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Q. No.Nucleic acids are polymers of:
| 1. | Nucleosides | 2. | Nucleotides |
| 3. | Amino acids | 4. | Polypeptides |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of the following is a pyrimidine base found in DNA?
| 1. | Adenine | 2. | Guanine |
| 3. | Uracil | 4. | Cytosine |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyTo form a nucleoside, a nitrogenous base is linked to a pentose sugar:
| 1. | Through a P-Glycosidic linkage at carbon atom number 1 |
| 2. | Through a P-Glycosidic linkage at carbon atom number 5 |
| 3. | Through an N-Glycosidic linkage at carbon atom number 1 |
| 4. | Through an N-Glycosidic linkage at carbon atom number 5 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn a strand of nucleic acid, two nucleotides are linked together by:
1. 3’ – 5’ phosphodiester bond
2. 5’ – 3’ phosphodiester bond
3. 2’ – 5’ phosphodiester bond
4. 3’ – 1’ phosphodiester bond
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe base pairing in a double stranded DNA is correctly described as:
| 1. | Similar | 2. | Identical |
| 3. | Complementary | 4. | Synergistic |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of the following is not a feature of the double helix model of DNA?
| 1. | The two chains have anti-parallel polarity |
| 2. | A purine always comes opposite to a pyrimidine |
| 3. | The pitch of the DNA is 3.4 nm |
| 4. | The two chains are coiled in a left handed fashion |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe distance between a base pair in the DNA double helix is approximately:
| 1. | 2.0 nm | 2. | 0.34 nm |
| 3. | 20 nm | 4. | 3.4 nm |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe central dogma of molecular biology was proposed by:
| 1. | Francis Crick | 2. | James Watson |
| 3. | Rosalind Franklin | 4. | Erwin Chargaff |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn some viruses, the flow of genetic information is from RNA to DNA. These viruses are:
| 1. | Reverse transcriptases | 2. | Reoviruses |
| 3. | Ribozymes | 4. | Retroviruses |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe length of DNA in a typical mammalian cell is approximately:
1. 1.1 meter
2. 1.5 meter
3. 2.2 meter
4. 3.3 meter
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