archive-org.com » ORG » B » BIOLOGY-ONLINE.ORG

Total: 791

Choose link from "Titles, links and description words view":

Or switch to "Titles and links view".
  • Biology-Online • View topic - Help me understand the concept of Catabolism
    grounds that it breaks the little molecules from assimilation into much littler ones as ATP is made These are both critical processes on the grounds that ATP is the thing that your cells use to deliver body warmth move your muscles and other fundamental substantial capacities If you need a complete study or written paper about the Catabolic responses and process the experts from top essay writing services will be a great support for you Choose the best one Reply with quote BrianEvans BrianEvans Posts 4 Joined Mon Jan 25 2016 5 05 am Re Help me understand the concept of Catabolism Mon Jan 25 2016 5 14 am Catabolism is the set of metabolic pathways that breaks down molecules into smaller units that are either oxidized to release energy or used in other anabolic reactions Catabolism breaks down large molecules such as polysaccharides lipids nucleic acids and proteins into smaller units such as monosaccharides fatty acids nucleotides and amino acids respectively Cells use the monomers released from breaking down polymers to either construct new polymer molecules or degrade the monomers further to simple waste products releasing energy Cellular wastes include lactic acid acetic acid carbon dioxide ammonia and urea The creation of these wastes is usually an oxidation process involving a release of chemical free energy some of which is lost as heat but the rest of which is used to drive the synthesis of adenosine triphosphate ATP This molecule acts as a way for the cell to transfer the energy released by catabolism to the energy requiring reactions that make up anabolism Catabolism is seen as destructive metabolism and anabolism as constructive metabolism Catabolism therefore provides the chemical energy necessary for the maintenance and growth of cells Examples of catabolic processes include glycolysis the citric acid cycle the

    Original URL path: http://www.biology-online.org/biology-forum/about42947.html (2016-02-17)
    Open archived version from archive


  • Biology-Online • View topic - Protein Question
    31 2015 6 00 pm Actually yes There are numerous examples in nature In the course of evolution protein sequences change more rapidly than protein structures Many enzymes therefore strikingly similar structures but are very different in their primary sequences An example i just dug out from an old lecture are the enzymes benzoylformate decarboxylase and pyruvate decarboxylase Both enzymes share the same fold to a high degree but just 21 of their sequences are identical Reply with quote BrianEvans BrianEvans Posts 4 Joined Mon Jan 25 2016 5 05 am Re Protein Question Mon Jan 25 2016 5 22 am Protein structure is the three dimensional arrangement of atoms in a protein molecule Proteins are polymers specifically polypeptides formed from sequences of monomer amino acids By convention a chain under 40 amino acids is often identified as a peptide rather than a protein 1 To be able to perform their biological function proteins fold into one or more specific spatial conformations driven by a number of non covalent interactions such as hydrogen bonding ionic interactions Van der Waals forces and hydrophobic packing To understand the functions of proteins at a molecular level it is often necessary to determine their

    Original URL path: http://www.biology-online.org/biology-forum/about43044.html (2016-02-17)
    Open archived version from archive

  • Biology-Online • View topic - About a 45 there's really no reason to go more here
    go more here and so notice if you re leaning on your right hip more than your left try to lay your upper body be relaxed so that gravity can pull your hips down little bit lower who ll take three to five more baths here sector what your palms back in curl your back toes under make your way back pre training fitness http pre trainingfitness com Reply with

    Original URL path: http://www.biology-online.org/biology-forum/about43319.html (2016-02-17)
    Open archived version from archive

  • Biology-Online • View topic - PLEASE READ--Help With Homework!
    evolution of plants on land as they offer a plant s offspring several survival advantages They protect and nourish a plant s embryo disperse the offspring and delay the growth of the embryo until conditions are favorable 4 Summarize how plants are adapted to living successfully on land A Plants are adapted to living successfully on land because of multicellularity It enabled plants to develope featues that helped them live more successfully on land These features included the ability to absorb nutrients from their surroundings the ability to prevet their bodies from drying out and the ability to reproduce without wate to transmit sperm 5 Describe two basic differences between nonvascular plants and vascular plants A Vascular plants have a system of well developed tissues that transport water within a plant The nonvascular plants lack a vascular system They also lack true roots stems and leaves wherease vascular plants do not 6 Identify three key features of each of the four major groups of plants A Nonvascular plants small size larger gametophyte require water for sexual reproduction seedless vascular plants vascular system larger sporophyte drought resistant spores gymnosperms seeds greatly reduced gametophytes wind pollination angiosperms flowers fruits endosperm 7 Classify each of the following plants as one of the four major groups of plants pine trees carnations sphagnum moss and wood fern A Pine trees gymnosperms carnations angiosperms sphagnum moss nonvascular plants wood fern seedless vascular plants 8 Why are angiosperms said to be the most successful group of plants A Angiosperms are said to be the most sucessful group of plants because of their key features flowers fruits and endosperm Their flowers promote pollination and fertilization attract insects and other animals that carry pollen and increase the likelihood of cross pollination The female reproductive part of a flower also

    Original URL path: http://www.biology-online.org/biology-forum/about43308.html (2016-02-17)
    Open archived version from archive

  • Biology-Online • View topic - Measuring OD600
    absorbing sample in the cuvette For me am I right log Io I is either absorbance or optical density I was sometimes surprised to see that some people use sophisticated spectrophotometers without knowing this very basic and very useful law of physics Reply with quote Redinorun Redinorun Posts 3 Joined Tue Dec 29 2015 5 45 pm Fri Jan 01 2016 12 39 pm Well thanks for the reply but I still didn t really understand that your last part about log Io I is either absorbance or optical density didn t make any sense But it made me search for the answer in physics And yes the answer does lie in Beer Lambert s law I think it s like that Absorbance A log I I0 where I intensity of light that passes through the sample I0 initial light intensity But also A aλ b c where aλ absorptivity coefficient which depends on wavelength b length of path c concentration of analyte Optical density measured by the spectrophotometer OD A L where L thickness of the sample eg the kivette thickness is 1cm on which the optical density depends The optical density is also directly proportional to the concentration Therefore optical density and absorbance are not the same thing Reply with quote claudepa claudepa Posts 27 Joined Tue Nov 03 2015 12 43 pm Re Measuring OD600 Fri Jan 01 2016 9 15 pm Hi I am pleased that your research on Beer Lambert law that I did not use since a very long time did bring you some more information I think we are not very far since if I also remember my maths from very far log I Io log Io I Also as usually the thickness is 1cm this means OD A since L b 1

    Original URL path: http://www.biology-online.org/biology-forum/about43271.html (2016-02-17)
    Open archived version from archive

  • Biology-Online • View topic - For years exercise enthusiasts accept doubtable
    it seemed analytic that an alive affairs would advice the brain the accurate affirmation was lacking Now several biological studies announce that alive out does account the brain The affidavit to get affective are greater than you think Now advisers are award biological affirmation that exercise allowances specific academician mechanisms And it even contributes to growing new neurons While we acclimated to anticipate that the academician loses beef as we

    Original URL path: http://www.biology-online.org/biology-forum/about43228.html (2016-02-17)
    Open archived version from archive

  • Biology-Online • View topic - Crohn's Disease question
    Post a reply Reply with quote Superstar1 Superstar1 Posts 1 Joined Thu Dec 17 2015 7 22 am Crohn s Disease question Thu Dec 17 2015 7 27 am What would be the histopathological view of Crohn s disease Post a reply Jump to Select a forum General Biology General Discussion Cell Biology Molecular Biology Zoology Discussion Evolution Microbiology Bioinformatics Human Biology Botany Discussion Genetics Physiology Ecology Biology Documents Biology

    Original URL path: http://www.biology-online.org/biology-forum/about43216.html (2016-02-17)
    Open archived version from archive

  • Biology-Online • View topic - Entropy of "life as a whole" actually increase over time?
    reactions observing the system that creates us To me it might be the 2 different sides of the same coin After all what is the meaning of human biology I am only referring to the mechanistic properties of our bodies for a non living thing Maybe meaningless chemicals Reply with quote minasole minasole Posts 26 Joined Tue Oct 16 2012 10 08 pm Thu Nov 05 2015 4 02 pm If you heartlessly consider life as a WHOLE without dividing it into species organisms etc you merely get a huge system of complex chemical reactions The natural history of these reactions led to the forms we see today Through our perspective we are some chemical compounds in constant change while we are studying this history we see all the processes that led to all that we see today or else evolution We see everywhere purpose and anthropocentrism but its only because we are the results of all these Lets answer some critical questions 1 The reactions of life don t differ in quality than those of simple reactions that have nothing to do with life for example fire or creation of water but they are far too simple to be perceived as life or else they don t look enough like us 2 What about the basic properties of life a Homeostasis and self sustaining ability Everything happens for a reason All is coordinated in a way that has one remarkable result To sustain you alive But if you are the result of all these and you study what brought you here isnt it like watching the same thing from another perspective b Self replication How can random chemical ractions manage to replicate themselves But I think its obvious that in a chaos of chemical reactions only those with some kind of repeatability and periodicity will not lead to a dead end and will be able to continue In the long term So in general these are the ones that survived and that s what through our perspective receive as reproduction 3 What about evidence Of course scientific facts are confirmed only experimentaly Well I think that one can easily design experiments to check if an isolated life form acts like a series of just chemical reactions or there is something more Also we can study the decaying patterns of life forms in deep seas and other unhostile environments 4 What about organic chemistry Any complex chemical reaction system will eventually become organic at the end If equilibrium is avoided inorganics will be slowly substituted in the flask by organics That is because of the certain properties of organic reactions that will make them prevail in the long term such as many stereotactic isoforms etc that helps them avoiding equilibrium and leading to increasingly complex reacting systems Reply with quote minasole minasole Posts 26 Joined Tue Oct 16 2012 10 08 pm Sun Dec 06 2015 9 30 am Question How can random reactions no matter how good they were

    Original URL path: http://www.biology-online.org/biology-forum/about42926.html (2016-02-17)
    Open archived version from archive



  •