How are covalent bonds in the cell rapidly broken?
A.) by energetically molecular collisions with potassium ions
B.) by enzyme catalysis that is specific between protein and substrate
C.) by energetically molecular collisions with water molecules
D.) by the large electrical force across membranes
Ans: B.) by enzyme catalysis that is specific between protein and substrate
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Many bacteria are pathogenic because they carry large segments of DNA called ________ ________, which were acquired by horizontal gene transfer, and which carry genes responsible for virulence.
What will be an ideal response?
An Italian physician, ________, challenged the concept of spontaneous generation by demonstrating that maggots do not arise from decaying meat but rather from developing fly eggs.
Fill in the blank(s) with the appropriate word(s).
Consider a biochemical pathway with five steps that lead to the production of product Q. If there is an abundance of product Q, the most efficient way to slow down the entire pathway would be to regulate ________.
A. every enzyme in the pathway B. the last enzyme in the pathway C. the first enzyme in the pathway
About how much of the atmosphere is composed of nitrogen?
A) 23 percent B) 1 percent C) 78 percent D) 52 percent