Practice Questions

TLS Online TPP Program

#Question id: 5227

One of the characteristics of retrotransposons is that

#Unit 11. Evolution and Behavior

they code for an enzyme that synthesizes DNA using an RNA template.
they are found only in animal cells.
they generally move by a cut-and-paste mechanism.
they contribute a significant portion of the genetic variability seen within a population of gametes.

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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?

c. preosteoclasts

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

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.