TLS Online TPP Program

#Question id: 4489


HSP70 gene from Drosophila. This gene, activated by heat shock, is controlled by two activators GAGA binding factor and HSF,In response to heat shock, HSF binds to specific sites at the promoter and recruits a kinase, P-TEFb (positive transcription elongation factor). What is the proper mechanism of pausing and release of Pol II ?

#Unit 3. Fundamental Processes
  1. Second phosphorylation on Serine5 is achieved through recruitment of the kinase P-TEFb

  2. P-TEFb is part of a super elongation complex, which releases paused Pol II from the proximal promoter.

  3. A strong acidic activator like Gal4 is able to recruit PTEFb/SEC along with the rest of the machinery

  4. B and C Only

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TLS Online TPP Program

#Question id: 10564

#Unit 6. System Physiology – Plant

The term Ys , called the solute potential or the osmotic potential, represents the effect of dissolved solutes on water potential,

a) The mixing of solutes and water reduces the disorder of the system and thereby lowers free energy

b) Solutes reduce the free energy of water by diluting the water

c) The mixing of solutes and water increases the disorder of the system and thereby lowers free energy

d) Solutes increases the free energy of water by diluting the water

 Which one of the following statements are INCORRECT?

TLS Online TPP Program

#Question id: 10565

#Unit 6. System Physiology – Plant

The term Yp is the hydrostatic pressure of the solution

TLS Online TPP Program

#Question id: 10566

#Unit 6. System Physiology – Plant

What happens if this cell is placed in the beaker containing 0.1 M sucrose, Because the water potential of the sucrose solution (Yw = –0.244) is greater than the water potential of the cell (Yw = –0.732 MPa)

a) Water will move from the cell to the sucrose solution

b) From high to low water potential

c) From low to high water potential

d) Water will move from the sucrose solution to the cell

Which of the following statement is CORRECT?

TLS Online TPP Program

#Question id: 10567

#Unit 6. System Physiology – Plant

Cell A is having solute potential of -14 and Pressure potential of 3. Cell B is having Solute potential of -16 and Pressure potential of 4. The water will travel from

TLS Online TPP Program

#Question id: 10568

#Unit 6. System Physiology – Plant

Turgid cell dropped into sucrose solution , the cell has Yp = 0.488 MPa Ys = –0.732 MPa Yw = –0.244 Mpa , 0.3 M Sucrose solution contain Yp = 0 MPa Ys = –0.732 MPa Yw = –0.732 Mpa , Choose the correct option

TLS Online TPP Program

#Question id: 10569

#Unit 6. System Physiology – Plant

Plants that grow in saline environments, called