A segment of DNA coding for a polypeptide is most accurately defined as:

1. Operon 2. Gene
3. Recon 4. Cistron

Subtopic:  Transcription |
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The central dogma of molecular biology was proposed by:

1. Francis Crick 2. James Watson
3. Rosalind Franklin 4. Erwin Chargaff

Subtopic:  DNA Double Helix |
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The unequivocal proof that DNA is the genetic material was provided by:

1. Avery, Macleod, and McCarty
2. Hershey and Chase
3. Meselson and Stahl
4. Watson and Crick

Subtopic:  Search for Genetic Material |
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Hershey and Chase proved DNA as the genetic material in their experiment because :

1. Bacteria that were infected with viruses that had radioactive proteins were not radioactive.
2. Bacteria that were infected with viruses that had radioactive DNA were radioactive.
3. Both 1 and 2 are correct.
4. Both 1 and 2 are incorrect.

Subtopic:  Search for Genetic Material |
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DNA replication is correctly described as:

1. Semi-conservative and Continuous
2. Semi-conservative and Discontinuous
3. Conservative and Continuous
4. Semi-conservative and Semi-discontinuous

Subtopic:  DNA Replication |
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According to Erwin Chargaff, in a double-stranded DNA

1. The ratios between Adenine and Thymine, and, Guanine and Cytosine are constant and equal.
2. The ratios between Adenine and Thymine, and, Guanine and Cytosine are constant but are not equal to one.
3. The ratios between Adenine and Guanine, and, Thymine and Cytosine are constant and equal.
4. The ratios between Adenine and Guanine, and, Thymine and Cytosine are constant but are not equal to one.

Subtopic:  DNA Double Helix |
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The backbone of a polynucleotide chain is made of:

1. Sugar and nitrogenous bases
2. Phosphate and nitrogenous bases
3. Sugar and phosphate
4. Sugar, phosphate, and nitrogenous bases

Subtopic:  The DNA | DNA Double Helix |
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Which of the following acts as a ribozyme for peptide bond formation in bacteria?

1. 5s rRNA 2. 23s rRNA
3. 16s rRNA 4. 5.1s rRNA
Subtopic:  Translation |
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In actual structure, tRNA is a compact molecule that looks like a/an:

1. Cloverleaf 2. Railroad
3. Inverted L 4. Alpha helix

Subtopic:  Translation |
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During DNA packaging in eukaryotic cells, Non-Histone Chromosomal proteins:

1. Are not required
2. Are required from the beginning to the end of the packaging
3. Are required only for earlier stages of packaging
4. Are required for a higher level of packaging

Subtopic:  DNA Packaging |
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