In the biology lab, you observe animal cells under a microscope. In one slide you see the nucleus with two nucleolus areas of compact chromatin. The value in packaging DNA in tighter forms of chromatin is for
A. regulation and protection of the DNA during transcription.
B. ensuring that sister chromatids will be attached prior to replication.
C. mobility and protection of the DNA molecule during mitosis.
D. prevention of ligase enzyme action during replication.
E. Both DNA mobility and protection and regulation in mitosis and transcription.
E. Both DNA mobility and protection and regulation in mitosis and transcription.
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Scientists estimate that carbon dioxide in the atmosphere has increased by 35% in the last 150 years
Indicate whether the statement is true or false.
Emotional states are the responsibility of the
a. medulla. b. corpus callosum. c. limbic system. d. cerebral cortex. e. cerebellum.
What are biosensors and how are they used?
What will be an ideal response?
To get into the nucleus a component has to have the correct signal sequence and pass through a nuclear pore.
a. true b. false