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TLS Online TPP Program

#Question id: 554

The Lineweaver-Burk plot is used to:

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. determine the equilibrium constant for an enzymatic reaction.

  2. extrapolate for the value of reaction rate at infinite enzyme concentration.

  3. illustrate the effect of temperature on an enzymatic reaction.

  4. solve, graphically, for the rate of an enzymatic reaction at infinite substrate concentration.

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TLS Online TPP Program

#Question id: 13190

#Unit 10. Ecological Principles

During the evolution of life on Earth, the photosynthetic organisms initially responsible for raising atmospheric oxygen concentrations from less than 1 percent to about 20 percent were
TLS Online TPP Program

#Question id: 23316

#Unit 1. Molecules and their Interaction Relevant to Biology

If a student becomes unconscious during the period, what will you like to do?
TLS Online TPP Program

#Question id: 12951

#Unit 7. System Physiology – Animal

If the cortical collecting tubule tubular fluid inulin concentration is 40 mg/100 ml and plasma concentration of inulin is 2.0 mg/100 ml, what is the approximate percentage of the filtered water that remains in the tubule at that point?
TLS Online TPP Program

#Question id: 10384

#Unit 6. System Physiology – Plant

Nitrogenase enzyme complex catalyzes the molecular nitrogen fixation, this enzyme not only fixes nitrogen but also perform other reactions given below. Which one is not performed by nitrogenase?
TLS Online TPP Program

#Question id: 10134

#Unit 6. System Physiology – Plant

Some herbicides such as dichlorophenyldimethylurea (DCMU, also known as diuron) and paraquat, block photosynthetic electron flow from where ?

a.) DCMU blocks electron flow at the quinone acceptors of PSII, by competing for the binding site of plastoquinone that is normally occupied by PQB

b.) Paraquat accepts electrons from the early acceptors of PSI and then reacts with oxygen to form superoxide, O2 – , a species that is very damaging to chloroplast components

c.) DCMU blocks electron flow at the pheophytin acceptors of PSII, by competing for the binding site of pheophytin

d.) Paraquat accepts electrons from the Iron-sulfur system of PSI and then reacts with oxygen to form superoxide, O2 – , a species that is very damaging to chloroplast components

Which of the following combination is true?