Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 7219
TLS Online TPP Program

#Question id: 10438

Which of the following are participate in the control of circadian clocks and flowering?

#Unit 6. System Physiology – Plant
  1. Cryptochromes (cry)
  2. ZTL family
  3. Phototropins (phots)
  4. phytochromes
More Questions
TLS Online TPP Program

#Question id: 1442

#Unit 4. Cell Communication and Cell Signaling

Transgenic mice that express an activated oncogene like rasD under the control of the TetOFF system are likely to undergo which of the following events when tetracycline is given?
TLS Online TPP Program

#Question id: 2373

#Unit 2. Cellular Organization

Plasmodesmata
TLS Online TPP Program

#Question id: 33441

#Unit 1. Molecules and their Interaction Relevant to Biology

Genetic defects in the biosynthesis of porphyrins can lead to the accumulation of pathway intermediates, causing a variety of human diseases known collectively as
TLS Online TPP Program

#Question id: 5685

#Unit 5. Developmental Biology

Human sperm are allowed to fertilize ova having non- functional ovastacin. The following possibilities may be of significance in the fusion of these gametes:

A.        The sperms will not fertilize ova.

B.        The sperms will bind and penetrate the zona pellucida but will not be able to fuse with ovum membrane.

C.        ZP2 will not be clipped by cortical granule protease.

D.        CD9 protein of egg membrane microvilli will not be able to interact sperm membrane proteins in the absence of ovastacin.

E.         Polyspermy may occur frequently.

Which combination of statements represent the outcome of the above event?
TLS Online TPP Program

#Question id: 16135

#Unit 13. Methods in Biology

You obtain 6 BACs (of known order, as shown below) and 7 STSs (of unknown order) that derive from a region of mouse chromosome 16 whose genomic sequence has not yet been finished.   
 
By PCR (using 20-bp primers at either end of each STS), you test each of the 6 BACs for the presence (+) or absence (-) of each of the 7 STSs. You obtain the following results:
 
Would you expect the DNA sequence of PCR product obtained at STS5 using mouse genomic DNA as template to more closely resemble that obtained using BAC B, BAC D, or BAC F? Briefly explain your answer.