What is a limitation of mass-spectrometry in proteomics?
a. Mass spectrometry requires access to a particle accelerator.
b. Mass spectrometry requires large quantities of protein for accurate results.
c. Variations in protein structure caused by disease can be difficult to identify.
d. Proteins are destroyed in the process, making results impossible to verify.
c. Variations in protein structure caused by disease can be difficult to identify.
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Which of the following is not true regarding Entamoeba histolytica?
A. Entamoeba histolytica cysts pass through the stomach unharmed. B. Entamoeba histolytica produces enzymes that degrade epithelial tissue. C. Entamoeba histolytica always remains in the intestinal tract during an infection. D. Entamoeba histolytica grazes on bacteria in the intestines.
You made your first batch (ever) of wine about 6 weeks ago. You used a new plastic garbage can, covered with plastic wrap over the top, for the process. Now you get a cup of it out of the container only to find no alcohol--just really bad juice. What went wrong?
A. The plastic of the container released chemicals that killed the yeasts. B. The yeasts were not under anaerobic conditions. C. You bought the wrong yeast species at the store. D. Your yeasts mutated into non-alcohol producing organisms.
Which process is absolutely necessary for sexual reproduction to occur in a life cycle, but is not necessarily required for organisms that only reproduce asexually?
a. prokaryotic fission b. mitosis c. meiosis d. cytokinesis e. karyokinesis
In birds and mammals, a vestige of the sinus venosus of the fish heart remains as the sinoatrial node, which serves as a(n)
A. pacemaker. B. inhibitory node. C. diastole detector. D. site of erythropoiesis. E. baroreceptor.