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TLS Online TPP Program

#Question id: 20006

Under stress it is made directly from glutamate, the first two reactions of the pathway being catalyzed by a single enzyme 

#Unit 12. Applied Biology
  1. ∆1-pyrroline-5-carboxylate synthetase
  2. ∆1-pyrroline-5-carboxylate lyase
  3. ∆1-pyrroline-5-carboxylate dehydrogenase
  4. ∆1-pyrroline-5-hydroxyl synthetase
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TLS Online TPP Program

#Question id: 26796

#Unit 8. Inheritance Biology

50 meiocyte has 5% recombinant frequency in their gametes A and B, then how many meiocyte undergo  single crossing over 
TLS Online TPP Program

#Question id: 18906

#Unit 13. Methods in Biology

A good vector must have the following properties.
a) It should be able to replicate autonomously.
b) A vector should be ideally less than 10 kb in size
c) The vector should be easy to isolate and purify.
d)  vector should have suitable marker genes that allow easy detection and/or selection of the transformed host cells.
e) it should a multiple cloning site
TLS Online TPP Program

#Question id: 5144

#Unit 5. Developmental Biology

Following statements regarding to noncanonical wnt pathways.

A. The planar cell polarity, or PCP, pathway functions to regulate the actin and microtubule cytoskeleton, thus influencing cell shape, and often results in bipolar protrusive behaviors necessary for a cell to migrate.

B. Wnts (such as Wnt5a and Wnt11) can activate Disheveled by binding to a different receptor (Frizzled paired with Ror instead of Lrp5), and this Ror receptor complex phosphorylates Disheveled in a way that allows it to interact with Rho GTPases.

C. Wnt/PCP signaling through cytoskeleton control can direct cells to divide in the different plane ( forming upper and lower tissue compartments) and to move within that different plane.

D. the Wnt/calcium pathway leads to the release of calcium stored within cells, and this released calcium acts as an important secondary messenger to activates a phospholipase (PLC) whose enzyme activities release a compound that in turn releases calcium ions from the cytosol.

Which of the following is incorrect?
TLS Online TPP Program

#Question id: 4656

#Unit 11. Evolution and Behavior

Logically, which of these should cast the most doubt on the relationships depicted by an evolutionary tree?
TLS Online TPP Program

#Question id: 7152

#Unit 5. Developmental Biology

The size of a cell is generally controlled by the amount of DNA in the nucleus: the more DNA, the larger the cell. What do experiments in which the amount of DNA is doubled (tetraploidy in salamanders) tell us about growth control?