<p>@ mifune: I have trouble understand the difference between humoral and cell-mediated response. Could you please explain? Also, I am confused about the “cycle” of both NAD+, FAD, NADH, and FADH2 in Aerobic and Anaerobic respiration. I forgot how they get recycled in aerobic and how anaerobic bypasses some restrictions.</p>
<p>A question that does not relate to Biology, although it may be useful to some: How does one go about converting short-term memory into long-term memory?</p>
<p>For example, I can understand concepts in Biology really well, but I find it difficult to remember what was taught at the beginning of the school year.</p>
<p>The essential difference between the two is that the cell-mediated response does not involve antibodies or any complement systems that help to eradicate pathogens from the organism. Basically, the cell-mediated response is controlled by T cells which detect any changes in cells.</p>
<p>The humoral response (antibody-mediated response) targets the pathogens themselves, not the cells that they may affect. This is controlled by the B cells.</p>
<p>NADH, a coenzyme, first forms during glycolysis (2 molecules) when two electrons and a proton (H+), obtained from an intermediate molecule in the breakdown, react with NAD+ to form NADH. NADH is basically the energy-rich molecule that assists in the Krebs Cycle and provides the electrons needed in the electron transport chain during oxidative phosphorylation.</p>
<p>FADH2, another coenzyme, is created during the Krebs Cycle by combining with electrons (similar to the formation of NADH). This too also provides electrons to the electron transport chain in the formation of ATP. The NAD+ and FAD molecules do not return to their coenzyme states until glucose is once again used for respiration.</p>
<p>Oh, how I wish I knew the answer! I honestly could not offer a decent answer. Perhaps you can learn more by reading the Wikipedia page pertaining to memory. </p>
<p>Reactions that require light in order to be completed. I think this is what some of the reactions need in the step from gylcoysis to kreb’s cycle.</p>
<p>Glycolysis and Kreb’s cycle do not require light, they are reactions which take place under respiration not photosynthesis.</p>
<p>Light-dependent reactions require light
More seriously, Light dependent reactions are going to be the ones which involve the excitement of electrons in chlorophyll. PSII (photosystem two) is the first PS to become excited. Chlorophyll “replenishes” its electrons by stripping electrons from water resulting in the release of H+ and OH. The H+ is used to power atp synthase to produce ATP calld photophosphorilation i believe. The end products of photosynthesis are NADPH and ATP.</p>
<p>Light-indepndent Reactions involve the fixation fo CO2 into glucose. More to it but im tired. TBH the only way i felt to get Photosynthesis and Respiration was to read the book till i got it (once). Things I felt were important when i took the test were location of processes i.e. glycolysis takes place in the cytoplasm blaha blah abalh. And the Products i.e. Glycolysis results in 2 NET ATP and 2 pyruvates (or is it 4? 2 right?)</p>
<p>My class has done bacteria, protists, and 2 days left of plants, we have aminals and fungi left. Spent 1 day on bacteria, 2 on protists, and going to spend 4 on plants… Block schedule working out for us.</p>
<p>There are certainly some available from the Course Manual and from the guide that I study from. I will post them tomorrow. I am a bit short on time today.</p>
<p>Codminance occurs when two alleles of a gene are expressed at the same time. Neither is dominant nor recessive over the other. One example is in AB blood types, another is red flower blossoms and white flower blossoms which produce pink flower blossoms. However, this shouldn’t be mistake as “blending”. Just both alleles are being expressed.</p>
<p>Thanks for starting this thread, guys. I’m in an AP bio class where we’re going way too slowly and I need to self-study at this point. I am just starting biotechnology but have everything before it read as well as an overview of ecology…do any of you have the LIFE book with a big babboon on the front? My teacher has covered some chapters which I don’t think will be on the AP test (genome expression + regulation in eukaryotes…can’t find it in a review book), so I’m trying to figure out which chapters are most important.</p>
<p>What are the differences between eukaryotes and prokaryotes in cellular replication? (This is part of an old FR question my teacher used).</p>
<p>Prokaryotes do not have a nucleus; they simply have a circular DNA molecule in the cytosol. They split through binary fission. Eukaryotes replicate DNA before engaging in mitosis.</p>
<p>What are some other differences between euk and prok cells?</p>