Define the term symbiosis specifically as it applies in a biological context. Compare and contrast parasitism, mutualism, and commensalism using a specific example of each type of symbiosis. For all three examples, explain how each organism in the relationship is affected.

QUESTION 4

1. Discuss the sanctity of life versus the quality of life debate as presented by Peter Singer. Your answer should demonstrate a solid awareness of the information presented in the text. Be as clear and specific as you can.

1)The histone proteins of nucelosomes are often abnormally modified in cancer cells, leading to _____. a. an alteration in chromatin structure b. an alteration in levels of transcription c. double-stranded breaks in DNA d. All of the above e. Both a and b

2)

A DNA strand contains the sequence TCGGATGCACCT. A mutation happened that results in the sequence TCCGGATGCACCT. What type of mutation does this change represent?

3)

Chromosomal rearrangements might position a gene near heterochromatin. The gene's transcription

Question 4 Part A: If you were to extract your own DNA would you expect it to look different from your plant DNA extract? Why or why not?

Nucleotides of DNA are joined by a ____________ to form polynucleotides whereas amino acids are joined by a ______________ to form polypeptides.

Group of answer choices

Phosphodiester linkage / hydrogen bond

Phosphodiester linkage / glycosidic bond

Peptide bond/ phosphodiester linkage

Hydrogen bond/ peptide bond

Phosphodiester linkage/ peptide bond

The adaptive immune system has two major effector arms: humoral and cell-mediated. Discuss the need for such separate systems from the standpoint of common pathogenic organisms and substances. What might you think are the "weak links" in these systems?

1. How have some disease-producing organisms exploited these?

2. Does this help explain why it is extremely difficult to generate effective vaccines for some organisms? Give an example and explain your reasoning.

Write an introduction about cutaneous mycoses.

Electrons bound by NADH from glycolysis, the CAC, and the Pyruvate Dehydrogenase Complex are transferred to the Electron Transport Complex (Complex 1, Complex 2, Complex 3 and Complex 4) a series of 4 protein complexes. What is the order the electrons will travel from protein complex to protein complex?

How is the coronavirus pandemic affecting wildlife? With fewer cars on the roads, and with parks and wildlife areas closed to the public for several weeks, the Stay-at-Home Order (shelter in place) likely affected some animal populations in urban areas.

describe two examples of how animals have been affected.
Make sure to include the type of animal affected, and how they are affected. If you have directly witnessed affected wildlife, you may use that as one example.

Explain what evolutionary adaptations, in general, exist in hyperthermophilic bacteria in terms of their cell membranes and cellular proteins. Your answer should explain how such adaptations provide advantages in terms of protein and membrane function at extremely high temperatures.

1. If you were to have a starch-rich diet, which plants and their parts, would you use? Give 3 examples, and justify each.
2. Name 3 plants belonging to the mustard family [Brassicaceae]. Mention how we use them.
3. Name 3 plants belonging to the carrot family [Apiaceae]. Mention how we use them.
4. Besides peppers, which other important crop comes from the nightshade family [Solanaceae}? Mention 3 facts about it.

2. You are given an unlabelled water sample with the below MPN tube results presented as volume of raw sample followed by number of positive tubes out of 5 total tubes incubated. 1 mL : 2/5 positive, 0.1 mL : 1/5 positive, 0.01 mL : 0/5 positive

   1. Report the estimated titre and 95% confidence interval.

   2. Indicate a potential source based on the magnitude of coliform contamination and

      provide your reasoning.

in your own words:

1. What is an ostomy?

2. Why would someone require an ostomy?

3. Where can an ostomy be located?

4. What is the nursing role in caring for patients with ostomies?