Nucleic Acids

Q.

DNA and RNA differ structurally in respect of

1. Base unit
2. Sugar unit
3. Phosphodiester unit
4. Both base and sugar units

Q.

Some statements are given below

A) The sugar present in RNA is D - ribose

B) Adenine forms 3 hydrogen bonds with Thymine

C) Phosphate ester of nucleoside is nucleotide

D) Cytosine is not present in RNA but present in DNA

Among these statements

1. Only B, C are correct

2. Only A, C are correct

3. Only A, C, D are correct

4. Only A, D are correct

Q. The correct statement regarding RNA and DNA respectively is :

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1. The sugar component in RNA is ribose and the sugar component in DNA is 2'-deoxyribose
2. The sugar component in RNA is arabinose and the sugar component in DNA is ribose
3. The sugar component in RNA is arabinose and the sugar component in DNA is 2'-deoxyribose
4. The sugar component in RNA is 2'-deoxyribose and the sugar component in DNA is arabinose

Q. The complementary strand for the following single strand of DNA is:
$5^{\prime }\leftarrow A-T-G-C-T\to 3^{\prime }$

1. $3^{\prime }\leftarrow T-A-C-G-A\to 5^{\prime }$
2. $5^{\prime }\leftarrow T-A-C-G-A\to 3^{\prime }$
3. $5^{\prime }\leftarrow A-A-C-G-T\to 3^{\prime }$
4. $3^{\prime }\leftarrow A-T-G-C-T\to 5^{\prime }$

Q.

Nucleic acids are the polymers of
(a) nucleosides (b) nucleotides (c) bases (d) sugars

Q.

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

Q.

Which of the following are purine bases?
(a) Guanine (b) Adenine (c) Thymine (d) Uracil

Q.

Waht are nucleic acids? Mention their two important functions.

Q. mRNA part that codes for the amino acid serine, is:

1. AMP
2. ADP
3. UCA
4. d ATP

Q. What are three types of RNA molecules?