Stable annealing due to hydrogen bonding between DNAs of similar nucleotide sequence from different organisms is referred to as ________.
A. hybridization
B. hydrolysis
C. restriction
D. ligation
Answer: A
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The concentration of virus that infects or kills 50% of the host cells is referred to as the
A. LD50. B. ID50. C. ID100. D. LD100. E. LD50 AND ID50.
In order to prove that a bacterium is pathological according to Koch’s postulates, the ____
a. bacteria must be present in most cases of the disease b. bacteria must be isolated from the infected host and grown in mixed culture c. specific disease must be induced when a pure culture of the bacteria is introduced into a healthy host d. bacteria must be isolated from a transfer host e. bacterium must produce spores that can be transmitted from one individual to another
Frozen water is more dense than liquid water
Indicate whether the statement is true or false
Plasma in a blood vessel is separated from cells by interstitial fluid
Indicate whether the statement is true or false.