Explain what happens in exponential population growth
What will be an ideal response?
The population grows by a fixed percentage of its size during each time period, so that the actual number of individuals added to the population grows at an ever-increasing rate.
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P53 is a ____
a. transcription factor that turns on expression of cell division inhibiting proteins b. protein encoded by an oncogene c. protein that promotes entry into the cell cycle when DNA is undamaged d. hormone used to treat cancer e. growth promoting factor
During binary fission, each daughter cell inherits a copy of the original circular chromosome. What mechanism transfers a copy into each new cell?
a. After replication the chromosomes acquire a negative charge, repelling each other. b. FtsZ proteins between the chromosomes build temporary spindles, pushing them apart. c. Each chromosome attaches to the plasma membrane and is drawn apart as the cell elongates. d. The FtsZ ring forms in the middle of the chromosomes, separating them as the septum expands.
A DNA molecule that can accept foreign DNA and be replicated inside a host cell is known as a ____
a. genetic probe b. DNA library c. recombinant DNA d. cloning vector e. restriction enzyme
_____ are RNA molecules that can catalyze reactions like protein enzymes do
1.Initiation factors 2.Ribozymes 3.Elongation factors 4.Poly A polymerases 5.Release factors