TLS Online TPP Program

#Question id: 3041


Which statement about gram-negative bacteria is correct?

#SCPH28 | Zoology
  1.  Penicillins are the best antibiotics to use against them.

  2. They often possess an outer membrane containing toxic lipopolysaccharides.

  3. Their chromosomes are composed of DNA tightly wrapped around large amounts of histone proteins.

  4. Their cell walls are primarily composed of peptidoglycan.

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TLS Online TPP Program

#Question id: 1123

#SCPH28 | Zoology

Epinephrine can be what kind of signaling molecule?

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

TLS Online TPP Program

#Question id: 1124

#SCPH01 Biochemistry

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: 1124

#SCPH28 | Zoology

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

#SCPH01 Biochemistry

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: 1125

#SCPH28 | Zoology

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

#SCPH01 Biochemistry

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.