Question

For the following structural characteristic, decide if it is a characteristic of DNA, a characteristic of RNA, a characteristic of both DNA and RNA, or a characteristic of neither DNA nor RNA.

It is usually a single string of nucleotides.


neither DNA nor RNA


DNA


both DNA and RNA


RNA

Answer 1

Answer:

DNA (Deoxy Ribo Nucleic Acid)

• Thymine is present in it.
• Double stranded structure.

RNA (Ribo Nucleic Acid)

• Thymine is replaced by Uracil in it.
• Single-stranded structure.

So, correct answer is RNA as it contains only single string of nucleotide.

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Explanation:

Nucleotide are the monomers whose repetition makes polynucleotides or nucleic acid like DNA and RNA.

Nucleotide consists of three components:

1) Nitrogenous base

which is further consists of Purine and Pyrimidine

→ Purine = Adenine, Guanine

→ Pyrimidine = Cytosine, Thymine

2) Pentose sugar

3) Phospheric acid

(All three components together make nucleotide.)

• In structure of DNA, Purine always make H-bond (hydrogen bond) with Pyrimidine. Always Adenine make double bond double bond with Thymine and Cytosine make triple H-bond with Guanine.

• Nucleoside is formed by combination of nitrogeneous base and pentose sugar.

What is Nucleic Acid?

→ These are the chemicals or molecules which are responsible for inheritance of characters. They are present in nucleus of cell.

They are mainly of two types: DNA and RNA

Answer 2

Answer:

The correct answer is both RNA and DNA .because sometimes DNA also have single strand of nucleotides.