Biochemistry

1) Cells are the basic unit and structure of life

2) All known living things are composed of cells

3) All cells come from pre-existing cells

All catalysts, enzyme work via the lowering of the activation energy for a reaction this causes the rate of the reaction to increase dramatically. Should be noted that most enzyme with tight binding reactions rates are millions of times faster than those of of catalyst similar reactions. causing rapid catalysis

An anaerobic reaction is a chemical process that occurs in the absence of oxygen. It involves the breakdown of organic compounds to release energy without the need for oxygen. Examples include fermentation in yeast cells and lactic acid production in muscle cells during intense exercise.

Enzymes can increase the speed of chemical reactions in several ways. I will explain one in detail (the most common one) and just mention another that I can think of.

Most often, they lower what is called the activation energy of a chemical transformation. Think of it this way- you have a bowling ball that is sitting half way up on the side of a mountain. You want to push the bowling ball up over the peak and let it roll down to the bottom of the other side. In order to do that, you have to put energy in to roll the ball all the way to the top, before it can roll down the other side.

This is an analogy for activation energy. A chemical reaction is a change in chemical state from a higher energy state (1/2 way up the mountain) to a lower energy state ( at the bottom on the other side). But, this doesn't happen spontaneously. Match heads don't just ignite on their own, and logs don't burst into flame. You have to put IN some energy before it can do down to its lower energy state (you have to push the ball UP some before it can roll to the bottom).

With that out of the way, we can get back to how the enzyme works. It LOWERS the needed activation energy. In our analogy, the enzyme would chop off the top of the mountain altogether, so we did not need to push the bowling ball as high before it could roll to the other side.

Now to get technical. When molecules combine, there is what is called an intermediate state. It is usually an unstable shape, and only present for an instant when the 2 molecules first join. Since it is an unstable and unfavorable state, it requires an input of energy to happen at all. This is why there is a hump to go over in our analogy. The active site of many enzymes is in the exact shape (only opposite) of this intermediate. You can think of the enzyme's active site as a sort of mold, where the 2 molecules come in, and it is much easier for them to join, form the intermediate, and end up in a more stable conformation. If they tried to join outside of the enzyme, it would require more energy input, because that intermediate state is not stabilized.

Enzymes can also form micro environments. For example, if a reaction needs to be in acid to occur, an enzyme can have a tiny micro environment that is acidic, in order for the reaction to happen as it needs to.

The product is a multi-nucleated cell. In the early Drosophila embryo, for example, the first 13 rounds of nuclear division occur without cytoplasmic division, resulting in the formation of a single large cell containing 6000 nuclei. Nuclear division without cytokinesis also occurs in some types of mammalian cells. Osteoclasts, trophoblasts, and some hepatocytes and heart muscle cells are multi-nucleated.. You're welcome -Scott

Without NAD+ in glycolysis, the conversion of glyceraldehyde-3-phosphate to 1,3-bisphosphoglycerate cannot occur, halting the production of ATP. As a result, glycolysis is inhibited, and the cell's ability to generate energy through this pathway is compromised.

Enzymes are biological catalysts that speed up chemical reactions in living organisms by lowering the activation energy required for the reaction to occur. They are highly specific and can catalyze a wide range of reactions within cells.

A lot of comes from the air. The air you breathe is around 78 percent nitrogen, so nitrogen enters your body with every breath.

Rhizobium bacteria is present in leguminous plants in their roots which extract nitrogen from the soil. These are generally present in dicot-seed plants. When you consume these plants, nitrogen enters your body.

Another way that nitrogen enters the body is through eating meat. When animals eat plants, those plants have nitrate in them which contains nitrogen so the animals have nitrogen in them now. Then, humans eat the meat from the animals, adding some nitrogen to our bodies.

Photosynthesis takes place in the cells of green plants.

The process of photosynthesis is carried out in the chloroplasts. More specifically, the light reaction takes place in the thylakoid membrane, while the dark reaction (light independent) takes place in the stroma.

Hydrogen bonds hold the two helices of a DNA molecule together. These bonds form between complementary base pairs on the two strands, specifically between adenine and thymine, and between cytosine and guanine. The strength of these hydrogen bonds contributes to the stability of the DNA double helix structure.

RNA primase is used to synthesize short RNA primers that are needed for DNA replication by DNA polymerase. This RNA primer can be easily replaced by DNA once DNA polymerase starts synthesizing the new DNA strand. This is different from DNA primase which synthesizes RNA primers during the synthesis of Okazaki fragments on the lagging strand during DNA replication in prokaryotes and eukaryotes.

Biological organization starts at the submicroscopic level because living organisms are made up of cells, which are the basic structural and functional units of life. Cells are made up of submicroscopic components such as molecules and organelles that carry out essential functions for the organism. Understanding this submicroscopic level is critical for understanding the organization and functioning of living organisms at higher levels of biological organization.

Measuring changes in O2 or CO2 levels allows you to indirectly assess metabolic rate because oxygen consumption and carbon dioxide production are byproducts of cellular respiration. Higher rates of metabolism lead to increased oxygen consumption and carbon dioxide production, providing a way to estimate an organism's metabolic activity.

Polysaccharides are made of many glucose molecules. During digestion these molecules get separated and digested. They are the source of energy and in body they are stored as a polymer of glucose called glycogen.

Lipids are mainly made of carbon, hydrogen, and oxygen; it's 1: >2 : 1 for C:H:O respectively.

Enzymes are Protein in Nature. Proteins are more precisely described as biochemical compounds. Some enzymes are combined with RNA to form for example Ribozymes.

Enzymes, while completely composed from Organic Protein, are merely one Form of Protein.

Adenine and guanine molecules are two of the four nitrogenous bases that help make up the structure of DNA. They are also known as "purine" bases because they have a double ring structure. The purine bases are extremely important in DNA formation and they specifically pair up with the other two nitrogenous bases, known as the "pyrimidine" bases. Adenine molecules will always pair with thymine molecules and guanine molecules will always pair with cytosine.

Bananas do not contain more Vitamin C than oranges. Bananas contain 10.74 mg of vitamin C versus oranges which contain 69.69 mg. The daily value % of bananas is 17.9%. The daily value % of oranges is 116%.

NAD+ is an electron carrier molecule that helps pass energy from glucose to other pathways in a cell by taking high-energy electrons and holding on to them until they can be transferred to other molecules.

Ribosomal RNA (rRNA) is a type of RNA that forms part of the ribosome, the cellular machinery responsible for protein synthesis. It helps in the binding and positioning of ribosomal proteins and mRNA during translation. rRNA plays a crucial role in the process of protein synthesis within cells.

Inducible: usually off for protein synthesis but can be turned on Non inducible, or REPRESSIBLE : usually on for protein synthesis but can be turned off Inducible: usually off for protein synthesis but can be turned on Non inducible, or REPRESSIBLE : usually on for protein synthesis but can be turned off

Acetylcholine is a neurotransmitter that is released in the synaptic cleft and goes over the sarcolemma down the tubule and promotes the release of calcium from the sarcoreticulum which then binds to proteins on actin which exposes binding spots for myosin to attach to and powerstroke causing muscle contraction.
movement, learning, memory, and sleep.

Benedict's solution is most commonly used for testing if sugars are present in any enzyme, or solution, that contains starch.

ex. Water

+

Starch

Then test for sugars with benedict's.

A nucleotide is made of a phosphate, a sugar and a nitrogenous base. In RNA the sugar is ribose and in DNA it is deoxyribose. The bases in DNA are A, T, G and C. The T is replaced by U in RNA.

Probably the most common of the signal transduction pathways is through the use of G proteins. These proteins are found with three subunits. When activated by a GPCR, or a G Protein-Coupled Receptor, they drop off bound GDP and pick up GTP and the subunits separate. G-alpha will help phosphorylate other proteins which end up amplifying the signal. This leads to many signaling pathways.