If an animal cell is placed in a solution of saltwater, but there is no change in the volume of the cell, what is most likely happening to the water inside the cell?
A. There is no water movement, into or out of the cell.
B. The water is moving out of the cell
C. The water is moving into the cell
D. The salt is moving into the cell
E. More than one above is correct
Answer: E. More than one above is correct
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Which of the following does NOT occur during transcriptional regulation in eukaryotes?
A. Chromatin is converted to the closed conformation. B. The gene must be transcribed. C. The RNA must be processed and exported from the nucleus. D. The protein must be made via translation. E. Chromatin is converted to the open conformation.
To a person studying utilization of cage space for lions in a zoo, the most useful data would be expressed by the number
of ____.
a. total lions b. lions per square foot c. lions per cage per room d. cages per zoo e. lions of each age
Mitotic Cdk-cyclin is active when it is
A) singly phosphorylated. B) acetylated. C) doubly phosphorylated. D) doubly methylated. E) cleaved by proteases.
Ingesting a small number of Clostridium botulinum endospores is generally __________.
A) problematic B) not problematic