Answer the following statements true (T) or false (F)
1. A simple dot matrix is the best method to identify homologous sequences from a known sequence.
2. If a gene's sequence is compared among several different vertebrates and they are found to be 95% homologous, one can assume that the genes are derived from the same ancestral gene.
3. Sequences that are alike will produce a horizontal line in a dot matrix analysis.
4. The current genome databases are biased towards species that are important from a research, medical, or agricultural perspective.
1. FALSE
2. TRUE
3. FALSE
4. TRUE
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Non-virulent bacteria can be prevented from being transformed into virulent bacteria if the debris from heat-killed virulent bacteria is first treated with: (choose all that apply)
A. DNase. B. RNase. C. protease. D. no enzyme.
Four of the five choices listed below are made only
of gametophyte tissue. Select the exception. a. pollen grains b. megaspore c. ovule d. pollen tube e. male gametophyte
The primary difference between enhancers and promoter-proximal elements is that enhancers _____
A) are transcription factors; promoter-proximal elements are DNA sequences B) enhance transcription; promoter-proximal elements inhibit transcription C) are at considerable distances from the promoter; promoter-proximal elements are close to the promoter D) are DNA sequences; promoter-proximal elements are proteins
One of your professors says that fleas jump so high because they have specially adapted leg structures and muscles. But your other professor says that fleas jump high because evolution selected for individuals with genes that helped them avoid being damaged by the scratching behavior of their host. So -- why do fleas jump high?
A. Because evolution selected for individuals with genes that helped them avoid being damaged by the scratching behavior of their host. B. The proximate cause is that they have specially adapted leg structures and muscles, and the ultimate cause is that evolution selected for individuals with genes that helped them avoid being damaged by the scratching behavior of their host. C. The ultimate cause is that they have specially adapted leg structures and muscles, and the proximate cause is that evolution selected for individuals with genes that helped them avoid being damaged by the scratching behavior of their host. D. Because they have specially adapted leg structures and muscles.