NH4+ is toxic to plants, inhibit dinitrogenase and also interfere energy metabolism by dissociating ATP formation  from ETC  in both mitochondria and chloroplasts. What will plant cells do to avoid this problem?

a) Plant cells avoid ammonium toxicity by rapidly converting the ammonium generated from nitrate assimilation or photorespiration into nitrate

b) Plant cells avoid ammonium toxicity by rapidly converting the ammonium generated from nitrate assimilation or photorespiration into amino acids

c) The pathway for this conversion involves the sequential actions of glutamine synthetase (GS) and glutamate synthase (GOGAT)

d) The pathway for this conversion involves the sequential actions of Aspartate aminotransferase (Asp-AT) and Asparagine synthetase (AS)

Which of the above statements is incorrect?

TLS Online TPP Program

#Question id: 2173

#Unit 2. Cellular Organization

Which of the four classes of ATP-powered pumps share overall similarity: several subunits, the same general organization, and a similar function as H+ transporters?

TLS Online TPP Program

#Question id: 2174

#Unit 2. Cellular Organization

The major ATP-powered pump responsible for maintaining ion gradients across the plasma membrane of mammalian cells is:

TLS Online TPP Program

#Question id: 2175

#Unit 2. Cellular Organization

 ABC superfamily proteins are thought to act as ATP-dependent flippases in transporting:

TLS Online TPP Program

#Question id: 2176

#Unit 2. Cellular Organization

The many pumps present in the membrane have interconnected and important functions. Which of the following functions is NOT correct?

TLS Online TPP Program

#Question id: 2177

#Unit 2. Cellular Organization

 The resting membrane potential in animal cells depends largely on nongated _____ channels.

TLS Online TPP Program

#Question id: 2178

#Unit 2. Cellular Organization

The magnitude of the membrane electrical potential is calculated by: