Element: Simplest form of matter to have unique chemical properties. Atom: The smallest particles with unique chemical identities. Nucleus: Center of an atom (composed of protons and neutrons). Proton: Have a single positive charge (+1). Neutron: Have no charge. Electron: Tiny particles with a single negative charge and very low mass (-1)/determines chemical bonding properties of an atom. Atomic Number: Number of protons in the nucleus. Atomic Mass: Approximate number of protons and neutrons
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DNA REPLICATION WHAT IS DNA? DNA is a molecule that has a repeating chain of identical five-carbon sugars (polymers) linked together from head to tail. It is composed of four ring shaped organic bases (nucleotides) which are Adenine (A)‚ Guanine (G)‚ Cytosine (C) and Thymine (T). It has a double helix shape and contains the sugar component deoxyribose. THE PROCESS OF DNA REPLICATION How DNA replicates is quite a simple process. First‚ a DNA molecule is "unzipped". In other words‚ it
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Chakrabarti O‚ Feigenbaum L and Hegde R: Reduced Translocation of Nascent Prion Protein During ER Stress Contributes to Neurodegeneration Dev Cell. September; 15(3): 359–370 (2008). Wang HQ and Takahashi R: Expanding insights on the involvement of endoplasmic reticulum stress in Parkinson ’s disease. Antioxid Redox Signal. May; 9(5):553-61 (2007). Warrington A and Rodriguez M: Method of identifying natural antibodies for remyelination. J Clin Immunol. May; 30 Suppl 1:S50-5 (2010).
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CHAPT 1 - The scientific method allows the solving of problems and answering of questions. Observations Proposing ideas Testing the ideas Discarding or modifying ideas based on results Hypothesis: proposed explanation for a set of observations Hypotheses needs to be: Testable – it must be possible to examine the hypothesis through observations Falsifiable – it must be able to potentially be proven false Both logical and creative influences are used to develop a hypothesis A hypothesis
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The Earth has a plethora of organisms that live and reproduce all throughout its surface. Depending on what kind of organism‚ they go through some processes that others life-forms do not need to do. However‚ the molecules DNA and RNA‚ which are found in all living creatures‚ work together in a certain process that is crucial to existence: the formation of proteins. Although all species differ from each other in various ways‚ the processes by which proteins are synthesized are the same in all.
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M4A1 Midterm Essay BIO110 Excelsior College 1. You are the biologist in a group of scientists who have traveled to a distant star system and landed on a planet. You see an astounding array of shapes and forms. You have three days to take samples of living things before returning to earth. How do you decide what is alive? If three days is all I have to take samples of living things‚ then it would be very hard to determine what is truly alive‚ as the time restriction only allows for certain
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BIOLOGY CH 10 GENETICS WORKSHEETS - ANSWERS Section 10-1 VOCABULARY REVIEW 1. A purine is a nitrogen-containing base with two rings of carbon and nitrogen atoms. Examples may include adenine or guanine. 2. A pyrimidine is a nitrogen-containing base with one ring of carbon and nitrogen atoms. Examples may include cytosine or thymine. 3. A complementary base-pair is a pair of nitrogencontaining bases connected to each other by hydrogen bonds. Examples may include adeninethymine and cytosine-guanine
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Casandra De Amicis Biology Review #1 1. The basic unit of structure and function for life is atoms 2. The levels of organization for an organism are: atoms‚ molecules‚ cell‚ tissue‚ organ‚ organ system‚ organisms‚ population‚ community‚ ecosystems‚ and biosphere 3. The characteristics of living organisms are; a. Life is organized b. Life uses materials and energy c. Life reproduces d. Life is homeostatic 4. The major driving force behind evolution is; natural selection (brings about adaptation
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The Sense of Taste Taste is the ability to respond to dissolved molecules and ions called tastants. Humans detect taste with taste receptor cells. These are clustered in taste buds. Each taste bud has a pore that opens out to the surface of the tongue enabling molecules and ions taken into the mouth to reach the receptor cells inside. There are five primary taste sensations: • salty • sour • sweet • bitter • umami Properties of the taste system. • A single taste bud contains 50–100 taste
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similarities and differences between the two different cells. To begin with‚ both animal and plant cells are eukaryotic cells. This means that both cells have the same internal features‚ such as a cell membrane‚ a nucleus‚ mitochondria‚ and an endoplasmic reticulum. Both animal and plant cells contain a nucleus‚ as well as more than one chromosome. They are usually multicellular‚ and contain a true membrane bound nucleus. Plant and animal cells have all these features because they are both eukaryotic
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