A destructive lesion of the gums, also known as acute necrotizing ulcerative gingivitis, that is caused by oral spirochetes and other bacteria is known as:
a. Vincent's disease.
b. primary syphilis.
c. chancres.
d. Weil syndrome.
A
Some treponemes such as Treponema vincentii, Treponema denticola, Treponema refringens, Treponema socranskii, and Treponema pectinovorum are normal inhabitants of the oral cavity. Acute necrotizing ulcerative gingivitis, also known as Vincent's disease, is a destructive lesion of the gums.
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As a forensic pathologist, you have just completed an autopsy of a poisoning victim. After a thorough examination, you conclude that the victim died of cyanide poisoning. You know that cyanide binds to the cytochrome oxidase complex, and therefore list the official cause of death as suffocation due to cyanide exposure. However, if you wanted to provide a more technical explanation as to the cause of death, which process was specifically inhibited directly by cyanide?
A. The reduction of NAD+ B. The oxidation of FADH2 C. All proton pumping into the intermembrane space D. The formation of water from oxygen E. ATP synthesis Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about cellular respiration and cytochrome oxidase? What other information is related to the question? Choose Answer Do you have all the information needed to determine which specific process is directly inhibited by cyanide? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
In order for DNA molecules to undergo
recombination, a. they must be from the same species. b. their strands must separate as in replication. c. they must be cut and spliced at specific nucleotide sequences. d. one of the two DNA strands must be degraded. e. they must first be transcribed.
Microorganisms contribute to the formation of soils
Indicate whether the statement is true or false
Eyes contain ____
A. chemoreceptors. B. mechanoreceptors. C. photoreceptors. D. nociceptors. E. thermoreceptors.