Some relatively mild illnesses, like the common cold, return to infect you again and again. For a while, right after you recover from a cold, you are immune. But that doesn’t last; after some weeks or months, depending on the illness, you become susceptible again. This means there is now a flow from the recovered population to the susceptible. These exercises ask you to modify the basic S-I-R model to describe an illness where immunity is temporary.

c. We saw in the text that the model for an illness that confers permanent immunity has a threshold value for S in the sense that when S is above the threshold, I increases, but when it is below, I decreases. Does this model have the same feature? If so, what is the threshold value?

Choose one of the four forms of cell signaling and describe it in detail using examples.   Relate the development of such systems with the evolution of multicellularity and apply this to an explanation of why this would be advantageous in complex organisms.

Discuss similarities and differences between C3, C4, and CAM plants using examples of each. How does the environment each type is found in relate to their respective differences in photosynthesis?

How is DNA protected from spontaneous and environmental damage, and how is damage, once inflicted, reversed?

During which stage of the viral life cycle would viral capsid proteins be manufactured?

A. Assembly

B. Biosynthesis

C. Release

D. Entry

6) What are some density dependent and some density independent factors that could together determine the carrying capacity of a species? Be sure in your answer you make it clear which factors are density dependent and which are density independent.

_______________________ are stripped from the intermediate organic molecules of the Krebs Cycle.

carbon and hydrogen atoms

oxygen and electrons

H+ and electrons

ATP and NAD

In aerobic respiration NADH and FADH2 are oxidized back into NAD⁺ and FAD by

glycolysis.

the Krebs Cycle.

the electron transport chain.

fermentation.

Two ATP are used to add two phosphate groups to glucose in the

Krebs Cycle.

electron transport chain.

glycolysis.

bridge step.

ATP and ________________ is/are the product(s) from the Krebs Cycle.

NADH

FADH2 and NADH

NADH and carbon dioxide

NADH, FADH2 and carbon dioxide

NADH, FADH2, carbon dioxide and oxygen

As a toxicologist, you are given the assignment of determining whether a new chemical is capable of producing dermal sensitization. Explain how you would test for this. Include in your explanation the model/test system you would use and a brief description of how the test is run and interpreted.

Hint: You will need to use resources outside the textbook to answer this. There are many standardized protocols that will be easy to find. Please include in your answer why you picked the test(s) you selected.

Create your own 2020 Health Objectives for older people.

What is this Corona disease? Where is disease prevalent? What organisms does this disease infect and how is it transmitted from host to host? Details.

I have this question, and I have to answer it as essay (for my project). Can you help me. Please can you type the answer. I don't understand the writing hand. Sometime.

Thanks

Remember units and how much water is added to make the final volume. Show your work (c1v1=c2v2)

Please Build the genetic code of the name CRICK

BIOCHEMISTRY ASSIGNMENT

UNIT TITLE: BHND 222/CHTU 125/BEH 125

1. 1. Name all the enzymes and co-enzymes involved in digestion of carbohydrates, Lipids and proteins in the human body from the mouth to intestines and up to absorption to the liver
2. Describe the metabolic pathways for glucose, amino acids and fatty acids and glycerol in the Liver
3. a) Draw the Animal cell and its detailed organelles and describe the structure of the cell membrane b) Explain the transport mechanisms across the cell membrane.
4. Explain the processes of lipogenesis and Gluconeogenesis
5. Write about glycogen storage disease
6. List various types of eicosanoids and explain their importance in the body.
7. Discuss four diseases associated with nucleic acids’ impairments.
8. Discuss the formation and transit of high density lipoproteins and low density lipo proteins
9. Discuss Nucleic Acid drawings, components and structures.
10. Describe the following cycles in the human body
11. a) Pyruvate cycle b) Cori-cycle     c) urea cycle    d) Krebs cycle      e) amino acid synthesis