Restriction endonuclease:
1. cuts the DNA molecule randomly
2. cuts the DNA molecule at specific sites
3. restricts the synthesis of DNA inside the nucleus
4. synthesis DNA
Following statements describe the characteristics of the enzyme Restriction Endonuclease. Identify the incorrect statement:
1. | The enzyme recognizes a specific palindromic nucleotide sequence in the DNA |
2. | The enzyme cuts DNA molecules at an identified position within the DNA |
3. | The enzyme binds DNA at specific sites and cuts only one of the two strands |
4. | The enzyme cuts the sugar-phosphate backbone at specific sites on each strand |
DNA precipitation, out of a mixture of biomolecules, can be achieved by treatment with:
1. Chilled chloroform
2. Isopropanol
3. Chilled ethanol
4. Methanol at room temperature
Which of the following equipment is essentially required for growing microbes on a large scale for the industrial production of enzymes?
1. | Bioreactor | 2. | BOD incubator |
3. | Sludge digester | 4. | Industrial oven |
In the screening process, clones that metabolize X-gal turn
1. yellow
2. orange
3. blue
4. colorless
In attempts to confer special characteristics upon plants, genetic engineers find Agrobacterium tumefaciens to be an effective vector for use with
1. corn
2. rice
3. wheat
4. soy beans
Restriction endonucleases are enzymes which:
1. | make cuts at specific positions within the DNA molecule |
2. | recognize a specific nucleotide sequence for binding of DNA ligase |
3. | restrict the action of the enzyme DNA polymerase |
4. | remove nucleotides from the ends of the DNA molecule |
Which one is a true statement regarding DNA polymerase used in PCR?
1. It is used to ligate introduces DNA in recipient cells
2. It serves as a selectable marker
3. It is isolated from a virus
4. It remains active at high temperatures
The first type II restriction endonuclease whose functioning depended on a specific DNA nucleotide sequence was:
1. EcoRI
2. HindII
3. SmaI
4. BamHI