Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 53277
TLS Online TPP Program

#Question id: 28214

Specification of different mesodermal cell types in the frog Xenopus laevis by activin, a paracrine factor of the TGF-beta family. Which of the following observation is correct at the slightly lower concentration of activin?

#Unit 5. Developmental Biology
  1. activate the Xbra gene and instructed the cell to become dorsal-most structures
  2. activate the Xbra gene and instructed the cell to become muscle
  3.  activate goosecoid gene and instructed the cell to become the frog’s dorsal-most structures
  4. activate goosecoid gene and instructed the cell to become the frog’s ventral-most structures
More Questions
TLS Online TPP Program

#Question id: 1130

#Unit 4. Cell Communication and Cell Signaling

In muscle cells, glycogen phosphorylase kinase is activated by

a. Ca2+.           b. diacylglycerol.   c. nitric oxide.       d. protein kinase A.    
TLS Online TPP Program

#Question id: 24285

#Unit 4. Cell Communication and Cell Signaling

Adherens junctions: 
TLS Online TPP Program

#Question id: 3518

#Unit 8. Inheritance Biology

Assume that the trihybrid cross AA BB rr X aa bb RR is made in a plant species in which A and B are dominant but there is incomplete dominance between R and r. Consider the F2 progeny from this cross, and assume independent assortment. The phenotypes appear in this F2 progeny?
TLS Online TPP Program

#Question id: 18892

#Unit 13. Methods in Biology

The greatest resolution in light microscopy can be obtained with
TLS Online TPP Program

#Question id: 12895

#General Aptitude

Surface areas of three adjacent faces of a cuboid are p, q, r. Its volume is