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TLS Online TPP Program

#Question id: 7107

What would be the effect on the timing of somite formation, if a piece of the pre-somitic mesoderm of a chick embryo is rotated by 180° and reinserted in its original position?

#Unit 5. Developmental Biology
  1. there would be no effect because the embryo would regulate and development would proceed normally
  2. antero-posterior development would be blocked at that point, and more posterior structures would fail to form
  3. the rotated mesoderm will reverse the gradient of somite formation, so that somite formation posterior to the rotated mesoderm will begin in the posterior and move forward to meet the previously formed somites
  4. the timing of somite formation will be reversed in the rotated block only, proceeding from posterior to anterior, but the rest of the somites will form in a normal fashion, proceeding from anterior to posterior
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TLS Online TPP Program

#Question id: 13555

#Unit 6. System Physiology – Plant

Water Loss Is Also Regulated by the Pathway Resistance
TLS Online TPP Program

#Question id: 13556

#Unit 6. System Physiology – Plant

The Guard Cells Have Specialized Features are
a) guard cells have a characteristic dumbbell shape, with bulbous ends
b) guard cells are always flanked by a pair of differentiated epidermal cells called subsidiary cells
c) guard cells are present in organs from more primitive plants, such as the liverworts and the mosses
d) dicot plants and nongrass monocots, kidney-shaped guard cells have an elliptical contour with the pore at its center
Which of the following combination of above statement is TRUE?
TLS Online TPP Program

#Question id: 13980

#Unit 6. System Physiology – Plant

The alignment of the cellulose microfibrils in the guard cell is
TLS Online TPP Program

#Question id: 13981

#Unit 6. System Physiology – Plant

The Transpiration Ratio Measures the Relationship between Water Loss and Carbon Gain, which of the following statements about transpiration ratio is NOT true?
TLS Online TPP Program

#Question id: 14079

#Unit 1. Molecules and their Interaction Relevant to Biology

Which DNA is favored in many solutions that are relatively devoid of water with the base pair per turn of
A. B DNA
B. A DNA
C. Z DNA
D. 10 bp per turn
E. 11 bp per turn
F. 12 bp per turn
Which of the following combination is correct?
TLS Online TPP Program

#Question id: 14080

#Unit 1. Molecules and their Interaction Relevant to Biology

 Hairpin and cruciform structures are formed when the DNA sequence have