TLS Online TPP Program

#Question id: 200


When NAD+ is reduced, the UV absorbance at 340 nm

#Unit 1. Molecules and their Interaction Relevant to Biology
  1. decreases.

  2. increases.

  3. stays the same.

  4. decreases, then increases.

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TLS Online TPP Program

#Question id: 29439

#Unit 6. System Physiology – Plant

Nitrogenase, a complex metal containing enzyme is involved in conversion of N2 to NH3•
a. Nitrogenase is composed of two component proteins
b. Nitrogenase is a complex consisting of the MoFe protein (dinitrogenase or component I) a heterotetramer
c. Nitrogenase is a complex consisting of the MoFe protein (dinitrogenase or component I) a heterotetramer
d. Fe protein (dinitrogenase reductase or component II) a heterodimer

Which of the combination of above statement about Nitrogenase is INCORRECT

TLS Online TPP Program

#Question id: 29440

#Unit 6. System Physiology – Plant

Nitrogenase is a complex consisting of the 
(a) MoFe protein (dinitrogenase or component I) a heterotetramer
(b) the Fe protein (dinitrogenase reductase or component II) a heterotetramer
(c) MoFe protein (dinitrogenase or component I) a homodimer.
(d) the Fe protein (dinitrogenase reductase or component II) a homodimer

Which of the following is correct 

TLS Online TPP Program

#Question id: 29441

#Unit 6. System Physiology – Plant

Nitrogenase is a complex consisting of the MoFe protein Fe protein,
Here few of the statement are given regarding Fe protein is given 
(a) contains 2 identical subunits (dimer) – nif H
(b) Each subunit has MW of 30 ~ 72 kD.
(c) Each subunit contains an Fe-S cluster (4Fe and 4S2-).
(d) Each subunit has 2 Mo-Fe-S clusters

Which of the following is true regarding Fe protein

TLS Online TPP Program

#Question id: 29442

#Unit 6. System Physiology – Plant

Some of the following statement are given regarding MoFe protein
(a) 2 pairs of identical subunits (tetramer, nif D & nif K)
(b) A total of MW 180 ~ 235kD
(c) Each subunit has 2 Mo-Fe-S clusters.
(d) MoFe proteins are insensitive to O2

Which of the following is incorrect

TLS Online TPP Program

#Question id: 29443

#Unit 6. System Physiology – Plant

The nitrogenase enzyme complex has the characteristics listed below
(a) Fe protein is connected to ferredoxin
(b) Fe protein is involved in ATP Hydrolysis 
(c) MoFe protein is involved in the oxidation of N2 to NH3 
(d) MoFe protein is involved in the reduction of N2 to NH3

Which of the following is true

TLS Online TPP Program

#Question id: 29444

#Unit 6. System Physiology – Plant

Flavonoids, the prominent inducers of rhizobial nod gene expression, here  Flavonoid inducers Category along with their name and activity is mentioned

Match them correctly