A vector contains the nitR gene under the control of the nitA promoter in a separate operon, the expression of vector is used, upon the addition of the inducer. The inducer–NitR protein complex activates the transcription of both the target gene(s) and nitR and increased level of NitR results in a very high level of production of the target protein(s). Which type of inducer using by nitR?

TLS Online TPP Program

#Question id: 22967

#Unit 7. System Physiology – Animal

Which of the following statement are true about Osteoprotegerin?

a. A cytokine that promotes bone resorption.

b. A cytokine that inhibits bone resorption.

c. Produced by Osteoblasts

d. Produced by osteoclast

TLS Online TPP Program

#Question id: 22966

#Unit 7. System Physiology – Animal

Which cells contains receptor for PTH?

a. osteoclasts

b. osteoblasts

c. preosteoclasts

d. osteocytes

TLS Online TPP Program

#Question id: 22965

#Unit 7. System Physiology – Animal

Two osteoblast proteins responsible for osteoclast maturation; 

a. Receptor activator for nuclear factor κ-B ligand  

b. Macrophage colony-stimulating factor

c. Osteocalcin

d. Osteoprotegrin

TLS Online TPP Program

#Question id: 22964

#Unit 7. System Physiology – Animal

The receptor for PTH is coupled, via a 

TLS Online TPP Program

#Question id: 22963

#Unit 7. System Physiology – Animal

What are the 3 targets of parathyroid hormone?

TLS Online TPP Program

#Question id: 22962

#Unit 7. System Physiology – Animal

What is the relationship between calcium and PTH? 

a. When extracellular Ca2+ is decreased àCa2+ binding to the receptor àinhibits PTH secretion

b. When extracellular Ca2+ concentration is increased à Ca2+ binds to the receptor à activates phospholipase C àinhibits PTH secretion

c. When extracellular Ca2+ is decreased à Ca2+ doesn’t binds to the receptor àstimulates PTH secretion

d. When extracellular Ca2+ concentration is increased à Ca2+ binds to the receptor à activates phospholipase C àstimulates PTH secretion.