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TLS Online TPP Program

#Question id: 1201

Epinephrine binds to the same type of receptors in liver, fat, and smooth muscle cells. Yet in liver, glycogen breaks down; in fat, triacylglycerols break down; and smooth muscle cells relax. How can the same hormone produce three such different responses?

#Unit 4. Cell Communication and Cell Signaling

  1. The same receptors activate three different second messengers.

  2. The same second messengers activate three different intracellular cascades.

  3. The same enzyme that breaks down glycogen also breaks down fat and relaxes muscle.

  4. None of the above.

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TLS Online TPP Program

#Question id: 26483

#Unit 2. Cellular Organization

lac repressor binds to
TLS Online TPP Program

#Question id: 4900

#Unit 8. Inheritance Biology

The chlorophyll-deficient types occur in a particular plant species due to a mutation in the DNA of the chloroplast itself, Female cytoplasm chlorophyll-deficient organisms crossed with male normal chlorophyll will produce progeny
TLS Online TPP Program

#Question id: 3623

#Unit 8. Inheritance Biology

To carry out a complementation test, which of the following statement is correct?
TLS Online TPP Program

#Question id: 2235

#Unit 2. Cellular Organization

The generation and maintenance of a membrane electric potential requires which of the following:

a. active pumping of ions       

b. ion-specific membrane channel proteins

c. ATP                                    

d. a generally permeable membrane
TLS Online TPP Program

#Question id: 28777

#Unit 2. Cellular Organization

Which of the following statements is incorrect about the Globular or G-actin molecules ?