Nitrogenous extending from it like teeth of a comb

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Nitrogenous ______ extending from it like teeth of a comb. From the Virtual Cell Biology Classroom on ScienceProfOnline.com
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Nucleic Acids - DNA DNA is a double stranded molecule, analogous to a ladder. The “ladder” = • two deoxyribose-phosphate chains form the side rails • base pairs, linked by hydrogen bonds, form the “ rungs” . Purine Bases (double ring) Adenine & Guanine Pyrimidine Bases (single ring) Cytosine & Thymine Base Pairs (purine always pairs with pyrimidine): Adenine + Thymine Cytosine + Guanine ______________ attract the bases from one strand to the bases on the other strand and also twist the phosphate-sugar backbones into a helix. Images: Model of DNA Molecule , Field Museum, Chicago, T. Port DNA , Biology Corner Website << Q: How do I remember this? From the Virtual Cell Biology Classroom on ScienceProfOnline.com
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Image: DNA Molecule , National Science Foundation From the Virtual Cell Biology Classroom on ScienceProfOnline.com
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ATP Production and Energy Storage Q: This molecule has a sugar, a base and three phosphate groups. What kind of monomer is it? Adenosine 5'-triphosphate Multifunctional "molecular currency" of intracellular energy transfer. Organisms release energy from nutrients; can be concentrated and stored in high-energy phosphate bonds of ATP. Transports chemical energy within cells for metabolism. Produced as energy source during ___________ and ________________ . Consumed by many enzymes and a multitude of cellular processes Image: ATP Molecule , NEUROtiker; ATP-ADP Cycle , CUNY From the Virtual Cell Biology Classroom on ScienceProfOnline.com
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Organic Molecules – Lipids (Fats, Phospholipids, Waxes & Steroids) Hydrophobic macromolecules…insoluble in water. Not attracted to water because … non-polar covalent bonds linking carbon & hydrogen aren’t attracted to the polar bonds of water . Images: Cholesterol , Wiki; Phospholipid Structure , Bryan Derksen. Wiki Honeycomb , Wikii; Oil & Water , Kidipede From the Virtual Cell Biology Classroom on ScienceProfOnline.com
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Organic Molecules – Lipids ( Fats , Phospholipids, Waxes & Steroids) Fats Fats and oils are made from two kinds of molecules: ____________ (a type of alcohol) _____________ (triglycerides) Images: Oil & Water , Kidipede From the Virtual Cell Biology Classroom on ScienceProfOnline.com
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Organic Molecules – Lipids (Fats, Phospholipids , Waxes & Steroids) Phospholipids Phospholipids are a major component of all cell membranes. Most phospholipids contain a diglyceride as the tail, and a phosphate group for head. Hydrocarbon tails ___________ , but phosphate heads are _____________ . So phospholipids are soluble in both water and oil. Tails from both layers facing inward and the heads facing outward = _________________. Image: Cell Membrane , Wiki; From the Virtual Cell Biology Classroom on ScienceProfOnline.com
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Organic Molecules – Lipids (Fats, Phospholipids, Waxes & Steroids ) Waxes Do not have a hydrophilic head: so completely water insoluble.
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