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TLS Online TPP Program

#Question id: 66

Which of the following statements regarding isomerism is incorrect regarding biomolecules?

#Section C (Domain-Specific Knowledge)

  1. Stereoisomers that are mirror images of each other are called enantiomers.

  2. A carbon atom with four different substituents is said to be asymmetric, and asymmetric carbons are called chiral centers.

  3. Pairs of stereoisomers that are not mirror images of each other are called diastereomers.

  4. An equimolar solution of the two enantiomers (a racemic mixture) rotates the plane of plane-polarized light in a particular direction.

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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