Which statement is false with regard to mutations?
A. They are always dangerous.
B. They can occur as DNA replication errors.
C. They cannot be repaired after replication.
D. They may become cancerous.
E. They can be passed on to the next generation.
Answer: A
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Which of the following is in the coding region of a gene?
A. Trailer B. Promoter C. Leader D. None of the choices are correct.
Which of the following statements about differentiated cells is not correct?
A. Transfer of a nucleus from a fully differentiated cell into an unfertilized egg with no nucleus can support the development of an entire organism. B. Cells become differentiated because of changes in nuclear gene expression. C. Cells become differentiated because genes that are not being expressed are deleted. D. Differentiated cells contain a complete genome. E. Mammals have been cloned from completely differentiated cells.
The heart damage associated with Lyme disease is
a. rheumatic fever b. hypertension c. endocarditis d. myocarditis e. malignant melanoma
A microbiologist is working with a bacteria strain to determine if cells are competent. Cells are grown under optimal conditions with DNA fragments that carry two genes, green fluorescent protein and ampicillin resistance, and then plated to nutrient agar with and without ampicillin. Following incubation, plates are examined for fluorescent colonies under a UV lamp. Predict the results if cells are competent.
A. Fluorescent colonies will be present on both types of plates. B. Fluorescent colonies will be present on the ampicillin agar plates, but there will be no growth on the nutrient agar plates. C. There will be no growth on either type of plate. D. Colonies will be present on both types of plates, but will only fluoresce on the ampicillin agar plates.