Which of the following is not a feature of a bacterial artificial chromosome (BAC) vector?
A. CEN sequences
B. origin of replication (ori)
C. par genes
D. selectable antibiotic resistance gene
E. cloning site within the ?-galactosidase gene
A
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Blood is pumped from the heart into the arterial system, which branches from arteries into fine _________.
A. arterioles B. veins C. capillaries D. venules
Synthetic organic compounds such are chlorofluorocarbons (CFCs) are damaging to the world's fresh water supply.
a. true b. false
A ________ ring is the characteristic feature present in BOTH cephalosporins and penicillins produced by fungi. Semisynthetic versions of these drugs typically ________ this ring structure with other functional groups
a. ?-lactam / add to b. ?-lactam / replace c. lactone / add to d. lactone / replace
Which element is considered an essential micronutrient for plants?
a. zinc b. potassium c. hydrogen d. arsenic e. platinum