Animal Studies and School Project Ideas

Animal Studies and School Project Ideas Animal projects and studies are important to understanding various biological processes in animals and even humans. Scientists study animals in order to learn ways to improve animal health for farm production, wildlife preservation, and human companionship. They also study animals to discover new methods to improve human health. Animal studies give us a better understanding of disease development and prevention, as well as standards for normal and abnormal behavior. The following animal project ideas introduce areas of animal studies that can be explored through experimentation. Since some science fairs may prohibit projects that involve animals, so be sure to get permission from your instructor before beginning any animal-based science project. Amphibian and Fish Project Ideas Does temperature affect tadpole growth?Do water pH levels affect tadpole growth?Does water temperature affect amphibian respiration?Does magnetism affect limb regeneration in newts?Does water temperature affect fish color?Does the size of a population of fish affect growth?Does music affect fish activity?Does the amount of light affect fish activity? Bird Project Ideas Which types of plants attract hummingbirds?What factors increase egg-laying in birds?Do different bird species prefer a particular color of bird seed?Do certain bird species prefer to eat in a group or alone?Do certain bird species prefer one type of habitat over another? Insect Project Ideas How does temperature affect the growth of butterflies? How does light affect ants?Do different colors attract or repel insects?How does pollution affect insects?How do insects adapt to pesticides?Do magnetic fields affect insects?Does soil acidity affect insects?Does color affect insect-eating habits?Does light or heat attract insects to lamps at night?Do insects behave differently in a larger population as opposed to a smaller population?What factors cause crickets to chirp more often?What substances do mosquitoes find attractive or repellent? Mammal Project Ideas Does light variation alter animal sleep habits?Do cats or dogs have better night vision?Does music affect an animals mood?Do bird sounds affect cat behavior?Which animal sense has the greatest effect on short-term memory?Does animal saliva have antimicrobial properties?Does colored water affect animal drinking habits? Animal Information and Resources For additional information about animals, see: 10 Fascinating Animal Facts: Discover several wondrous and fascinating facts about animalsTen Amazing Bioluminescent Organisms: Some organisms such as jellyfish have the ability to glow. The light emitted is due to a chemical reactionWhy Some Animals Play Dead: When faced with danger, some animals go into a catatonic state and appear to be dead to the world.Top 7 Bugs That Feed on Humans: There are a number of bugs that feed on humans. These bugs are resilient, gaining immunity to insecticides, and out for your blood.Common Animal Questions and Answers: Why do zebras have stripes? Why do some tigers have white coats? Find answers to these and other commonly asked questions about animals.The Worlds Fastest Animals: What are the fastest animals on the planet? These swift animals reach amazing speeds on land, in the air, and in the ocean. Science Experiments and Models Performing science experiments and constructing models are fun and exciting ways to learn about science. Try making a model of the lungs or a DNA model using candy. You can also discover how to extract DNA from a banana or get ideas on how to use plants in experiments.

The Difference Between Purines and Pyrimidines

The Difference Between Purines and Pyrimidines Purines and pyrimidines are two types of aromatic heterocyclic organic compounds. In other words, they are ring structures (aromatic) that contain nitrogen as well as carbon in the rings (heterocyclic). Both purines and pyrimidines are similar to the chemical structure of the organic molecule pyridine (C5H5N). Pyridine, in turn, is related to benzene (C6H6), except one of the carbon atoms is replaced by a nitrogen atom. Purines and pyrimidines are important molecules in organic chemistry and biochemistry because they are the basis for other molecules (e.g., caffeine, theobromine, theophylline, thiamine) and because they are key components of the nucleic acids dexoyribonucleic acid (DNA) and ribonucleic acid (RNA). Pyrimidines A pyrimidine is an organic ring consisting of six atoms: 4 carbon atoms and 2 nitrogen atoms. The nitrogen atoms are placed in the 1 and 3 positions around the ring. Atoms or groups attached to this ring distinguish pyrimidines, which include cytosine, thymine, uracil, thiamine (vitamin B1), uric acid, and barbituates. Pyrimidines function in DNA and RNA, cell signaling, energy storage (as phosphates),  enzyme regulation, and to make protein and starch. Purines A purine contains a pyrimidine ring fused with an imidazole ring (a five-member ring with two non-adjacent nitrogen atoms). This two-ringed structure has nine atoms forming the ring: 5 carbon atoms and 4 nitrogen atoms. Different purines are distinguished by the atoms or functional groups attached to the rings. Purines are the most widely occurring heterocyclic molecules that contain nitrogen. They are abundant in meat, fish, beans, peas, and grains. Examples of purines include caffeine, xanthine, hypoxanthine, uric acid, theobromine, and the nitrogenous bases adenine and guanine. Purines serve much the same function as pyrimidines in organisms. They are part of DNA and RNA, cell signaling, energy storage, and enzyme regulation. The molecules are used to make starch and proteins. Bonding Between Purines and Pyrimidines While purines and pyrimidines include molecules that are active on their own (as in drugs and vitamins), they also form hydrogen bonds between each other to link the two strands of the DNA double helix and to form complementary molecules between DNA and RNA. In DNA, the purine adenine bonds to the pyrimidine thymine and the purine guanine bonds to the pyrimidine cytosine. In RNA, adenine bonds to uracil and guanine still bonds with cytosine. Approximately equal amounts of purines and pyrimidines are required to form either DNA or RNA. Its worth noting there are exceptions to the classic Watson-Crick base pairs. In both DNA and RNA, other configurations occur, most often involving methylated pyrimidines. These are called wobble pairings. Comparing and Contrasting Purines and Pyrimidines The purines and pyrimidines both consist of heterocyclic rings. Together, the two sets of compounds make up the nitrogenous bases. Yet, there are distinct differences between the molecules. Obviously, because purines consist of two rings rather than one, they have a higher molecular weight. The ring structure also affects the melting points and solubility  of the purified compounds. The human body synthesizes (anabolism) and breaks down (catabolism) the molecules differently. The end product of purine catabolism is uric acid, while the end products of pyrimidine catabolism are ammonia and carbon dioxide. The body does not make the two molecules in the same location, either. Purines are synthesized primarily in the liver, while a variety of tissues make pyrimidines. Here is a summary of the essential facts about purines and pyrimidines: Purine Pyrimidine Structure Double ring (one is a pyrimidine) Single ring Chemical Formula C5H4N4 C4H4N2 Nitrogenous Bases Adenine, guanine Cytosine, uracil, thymine Uses DNA, RNA, vitamins, drugs (e.g., barbituates), energy storage, protein and starch synthesis, cell signaling, enzyme regulation DNA, RNA, drugs (e.g., stimulants), energy storage, protein and starch synthesis, enzyme regulation, cell signaling Melting Point 214 C (417 F) 20 to 22 C (68 to 72 F) Molar Mass 120.115 gmol1 80.088 g mol1 Solubility (Water) 500 g/L Miscible Biosynthesis Liver Various tissues Catabolism Product Uric acid Ammonia and carbon dioxide Sources Carey, Francis A. (2008). Organic Chemistry (6th ed.). Mc Graw Hill. ISBN 0072828374.Guyton, Arthur C. (2006). Textbook of Medical Physiology. Philadelphia, PA: Elsevier. p. 37. ISBN 978-0-7216-0240-0.Joule, John A.; Mills, Keith, eds. (2010). Heterocyclic Chemistry (5th ed.). Oxford: Wiley. ISBN 978-1-405-13300-5.Nelson, David L. and Michael M Cox (2008). Lehninger Principles of Biochemistry (5th ed.). W.H. Freeman and Company. p. 272. ISBN 071677108X.Soukup, Garrett A. (2003). Nucleic Acids: General Properties. eLS. American Cancer Society. doi:10.1038/npg.els.0001335 ISBN 9780470015902.