In the light-independent reactions, _____
a. carbon dioxide is fixed d. CO2 accepts electrons
b. ATP forms e. ATP forms and sugars form
c. sugars form f. carbon dioxide is fixed and sugars form
E
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In E. coli, the adenine in the sequence GATC is methylated by the Dam enzyme. In the same cells a restriction endonuclease recognizes and cleaves dsDNA with GATC on either strand. Why does E. coli have these two enzymes?
A) The enzymes cut the E. coli genome into pieces that bind to viral particles and inhibit viral replication. B) The enzymes increase the rate of mutation and genome rearrangement, thus increasing the likelihood that E. coli cells will mutate and become resistant to viral infection. C) The enzymes encourage lysogeny because the cleavage sites are recognized by viral integrases. D) The enzymes protect E. coli from infection by preferentially degrading viral or other exogenous DNA that is not methylated.
The Henderson–Hasselbalch equation demonstrates the relationship between the pH of a buffer and the ratio of conjugate base to weak acid in that buffer. When [A-]:
A. is greater than [HA], the pH is lower than the pKa. B. is less than [HA], the pH is higher than the pKa. C. is equal to [HA], the pH is equal to the pKa. D. is greater than [HA], the pH is equal to the pKa. E. is less than [HA], the pH is equal to the pKa.
Each species occupies a certain ecological __________, characterized by its interactions with the physical and chemical features and the other species living in it.
Fill in the blank(s) with the appropriate word(s).
A muscle that is NOT consciously controlled and has a banded appearance would be described as _____.
Fill in the blank(s) with the appropriate word(s).