BIOL 112 Study Guide - Quiz Guide: Genetic Code, Isoprene, Glycerol

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turquoisegnu128

24 Oct 2018

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BIOL 112 Full Course Notes

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Also, if i ask for one reason then provide only one reason. #1 (2 marks) some people argue that viruses are alive, some argue that they are not. However, everyone agrees that viruses are not considered cells. Provide two reasons as to why this is so. You need to have two of the following points they need to be distinct points, not just a variationviruses do not possess the following structures that all cells possess, as a result they lack many of the criteria of life. # 2 (2 marks) of the three domains of life, which two are prokaryotic: bacteria, archaea (2 marks) a cell requires more nitrogen than phosphorus. #3 component of ___________proteins/amino acids_____and these molecules constitute about 50% of the cell"s dry weight. Nitrogen and phosphorus are needed in greater amounts than trace elements because trace elements are usually components of ________enzymes/coenzymes________that only facilitate metabolic reactionsnote: trace elements and micronutrients are essentially the same thing.

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Directions: Write a review on the fad diet of your choice.

1. Use the Internet to search for "fad diets." Typing "fad diets" into a search engine will only provide you with sites that comment on fad diets. You will need to find the names of fad diets and then search for those individually.
2. Review the websites you find and pick one that you consider the most interesting with enough information available to review the diet.
3. Record facts, quotations, and other information that will be useful. Utilize books, articles, and reputable online resources.
4. Write a two-page double-spaced review of the diet that outlines the name of the diet, the purpose of it, the health claims it is making, how much weight a person will lose, and any special recommendations it makes.
5. At the end of the report, write a paragraph outlining if you would recommend this diet, why or why not. Also, review what likelihood someone will succeed on this diet.

yellowcattle957

indicate whether you think the statements are true or false, and explain your reasoning. In each of your answers, provide 1-2 specific examples that support your position. (Each of your four answers is worth five points):

A) Memory cells require fewer distinct signals to be activated than naiÌve cells require.

B) Both B cells and T cells undergo âclonal selectionâ after they are activated by antigen.

C) A B cell is only able to present antigen to a T cell that includes the epitope to which the

B cellâs receptor bound.

D) T cells can recognize peptide antigens in the context of MHC I and MHC II regardless of

whether they are Thelper or Tcytotoxic cells.

E) B cells and T cells can both still make productive antigen receptors via V(D)J

recombination even if no P-nucleotides are introduced during the process.

F) Allelic exclusion takes place when a naiÌve T or B cell encounters its specific non-self antigen for the first time and determines whether or not to become activated.

G) B cells have more chances to make a productively rearranged antigen receptor than T cells do.

H) A majority of immature T cells developing in the thymus will survive both positive and negative selection.

I) The reason why T cells are the only type of white blood cell that requires maturation in a specialized organ outside the bone marrow is because they are the only ones that must have antigen processed and presented to them before they can be activated.

violetbear615

Can someone edit any grammar issues or edit any sentence structure to make my ideas flow better. It is a short paragraph (biology) about the theories of why scrotum are placed externally (interesting article)

The idea of the scrotum being placed externally seems odd at first because the human body usually protects its organs such as the ribcage surrounding the heart or the skull surrounding the brain. On the other hand, female ovaries do not emerge outside of the body, preventing them reproductive disadvantage, so why is it different for testicles? Before reading this article, my hypothesis at first would majority be that it just served as a reproductive organ. Also I suppose it would make more sense to have them inside the body for protection and just make them cope with the extra heat, but evolution isnât able to plan ahead in this way. According to Drew, he states that the reason behind external testicles because the temperature of the testicles must be lower than the rest of the body temperature for optimal sperm production and storage. I do agree that this justification because it turns out that human testicles display some rather elaborate yet subtle temperature-regulating features that have gone largely unnoticed by doctors, researchers and laymen alike. According to Gallup, he advanced the hypothesis that descended scrotal testicles in humans and many other mammals evolved to provide a situation specific means of activating sperm. As a result of consistent temperature differences between the male and female reproductive tracts, we propose that the rise to body temperature that accompanies insemination into the vagina serves as one of several triggers for the activation of sperm (2009). This makes sense in way because internal body temperature would cause sperms to die and with having cooler temperature, this aids reproduction process.

amaranthhare726

BIOL 112 Study Guide - Quiz Guide: Genetic Code, Isoprene, Glycerol

BIOL 112 Full Course Notes

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