Which of the following IS a characteristic of an isoenzyme?
A) More than one enzyme is regulated by the same mechanism.
B) The same reaction can be catalyzed by multiple enzyme variants.
C) Multiple binding sites on the same enzyme enable multiple regulation mechanisms.
D) More than one gene makes the same enzyme.
Answer: B
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Cytosine, uracil, and thymine are single-ringed nitrogen-containing organic bases called ____________________
Fill in the blank(s) with correct word
Which phylum includes organisms that have bilateral symmetry and protostome development?
a. Porifera b. Echinodermata c. Cnidaria d. Platyhelminthes e. Chordata
One of the symptoms of global warming is a decrease in the persistence of sea ice in the Arctic, which affects polar bears by:
a. increasing their access to salmon b. reducing the portion of the year that they can reach seals c. improving the chances of survival of their young d. increasing mercury contamination in their tissues and increasing their access to salmon e. increasing risk of stranding far from shore and reducing the portion of the year that they can reach seals
Methicillin is related to penicillin, which was isolated from the bread mold Penicillium. Based on this, which of the following can you conclude is different between S. aureus and Penicillium?
a. The composition of their plasma membrane b. Their type of genetic material c. The structure of their organelles d. The composition of their cell wall e. The enzymes in glycolysis