Explain the applications for polymerase chain reaction technology.
What will be an ideal response?
Answers will vary but should include the following:
PCR can be used in research laboratories to create copies of segments of DNA very quickly. The process is specific to copying only a targeted DNA sequence. The technique can be used to help create copies of various genes that can be beneficial to genetic engineering. Copies of evidence from a crime scene can be produced to help convict or prove the innocence of a person. PCR can be used in any circumstance in which a large amount of specific DNA is required.
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Which is the proper order of organization?
a. Cells, organs, tissues b. Cells, tissues, organs c. Organs, tissues, organs systems d. Organs, cells, tissues e. Tissues, organs, cells.
Ribosomes exist either free in the cytoplasm or attached to the membranes of
____________________. What will be an ideal response?
You briefly expose bacteria undergoing DNA replication to radioactively labeled nucleotides. When you centrifuge the DNA isolated from the bacteria, the DNA separates into two classes
One class of labeled DNA includes very large molecules (thousands or even millions of nucleotides long), and the other includes short stretches of DNA (several hundred to a few thousand nucleotides in length). These two classes of DNA probably represent _____. A) leading strands and Okazaki fragments B) lagging strands and Okazaki fragments C) Okazaki fragments and RNA primers D) leading strands and RNA primers
The earth's crust and Human bodies are made of the same elements in similar amounts.
a. true b. false