Which of the following elements of matter would best convey that there is life on Earth?

  • A
    Oxygen
  • B
    Hydrogen
  • C
    Carbon
  • D
    Iron

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Which of the following statements is correct?

The pentose sugar in $DNA$ and $RNA$ has a ......... structure.

Aldopentoses named as ribose and $2-$deoxyribose are found in nucleic acids. What is their relative configuration?

The number of chiral carbons in $\beta-D-(+)$-glucose is

Glycosidic linkage is actually an

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