How is the Ti plasmid used to create transgenic plants?
a. The Ti plasmid allows all of the plant cells to host the bacteria Rhizobium radiobacter and
thus express the foreign gene that was inserted into the bacterial chromosome.
b. The Ti plasmid inserts the foreign gene directly into the plant's nuclear DNA.
c. Once the Rhizobium radiobacter forms a tumor in the plant, the tumor cells can take up
the foreign DNA and incorporate it into their chromosomes.
d. The Ti plasmid inserts the foreign DNA into the DNA in the chloroplast.
e. The Ti plasmid inserts the foreign DNA into the plant's mitochondrial DNA.
B
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The Meselson-Stahl experiments supported the model of dispersive DNA replication
Indicate whether the statement is true or false
For some virulent phages, fragments of the host DNA may be included in the heads as the viral particles assemble,
providing the basis for ____.
a. transformation b. transmutation c. metabolism d. specific transduction e. generalized transduction
The first known multicellular organisms evolved approximately how many years ago?
A. 3.5 BYA B. 1.4 BYA C. 2.1 BYA D. 100 MYA
Give the sex of the following people assuming that the autosomes are present in the normal number. XO; XY; XXY. Answers are in order (respectively)
A) male; male; female B) male; female; female C) female; male; female D) female; male; male E) male; male; male