The introduction of t-DNA into plants involves?
1. Infection of the plant by Agrobacterium tumefaciens
2. Altering the pH of the soil, heat-shocking the plants
3. Exposing the plants to Cold for a brief period
4. Allowing the plant roots to stand in water
Which of the following is not correctly matched for the organism and its cell wall degrading enzyme?
1. Plant cells- cellulose
2. Algae - Methylase
3. Fungi - Chitinase
4. Bacteria - Lysozyme
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
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 |
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
In the screening process, clones that metabolize X-gal turn
1. yellow
2. orange
3. blue
4. colorless
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 |