TLS Online TPP Program

#Question id: 4599


Many crustaceans (for example, lobsters, shrimp, and crayfish) use their tails to swim, but crabs have reduced tails that curl under their shells and are not used in swimming. This is an example of ________.

#Unit 11. Evolution and Behavior
  1. convergent evolution

  2. a homologous structure

  3. natural selection

  4. a vestigial trait

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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

TLS Online TPP Program

#Question id: 27487

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is incorrect regarding the given figure

TLS Online TPP Program

#Question id: 27488

#Unit 1. Molecules and their Interaction Relevant to Biology

Cyclic monosaccharides or glycosides that are epimers, differing from each other in the configuration of C-1 if they are aldoses or in the configuration at C-2 if they are ketoses are known as