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TLS Online TPP Program

#Question id: 11954

Folic acid supplements have become especially important for pregnant women because ________.

#Unit 7. System Physiology – Animal
  1. folic acid supplies vitamins that only pregnant women can use
  2. the fetus makes high levels of folic acid

  3. folic acid deprivation is associated with neural tube defects in a fetus

  4. folic acid deprivation is a cause of heart abnormalities in a newborn
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TLS Online TPP Program

#Question id: 11582

#Unit 7. System Physiology – Animal

Following a stressful stimulus, the fight-or-flight response will cause ________.
TLS Online TPP Program

#Question id: 9278

#Unit 6. System Physiology – Plant

Bilin pigments are open-chain tetrapyrroles found in antenna structures known as phycobilisomes that occur in
TLS Online TPP Program

#Question id: 32430

#Unit 2. Cellular Organization

Muscle contraction depends on two processes: 
a. Filament sliding, driven by the ATPase domain of myosin 
b. Ca2+ pumping, driven by the Ca2+-pump
c. Filament sliding, driven by the ATPase domain of actin
d. Na+ pumping, driven by the Na+- K+ pump
TLS Online TPP Program

#Question id: 1160

#Unit 4. Cell Communication and Cell Signaling

Signal amplification is an important part of GPCR-mediated signaling. Which of the following steps do NOT directly amplify the signal?
TLS Online TPP Program

#Question id: 3812

#Unit 3. Fundamental Processes

The mechanism of DNA replication is studied in an E. coli replication fork. Which is a characteristic of this replication fork?