TLS Online TPP Program

#Question id: 347


A beaker contains 100 milliliters (mL) of NaOH solution at pH = 13. A technician carefully pours into the beaker 10 mL of HCl at pH = 1. Which of the following statements correctly describes the result of this mixing?

#Unit 1. Molecules and their Interaction Relevant to Biology
  1. The concentration of Na+ ions will rise.

  2. The pH of the beaker's contents will increase.

  3. The pH of the beaker's contents will be neutral.

  4. The pH of the beaker's contents will decrease.

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TLS Online TPP Program

#Question id: 10131

#Unit 6. System Physiology – Plant

The detailed chemical mechanism of the oxidation of water to O2 is not yet well understood, but with structural information shows_one electron carrier, generally identified as Yz, functions between the oxygen-evolving complex and P680 to function in this region, Yz needs to have a very strong tendency to retain its electrons, this species has been identified as;

TLS Online TPP Program

#Question id: 10128

#Unit 6. System Physiology – Plant

PSII also involve in oxidation of water molecules, water is a very stable molecule that’s why  Oxidation of water to form molecular oxygen is very difficult, Many studies have provided a substantial amount of information about the process known;

which of the following are false ?

TLS Online TPP Program

#Question id: 9598

#Unit 6. System Physiology – Plant

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: 9597

#Unit 6. System Physiology – Plant

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

TLS Online TPP Program

#Question id: 9594

#Unit 6. System Physiology – Plant

The first reaction that converts electron energy into chemical energy—What will happened in  the primary photochemical event—

TLS Online TPP Program

#Question id: 9593

#Unit 6. System Physiology – Plant

The lower-energy orbital of the positively charged oxidized reaction centre chlorophyll has a vacancy and can accept an electron If the acceptor molecule donates its electron back to the reaction centre chlorophyll, What will happened?