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TLS Online TPP Program

#Question id: 9214

Researchers have been studying a rare population of 87 voles in an isolated area. Ten voles from a larger population were added to this isolated population. Besides having ten additional animals, what benefits are there to importing individuals?

#Unit 9. Diversity of Life Forms
  1. There is no benefit other than increasing the overall population size.
  2. Additional voles will strengthen competition and increase the survival of the fittest.
  3. Additional animals would increase beneficial genetic drift.

  4. Additional voles from a distant population will likely increase genetic diversity and reduce inbreeding.

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TLS Online TPP Program

#Question id: 6978

#Unit 5. Developmental Biology

Removal of the apical ridge leads to
TLS Online TPP Program

#Question id: 13122

#Unit 2. Cellular Organization

Choose the incorrect?
1- COPI vesicles transport proteins from the rough ER to the cis -Golgi; COPII vesicles transport proteins in the reverse s Direction.
2- The KDEL receptor binds more tightly to its ligand ar low pH, and it is thought that the receptor is able to bind KDEL peptides in the cis-Golgi but to release these peptides in the ER because the pH of the Golgi is slightly lower than that of the ER.
3- The KDEL sorting signal is recognized and bound by the KDEL receptor, a transmembrane protein found primarily on small transport vesicles shuttling between the ER and the cis -Golgi and on the cis-Golgi reticulum.
TLS Online TPP Program

#Question id: 7309

#Unit 5. Developmental Biology

Following statements are regarding to the molecular basis of the coincidence model in Arabidopsis.

A. In Arabidopsis under short days, there is little overlap between CO mRNA expression and daylight.

B. CO protein does not accumulate to sufficient levels in the phloem to promote the expression of the transmissible floral stimulus and the plant remains vegetative.

C. Under long days, the peak of CO mRNA abundance (at hours 12 through 16) overlaps with daylight (sensed by phyA and cryptochrome [cry]), allowing CO protein to accumulate.

D. CO activates FLC mRNA expression in the phloem, which causes flowering when the FT protein is translocated to the apical meristem.

Which of the following is incorrect?
TLS Online TPP Program

#Question id: 5833

#Unit 8. Inheritance Biology

In E. coli, the MutS, MutH, MutL, and MutU proteins are involved in which DNA repair mechanism?
TLS Online TPP Program

#Question id: 5957

#General Aptitude

June 12, 1980, was a Thursday. Then may 12 of the same year was a