A. In which scientific unit is the strength of a chemical bond usually expressed?
B. If 0.5 kilocalories of energy are required to break 6 × 1023 bonds of a particular type, what is the strength of this bond?
A. kilocalories per mole (or kilojoules per mole)
B. 0.5 kcal/mole
You might also like to view...
Body appendages as diverse as crab legs,
beetle legs, sea star arms, butterfly wings, fish fins, and mouse feet start out as a. clusters of cells in the limb buds. b. cerebral cells. c. cardiac cells. d. offshoots of the sperm cell. e. offshoots of the egg
Which of the following statements about DNA structure is true?
a. The nucleic acid strands in a DNA molecule are oriented antiparallel to each other. b. The arrangement of the sugar-phosphate groups determines the genetic code. c. Phosphodiester bonds form between the phosphate group of one nucleotide and the 5' carbon of the adjacent nucleotide. d. DNA is always synthesized in the 3' to 5' direction.
A lac repressor turns off the expression of the lac genes by
a. Binding to the promoter b. DNA polymerase c. Binding to the operator d. Binding to the lac genes
Which organism is a nitrogen fixing symbiont of legumes?
A. Rhizobium B. Nostoc C. Pseudomonas D. Azotobacter E. Nitrobacter