Through a microscope, paired chromosomes are visible within the nuclei of an unidentified cell sample. Which statement about these cells is true?
a. They cells have been damaged by prolonged dehydration and are beginning to die.
b. The cells must be prokaryotes because eukaryotic nuclei are opaque to visible light.
c. The cells were preparing to undergo cell division when the slide was prepared.
d. The cells were collected from a patient suffering from acute celiac disease.
c. The cells were preparing to undergo cell division when the slide was prepared.
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You may have heard that monarch butterflies (and their caterpillars) are "poisonous" to many predators. What makes these insects so toxic?
A. Monarch caterpillars produce cardenolides in their digestive tracts. B. Monarch caterpillars use cardenolides from milkweed to synthesize toxins. C. Monarch caterpillars ingest milkweed latex which "chokes" their predators. D. Monarch caterpillars store cardenolides from milkweeds. E. Monarch caterpillars secrete latex from their bodies.
Phagocytosis is a form of ____
a. diffusion b. endocytosis c. exocytosis d. osmosis e. facilitated diffusion
What are the two different phases of VMH syndrome?
What will be an ideal response?
One method used to prevent disulfide bond interference with protein sequencing procedures is:
A) cleaving proteins with proteases that specifically recognize disulfide bonds. B) protecting the disulfide bridge against spontaneous reduction to cysteinyl sulfhydryl groups. C) reducing disulfide bridges and preventing their re-formation by further modifying the —SH groups. D) removing cystines from protein sequences by proteolytic cleavage. E) sequencing proteins that do not contain cysteinyl residues.