Which of the following enzymes protect microbes against toxic oxygen (O2) products?
A) Catalase
B) Permease
C) Hydrolase
D) All of the above
Ans: A) Catalase
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The word gymnosperm means ____
a. covered seed b. active sperm c. naked egg d. naked seed e. covered sperm
Classic experiments suggested that a floral stimulus, florigen, could move across a graft from an induced plant to a noninduced plant and trigger flowering
Recent evidence using Arabidopsis has recently shown that florigen is probably _____. A) a phytochrome molecule that is activated by red light B) a protein that is synthesized in leaves, travels to the shoot apical meristems, and initiates flowering C) a membrane signal that travels through the symplast from leaves to buds D) a second messenger that induces Ca++ ions to change membrane potential E) a transcription factor that controls the activation of florigen-specific genes
Your friend is having difficulty keeping track of the energy flow from glucose through glycolysis, the Krebs cycle and electron transport. Your best advice would be to
A. follow ATP production. B. follow the protons. C. follow NAD+ production. D. follow the electrons.
What would happen if a peptide hormone receptor was expressed in the nucleus like a steroid hormone receptor? What will be an ideal response?