The mechanisms that regulate the loading of sucrose from the apoplast to the sieve elements by the sucrose–H+ symporter await characterization. Possible regulatory factors include the following:

a) The solute potential or, more likely, the turgor pressure of the sieve elements

b) Sucrose concentration in the apoplast

c) The available number of symporter protein molecules

Which one of the mechanism that involve to regulate the loading of sucrose?

TLS Online TPP Program

#Question id: 1574

#Unit 4. Cell Communication and Cell Signaling

A bacterium entering the body through a small cut in the skin will do which of the following?

TLS Online TPP Program

#Question id: 12694

#Unit 8. Inheritance Biology

A panel of cell lines was created by human—mouse somatic-cell hybridization. Each line was examined for the presence of human chromosomes and for the production of an enzyme. The following results were obtained: 

On the basis of these results, which chromosome has the gene that encodes the enzyme? 

TLS Online TPP Program

#Question id: 10578

#Unit 10. Ecological Principles

The population of annual breeder growing at a rate of 10% per year. Initial population size is 1200. After 3 years population size would be

TLS Online TPP Program

#Question id: 3884

#Unit 3. Fundamental Processes

Compared with DNA polymerase, reverse transcriptase: 

TLS Online TPP Program

#Question id: 11116

#Unit 7. System Physiology – Animal

Which one of the following structures is NOT part of the respiratory zone: