Gels/Biotech

Which best describes recombinant DNA?

• Genes are taken from one organism and inserted in another to direct the production of a protein
• DNA that has been deactivated by enzymes
• DNA found in organelles other than the nucleus
• Genes developed when an egg and sperm fuse to form a zygote

Which best explains the limited success of plasmid uptake by bacteria?

• Bacteria may take up the DNA but never express it.
• Bacteria die upon the uptake of foreign DNA
• Foreign DNA causes bacteria to undergo aptopsis
• Buffer solutions denature DNA before uptake occurs

Which process can alter a plant to become resistant to pests?

• recombinant DNA
• cloning
• gel elctrophoresis
• stem cell differentiation

During the process of gel electrophoresis, molecules are separated as they are pulled by an electric current through a molecular filter. Which best describes how molecules are separated?

• precisely by both size and charge
• approximately by size and charge
• by size only
• by charge only

Which describes the application of DNA technology that takes undifferentiated cells and treats a wide variety of diseases?

• stem cell research
• cloning
• Human Genome Project
• genetically modified organisms

Which could be a benefit of stem cell research? 

• stem cells can help to regrow damaged vital tissue
• stem cells are only found in human embryos
• there is little ethical debate on the topic of stem cell research
• other countries have already begun research using human stem cells

For which aspect is DNA profiling most useful?

• to determine the presence of a defective gene in an individuals genome
• to determine the nitrogenous bases
• to identify the organic molecules making up nucleic acids
• to identify the sequence of sugars and phosphates in nucleic acids

A scientist removed the nucleus from 2 different mice egg cells. The nucleus from one was placed in the denucleated cell from the other. The cell was stimulated to begin dividing and the resultant embryo was placed into a surrogate mouse until birth. The offspring is genetically identical to the egg nucleus donor. This concept describes...

• cloning
• surrogacy
• recombinant DNA
• in vitro fertilization 

Which recently developed technology has been used in determining the history of human ancestry? 

• DNA sequencing
• fossil record
• sonar imaging equipment
• scanning electron microscope

Tags

NGSS.HS-LS4-1

NGSS.HS-LS3-2

NGSS.HS-LS4-2

Why do the fragments of DNA in gel electrophoresis travel away from the negative electrode?

• DNA is negatively charged
• DNA is positively charged
• the agarose gel in negatively charged
• the agarose gel is positively charged