After attaching to a bacterial cell, a bacteriophage typically
A. injects protein into the cell.
B. extracts protein from the cell.
C. injects DNA into the cell.
D. extracts DNA from the cell.
E. transforms the cell into a virulent strain.
C. injects DNA into the cell.
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What was one of the pieces of evidence most critical to the discovery of DNA structure?
A. Its composition of four different nucleotides. B. The discovery of its semi-conservative mode of replication. C. An X-ray diffraction pattern suggesting a double helix shape. D. The backbone containing sugar-phosphate linkages. E. The hydrogen bonding between different nucleotides.
Vaccines using inactivated pathogens do not stimulate cell-mediated immunity as effectively as vaccines using attenuated pathogens.
Answer the following statement true (T) or false (F)
What does this figure suggest?
A) Larger patch size increases extinction risk. B) Larger number of patches increase extinction risk. C) Smaller patch size increases extinction risk. D) Smaller number of patches increase extinction risk.
The removal of electrons and/or hydrogen atoms from a substrate is called what?
a. phosphorylation b. an enzyme-substrate complex c. metabolism d. oxidation e. reduction