TLS Online TPP Program

#Question id: 1084


Which observation suggested to Sutherland the involvement of a second messenger in epinephrine's effect on liver cells?

#Unit 4. Cell Communication and Cell Signaling
  1. Receptor studies indicated that epinephrine was a ligand.

  2. Glycogen breakdown was observed only when epinephrine was administered to intact cells.

  3. Glycogen breakdown was observed when epinephrine and glycogen phosphorylase were combined in a cell-free system.

  4. Epinephrine was known to have different effects on many types of cells.

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TLS Online TPP Program

#Question id: 10333

#Unit 6. System Physiology – Plant

Four elements, oxygen, carbon, and hydrogen and nitrogen are the major components of most organic compounds, which of the following elements are more abundant in plants ?

TLS Online TPP Program

#Question id: 10334

#Unit 6. System Physiology – Plant

N2 combines with hydrogen to form ammonia under elevated temperature (about 200°C) and high pressure (about 200 atmospheres) and in the presence of a metal catalyst (usually iron). The extreme conditions are required to overcome the high activation energy of the reaction. This nitrogen fixation reaction, called

TLS Online TPP Program

#Question id: 10335

#Unit 6. System Physiology – Plant

plants can store high levels of nitrate, and they can translocate it from tissue to tissue without deleterious effect. Yet if livestock or humans consume plant material that is high in nitrate, they may suffer with,

TLS Online TPP Program

#Question id: 10335

#Unit 6. System Physiology – Plant

plants can store high levels of nitrate, and they can translocate it from tissue to tissue without deleterious effect. Yet if livestock or humans consume plant material that is high in nitrate, they may suffer with,

TLS Online TPP Program

#Question id: 10337

#Unit 6. System Physiology – Plant

In biological nitrogen fixation, the process of nitrification by organism respective bacteria A--which convert the ammonia to nitrite and B--- further converted into nitrate in the soil by their respective A and B bacteria known as;

TLS Online TPP Program

#Question id: 10338

#Unit 6. System Physiology – Plant

Nitrate from the soil solution actively absorb by Plant roots via several low- and high-affinity transporters known as