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TLS Online TPP Program

#Question id: 9270

In the lowest excited state, the excited chlorophyll has four alternative pathways for disposing of its available energy which of the statement of alternative pathway would be INCORRECT?

#Unit 6. System Physiology – Plant
  1. Excited chlorophyll can re-emit a photon and thereby return to its ground state—a process known as fluorescence, When it does so, the wavelength of fluorescence is slightly longer than the wavelength of absorption
  2. The excited chlorophyll can return to its ground state by directly converting its excitation energy into heat, with the emission of a photon
  3. Chlorophyll may participate in energy transfer, during which an excited chlorophyll transfers its energy to another molecule
  4. The photochemistry, in which the energy of the excited state causes chemical reactions to occur, the photochemical reactions of photosynthesis are among the fastest known chemical reactions
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TLS Online TPP Program

#Question id: 14968

#Unit 2. Cellular Organization

What compound provide much of the wall's antigenic specificity and thus make it possible to identify gram-positive bacteria by certain laboratory tests
TLS Online TPP Program

#Question id: 14969

#Unit 2. Cellular Organization

 A new drug is developed that targets and binds to the lipid A portion of LPS from Gram negative bacterial cells. This drug shows a high degree of activity and binding in a test tube setting against purified lipid A. Based on this information,
TLS Online TPP Program

#Question id: 14970

#Unit 2. Cellular Organization

A research lab is trying to produce new antibiotics. They come up with drugs that detach the hydrophilic heads from the phospholipids in plasma membranes. This drug
TLS Online TPP Program

#Question id: 14971

#Unit 2. Cellular Organization

Bacillus and Clostridium are medically relevant groups of bacteria that characteristically stain 
TLS Online TPP Program

#Question id: 14972

#Unit 2. Cellular Organization

Although O side chains are readily recognized by host antibodies, gram negative bacteria may thwart host defenses by 
TLS Online TPP Program

#Question id: 14976

#Unit 2. Cellular Organization

Plasmids are not required for host growth and reproduction, although they may carry genes that give their bacterial host a selective advantage. Plasmid genes can render  bacteria 
1. Drug-resistant 
2. Give new metabolic abilities 
3. Make them pathogenic

Which among the following combinations is correct?