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TLS Online TPP Program

#Question id: 28784

Cytochalasin D,  a fungal alkaloid, depolymerizes actin filaments by___

#Unit 2. Cellular Organization
  1. binding to the (+) end of G-actin
  2. binding to the (+) end of F-actin
  3. binding to the (-) end of G-actin
  4. binding to the (-) end of F-actin
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TLS Online TPP Program

#Question id: 4543

#Unit 3. Fundamental Processes

Control of the activator NtrC- In that case, the signal (low ammonia levels) induces a kinase that phosphorylates NtrC. This is type of

A. Indirect signaling

B. Direct signaling

C. Is an example of a signal transduction pathway
TLS Online TPP Program

#Question id: 33329

#Unit 2. Cellular Organization

In gram-negative bacteria such as Escherichia coli, cross-links form between:
TLS Online TPP Program

#Question id: 27132

#Unit 7. System Physiology – Animal

Which of the following is not essential for normal biosynthesis of thyroid hormones?
TLS Online TPP Program

#Question id: 31245

#Unit 5. Developmental Biology

Human polysyndactyly syndrome is caused by:
TLS Online TPP Program

#Question id: 11777

#Unit 10. Ecological Principles

Some of the species of stalk-eyed flies are sexually dimorphic, with males having eye stalks up to twice as long as those in females. This gender difference in eye span results from selection by females on the expression of this trait in males, a process called __________.