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TLS Online TPP Program

#Question id: 14808

Which of the following statements is true ?

#Unit 4. Cell Communication and Cell Signaling
  1. A hapten can stimulate antibody formation but cannot combine with antibody molecules.
  2. A large protein antigen generally can combine with many different antibody molecules.
  3. All antigens are also immunogens.
  4. MHC genes do not  play a major role in determining the degree of immune responsiveness to an antigen.
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TLS Online TPP Program

#Question id: 2004

#Unit 4. Cell Communication and Cell Signaling

A bone marrow transplant may not be appropriate from a given donor (Jane) to a given recipient (Janeʹs cousin Bob), even though Jane has previously given blood for one of Bobʹs needed transfusions. Which of the following might account for this?
TLS Online TPP Program

#Question id: 5642

#Unit 5. Developmental Biology

One of the earliest events in arabidopsis development is formation of the _____ axis, in response to a gradient of _____.
TLS Online TPP Program

#Question id: 31386

#Unit 4. Cell Communication and Cell Signaling

Which of the following ion uptake into the presynaptic terminal causes release of the neurotransmitter?
TLS Online TPP Program

#Question id: 9229

#Unit 9. Diversity of Life Forms

Which of the following is a generally accurate statement about the current research regarding forest fragmentation?
TLS Online TPP Program

#Question id: 29506

#Unit 6. System Physiology – Plant

The active principle in foxglove (Digitalis sp.) is cardinolide digitoxin  is a
a. cardiac glycoside 
b. that activate ATPase activity 
c. that inhibits ATPase activity 
d. can increase myocardial contraction

Which of the following is not true regarding digitoxin