A chemiosmotic model  has been proposed  to explain Polar transport , following steps are involve in the transport of auxin polarly;

a) IAA enters the cell either passively in the undissociated form (IAAH) or by secondary active cotransport in the anionic form (IAA–)

b) The cell wall is maintained at an acidic pH by the activity of the plasma membrane H+- ATPase

c) In the cytosol, which has acidic pH, the IAAH form predominates

d) The anions exit the cell via auxin anion efflux carriers that are concentrated at the basal ends of each cell in the longitudinal pathway

Which of the following is the correct statements about the polarly transporting of auxin?

TLS Online TPP Program

#Question id: 19223

#Unit 12. Applied Biology

Based on the DNA sequence of a commonly used binary vector some example are

1. pBIN19

2. pCB301

3. pBR322

Which of the following above statements are correct?

TLS Online TPP Program

#Question id: 19216

#Unit 12. Applied Biology

Agrobacterium respond to which plant phenolic compounds which are excreted by susceptible wounded plants.

1. Toluene

2. Acetosyringone 

3. Hydroxyacetosyringon

Which of the option have incorrect statement?

TLS Online TPP Program

#Question id: 17085

#Unit 12. Applied Biology

Spontaneous cell fusion occurs at a very low rate. Enhanced fusion can be done by 

1. Sendai virus 

2. Polyethylene glycol

3. Ficol

4. Phenol red

Which of the above mentioned can be used for fusion experiments?

TLS Online TPP Program

#Question id: 17076

#Unit 12. Applied Biology

The various advantages of serum-free media could be

1. Improved reproducibility of results from different laboratories

2. Easier downstream processing of products from cultured cells

3. Biassays are free from interference due to serum proteins

4. They permit selective culture of diffrentiated cell types from the heterogeneous cultures

Which of the statements are true?

TLS Online TPP Program

#Question id: 16492

#Unit 12. Applied Biology

Upstream elements on the other hand regulates the activity of gene action are

A. Enhancer sequences

B. Silencer sequences

C. Termination sequences

D. Signal sequences

Mark the option with correct combination

TLS Online TPP Program

#Question id: 16487

#Unit 12. Applied Biology

Few limitations regarding organ culture 

It can be maintained only for a few months

Not suitable for biochemical and molecular analyses

For each study, fresh organ cultures have to be initiated

It denatures very easily

Which of the above statements are correct?