SELECT * FROM question_mgmt as q WHERE id=1660 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=3 AND subId=9 AND chapterId=69 and ex_no='2' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 12th chemistry Biomolecules write the important structural and functional diff

Question:

Write the important structural and functional differences between DNA and RNA.

Answer:

The structural differences between DNA and RNA are as follows:

DNA

RNA

1.

The sugar moiety in DNA molecules is β-D-2 deoxyribose.

1.

The sugar moiety in RNA molecules is β-D-ribose.

2.

DNA contains thymine (T). It does not contain uracil (U).

2.

RNA contains uracil (U). It does not contain thymine (T).

3.

The helical structure of DNA is double-stranded.

3.

The helical structure of RNA is single-stranded.

The functional differences between DNA and RNA are as follows:

DNA

RNA

1

DNA is the chemical basis of heredity.

1

RNA is not responsible for heredity.

2

DNA molecules do not synthesise proteins, but transfer coded message for the synthesis of proteins in the cells.

2

Proteins are synthesised by RNA molecules in the cells.


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