TLS Online TPP Program

#Question id: 14900


polymer-trapping model explains symplastic loading in plants, This model states that the sucrose diffussion takes place through cell to cell via plasmodesmata; which of the following prediction about the diffusion mechanism is INCORRECT?    

#Unit 6. System Physiology – Plant
  1. Sucrose, synthesized in the mesophyll, diffuses from the bundle sheath cells into the intermediary cells through the abundant plasmodesmata
  2. In the intermediary cells, raffinose is synthesized from sucrose and galactinol, Because of its smaller size, raffinose is able to diffuse back into the mesophyll
  3. Plasmodesmata between the intermediary cells and sieve elements must be wider and allow passage of raffinose and stachyose
  4. Raffinose is able to diffuse into the sieve elements. As a result, the concentration of transport sugar rises in the intermediary cells and the sieve elements.
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TLS Online TPP Program

#Question id: 2325

#Unit 2. Cellular Organization

Which of the following is found in BOTH prokaryotic and eukaryotic cells?

TLS Online TPP Program

#Question id: 11833

#Unit 6. System Physiology – Plant

Analysis of mRNA from tomato fruits from wild-type and transgenic tomato plants genetically engineered to lack ethylene has revealed that gene expression during ripening is regulated by at least two independent pathways;

I) Ethylene-dependent pathway

II) Ethylene-independent pathway

Some given genes involved in these two pathways,

a) ACC oxidase

b) respiratory metabolism

c) ACC synthase

d) chlorophyllase

e) lycopene and aroma biosynthesis

Which of the following is the correct combination from the given pathways and its included genes?

TLS Online TPP Program

#Question id: 5153

#General Aptitude

How many of the following numbers are divisible by 132 ?

264,396,462,792,968,2178,5184,6336

TLS Online TPP Program

#Question id: 2236

#Unit 2. Cellular Organization

The partition coefficient K, the equilibrium constant for partitioning between oil and water, for butyric acid is about 10–2, and for 1,4-butanediol it is about 10–4.  You add liposomes containing only water to a solution with an initial concentration of 1 mM butyric acid and 100 mM 1,4-butanediol outside the liposomes.  What is the relative rate of diffusion of the two substances into the liposome interior?

TLS Online TPP Program

#Question id: 31261

#Unit 4. Cell Communication and Cell Signaling

Most tumors induce the formation of new blood vessels that invade the tumor and nourish it, a process called as: