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BASIC BIOCHEMISTRY QUESTIONS AND ANSWERS WITH SOLUTIONS 2024
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BASIC BIOCHEMISTRY QUESTIONS AND ANSWERS WITH SOLUTIONS 2024
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BASIC BIOCHEMISTRY QUESTIONS AND ANSWERS WITH SOLUTION S 2024 Atom - ANSWER basic unit of matter Nucleus - ANSWER center of atom electron - ANSWER negatively charged particle in electron cloud(atomic number = number of protons) proton - ANSWER positively charged particle at center of atom(atomic number & number of electrons) element - ANSWER pure substance that consists entirely of one type of atom. isotopes - ANSWER atoms that differ in the number of neutrons they contain radioactive isotopes - ANSWER nuclei are unstable and break down at a constant rate over time compound - ANSWER substance formed by 2 or more elements in definite proportions ionic bind - ANSWER one or more electrons are transferred from one atom to another ions - ANSWER electrically charged atoms that have gained or lost electrons. covalent bond - ANSWER a chemical bond that involves sharing a pair of electrons between atoms in a molecule molecule - ANSWER two or more atoms held together by covalent bonds van der Waals forces - ANSWER intermolecule force of attraction polar substance - ANSWER molecule in which the charges are unevenly distributed (cell membrane is non polar and surrounds cells in our body; some animals use oils to waterproof themselves) hydrogen bond - ANSWER attraction between a hydrogen atom with a partial positive charge and another atom with a partial negative charge Properties of Water - ANSWER great solvent high heat capacity polar substance less dense as solid surface tension strong adhesion cohesion cohesion - ANSWER attraction between molecules of the same substance(allows water and other liquids to be transported throughout organisms) adhesion - ANSWER attraction between molecules of different substances(from hydrogen bonds) surface Tension - ANSWER resistance on top from hydrogen bonds (organisms use tension to move across water) heat Capacity - ANSWER amount of heat energy required to increase its temperature -absorbs and releases heat slowly (helps organisms maintain homeostasis) less dense than solid - ANSWER ice floats( allows organisms to live under the ice) mixture - ANSWER a material composed of two or more elements or compounds that are physically yet not chemically combined solution - ANSWER type of mixture in which all components are evenly distributedThe benefits of buying summaries with Stuvia:
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