Why is it necessary to include the ?-galactosidase gene in a BAC?
A. ?-galactosidase is a negative selectable marker.
B. ?-galactosidase is a positive selectable marker.
C. ?-galactosidase confers resistance to several antibiotics.
D. Presence of ?-galactosidase indicates cloned DNA segment is present.
E. Absence of ?-galactosidase indicates cloned DNA segment is present.
E
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Members of the ________ genus are the MOST abundant bacteria present in the large intestine of humans and contain the unusual ________ in their cell membranes
A) Bacteroides / glycerolipids B) Bacteroides / sphingolipids C) Sphingobium / glycerolipids D) Sphingobium / sphingolipids
The ____ horizon extends to the underlying bedrock, and consists of mineral particles and rock fragments but
generally no organic material?
a. A b. B
c. C d. D e. O
The forced inhalation volume is equal to about
__________ milliliters. a. 500 b. 1,100 c. 2,900 d. 3,400 e. 4,700
Allergy shots require many injections over long periods of time to be effective. Why can't the body get over an allergy with just a couple of injections?
What will be an ideal response?