In some viruses, the flow of genetic information is from RNA to DNA. These viruses are:

1. Reverse transcriptases 2. Reoviruses
3. Ribozymes 4. Retroviruses

Subtopic:  DNA Double Helix |
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In a transcription unit, with respect to structural genes, the promoter is located:

1. Upstream and 5’ 2. Upstream and 3’
3. Downstream and 5’ 3. Downstream and 3’

Subtopic:  Transcription: I |
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Which of the following codons has a dual role in the genetic code?

1. AUG 2. GUG
3. CUG 4. UUG
Subtopic:  Genetic Code: I | Genetic Code: II |
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Frederick Griffith discovered:

1. DNA is the genetic material
2. RNA can be the genetic material
3. Streptococcus has two strains
4. Bacterial transformation

Subtopic:  Search for Genetic Material |
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In Avery, Macleod, and McCarty's experiment, the transformation of bacteria was inhibited by:

1. Proteases 2. RNase
3. DNAs 4. None of these

Subtopic:  Search for Genetic Material |
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Which of the following is a pyrimidine base found in DNA?

1. Adenine 2. Guanine
3. Uracil 4. Cytosine

Subtopic:  The DNA |
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Which of the following is also called soluble RNA?

1. tRNA  2. rRNA
3. mRNA 4. siRNA
Subtopic:  Translation |
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A typical nucleosome unit consists of about:

1. 60 base pairs 2. 140 base pairs
3. 200 base pairs 4. 400 base pairs

Subtopic:  DNA Packaging |
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At any instant, RNA is transcribed on which of the following strands of DNA?

1. Coding strand 2. Template strand
3. Lagging strand 4. Leading strand

Subtopic:  Transcription: I |
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To 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

Subtopic:  The DNA |
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