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TLS Online TPP Program

#Question id: 14838

Sequence of amphibian lens induction postulated by experiments on embryos of the frog Xenopus laevis ; EXCEPT

#Unit 5. Developmental Biology
  1. Unidentified inducers (possibly from the foregut endoderm and cardiac mesoderm) cause the synthesis of the Otx2 transcription factor in the head ectoderm during the late neurula stage.
  2. As the neural folds rise, inducers from the anterior neural plate (including the region that will form the retina) induce Pax6 expression in the anterior ectoderm that can form lens tissue.
  3. As the neural folds rise, inducers from the anterior neural plate (including the region that will form the retina) induce Pax6 expression in the anterior ectoderm that can form lens tissue.
  4. The optic vesicle secretes BMP and FGF family paracrine factors, which induce the synthesis of the Sox transcription factors and initiate observable lens formation

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TLS Online TPP Program

#Question id: 13109

#Unit 13. Methods in Biology

With the help of DNA fingerprinting which can be used to determine paternity. There are three babies (Baby A, Baby B and Baby C) in a maternity ward, and three sets of confused and worried parents. (Father and Mother #1 are a couple, as are Father and Mother #2, and Father and Mother #3.) 
You do each PCR reaction on chromosome 15 and load each one into a separate well of an agarose gel, and then run the gel.
 

 which number of repeats did Baby C inherit from his mother?
TLS Online TPP Program

#Question id: 13110

#Unit 13. Methods in Biology

With the help of DNA fingerprinting which can be used to determine paternity. There are three babies (Baby A, Baby B and Baby C) in a maternity ward, and three sets of confused and worried parents. (Father and Mother #1 are a couple, as are Father and Mother #2, and Father and Mother #3.) 
You do each PCR reaction on chromosome 15 and load each one into a separate well of an agarose gel, and then run the gel.
 

 
Match the babies up with their actual parents.
 
BABYPARENTS
I. Baby Aa) Father and Mother #1
II. Baby Bb) Father and Mother #2
III. Baby Cc) Father and Mother #3
TLS Online TPP Program

#Question id: 15181

#Unit 13. Methods in Biology

In which kind of electrophoresis, analyte can move in either direction?
1. Gel Electrophoresis
2. PAGE
3. Free Solution
4. Capillary
TLS Online TPP Program

#Question id: 15182

#Unit 13. Methods in Biology

Which of the following types of effect are responsible for lowering the efficiency of electrophoresis?
TLS Online TPP Program

#Question id: 15183

#Unit 13. Methods in Biology

When in a gel more Joule heat is produced than can be dissipated, the temperature in the middle of the gel is higher than at the lateral edges. This causes higher mobility of the ions in the center, resulting in an uneven distribution of the zones. The zones bend up at the two lateral sides, causing
TLS Online TPP Program

#Question id: 15184

#Unit 13. Methods in Biology

Phenomenon of Electroendosmosis is largely applicable in
A. Gel Electrophoresis
B. PAGE
C. Free Solution
D. Capillary