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TLS Online TPP Program

#Question id: 1980

For one person to produce over a million different antibody molecules could not possibly require over a million different genes. Instead, this variability is accounted for by which processes?

#Unit 4. Cell Communication and Cell Signaling

  1. alternative splicing of exons after transcription

  2. increased rate of mutation in the RNA molecules

  3. DNA rearrangements followed by alternative splicing of the transcripts

  4. DNA rearrangements in the thymus cells

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TLS Online TPP Program

#Question id: 1154

#Unit 4. Cell Communication and Cell Signaling

Which of the following events do not occur during the epinephrine-stimulated conversion of glycogen to glucose-1-phosphate?
TLS Online TPP Program

#Question id: 19165

#Unit 13. Methods in Biology

A pull down affinity chromatography assay is used for the investigation of
TLS Online TPP Program

#Question id: 1201

#Unit 4. Cell Communication and Cell Signaling

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?
TLS Online TPP Program

#Question id: 19283

#Unit 9. Diversity of Life Forms

Which of the following most closely represents the male gametophyte of seed-bearing plants? 
TLS Online TPP Program

#Question id: 11205

#Unit 7. System Physiology – Animal

What would probably happen if a long neuron had one continuous myelin sheath down the length of the axon with no nodes of Ranvier?