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TLS Online TPP Program

#Question id: 10132

Which of the following statements would be correct for photophosphorylation ?

#Unit 6. System Physiology – Plant
  1. Water is oxidized and protons are released in the lumen by PSII and reduces NADP+ to NADPH in the stroma both are spontaneous processes becoz their reduction potential is positive
  2. The sequential absorption of four photons (excitons) —known as S states, each absorption causing the loss of one electron from the Mn4Ca cluster, produces an oxidizing agent that can remove four electrons from two molecules of water, producing O2, the electrons lost from the Mn4Ca cluster pass one at a time to an oxidized Tyr residue in a PSII protein, then to P680+
  3. An alternative path of electron is cyclic electron transfer, in which elctron move from ferredoxin back to the cytochrome b6 f complex, the cyclic pathway produces more ATP and Water produces but less NADPH produces than the noncyclic
  4. Transfer of the two electrons to PQB reduces it to PQB 2–, and the reduced PQB 2– takes two protons from the stroma side of the medium, yielding a fully reduced plastohydroquinone (PQH2), the PQH2 then still remain bounded from the reaction center complex
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TLS Online TPP Program

#Question id: 10884

#Unit 10. Ecological Principles

Herbivore ingests plant material with 1000 k j energy form producer and 300 kJ loss as feces waste; additionally herbivore invests 300 k j energy in respiration. What is production efficiency of that herbivore?
TLS Online TPP Program

#Question id: 10886

#Unit 10. Ecological Principles

Much greater proportion of energy fixed by autotrophs is transferred to the herbivore level in the open ocean ecosystem than in a forest ecosystem because
TLS Online TPP Program

#Question id: 10887

#Unit 10. Ecological Principles

What is a linkage density of community A and B RESPECTIVELY?
TLS Online TPP Program

#Question id: 10889

#Unit 10. Ecological Principles

Which of the following ecosystem that is lower Productivity/Biomass ratios and energy transfer rates to higher trophic levels are slower 
TLS Online TPP Program

#Question id: 10891

#Unit 10. Ecological Principles

In a lake ecosystem with three trophic levels - Phytoplankton (P), Zooplankton (Z) and Carnivore (C) is control by bottom-up effects, which of the following observation is incorrect?
TLS Online TPP Program

#Question id: 10892

#Unit 10. Ecological Principles

Considering environment and ecosystem, identify the INCORRECT statement