TLS Online TPP Program

#Question id: 67


When a region of DNA must be repaired by removing and replacing some of the nucleotides, what ensures that the new nucleotides are in the correct sequence?

#Section C (Domain-Specific Knowledge)
  1. DNA cannot be repaired and this explains why mutations occur.

  2. The new nucleotides base pair accurately with those on the complementary strand.

  3. The repair enzyme recognizes the removed nucleotide and brings in an identical one to replace it.

  4. The three-dimensional structure determines the order of nucleotides.

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TLS Online TPP Program

#Question id: 27064

#Section C (Domain-Specific Knowledge)

These are three amino structure acid given below choose the correct option regarding the stereochemistry of these fig. 

TLS Online TPP Program

#Question id: 27065

#Section C (Domain-Specific Knowledge)

Determine R and S Configurations On A Fischer Projection given below 

TLS Online TPP Program

#Question id: 27066

#Section C (Domain-Specific Knowledge)

Determine R and S Configurations On A Fischer Projection given below 

TLS Online TPP Program

#Question id: 27067

#Section C (Domain-Specific Knowledge)

Choose the correct statement regarding the stereochemistry of amino acid
1. 16 amino acid except (Thr, Ile, Cys, Gly) L Fischer projection is equal to S and D is equal to R configuration 
2. Thr, Ile is special case because of two chiral center exist in L – Ile/Thr – 2S,3R and D-Ile/Thr–2R,3S configuration  
3. Cys exiest in L- Cys – R & D- Cys – S configuration 
4. Gly is optically inactive 

TLS Online TPP Program

#Question id: 27068

#Section C (Domain-Specific Knowledge)

Isoleucine and Threonine have two chiral carbons so exists in multiple RS configuration, choose the correct option regarding the given fig.
1. a is D-threonine is (2S, 3S) threonine
2. b is L-threonine is (2R,3S) threonine
3. a is L-threonine is (2S, 3R) threonine
4. b is D-threonine is (2R,3S) threonine

TLS Online TPP Program

#Question id: 27069

#Section C (Domain-Specific Knowledge)

Choose the correct option regarding the stereochemistry of given compound