proteins tend to renature.
-False
7. Some proteins require other proteins called chaperones in order to
correctly fold into their normal 3-D shape.
-True
