Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 6071
TLS Online TPP Program

#Question id: 7271

In drosophila, Head formation required higher Bicoid concentrations than thorax formation, because

#Unit 5. Developmental Biology
  1. The promoters of such head specific genes would have high-affinity binding sites for Bicoid protein, causing them to be activated only at extremely high concentrations of Bicoid.
  2. The promoters of such head specific genes would have low-affinity binding sites for Bicoid protein, causing them to be activated only at extremely high concentrations of Bicoid.
  3. The promoters of such head specific genes would have high- affinity binding sites for bicoid protein, causing them to be activated only at extremely low concentratrations of bicoid.
  4. The promoters of such head specific genes would have low-affinity binding sites for Bicoid protein, causing them to be activated only at extremely low concentrations of Bicoid.
More Questions
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: 2005

#Unit 4. Cell Communication and Cell Signaling

A transfusion of type A blood given to a person who has type O blood would result in which of the following?
TLS Online TPP Program

#Question id: 2006

#Unit 4. Cell Communication and Cell Signaling

In Cases 1 and 2 in the table, the mothers would be able, if needed, to supply blood to the newborn even 7-9 months after birth; the same would not be true for Case 3. Why?
TLS Online TPP Program

#Question id: 2007

#Unit 4. Cell Communication and Cell Signaling

In which of the cases could the mother exhibit an anti-Rh-factor reaction to the developing fetus?
TLS Online TPP Program

#Question id: 2008

#Unit 4. Cell Communication and Cell Signaling

An immune response to a tissue graft will differ from an immune response to a bacterium because
TLS Online TPP Program

#Question id: 2009

#Unit 4. Cell Communication and Cell Signaling

A child is diagnosed with DiGeorge syndrome (DGS). With which of the following would the child have serious immunological problems?