The fact that all matter is made up of tiny particles that are in constant motion is known as the
A. first law of thermodynamics.
B. energy motion theory.
C. kinetic molecular theory.
D. first law of solids.
C. kinetic molecular theory.
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The graph here shows the results of Jacob and Monod's first experiments with betagalactosidase and lactose in E. coli. If beta-galactosidase were unstable in the absence of lactose (one of the hypotheses they tested), what results would you expect to see?
A. the results shown in the graph B. an increase in beta-galactosidase after lactose is removed C. a decrease in beta-galactosidase after lactose is removed D. an initially high level of beta-galactosidase at the beginning of the experiment, with a steady decline over time E. None of these choices are correct.
The purpose of the synaptonemal complex is to
a. hold the homologous chromosomes tightly together. b. support homologous chromosomes as they undergo recombination. c. prevent chromosome fragments from floating free in the cytosol after DNA breakage for recombination. d. ensure that the process of crossing over is random. e. hold the homologous chromosomes tightly together, support homologous chromosomes as they undergo recombination, and prevent chromosome fragments from floating free in the cytosol after DNA breakage for recombination.
Answer the following questions true (T) or false (F)
1. All other levels of protein structure are dictated by the primary structure. 2. A nucleotide is a polymer of nucleic acids. 3. Every form of life is either a single cell or is composed of cells.
All of the following disrupt the cytoplasmic membrane except ____
A. Detergents B. Quaternary ammonium compounds C. High concentration phenols D. Iodine