1. The total of all an individuals DNA and he functional sub-unit within DNA that synthesizes one or more polypeptides are known, respectively, as
A. genome and genotype
B. phenotype and protein dehydration synthesis
C. genome and gene
D. codon and anticodon
I think it's D.
2. A permanent change in the genetic material of living tissue is called a
A. somatic cell mutation
B. germ line mutation
C. viral germ line mutation
D. somatic cell transformation
I think it's A (or B)??
3. All of the following are examples of physical mutagens except
A. gamma rays
B. nitrates, benzene, gasoline fumes, PCBs
C. high energy X-rays
D. ultra-violet light rays
4. DNA in the nucleus of human cells is made of equal combination of DNA from mother and from father. However, mtDNA is genetically identical to
A. only the mother's mtDNA
B. equal amounts of mother's and father's mtDNA
C. (XX) + (XY) = 3:1 ratio of 3 parts mother's mtDNA: 1 part father's mtDNA
D. only the father's mtDNA
I think it's A because mtDNA is passed from mother to the child.
5. Which statement correctly accounts for the fact that mtDNA is passed only from mother to child?
A. Eggs contain mitochondria and sperm do not.
B. mtDNA is transcribed from a template on the XX chromosome set.
C. An egg contributes both its nucleus and its cytoplasm to a zygote, and a sperm contributes only it's nucleus.
D. mtDNA is transcribed from a template on the XY chromosome set.
I think B or D.
6. All of the following are correct statements about the DNA microarray tool except that
A. individual cells contain a nucleic acid sequence that bind with one of the mRNA molecules during gene expression.
B. it is scanned and analyzed to compare patterns of gene expression in each cell.
C. it allows scientists to analyze the activity of thousands of genes at once.
D. it provides a pattern of bands into which DNA fragments sort by mass and charge.
7. All of the following are correct statements about the purpose of DNA microarray technology except to
A. place a fluorescent chemical tag in DNA to locate a specific gene marker for a trait
B. identify genes that are responsible for specific functions
C. compare genes expressed in normal healthy cells with those in cancerous cells.
D. compare the genes expressed by the same cell in various environments.
I think A.
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