Q. No.Which one of the following represents a palindromic sequence in DNA?
1. 5' - GAATTC - 3'
3' - CTTAAG - 5'
2. 5' - CCAATG - 3'
3' - GAATCC - 5'
3. 5' - CATTAG - 3'
3' - GATAAC - 5'
4. 5' - GATACC - 3'
3' - CCTAAG - 5'
1. 5' - GAATTC - 3'
3' - CTTAAG - 5'
2. 5' - CCAATG - 3'
3' - GAATCC - 5'
3. 5' - CATTAG - 3'
3' - GATAAC - 5'
4. 5' - GATACC - 3'
3' - CCTAAG - 5'
What is it that forms the basis of DNA Fingerprinting?
| 1. | The relative proportions of purines and pyrimidines in DNA. |
| 2. | The relative difference in the DNA occurrence in blood, skin, and saliva. |
| 3. | The relative amount of DNA in the ridges and grooves of the fingerprints. |
| 4. | Satellite DNA occurring as highly repeated short DNA segments |
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Read the following four statements (A-D):
(A) In transcription, adenosine pairs with uracil.
(B) Regulation of lac operon by repressor is referred to as positive regulation.
(C) The human genome has approximately 50,000 genes.
(D) Haemophilia is a sex-linked recessive disease.
How many of the above statements are right ?
1. Two
2. Three
3. Four
4. One
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The diagram shows an important concept in the genetic implication of DNA. Fill in the blanks A to C.
1. A - translation B - transcription C - Erevin Chargaff
2. A -transcription B - translation C - Francis Crick
3. A - translation B - extension C - Rosalind Franklin
4. A - transcription B - replication C - James Watson
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Transformation was discovered by :
1. Meseson and stahl
2. Hershey and chase
3. Griffith
4. Waston and crick
Select the correct option:
|
The direction of RNA synthesis |
The direction of reading of the template DNA strand |
|
|
1. |
5' - 3' |
3' - 5' |
|
2. |
3' - 5' |
5' - 3' |
|
3. |
5' - 3' |
5' - 3' |
|
4. |
3' - 5' |
3' - 5' |
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Commonly used vectors for human genome sequencing are:
1. T - DNA
2. BAC and YAC
3. Expression Vectors
4. T/A Cloning Vectors
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In sea urchin DNA, which is double stranded, 17% of the bases were shown to be cytosine. The percentages of the other three bases expected to be present in this DNA are :
1. G 17%, A 16.5%, T32.5%
2. G 17%, A 33%, T 33%
3. G8.5%, A50%, T24.5%
4. G 34%, A 24.5%, T 24.5%
Satellite DNA is important because it:
| 1. | shows a high degree of polymorphism in the population and also the same degree of polymorphism in an individual, which is heritable from parents to children |
| 2. | does not code for proteins and is the same in all members of the population |
| 3. | codes for enzymes needed for DNA replication |
| 4. | codes for proteins needed in the cell cycle |
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Which of the following is required as inducer(s) for the expression of Lac operon?
1. lactose and galactose
2. glucose
3. galactose
4. lactose
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