What activates CREB?
A. Binding of cAMP
B. Phosphorylation
C. Dimerization
D. Lowering of cAMP concentration
E. Binding to GRE
B
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Refer to the figure above. Which of the following forms a monophyletic group?
A) A, B, C, D B) C and D C) D, E, and F D) E, F, and G
Answer the following statements true (T) or false (F)
1. In epistasis, two opposing genes are expressed equally. 2. In eukaryotes, DNA wraps around proteins known as histones inside the nucleus of the cell. 3. Telomeres grow in length with each round of DNA replication. 4. Prokaryotic mRNA is more stable than eukaryotic mRNA because its maturation takes fewer steps. 5. Each domain of organisms has its own unique codons to code for protein synthesis.
In a commensal relationship between a phoretic species and its "host", the phoretic species is not affected.
Answer the following statement true (T) or false (F)
The most selective antibacterial agents are those that interfere with bacterial cell wall synthesis. This is because
A. bacterial cell wall synthesis is easily inhibited whereas eukaryotic cell wall synthesis is more resistant to the actions of the drugs. B. eukaryotic cells inactivate the drugs before they can do any damage. C. bacterial cell walls have a unique structure not found in eukaryotic host cells. D. eukaryotic cells do not take up the drugs.