Venus flytraps live in low pH soils that have poor nutrition. They have adapted specialized leaves and nectars to attract and trap their food of choice. Which of the following describes Venus flytraps?
a. saprophyte
b. epiphyte
c. insectivore
d. parasite
c. insectivore
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Avidin binds biotin with a Kd of ~10?15 mol/L. A protein of interest can be covalently linked to biotin and subsequently isolated by incubating with beads coated with avidin
If the concentration of biotinylated protein is 10-8 M at the beginning of the assay and the beads provided an excess of avidin-binding sites, then one could expect the beads to bind: A. a small fraction of the protein in the sample. B. approximately half the protein in the sample. C. almost all of the protein in the sample. D. 10–15 mol of protein per 1 mL of sample. E. This cannot be predicted.
What is a defective phage?
A. A virus that has lost some of its genetic material, and therefore cannot infect a new target cell B. A virus that has lost some of its genetic material, and therefore cannot replicate within a new target cell C. A virus that lacks the ability to replicate independently of its host cell D. A virus that cannot attach to its host cell
The production of natural carbon dioxide by yeasts after a wine is bottled results in ________.
A. sweet wine B. brandy C. champagne D. dry wine
The coelacanth gave rise to the ____
a. ray-finned fish b. chimaeras c. tetrapods d. dogfish e. lungfish.