TLS Online TPP Program

#Question id: 640


The data in the table above were collected for an enzyme-catalyzed reaction. The Km for this enzyme is approximately

#Unit 1. Molecules and their Interaction Relevant to Biology
  1. 0.8 X 10^-5 mM

  2. 2 X 10^-5 mM      

  3. 8 X 10^-5 mM

  4. 140 micromol.min-1

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TLS Online TPP Program

#Question id: 10189

#Unit 1. Molecules and their Interaction Relevant to Biology

A very common isotope substitution is when hydrogen is replaced by deuterium. This is known as a deuterium effect and is expressed by the ratio kH/kD (as explained above). Normal KIEs for the deuterium effect

TLS Online TPP Program

#Question id: 10190

#Unit 1. Molecules and their Interaction Relevant to Biology

Arrange the protium, deuterium and tritium water in increasing order of molarity. Suppose density 1g/ml.

TLS Online TPP Program

#Question id: 10191

#Unit 1. Molecules and their Interaction Relevant to Biology

Statements are given as
A. Primary kinetic isotope effects are rate changes due to isotopic substitution at a site of bond breaking in the rate determining step of a reaction.
B. Solvent shows primary kinetic isotope effect
C. Secondary kinetic isotope effects are rate changes due to isotopic substitutions at a site other than the bond breaking site in the rate determining step of the reaction.
D. Solvent shows primary kinetic isotope effect and secondary kinetic effect as well
Which of the following is correct combination of statements

TLS Online TPP Program

#Question id: 10192

#Unit 6. System Physiology – Plant

Solar-tracking leaves present a nearly vertical position at sunrise, and during the night the leaves take a horizontal position, the sensing of light in solar-tracking leaves occurs in specialized regions of the leaf or stem, it can response for,

TLS Online TPP Program

#Question id: 10193

#Unit 6. System Physiology – Plant

Leaf orientation is controlled by a specialized organ that contains motor cells that change their osmotic potential and generate mechanical forces that determine laminar orientation, that specialized organ is known as

TLS Online TPP Program

#Question id: 10194

#Unit 6. System Physiology – Plant

Some plant species are not able to acclimate when transferred from a sunny to a shady environment, or vice versa, lack of acclimation indicates that these plants are specialized for either a sunny or a shady environment. When plants adapted to deep-shade conditions are transferred into full sunlight may leaves experiences;