The movement of organic compounds throughout plants is described as ____.
A. cohesion-tension
B. source-to-sink
C. facilitated transport
D. active transport
E. transpiration pull
Answer: B
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Forms of the Ras protein found in tumors usually cause which of the following?
A) DNA replication to stop B) DNA replication to be hyperactive C) cell-to-cell adhesion to be nonfunctional D) cell division to cease E) excessive cell division
The damage caused by parasites may be due to
A. competition for nutrients. B. the physical blocking of organs. C. the direct digestion of host tissue. D. the host's immune response. E. All of the choices are correct.
DNA ligase closes nicks between ____ by forming ____ bonds
a. nitrogenous bases; hydrogen b. RNA fragments; noncovalent c. DNA and RNA fragments; covalent d. DNA fragments; peptide e. DNA fragments; covalent
Primaquine and chloroquine are drugs used in the treatment of ________ infections.
A. gram-negative bacterial B. gram-positive bacterial C. viral D. protozoan E. fungal