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#Question id: 5833


In E. coli, the MutS, MutH, MutL, and MutU proteins are involved in which DNA repair mechanism?

#Unit 8. Inheritance Biology
  1. excision repair

  2. postreplication repair

  3. SOS response

  4. mismatch repair

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TLS Online TPP Program

#Question id: 880

#Unit 1. Molecules and their Interaction Relevant to Biology

The classic work of Christian Anfinsen in the 1950s on the enzyme ribonuclease revealed the relation between the amino acid sequence of a protein and its conformation. Ribonuclease is a single polypeptide chain consisting of 124 amino acid residues cross-linked by four disulfide bonds. Anfinsen’s plan was to destroy the three-dimensional structure of the enzyme and to then determine what conditions were required to restore the structure.

The critical observation of Anfinsen that the denatured ribonuclease, freed of urea and b -mercaptoethanol by dialysis;

I. The sulfhydryl groups of the denatured enzyme became reduced by air, and the enzyme spontaneously refolded into a catalytically active form.

II. These experiments showed that the information needed to specify the catalytically active structure of ribonuclease is contained in its amino acid sequence.

III. The 105 wrong pairings have been picturesquely termed “scrambled” ribonuclease.

IV. He found that scrambled ribonuclease spontaneously converted into fully active, native ribonuclease when trace amounts of b -mercaptoethanol were added to an aqueous solution of the protein.

Choose incorrect options;

TLS Online TPP Program

#Question id: 12790

#Unit 10. Ecological Principles

Which of the following are responsible for the conversion of most organic material into CO  , which can be utilized2 in primary production?

TLS Online TPP Program

#Question id: 10157

#Unit 6. System Physiology – Plant

In Glycolate pathway, Glycine exits the peroxisomes and enters the mitochondria where a multienzyme complex catalyzes the conversion of two molecules of glycine and one molecule of NAD+ into one molecule each of serine, NADH, NH4 +, and CO2; the enzyme complex used in this reaction is

TLS Online TPP Program

#Question id: 10529

#Unit 6. System Physiology – Plant

Insects produces an elicitors molecules that is caeliferins at the wound site in Arabidopsis plant, which induces

TLS Online TPP Program

#Question id: 24043

#General Aptitude

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