Which type of muscle tissue contains fibers that are uninucleated and nonstriated?

A. skeletal
B. cardiac
C. smooth


Answer: C. smooth

Biology & Microbiology

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Enterotoxins are ________.

A. proteins B. exotoxins C. toxins that target the intestines D. virulence factors E. All of the choices are correct.

Biology & Microbiology

DNA replication occurs in the ________ of the cell cycle

Fill in the blank(s) with correct word

Biology & Microbiology

How does the phenomenon of horizontal gene transfer muddle the concept of monophyletic groups?

A. Monophyletic groups are based on the concept that members of a particular group of species are related to one another at a particular taxonomic rank. However, a species that undergoes horizontal gene transfer no longer belongs to that taxon and the group becomes paraphyletic. B. Monophyletic groups are based on the concept that members of a particular group of species are related to one another at a particular taxonomic rank. An unrelated species that undergoes horizontal gene transfer can become more closely related to members of a different group, making that group polyphyletic. C. Monophyletic groups are based on the concept that a particular group of species descended from a common ancestor. When horizontal gene transfer occurs, not all of the genes in a species were inherited from the common ancestor. D. Monophyletic groups are based on the concept that a particular group of species descended from a common ancestor. When horizontal gene transfer occurs in the common ancestor, any species to which it gives rise can no longer be considered descendent species.

Biology & Microbiology

The Embden-Meyerhof pathway is very important in the catabolism of glucose and other sugars in the cell. The first step of this process is the conversion of glucose to glucose-6-phosphate. This can be carried out by a hexokinase enzyme (via substrate-level phosphorylation) or by ____

a) ABC transport b) group translocation c) ATP synthase d) ligase e) polymerase

Biology & Microbiology