What is the way to maintain biodiversity while encouraging protection of the exi

Question

What is the way to maintain biodiversity while encouraging protection of the existing environments?

A. By cloning endangered and extinct species

B. By means of the gene bank

C. By using metagenomics

D.  By introducing stacked traits

All of the following items are included in a genetic construct for insertion into a plant genome except

A. A promoter

B. A gene(s)

C. An operator

D. A selectable marker

Genetically modified plants currently under production and on the market exhibit all of the following traits except

A. RoundUp ready

B. Bt toxin

C. Virus resistance

D. Beta-carotene synthesis

What is the benefit of engineering pathogen-resistant plants?

A. An entire plant can be regenerated from a single totipotent cell

B. A transgene can be turn on and off in every plant cell

C. It prevents millions of dollars in crop losses due to infection of crop species

D. The Ti plasmid can enter the plant cell similar to bacterial conjugation

______ is a method of inserting foreign genes into a plant.

A. Bacterial transformation

B. Transfection

C. Conjugation

D. Callus culture

A. By cloning endangered and extinct species

B. By means of the gene bank

C. By using metagenomics

D.  By introducing stacked traits

Explanation / Answer

1. Biodiversity refers to the variability among different organisms and refers to maintaining a diverse group or wide range of species in the environment. Some species are endangered and may become extinct in future, which will in turn affect biodiversity. Thus, it is important to retain some components of each such species.

The gene banks serve as biological repositories for preserving genetic materials. Gene banks in form of seed bank, tissue bank, field gene bank, cryo-bank, serve to be the most suitable way to preserve biodiversity.

Thus, option B is correct.

2. During gene transfer in plants, the components that are inserted include: The transgene or gene(S) of interest, a promoter sequence that will control the initiation and expression of the gene, marker genes (like antibiotic Agromycin).

Operator is not necessary for gene transfer in plants.

Thus, option C is correct.

3. Genetically modified crops or GM crops are genetically engineered plants with a gene expressing a new trait is introduced in the plant. Round up ready crops are modified, containing herbicide resistant (glyphosate) gene called Round up (Monsanto herbicide). Round up ready are terminator seeds and cannot be reused.

Thus, option A is correct.

4. Plant pathogens plays the most significant role in crop destruction. Thus, GM crops with disease resistant traits (like insect pests, virus), are commercially beneficial.

Thus, option C is correct.

5. One of the important method of inserting a transgene in plants, is the use of Agrobacterium based Ti plasmid. These plasmids or other naked forms of nucleic acids can be introduced in eukaryotic cells, including plant cells by process of transfection.

Thus, option B is correct.

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