TLS Online TPP Program

#Question id: 12786


How are matter and energy used in ecosystems?

#Unit 10. Ecological Principles
  1. Matter is cycled through ecosystems; energy is not. 
  2. Energy is cycled through ecosystems; matter is not.
  3. Energy can be converted into matter; matter cannot be converted into energy.
  4. Matter can be converted into energy; energy cannot be converted into matter.
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TLS Online TPP Program

#Question id: 21141

#Unit 12. Applied Biology

A vector contains the nitR gene under the control of the nitA promoter in a separate operon, the expression of vector is used, upon the addition of the inducer. The inducer–NitR protein complex activates the transcription of both the target gene(s) and nitR and increased level of NitR results in a very high level of production of the target protein(s). Which type of inducer using by nitR?

TLS Online TPP Program

#Question id: 15609

#Unit 12. Applied Biology

Most bacteria, some protozoans  and even archaea use poly-β-hydroxybutyrate, a polymerized form of β-PHB, as 

TLS Online TPP Program

#Question id: 5670

#Unit 5. Developmental Biology

Embryonic stem cells can be induced in the laboratory to differentiate into muscle, nerve, pancreatic, and other specialized cell types. It has recently become possible to trigger the dedifferentiation of somatic cells back into pluripotent cells (so-called induced pluripotent stem cells or iPS cells) by artificially enhancing the production of a relatively small number of key transcriptional factors known to be required for maintenance of pluripotency. Examples of such transcription factors are OCT4 and NANOG. The production of OCT4 and NANOG (and other key regulatory proteins) is stimulated by a transcription factor known as FOXP1, a member of the Forkhead family of DNA-binding proteins. There are two isoforms of FOXP1.

Which of the following statement regarding to FOXP1 is incorrect?

TLS Online TPP Program

#Question id: 4965

#Unit 11. Evolution and Behavior

What is thought to be the correct sequence of these events, from earliest to most recent, in the evolution of life on Earth?

1.  origin of mitochondria

2.  origin of multicellular eukaryotes

3.  origin of chloroplasts

4.  origin of cyanobacteria

5.  origin of fungal-plant symbioses

TLS Online TPP Program

#Question id: 1405

#Unit 4. Cell Communication and Cell Signaling

A gain-of-function mutation in which of the following would have the same effect as a gain-of-function mutation in Ras?