TLS Online TPP Program

#Question id: 29004


Inhibition of PTH secretion by a step manner, select the correct sequences of PTH inhibition?

#Unit 7. System Physiology – Animal
  1. Ca2+ binds to the receptor → extracellular Ca2+ concentration is increased → activates PLC → inhibits PTH secretion

  2. intracellular Ca2+ concentration is increased → binds to the receptor→ activates PLC → inhibits PTH secretion

  3. extracellular Ca2+ concentration is increased → binds to the receptor→ activates PLC → inhibits PTH secretion

  4. extracellular Ca2+ is decreased decreased → Ca2+ binding to the receptor  → inhibits PTH secretion
More Questions
TLS Online TPP Program

#Question id: 10273

#Unit 6. System Physiology – Plant

The existence of different pathways that serve a similar function and can replace each other without a clear loss in function is called,

TLS Online TPP Program

#Question id: 10274

#Unit 6. System Physiology – Plant

In plastids, a partial glycolysis occurs that produces metabolites for plastidial biosynthetic reactions, which of the following is not synthesized in the plastid?

TLS Online TPP Program

#Question id: 10275

#Unit 6. System Physiology – Plant

In the initial phase of glycolysis, each hexose unit is phosphorylated twice and then split, producing two molecules of triose phosphate, in these reactions included irreversible reaction. How much irreversible reaction is performed in the glycolytic pathway through in this series of reactions?

TLS Online TPP Program

#Question id: 10276

#Unit 6. System Physiology – Plant

In glycolysis, the enzyme glyceraldehyde 3-phosphate dehydrogenase catalyzes;

TLS Online TPP Program

#Question id: 10277

#Unit 6. System Physiology – Plant

Each of the nine glycolytic intermediates between glucose and pyruvate is phosphorylated. The phosphoryl groups seem to have many functions such as,

a) The plasma membrane generally lacks transporters for phosphorylated sugars, the phosphorylated glycolytic intermediates cannot leave the cell

b) After the initial phosphorylation, further energy is necessary to retain phosphorylated intermediates in the cell, despite the large difference in their intracellular and extracellular concentrations

c) Phosphoryl groups are essential components in the enzymatic conservation of metabolic energy, Energy released in the breakage of phosphoanhydride bonds is partially conserved in the formation of phosphate esters such as glucose 6-phosphate

d) Binding energy resulting from the binding of phosphate groups to the active sites of enzymes lowers the activation energy and increases the specificity of the enzymatic reactions

which of the following functions shows Importance of Phosphorylated Intermediates?

TLS Online TPP Program

#Question id: 10278

#Unit 6. System Physiology – Plant

The type of ATP synthesis, traditionally referred to as substrate-level phosphorylation involves the direct transfer of a phosphate group, which reactions perform substrate-level phosphorylation?

a) Conversion of Glyceraldehyde 3-phosphate to 1,3-Bisphosphoglycerate

b) Conversion of Phosphoenol pyruvate to pyruvate

c) Conversion of Fructose 6-phosphate to Fructose 1,6-bisphosphate

d) Conversion of 1,3-Bisphosphoglycerate to 3-Phosphoglycerate

Find the correct one.