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How many different kinds of amino acids make up proteins?

Amino acids are the most basic building block of a protein. The twenty amino acids are: alanine, arginine, asparagine, aspartic acid, cysteine, glutamic acid, glutamine, glycine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, proline, serine, threonine, tryptophan, tyrosine, and valine. All amino acids contain an alpha carbon that is connected to an amino functional group, a carboxylic acid functional group, and the R-group unique to each amino acid.

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What is any substance to the right of the arrow in a chemical equation?

As matter cannot be created or destroyed, every atom in the reaction must also be present in the product in some form. There are many possible outcomes for a chemical reaction, depending on what elements and compounds are involved and their specific concentrations. The reaction can cause compounds to separate into elements or elements to join into new compounds. Compounds may also break apart and join together with other elements to form new compounds.

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What was the average cost of solar panels in 2014?

Solar panels work by allowing photons to knock electrons free from atoms, which in turn generates the flow of electricity, states Live Science. Solar panels consist of smaller units called photovoltaic cells that convert sunlight to energy.\nThe photovoltaic cells do not work without establishing an electric field. The separation of opposite charges is what creates this field. Silicon and other materials within the cells produce the needed electrical charge.

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What are the three parts of a nucleotide?

One nitrogenous base, known as purine, is comprised of adenine and guanine. The other nitrogenous base is pyrimidine, which is cytosine and thymine. These bases combine to form DNA. RNA formation is slightly different, as uracil is substituted for thymine.\nDeoxyribose is the sugar subunit in a DNA molecule, while ribose is the sugar subunit of an RNA molecule.\nNucleotides form nucleic acids, which are organic compounds that are found in every cell. These compounds are chemically linked to form DNA and RNA strands.

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What is the difference between amphibians and reptiles?

Both adult and juvenile reptiles breathe by means of lungs, and the young are basically replicas of their parents. Amphibians go through a larval stage where their young may resemble fish and breathe with gills. As the larva grows, it slowly grows legs, loses its gills and acquires lungs. Still, it must stay close to a water source to keep its skin from drying out and for breeding. In the case of frogs and toads, the digestive systems of the adult and the tadpole are also different. Frogs and toads are largely carnivorous, while tadpoles eat vegetation.\nThere are a few exceptions to the rules..

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Can you tell the overall charge of any IV solution and why it is so?

Group IV elements of the Periodic Table are comprised of three types of elements: nonmetals, metals and semimetals. An example of a nonmetal is carbon. Germanium and silicon are examples of semimetals. Examples of metals are lead and tin. Lead, which is symbolized by Pb, reacts with nitric (IV) acid to produce Pb(NO3)2, H2O or water and NO2 as a gas. Pb(NO3)2, which is an aqueous solution, has a neutral charge since Pb2+, which has two positive charges, cancels out 2NO3-, which has two negative charges.

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What are the differences between the male and female pelvis?

Men have narrower sciatic notches than women, the angle at which the two pelvic bones join at the front are acute and the angle in women is obtuse. Women also have a more outwardly-flared hip bone while men's are narrower. Most of these differences are due to the reproductive needs of the female anatomy. Women's pelvic bones are thinner and lighter than men's pelvic bones. The wider and shorter stature of a woman's hips allows more space for a baby's head to pass through when it is born. The angle of the acetabulum is angled more to the front, which changes the gait an..

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Why do elements tend to form compounds?

The Octet Rule says that atoms form compounds to reach eight electrons in their outer shell. This rule sums up the chemical activity that occurs between the elements on the periodic table. The reason for this tendency is electron affinity, which varies between metal to non-metal atoms. Non-metallic atoms tend to have a high electron affinity where metals electron affinity is generally low. Although there are other factors, electron affinity is the reason behind chemical bonding between atoms.\nIn direct correlation to an atoms outer shell and electron affinity, the differences in nuclear shiel..

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Why does fire need oxygen to burn?

When wood is heated to about 300 degrees Fahrenheit, the heat begins to break down the cellulose, releasing volatile gases. When the gases reach about 500 degrees Fahrenheit, the compound molecules begin to break apart and recombine with oxygen to form carbon dioxide and other products. This process is called oxidation, and heat is a side effect of the process. The heat generated by the violent oxidation of wood or other fuels is seen and felt as fire. This heat is often sufficient to ignite other fuels, making fire a self-sustaining process.

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What is the gravitational pull of Mercury?

Comparatively, the same object would weigh only 6.7 pounds on Pluto, 12.64 pounds on Jupiter's moon Callisto, 16.7 pounds on Earth's moon, 37.7 pounds on Mars and 236.4 pounds on Jupiter. Because of the size and low gravity on Mercury, it has almost no atmosphere and has a temperature range from -346 to 950 degrees Fahrenheit. Mercury circles the sun in only 88 days, and its surface resembles that of Earth's moon. With a diameter of only 3,000 miles and only 5.5 percent of the volume of Earth, Mercury is the smallest planet in the solar system.

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