Amanda is a microbiologist who studies the pathogenic bacteria Streptococcus pyogenes. In what ways are they (Amanda and the bacteria) similar?
A. Both have linear chromosomes.
B. Both have cell walls.
C. Both have mitochondria for ATP production.
D. Both are capable of sexual reproduction.
E. Both obtain carbon from consuming organic molecules.
Answer: E
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Which of the following uses ssDNA as the genome?
A. Herpesvirus B. Poliovirus C. Poxvirus D. Parvovirus
A phosphatase is capable of dephosphorylating molecules. What would this enzyme do in a signal transduction pathway that used a kinase cascade?
A. Turn off the cascade. B. Activate the cascade. C. Phosphorylate a receptor. D. Serve as a ligand for the receptor. E. Phosphorylate a transcription factor.
Drosophila is a unique candidate for genetic engineering because it is the one prokaryote about which we have a great deal of genetic information
Indicate whether the statement is true or false
Cells in the body that have been infected by a virus or bacteria are specifically killed by:
A) cytotoxic B cells. B) regulatory T cells. C) cytotoxic T cells. D) dendritic cells. E) mast cells.