Answer the following statements true (T) or false (F)
1. and inactivated tumor suppressor genes, epigenetic changes in gene expression are seen in cancer.
2. In 2010, a federal judge in the U.S. ruled seven patents on the BRCA1 and BRCA2 genes had been improperly granted.
3. RNA interference was discovered in 1998.
4. Both gene silencing and genome editing techniques are limited by "off-target effects"—doing something other than what we want them to do.
1. True
2. True
3. True
4. True
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What organisms convert gaseous nitrogen into ammonium or nitrates that can be used by plants?
a. tertiary consumers b. nitrogen-fixing bacteria c. fish d. legumes e. corn and other grains
Which of the following describes the construction of a metagenomic library?
A. A sample of ocean water is collected, the DNA is extracted and fragmented, then inserted into plasmid vectors before sequencing using the Sanger chain termination method. B. A sample of ocean water is collected and the organisms present are sequenced, which allows construction of a library containing the whole genome. C. A sample of ocean water is collected, the microbes are cultured on saline agar, then their DNA is extracted and sequenced using the Sanger method before constructing a library. D. A sample of ocean water is collected, the DNA is extracted and fragmented, then next-generation sequencing leads to the alignment of the 100-300 bp sequences to known microbial genomes.
As a primary oocyte develops within a follicle of the ovary, it is nourished by ________ cells
Fill in the blank(s) with correct word
Horseradish peroxidase and alkaline phosphatase are enzymes used in _____ tests.
Fill in the blank(s) with the appropriate word(s).