TLS Online TPP Program

#Question id: 2089


What type of single-pass membrane protein would contain a hydrophobic membrane spanning alpha-helix?

#Section 2: General Biology
  1. transmembrane protein

  2. integral membrane protein

  3. peripheral protein

  4. transmembrane protein and integral membrane protein

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TLS Online TPP Program

#Question id: 1121

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following provides the best evidence that cell-signaling pathways evolved early in the history of life?

TLS Online TPP Program

#Question id: 1122

#Section 3: Genetics, Cellular and Molecular Biology

In endocrine signaling, the signaling molecule.

TLS Online TPP Program

#Question id: 1123

#Section 3: Genetics, Cellular and Molecular Biology

Epinephrine can be what kind of signaling molecule?

a. autocrine      b. direct contact  c. endocrine d. paracrine

TLS Online TPP Program

#Question id: 1124

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following is (are) intracellular second messengers?

a. Ca2+                        b. cAMP          c. epinephrine             

d. protein kinase A      e. protein kinase C

TLS Online TPP Program

#Question id: 1125

#Section 3: Genetics, Cellular and Molecular Biology

Examples of G protein–coupled receptors include

a. rhodopsin receptor.             b. β-adrenergic receptor.

c. insulin receptor.                   d. acetylcholine receptor.

TLS Online TPP Program

#Question id: 1126

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following statement(s) is (are) true of the α subunit of a G protein?

a. It physically associates with the receptor.              

b. It binds GDP.

c. It binds GTP.                     

d. It is a transmembrane protein.