Q. No.Satellite DNA is important because it:
1.
Codes for proteins are needed in the cell cycle.
2.
Shows a high degree of polymorphism in the population and also the same degree of polymorphism in an individual which is inheritable from parents to children.
3.
Does not code for proteins and is the same in all members of the population.
4.
Codes for enzymes needed for DNA replication.
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:
2. G/17%, A/16.5%, T/32.5%
3. G/17%, A/33%, T/33%
4. G/8.5%, A/50%, T/24.5%
Which one of the following is wrongly matched?
| 1. | Transcription- Writing information from DNA to t-RNA |
| 2. | Translation- Using the information in m-RNA to make protein |
| 3. | Repressor protein- Binds to an operator to stop enzyme synthesis |
| 4. | Operon- Structural genes, operator, and promoter |
Transformation was discovered by:
1. Meseson and Stahl
2. Hershey and Chase
3. Griffith
4. Waston and crick
An analysis of chromosomal DNA using the Southern hybridization technique does not use:
1. Electrophoresis
2. Blotting
3. Autoradiography
4. PCR
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 - Erwin 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
Select the correct option:
| Direction of RNA synthesis |
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' |
| 1. | 1 | 2. | 2 |
| 3. | 3 | 4. | 4 |
Commonly used vectors for human genome sequencing are:
| 1. | T-DNA | 2. | BAC and YAC |
| 3. | Expression Vectors | 4. | T/A cloning Vectors |
Which enzyme(s) will be produced in a cell in which there is a non-sense mutation in the lac Y gene?
| 1. | Lactose permease |
| 2. | Transacetylase |
| 3. | Lactose permease and transacetylase |
| 4. | β - galactosidase |
Removal of RNA polymerase III from nucleoplasm will affect the synthesis of:
1. tRNA
2. hnRNA
3. mRNA
4. rRNA
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