Lipoprotein

Animal products containing solid fats also contain dietary cholesterol. Saturated fats and trans fats tend to raise "bad" (LDL) cholesterol levels in the blood. Explain why LDL is considered a "bad" cholesterol. Explain the consequences of excess cholesterol in the bloodstream? Why is HDL consider...

Collagen Role and Structure

In your paper, address the following points: Explain why Glycine, which appears quite frequently, is important to the helical structure of collagen? Compare the structure of collagen to the twisted fibers in a rope. Explain how mutations in cases of Osteogenesis imperfecta result in more brittl...

Cellular respiration and Biomolecular

Choose one example of inhibition that is found in either glycolysis or the citric acid cycle.Explain if your example is a process of feedback inhibition or allosteric activation. After evaluating the necessary functions in cellular respiration, you will need to employ a little imagination to suggest...

Sugar Substitutes, their Benefits and Concerns

Choose one sugar substitute and describe what makes this substance unique. Today artificial sweeteners and other sugar substitutes are found in a variety of food and beverages. Identify three food products that contain a sugar substitute. a. Explain why is it advantageous (to you the consumer and...

Saturated vs. Unsaturated Fats

Explain why different fats behave differently at room temperature. Why does olive oil remain liquid at room temperature and butter and shortening remain a solid? Describe trans fat. a. The food industry is always striving to provide new products. Some products are a great success and others have t...

Biochemistry unit 3

Over 10 varieties of the alcohol dehydrogenase molecule have been identified. All of them catalyze the same reaction. Hypothesize how these variations in the alcohol dehydrogenase molecule can explain why some individuals react differently to alcohol than others? Explain how more acetaldehyde is ab...

Essential, Non-Essential and Conditionally-Essential Amino Acids

Part 1 Explain what the term 'essential' means to you. Identify one essential amino acid and describe how it could be obtained in your diet? Phenylketonuria (PKU) is a genetic disease that is screened for in newborns. Kwashiorkor is described in your readings this unit as a form of malnutrition...

Biochemistry basics: Why is water important?

1. Why do you think you will benefit from a general knowledge of biochemistry? 2. Water, H2O, is a simple molecule. Briefly explain why you think water is so important to life? Do you think the water needs are different for an elephant compared to E. coli or humans? Explain. 3. The three most im...

Enzyme Calculations and Methane

You are investigating the biochemical origins of cow methane emissions (belches and farts, to be blunt) which contribute to global warming. Bacteria in the cow gut make methane and a key enzyme in the pathway is methyl-coenzyme M reductase. The turnover number of pure enzyme (mass 300 kDa) is 100...

Cotyledons Experiment

I need some help on the Induction of nitrate reductase by NO3- in radish seedling cotyledons: 20 pairs of cotyledons are incubated for 4 hours with different solutions, Solution A: K2SO4, MgSO4, Ca(H2PO4) Solution B: K2SO4, MgSO4, Ca(H2PO4), KNO3 Solution C: K2SO4, MgSO4, Ca(H2PO4), KNO3, cycl...

Fluorescence polarization

The solution is a description of the concept of applying fluorescence polarization to measure protein-peptide binding interactions.

Metabolic Rate and Gas Production

All living organisms must utilize energy to maintain themselves and to carry out life activities. The rate of energy utilization is known as the metabolic rate. Eukaryotic organisms used chemical energy to drive energy requiring life processes. We will measure metabolic rate in both an anaerobic an...

Enzyme Experiment and Analysis

Enzymes are proteins that function as biological catalyst. Enzymes increase the rate of a reaction without being consumed themselves by the reaction. Enzymes can speed up a chemical reaction by lowering the activation (EA ) barrier. (1) Enzymes speed up a chemical reaction and lower the activation b...

Understanding & Calculating Dilution Factors

For an upcoming experiment, an immunoassay (ELISA) protocol calls for a complicated series of dilution steps for your blood specimen. Calculate the final dilution factor after the following steps: Add 1 liter of blood to four liters of water, then take 1 ounce of that solution and add it to 9 ...

Converting units and accuracy/precision

Exercise 3: Conversion For each of the following, convert each value into the designated units. (please see word doc for chart info) 1. 46,756,790 mg = _______ kg 2. 5.6 hours = ________ seconds 3. 13.5 cm = ________ inches 4. 47 °C = _______ °F Exercise 4: Accuracy and Precision 1. ...

Scientific article summery

http://www.nejm.org/doi/full/10.1056/NEJMra1109345 1. In one paragraph provide a summary of the article. 2. In one paragraph provide your thoughts on the article. Do you think the author presented a good overview of the topic being discussed? Why or why not? Was there anything you would hav...

Gray squirrels and natural selection

Natural Selection 1. OVERPRODUCTION. In a species [organisms that can interbreed], more individuals are born than survive to reproduce. 2. VARIATION. There is variation among individuals in a population, much of which is genetic. 3. COMPETITION & SURVIVAL. Individuals best adapted to their ...

Zoology table

I need assistance with a biology project. I do not need an excellent grade for this project so minimum effort is needed. Please assist.

Toxicology in workplace air contaminants

An overview of the toxicity of the following workplace air contaminants: Nickel dust or fume (particulate) - Exposure - Applicable Occupational Exposure limits (OELs) - toxico-kinetics - toxico-dynamics Methyl ethyl ketone (MEK) (vapour) - Exposure - Applicable Occupational Expos...

Definition of Life from a Biological Perspective

Find any media piece (article, video, presentation, song, or other) related to scientific method and describe how it helped to better understand how the scientific method is used to create hypotheses and experiments. Find a media piece that recognizes the fundamental concepts of chemistry in biol...

Principles of Toxicology

1) Some theorists argue that there may be no clear threshold for effects such as carcinogenesis & mutation. What arguments do you think they might put forward in support of this? 2) It is important to understand the physiological means by which toxic agents cross cellular membranes & enter the ce...

Rosiglitazone and Assumptions of a Graph

Can you please explain how to read the graph attached? I don't know what the use of rosiglitazone is for. What are the assumptions that come from the graph? (Answer provided in less than 100 words.)

Myelin for action potential propagation.

Myelin is important for action potential propagation. Multiple sclerosis is an autoimmune disease where the myelin sheath surrounding CNS axons is progressively lost. How will this degradation affect the generation of action potentials?

Temperature Affects on Enzymes Actions

How does the temperature affect the actions of enzymes upon their substrates? Are there any other factors that could affect these actions on the substrates?

Cellular Respiration

1) State the key products of the Kreb's Cycle and how many of each there are starting from 1 glucose molecule. 2) Show how each stage of cellular respirtion contributes to the total of 38 ATP from 1 molecule of glucose. 3) State the input and output molecules of glycolysis and how many of each the...

Cellular Respiration Evidence

Respiration Procedures Procedure 1: 1. Mix ¼ tsp of yeast into 175 mL of warm (40-43 C) water in a 250 mL beaker. Stir until dissolved. 2. Label the big and small test tubes 1-5. 3. In a 250 mL beaker, mix the 1 gram packet of Equal with 100 mL of water. In another 250 mL, mix the 1 gram pa...

Glucose Oxidation

1. Carbohydrates, lipids, and proteins are important biomolecules. Describe the structures and properties of carbohydrates, lipids, and proteins including the different forms of these biomolecules that are present within the body. 2. The membrane of a cell is an important structure that isolates...

The energy in glucose is transformed into ATP

What energy transformations occur between glucose and ATP? The energy in glucose is transformed into the energy stored in the chemical bonds of ATP by the oxidation of glucose during three steps of (aerobic) cellular respiration: 1) Glycolysis, 2) The Kreb's Cycle(also called the Citric Acid Cycle o...

Endocrine and Nervous System: Neurotransmitters

Why have both an endocrine and a nervous system? Although we have not yet studied the endocrine system, you know enough about it to answer the question. Both systems use chemical messages (hormones or neurotransmitters) and they are often identical molecules. The endocrine system releases hormones i...