Which of the following statements regarding ELISAs is TRUE?
A) They are not quantitative.
B) They require large amounts of serum.
C) The antibody label is a fluorescent molecule.
D) They can be used to detect antibody or antigen.
E) They involve the use of membrane filters.
D
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Which special property of Taq polymerases make them useful for PCR?
a. they are stable at high temperatures b. their hydrogen bonds do not break at low pHs c. they multiply quickly d. they are easy to isolate from common fungi e. they paste two DNA fragments together
The accompanying figure shows a triglyceride that is liquid at room temperature
Indicate whether the statement is true or false
During which meiotic phase does crossing over occur?
A) anaphase I of meiosis I B) anaphase II of meiosis II C) prophase I of meiosis I D) prophase II of meiosis II
A major difference between allopatric and sympatric speciation is whether
A. resulting species are reproductively isolated or not. B. gene flow continues to occur or not. C. two or three species result. D. geographic isolation is required or not. E. the new species are separated by a prezygotic or postzygotic isolating mechanism.