Question

Like DNA, RNA contains four nitrogenous bases. Three of them are the same as those found in DNA. The one that is different is called ________
The five-carbon sugar in RNA is called ________

Answer 1

Answer:

• RNA has for nitrogenous bases out of which three are the same as DNA. The bases common to both DNA and RNA are Adenine (A), Guanine (G) and Cytosine (C). The one that is different is called Uracil (U).

• The five carbon sugar in RNA is called Ribose sugar.

Explanation:

DNA consist of four bases that are A,T,C and G. Similarly, RNA also consists of four bases that are A,U,C and G.

Thymine (T) is not present in RNA, instead of it, RNA has Uracil (U) which binds with Adenine (A) by two hydrogen bonds.

The five-carbon sugar that is present in RNA is ribose and that present in DNA is deoxy-ribose. Ribose and deoxy-ribose differ at second carbon. Ribose has an OH at second carbon while in deoxy-ribose, O is missing at second carbon and it has only H.

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