Sickle cell anemia is caused by:

1. Chromosomal aberration 2. Point mutation
3. Non-disjunction event 4. An arthropod vector

Subtopic:  Mutations and Genetic Code |
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Whose cell free system finally helped the genetic code to be deciphered?

1.Gamow2.Severo Ochoa
3.Hargobind Khorana4.Marshall Nirenberg 

Subtopic:  Genetic Code |
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Which of the following would be nucleoside found only in RNA?

1. Thymidine 2. Cytidine
3. Uridine 4. Adenosine

Subtopic:  DNA vs RNA as Genetic Material |
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Which of the following acts as the substrate and provides energy for DNA replication?

1. Dideoxyribonucleoside triphospahtes
2. Ribonucleoside triphosphates
3. Deoxyribonucleoside triphospahtes
4. Deoxyribonucleotide triphosphates

Subtopic:  DNA Replication: I |
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Which of the following is not a stop codon?

1. UAA 2. UGA
3. UAC  4. UAG

Subtopic:  Genetic Code: I | Genetic Code: II | Genetic Code: III |
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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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