Animals of the phylum ____ are likely to have an exoskeleton.
A. Mollusca
B. Arthropoda
C. Nematoda
D. Chordata
E. Annelida
Answer: B
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Which of the following is not a benefit or advantage of using mass spectrophotometry?
A. Proteins can be sequenced by mass spectrophotometry. B. The mass of a protein can be determined and lead to its identification. C. Changes in mass due to binding of cofactors, bound metal ions, and covalent modifications can be measured. D. If protein is enzyme, sequence information includes three-dimensional structure of active site. E. Fragments of the protein may permit unambiguous association with its gene.
A prokaryote that differs from most other bacteria with respect to its very small size and obligates intracellular parasitism is:
a. Rickettsia. b. Bartonella. c. Calymmatobacterium. d. Coxiella.
Which blood type is the universal recipient?
a. A b. B c. AB d. O e. none of these
Some evidence that algae are the closest relative to plants is that they both:
a. Have chloroplasts b. Contain chlorophyll a c. Have cellulose rich cell walls d. Use starch as a nutrient reserve e. All are correct