Autogenic factors results from the community and its organism for example filling in the pond by the dead organism from the pond itself. It included several other factors except____

TLS Online TPP Program

#Question id: 14906

#Unit 6. System Physiology – Plant

The specific linkages between sugar rings, including the specific carbons that are linked together and the configuration of the linkage, are important for the properties of the polysaccharide;

           

          I) Amylose                          a) β(1,3)-linkages                               

        II) Cellulose                          b) β (1,4)-linkages

         III) Callose                                   c) α(1,4)-linked

                                                             d) α (1,3)-linkages

Which of the following linkage combinations is correct linkages of the polysaccharides?

TLS Online TPP Program

#Question id: 14947

#Unit 6. System Physiology – Plant

 Nonenzymatic proteins whose exact functions are uncertain. Such proteins may be localized in the walls of specific cell types or more widespread

cell wall protein                                                                   Tissue localization

      A) HRGP (hydroxyproline rich glycoprotein)              i) Xylem, fibers, cortex, root hairs

      B) AGP (arabinogalactan protein) ii) Primary xylem and phloem

     C) PRP (proline-rich protein)                                          iii) Cambium, vascular parenchyma

     D) GRP (glycine-rich protein)                                  iv) Varied cell-specific expression

Which of the following combinations of nonenzymatic protein with its correct location?

TLS Online TPP Program

#Question id: 14948

#Unit 6. System Physiology – Plant

Cellulose microfibrils have an ordered structure and are synthesized at the plasma membrane, given characteristics of microfibrils;

a) Each microfibril is composed of an estimated 18 parallel chains of (1,4)-linked β-D-glucose chains tightly bonded to each other to form a crystalline microfibril

b) Microfibrils have hydrophilic surfaces, populated by polar –OH groups extending from the plane of the sugar rings

c) Microfibrils have hydrophobic surfaces, populated by nonpolar C–H groups populating the sides of stacked glucose chains

 d) microfibril important for enzymatic attack by microbial cellulases, which dock onto the hydrophobic surface and remove one glucan chain at a time

Which of the following from given characteristics of microfibrils is incorrect?

TLS Online TPP Program

#Question id: 14949

#Unit 6. System Physiology – Plant

How the matrix polysaccharides differ from the cellulose?

TLS Online TPP Program

#Question id: 14950

#Unit 6. System Physiology – Plant

NMR studies of the pectin molecules not indicate that,

TLS Online TPP Program

#Question id: 14951

#Unit 6. System Physiology – Plant

Expansins belong to a large superfamily of proteins, divided into two major expansin families, α-expansins (EXPAs) and β-expansins (EXPBs), what is the function of these two?

a) EXPAs are more active on eudicot cell walls, whereas EXPBs are more active on grass cell walls

b) EXPAs are more active on grass cell walls, whereas EXPBs are more active on eudicot cell walls

c) EXPAs loosen cellulose–cellulose junctions containing xyloglucan, whereas EXPBs loosen wall complexes containing GAX

d) EXPAs loosen wall complexes containing GAX, whereas EXPBs loosen cellulose–cellulose junctions containing xyloglucan

Which combination is correct from some given above functions of expansins,?