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TLS Online TPP Program

#Question id: 2616

Normally expression is always consider with the, transcription most of the regulation applied over transcriptional initiation in prokaryotes, why

#Unit 2. Cellular Organization

  1. Because transcription initiation is the most energetically efficient step to regulate

  2. Regulation at this first step is easier to do well.

  3. There is only a single copy of each gene (in a haploid genome), and so typically only a single promoter on a single DNA molecule must be regulated to control expression of a given gene.

  4. A, B & C

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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,?
TLS Online TPP Program

#Question id: 14952

#Unit 6. System Physiology – Plant

Some are thin areas where the primary wall is not covered by a secondary wall and are populated with plasmodesmata known as
TLS Online TPP Program

#Question id: 14953

#Unit 6. System Physiology – Plant

Which of the following is a wound-inducible glucan composed primarily of β(1,3)-linkages?
TLS Online TPP Program

#Question id: 14954

#Unit 6. System Physiology – Plant

Which of the following cell wall polysaccharides are also known as matrix polysaccharides?
TLS Online TPP Program

#Question id: 14955

#Unit 6. System Physiology – Plant

Given some plant chemical composition, which one of these are soluble in water?
TLS Online TPP Program

#Question id: 14956

#Unit 6. System Physiology – Plant

Where is the catalytic domain of cellulose synthase located?