A(n) ________ is composed of a light-harvesting complex of chlorophyll pigments and an electron transport system
Fill in the blank(s) with correct word
photosystem
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Which is a characteristic of a plasmid used as a cloning vector? (Select all that apply.)
A) contains a selectable marker B) contains an origin of replication C) has several unique recognition sites for restriction enzymes D) integrates into the host chromosome E) can hold an insert of up to 300 kb
Lipid rafts are associated with which of the following activities?
A) responding to extracellular signals B) transport of nutrients across cell membranes C) immune responses D) transport of cholera toxin into cells E) All of the above are correct.
The secondary immune response ____
a. is slower and weaker than the primary response b. is dependent upon effector cells c. is dependent upon memory cells d. responds only one time to an antigen challenge e. is a major component of the innate immune response
Movement of soluble organic material through sieve tube members occurs through ____.
A. translocation B. active transport C. cohesion-tension D. transpiration E. facilitated transport