CHEM Exam Ch 13 Test Bank CERTIFICATION GUIDE
FOR 2025/2026 TESTS|MOST COMMON
QUESTIONS WITH CORRECTLY VERIFIED ANSWERS
(LATEST QUIZZES) |ALREADY A+
GRADED|GUARANTEED PASS
Which of the following is not involved in the specificity of signal transduction?
A) Interactions between receptor and signal molecules
B) Location of receptor molecules
C) Structure of receptor molecules
D) Structure of signal molecules
E) Transmembrane transport of signal molecules by receptor molecules - E
Scatchard analysis can provide information on:
A) enzyme cascades.
B) enzyme mechanisms.
C) gated ion channels.
D) protein phosphorylation.
E) receptor-ligand interactions. - E
Which of the following statements concerning receptor enzymes is correct?
A) They are not usually membrane-associated proteins.
B) They contain an enzyme activity that acts upon a cytosolic substrate.
, C) They contain an enzyme activity that acts upon the extracellular ligand.
D) They have a ligand-binding site on the cytosolic side of the membrane.
E) They have an active site on the extracellular side of the membrane. - B
Guanyl cyclase receptor enzymes:
A) are all membrane-spanning proteins.
B) are examples of ligand-gated ion channels.
C) catalyze synthesis of a phosphate ester.
D) catalyze synthesis of a phosphoric acid anhydride.
E) require hydrolysis of ATP in addition to GTP. - C
Serpentine receptors:
A) are examples of G (GTP-binding) regulatory proteins.
B) are mainly involved in the regulation of ion transport.
C) are present in prokaryotic cells but not in eukaryotic cells.
D) are present in the nucleus and affect gene expression.
E) have multiple membrane-spanning helical domains. - E
Cholera and pertussis toxins are:
A) enzyme inhibitors.
B) enzyme modifiers.
C) enzymes.
D) G protein signal transduction disrupters.
E) all of the above. - E
Protein kinase A (PKA) is:
FOR 2025/2026 TESTS|MOST COMMON
QUESTIONS WITH CORRECTLY VERIFIED ANSWERS
(LATEST QUIZZES) |ALREADY A+
GRADED|GUARANTEED PASS
Which of the following is not involved in the specificity of signal transduction?
A) Interactions between receptor and signal molecules
B) Location of receptor molecules
C) Structure of receptor molecules
D) Structure of signal molecules
E) Transmembrane transport of signal molecules by receptor molecules - E
Scatchard analysis can provide information on:
A) enzyme cascades.
B) enzyme mechanisms.
C) gated ion channels.
D) protein phosphorylation.
E) receptor-ligand interactions. - E
Which of the following statements concerning receptor enzymes is correct?
A) They are not usually membrane-associated proteins.
B) They contain an enzyme activity that acts upon a cytosolic substrate.
, C) They contain an enzyme activity that acts upon the extracellular ligand.
D) They have a ligand-binding site on the cytosolic side of the membrane.
E) They have an active site on the extracellular side of the membrane. - B
Guanyl cyclase receptor enzymes:
A) are all membrane-spanning proteins.
B) are examples of ligand-gated ion channels.
C) catalyze synthesis of a phosphate ester.
D) catalyze synthesis of a phosphoric acid anhydride.
E) require hydrolysis of ATP in addition to GTP. - C
Serpentine receptors:
A) are examples of G (GTP-binding) regulatory proteins.
B) are mainly involved in the regulation of ion transport.
C) are present in prokaryotic cells but not in eukaryotic cells.
D) are present in the nucleus and affect gene expression.
E) have multiple membrane-spanning helical domains. - E
Cholera and pertussis toxins are:
A) enzyme inhibitors.
B) enzyme modifiers.
C) enzymes.
D) G protein signal transduction disrupters.
E) all of the above. - E
Protein kinase A (PKA) is:
