TLS Online TPP Program

#Question id: 4358


Which of the following mechanisms is used to coordinate the expression of multiple, related genes in eukaryotic cells?

#Part-A Aptitude & General Biotechnology
  1. Environmental signals enter the cell and bind directly to promoters.

  2. A given gene may have multiple enhancers, but each enhancer is generally associated with only that gene and no other.

  3. The genes are organized into a large operon, allowing them to be coordinately controlled as a single unit.

  4. A single repressor is able to turn off several related genes.

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TLS Online TPP Program

#Question id: 9583

#Part-B Specialized Branches in Biotechnology

 A mechanism known as the Q cycle accounts for most of the observations in which structure and reactions of plastoquinone that operate in,

TLS Online TPP Program

#Question id: 9595

#Part-B Specialized Branches in Biotechnology

The process is that the absorbed photon causes an electron rearrangement in the reaction centre chlorophyll, followed by an electron transfer process in which part of the energy in the photon is captured in the form of

TLS Online TPP Program

#Question id: 9596

#Part-B Specialized Branches in Biotechnology

The reaction centre chlorophyll is transiently in an oxidized state after losing an electron and before being re-reduced by its electron donor, what characteristics has been shown by chlorophylls in an oxidized state?

TLS Online TPP Program

#Question id: 9597

#Part-B Specialized Branches in Biotechnology

The reaction centre bacteriochlorophyll from purple photosynthetic bacteria was similarly identified as-

TLS Online TPP Program

#Question id: 9598

#Part-B Specialized Branches in Biotechnology

In the oxidized state, reaction centre chlorophylls contain an unpaired electron, Molecules with unpaired electrons can often be detected by a magnetic-resonance technique known as

TLS Online TPP Program

#Question id: 9599

#Part-B Specialized Branches in Biotechnology

The primary donor of PSI, P700, is a dimer of chlorophyll a molecules, in primary donor chlorophyll, additional chlorophylls molecules such as