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TLS Online TPP Program

#Question id: 10151

Light regulates the stability of the ternary complex through the ferredoxin–thioredoxin system Regulation of chloroplast phosphoribulokinase and glyceraldehyde-3-phosphate dehydrogenase. Chloroplasts contain two isoforms of glyceraldehyde3-phosphate dehydrogenases, named A4 and A2B2. Which of the following statement about isoform of glyceraldehyde3-phosphate dehydrogenases is False?

#Unit 6. System Physiology – Plant
  1. The A4 isoform is a catalytically active tetramer
  2. The A and B polypeptides of the A2B2 isoform are similar except that a C-terminal extension of the subunit B holds two cysteines able to form a disulfide bridge
  3. The A2B2 glyceraldehyde-3-phosphate dehydrogenase can form the A8B8 oligomer can form in the light
  4. “dark conditions” the interaction of oxidized phosphoribulokinase with the A4-glyceraldehyde3-phosphate dehydrogenase and oxidized CP12 stabilizes the complex 
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TLS Online TPP Program

#Question id: 24209

#Unit 1. Molecules and their Interaction Relevant to Biology

Two enzyme having same reaction mechanism using same cofactor such as PDC and KDC
TLS Online TPP Program

#Question id: 24210

#Unit 1. Molecules and their Interaction Relevant to Biology

The human genome encodes four different hexokinases (I to IV), all of which catalyze the same reaction. If Two or more enzymes that catalyze the same reaction but are encoded by different genes are called to be
TLS Online TPP Program

#Question id: 24211

#Unit 1. Molecules and their Interaction Relevant to Biology

Plot of hexokinase IV (Glucokinase) is different While Hexokinases I, II, and III have similar kinetic properties. So, in given graph which of the following represents hexokinase IV and Hexokinases I, II, and III
a. i is representing Hexokinases IV
b. ii is representing Hexokinases I, II, and III
c. i is representing Hexokinases I, II, and III
d. ii is representing Hexokinases IV
Choose the correct option
TLS Online TPP Program

#Question id: 24212

#Unit 1. Molecules and their Interaction Relevant to Biology

Choose the correct statement
a. Hexokinases IV remains sequesters in the nucleus in case of high F-6-P and high ATP
b. Hexokinases IV remains sequesters in the cytoplasm in case of high F-6-P and high ATP
c. Hexokinase requires Mg+2 for its activity, because the true substrate of the enzyme is not ATP4- but the MgATP2- complex.
d. Hexokinase requires Mg+2 for its activity, because the true substrate of the enzyme is MgATP4- but not the MgATP2- complex.
TLS Online TPP Program

#Question id: 24213

#Unit 1. Molecules and their Interaction Relevant to Biology

Choose the incorrect statement
TLS Online TPP Program

#Question id: 24214

#Unit 1. Molecules and their Interaction Relevant to Biology

Which molecule coordinately activate glycolysis and at the same time inhibit gluconeogenesis