As part of an exam, you are given a powder to analyze. When you perform various tests, you find that it contains a single chemical that changes the pH of neutral water to a pH of 6. You would conclude that the chemical is a
What will be an ideal response?
weak acid
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Which of the following represents the highest level of chromosome condensation?
A. Radial loop domain B. 30 nm fibers C. Double helix D. Nucleosome E. Heterochromatin
What is the function of protein kinase C (PKC) in gene regulation?
a. PKC triggers apoptosis in cells exhibiting malformed RNA molecules. b. PKC binds to NF-?B, inhibiting it from entering the nucleus for RNA transcription. c. PKC phosphorylates I?-B, preventing it from inhibiting RNA transcription. d. PKC is the transcription factor that initiates RNA transcription in the nucleus.
What is the function of endosperm?
a. food for animal pollinators in flowers that don’t have nectar b. food for the sprouting seedling c. food for developing pollen grains d. food for the growing pollen tube e. food for the developing fruit
All of the following are milestones in the evolution of plants EXCEPT
A. flower production. B. the development of vascular tissues to conduct water and solutes throughout the body of the plant. C. nourishment of a multicellular embryo within the body of the female plant. D. the switch to chlorophyll as the primary photosynthetic pigment. E. seed production.