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TLS Online TPP Program

#Question id: 13159

How signaling is involved in ensuring that yeast cells fuse only with cells of the opposite mating type?

#Unit 4. Cell Communication and Cell Signaling
  1. The two cells of opposite mating type (a and alpha) each secrete a certain signaling molecule, which can only be bound by receptors carried on cells of the opposite mating type. Thus, the a mating factor cannot bind to another a cell and cause it to grow toward the first a cell. Only an alpha cell can “receive” the signaling molecule and respond by directed growth.
  2. The two cells of opposite mating type (a and alpha) each secrete a certain signaling molecule, which can only be bound by receptors carried on cells of the same mating type. Thus, the a mating factor can bind to another a cell and cause it to grow toward the first a cell.
  3. The two cells of opposite mating type (a and alpha) each proteins attached to the plasma membrane of one cell can interact directly with cell-surface receptors on adjacent cells. Thus, the a mating factor can directly bind to another a cell and cause it to grow.
  4. The two cells of opposite mating type (a and alpha) each respond to substances that they themselves release.
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TLS Online TPP Program

#Question id: 10978

#Unit 7. System Physiology – Animal

Which of the following events occurs at the end of the period of ventricular ejection?
TLS Online TPP Program

#Question id: 3765

#Unit 3. Fundamental Processes

Which of the following types of molecules help to hold the DNA strands apart while they are being replicated?
TLS Online TPP Program

#Question id: 5187

#General Aptitude

The number 111,111,111,111 is divisible by.
TLS Online TPP Program

#Question id: 24652

#Unit 2. Cellular Organization

The mechanism postulated for P-type ATPases takes into account the large conformational changes and the phosphorylation dephosphorylation of the critical:
TLS Online TPP Program

#Question id: 4094

#Unit 3. Fundamental Processes

The accompanying figure depicts the map of a part of E. coli genome harboring the lac operon.

 lac mRNA would hybridize to which of the following DNA?

1) lac I; 2) lac 0; 3) lac Z; 4) lac Y; 5) lac A