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TLS Online TPP Program

#Question id: 8774

A large proportion of archaeans are extremophiles, so called because they inhabit extreme environments with high acidity, salinity, and/or temperature. Such environments are thought to have been much more common on primitive Earth. Thus, modern extremophiles survive only in places that their ancestors became adapted to long ago. Which of the following is, consequently, a valid statement about modern extremophiles, assuming that their habitats have remained relatively unchanged?

#Unit 9. Diversity of Life Forms
  1. Among themselves, they should share relatively few ancestral traits, especially those that enabled ancestral forms to adapt to extreme conditions.
  2. On a phylogenetic tree whose branch lengths are proportional to the amount of genetic change, the branches of the extremophiles should be shorter than the non-extremophilic archaeans.
  3. They should contain genes that originated in eukaryotes that are the hosts for numerous species of bacteria.
  4. They should currently be undergoing a high level of horizontal gene transfer with nonextremophilic archaeans
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TLS Online TPP Program

#Question id: 28076

#Unit 6. System Physiology – Plant

Choose the correct statement regarding Water splitting 
(a) Water splitting is oxidation reaction takes place in lumen
(b) Water splitting takes place at - reduction potential
(c) Water splitting takes place at + reduction potential
(d) NADPH+ formation is reduction reaction takes place in stroma
TLS Online TPP Program

#Question id: 28077

#Unit 6. System Physiology – Plant

The catalytic site for water oxidation in lumen is a
TLS Online TPP Program

#Question id: 28078

#Unit 6. System Physiology – Plant

Chlorophyll functions on the phenomenon of absorption of light and shows excitation of electron
(a) Chlorophyll absorbs blue or red light 
(b) blue light absorption resulting in a higher excited state 
(c) red light absorption resulting in a higher excited state 
(d) From IInd exited state returning ground state heat will be observed from blue and fluorescence from red light
Which of the following is incorrect
TLS Online TPP Program

#Question id: 28079

#Unit 6. System Physiology – Plant

In molecules, two types of excited states can exist singlet and triplet  
(a) The singlet state is relatively long‐lived than triplet and have parallel spin
(b) The singlet state is relatively short‐lived than triplet and have antiparallel spin
(c) The triplet state is relatively long‐lived than singlet and have two parallel spin
(d) The triplet state is relatively long‐lived than singlet and have two anti-parallel spin
Which of the following is correct 
TLS Online TPP Program

#Question id: 28080

#Unit 6. System Physiology – Plant

Excitation of chlorophyll RC has various ways to dissipate energy, which of the following is not a way to dissipate energy 
a. Heat
b. Fluorescence
b. energy transfer
d. Photochemistry via charge separation

Which of the following is correct 
TLS Online TPP Program

#Question id: 28081

#Unit 6. System Physiology – Plant

In the phenomenon of transfer of electron in photosystem have various time order

(a) Splitting of H2O – 1ms

(b) Transfer of electron from Mn – Z – in Microseconds 

(c) Transfer of electron from Z – P680 – in Nanosecond 

(d) 1st photochemistry - picoseconds

Which of the following is correct