TLS Online TPP Program

#Question id: 10207


In high light, violaxanthin is converted into zeaxanthin, via the intermediate antheraxanthin by the enzyme known as

#Unit 6. System Physiology – Plant
  1. 9-cis-Epoxycarotenoid dioxygenase   
  2. zeaxanthin epoxide(ZEP)
  3. Ascorbate peroxidase        
  4. violaxanthin de-epoxidase    
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TLS Online TPP Program

#Question id: 27481

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is the examples of Epimers?

TLS Online TPP Program

#Question id: 27482

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is holds true for the D-Ribose (Rib), D-Arabinose (Ara), D-Xylose (Xyl), D-Lyxose (Lyx)

TLS Online TPP Program

#Question id: 27483

#Unit 1. Molecules and their Interaction Relevant to Biology

Compounds which have the same molecular formula and sequence of bonded elements, but which are nonsuperimposable, non-mirror images

TLS Online TPP Program

#Question id: 27484

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is truly stating about the stereochemistry of D-Erythrose, L-Erythrose  and D-Threose and L-Threose

1. D-Erythrose, L-Erythrose are enantiomers to each other

2. D-Erythrose, L-Erythrose are diastereomers to each other

3. D-Erythrose and D-Threose are diastereomers to each other 

4. D-Erythrose, L-Erythrose are enantiomers to each other 

TLS Online TPP Program

#Question id: 27485

#Unit 1. Molecules and their Interaction Relevant to Biology

Two sugars that differ in configuration at only one chiral center are described as

TLS Online TPP Program

#Question id: 27486

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the is true regarding D-Mannose,  D-Glucose, and D-Galactose
1. D-Mannose are epimer with D-Glucose, at C2
2. D-Glucose, are epimer with D-Galactose at C4
3. D-Mannose are epimer with D-Galactose at C4
4. D-Galactose are epimer with D-Mannose at C2