To examine the hierarchy of signal sequence targeting in a cell, you construct a variety of proteins containing different combinations of signal sequences. Based on your extensive knowledge of protein targeting, predict the location of each of these fusion proteins listed below. Provide the logic for your predictions.

(A) ER signal sequence and NLS

(B) mitochondrial signal sequence and KDEL sequence

(C) matrix-targeting sequence and a stop-transfer sequence

Briefly describe the role of siRNA and miRNA and suggest why the structure of RNA could play a role in this process.

population Problems

A species of finches on the Galapagos Island has a geometric growth pattern. The island has 25 000 finches in the first year. In the same year, there are 5000 births and 3500 deaths. What is the geometric growth rate Calculate the population after 5 years A population of walruses on an island in the South Pacific Ocean shows continuous growth.

The carry capacity of the environment is 10 000 and r = 0.5. What is the rate of growth for populations of 100, 1000 and 2000 walruses.

The Metro Toronto Zoo has an endangered species called the Eastern cougar. A pair of cougars have a fecundity of 5 offspring per year where all offspring survive to reproductive age (2.5 per parent per generation). Explain the type of growth Calculate the number of cougars after 5 years and 9 years.

In the summer, the Ottawa University has many pigeons. A grade 12 biology student decided to estimate the population size. She noticed that when she fed the pigeons in the atrium of Morriset Library, the same amount always returned. She devised a way to tag them. The first week she tagged 55 pigeons by luring them and feeding them. The second week she recaptured 45 pigeons and of those only 8 had the original tag. Estimate the population size.

A group of biology students are assisting a researcher from the University of Toronto on a project. They are trying to determine the growth rate of frogs in a marsh near Owen Sound. There are 200 frogs in the first year. By the time the students are in grade 12, 40 frogs were born, 90 died and 5 frogs immigrated. Determine the growth rate Do you think that tracking the frogs for one year is sufficient for this researcher?

An eager graduate student at Carleton, counts geese in the marshes off the Ottawa river. In 2004, they counted 2500 geese. During the next year, 500 goslings hatched, 45 immigrated, 200 died and 30 emigrated. Determine the following: Population change in individuals, in % and per capita The expected size of the population after 2, 4 and 8 years, given unlimited resources The doubling time, where r = 0.1725 Assuming a carrying capacity of 4235 geese, when will the geese population reach carrying capacity under ideal conditions?

if possible i would appreciate an answer in a text form not handwritten. thank you

.Can salta marshes absorb our nutrients?

what is the diffrencebetween biomagnificaction and bioaccumulation?

Explain the concept of survivorship. What is Type I, Type II, and Type III survivorship? Give an example of each type and explain how survivorship relates to population change.

Give 3 types of population dispersion with an example of each.

Name and explain two factors that affect population growth rates.

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Explain the chemiosmotic theory of mitochondria. Explain what is meant by an electrochemical gradient and proton motive force.

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How would cellular respiration differ between eukaryotic and prokaryotic cells?

Describe the various changes that occur to pyruvate in pyruvate oxidation. State the reactions.

Give the overall chemical equation for pyruvate oxidation.

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Compare the number ATP made from lactic acid fermentation to that of cellular respiration. Explain how muscles cells recover from lactic acid. Explain the importance of β-oxidation and weight loss. Give the number of ATP made from the breakdown of a 12C fatty acid to that of one molecule of glucose.

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Explain the functions of NAD+ and FAD and the need for them in cellular respiration.

The cellular respiration of glucose yields less energy than the burning of glucose. What do you think happened to that excess energy in cellular respiration

What is the bond energy of glucose and how is it calculated?

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Sally is a 68-year-old woman who walks 3 times per week, and attends yoga class
2 times per week. She has read several nutrition articles suggesting that women older than 50 years of age take supplemental vitamin D, vitamin B12, choline, and thiamin. Sally asks for your advice in choosing the appropriate supplements.
Do you agree with the recommendations from the nutrition articles? If yes, please provide your suggestions for food sources and supplements of vitamin D, vitamin B12, choline, and thiamin. If you do not agree with the nutrition articles, please provide appropriate recommendations for Sally regarding vitamin intake.

Explain why a simple exergonic free energy diagram would not be sufficient for cellular respiration with the following equation: C6H12O6 + 6O2 → 6CO2 +6H2O + 36 ATP

Explain where the C in CO2 comes from when you exhale. Be specific.

Please, i would appreciate an answer in a text form not handwritten. thank you

. Tony is a 17-year-old basketball player. His coach recommended that Tony find a supplement to aid in his recovery from workouts. Tony found a product that contains 10 grams of protein, 40 grams of carbohydrate, 1,000 mg of vitamin C, and 30 milligrams of vitamin E per serving.
Did Tony find an appropriate supplement to aid in his post-workout recovery? If yes, how many servings should Tony consume after a workout? If not, what recommendations would you provide to Tony for an alternative supplement or food product?

Doug is a 56-year-old tri-athlete. A recent physical revealed that his blood levels of homocysteine were elevated. His doctor suggested improving his diet to lower his homocysteine levels. Doug schedules an appointment with you to learn more about the dietary changes required to lower his blood levels of homocysteine.
Adequate consumption of which vitamins may help Doug decrease his homocysteine levels? Name three foods or beverages that are rich sources of these vitamins.