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Step 1 First Aid – Biochemistry

Chromatin structure Negatively charged DNA loops twice around histone octamer (2 each of the positively charged H2A, H2B, H3, and H4) to form nucleosome bead. H1 ties nucleosomes together in a string. (Think of “beads on a string”; H1 is the only histone that is not in the nucleosome core.) In mitosis, DNA condenses to form mitotic chromosomes.Heterochromatin Condensed, transcriptionally inactive (“H eteroC hromatin = H ighly C ondensed.”)Euchromatin Less condensed, transcriptionally active (Eu = true, “truly transcribed”)Purines A, G 2 Rings (“PUR e A s G old = PUR ines”)Pyrimidines C, T, U 1 ri...

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Biochemistry Case Studies Essay Sample

Biochemistry Case Studies Essay Sample Introduction The two case studies given both involve in the processes of making energy that the body needs to maintain and sustain life. Each case is a different diagnosis but they both have some involvement in the production of ATP and other products when creating energy. If someone has an issue with the production of energy it is hard to maintain life in the body. The body has many different enzymes that are needed to reacts with others that then create what we need in the body. Everything has their own special role and when that certain enzyme or thing is missing it affects many other things in the body. In case study one; the patient is diagnosed with hereditary fructose intolerance with many symptoms including: loss of ap

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Introduction to Biochemistry Essay Sample

Introduction to Biochemistry Essay Sample Mg2+ has 10 electrons. A magnesium atom has 12 electrons with 2 of the 12 being valence electrons. Therefore the atom will lose the valence electrons which are located on the outermost shell to stabilize itself (outermost shell) as atoms tend to do what it easiest. Since magnesium lost 2 electrons it becomes positive as it is giving away electrons to stabilize other atoms. Hence magnesium then becomes Mg2+ because it lost 2 of the 12 electrons. Given that the half-life of the radioisotope Carbon -14 is 5730 years. How useful do you think the isotope would be for dating bones that are over a million years? (2 marks) Living plants and animals incorporate Carbon -1 into their tissues through the nutrients they consume and the

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The Biochemistry of Snake Venom Essay Sample

The Biochemistry of Snake Venom Essay Sample Snake venom is the poison fluid normally secreted by venomous snakes when biting. It is produced in the glands, and injected by the fangs. Snake venom is used to immobilize and/or kill prey, and used secondarily in defence. It is a clear, viscous fluid of amber or straw colour. There are two main types of venom produced by snakes, containing primarily either: *Neurotoxins – these attack the nervous system. *Hemotoxins – these attack the circulatory system. While most snakes’ venom contains primarily either one or the other, there are some snakes which have a combination of both in their venom. The snake’s poison is a combination of biologically active agents: ferments or enzymes as proteases and h

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MDMA: Biochemistry and Medical Indications

MDMA: Biochemistry and Medical Indications Essay Sample Introduction.  MDMA (3,4-methylenedioxy-N-methylamphetamine), known by the street names Ecstasy, E, X, or XTC [1] is a semisynthetic entactogen of the phenethylamine family.  MDMA is a ring substituted amphetamine derivative [2] structurally related to the hallucinogens and the stimulants, whose primary effect is the stimulation of secretion as well as inhibition of re-uptake of large amounts of serotonin, dopamine and norepinephrine in the brain [3-8].  An average dose is around 100-150 milligrams is eaten, the physical effects manifest about 45 minutes after ingestion and last about 8 hours. Snorting, smoking or injecting it produce much more rapid effects. Mental effects trail off over a period of 1-2 days.

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Why I am Interested in Biochemistry Major

Since childhood, pursuing Biochemistry major has always been my passion and strength.  I am hence confident that this is the choice that would fulfill my dream. Since I was young, science-related subjects have always been interesting to me, specifically the chemistry side of biology and the biology element in chemistry as I can apply it in real life situation. I was fascinated by simple molecules like water molecule playing its role as an organic solvent, a temperature regulator, and reactant molecule. I enjoy the fact that biochemistry uses techniques and principles of chemistry to bring out biological processes in living organisms. Studying the subject will enhance my desire and interest to succeed in my dream.My passion for exploring more about Biochemistry drove me to work a...

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