The first multicellular terrestrial organisms were
A) plants. B) amphibians. C) insects. D) fungi. E) reptiles.
A
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Explain the ethical concerns with germ-line gene therapy in humans
What will be an ideal response?
Pairing of homologues and crossing over occur during ____
a. anaphase I b. metaphase II c. prophase I d. prophase II e. telophase II
Which of the following is true regarding single pass transmembrane proteins?
A. They traverse the membrane more than once and can only be extracted by using detergents B. Have 2-20 hydrophobic segments C. Protrude from only one side of the membrane D. Are comprised of 90% beta-sheet structures E. Contain only one hydrophobic segment
Fimbriae, which is a virulence factor causes which of the following consequences?
A. Phagocytic escape B. Activation of cytokine production C. Attachment to host cell D. Invasion of host tissues E. Activation of adenylate cyclase