Uracil (U) is not part of DNA but is part of RNA
Answer:
Air particles are a mixture of solids and liquids that are microscopically tiny and suspended by air currents. It can stay in the atmosphere for a few hours to a month or two. Their constituents can be various harmful substances such as heavy metals - lead, nickel, arsenic, cadmium or polycyclic aromatic hydrocarbons
Explanation:
Air particles, nitrogen dioxide and ground-level ozone are now considered to be the three most polluting substances in human health. Exposure during peak concentration and long-term exposure to these pollutants can cause damage from respiratory distress to premature death.
If the inducer [allolactose] is present in the negative control then it will bind to the repressor decreasing its ability to bind to the operator due to which the transcription begins again and the operon is turned on.
Lac Operon is a set of three genes z, y & a which are regulated under the same promoter which regulates the amount of lactose production in the cell.
An inducer is a molecule that has the ability to induce or activate the operon. ex- in the case of the lac operon, allolactose acts as an inducer.
A repressor is a molecule that will repress or restricts the transcription of the genes of the operon, as a result, the operon will be switched off.
When the lac operon is under negative control, with no CAP [catabolite repressor protein] binding activity, the repressor remains active and thus binds to the operator region of the operon, as a result, no transcription takes place and the operon will be switched off.
But if the inducer will be present even in the negative control then the transcription takes place and the operon will be on.
Learn more about lac operon here
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Eating regular meals establishes healthy eating habits, keeps you energized throughout the day, and can cause you to lose weight. regular eating habits establish healthy eating habits because it's always good to eat regularly. One of the biggest misconceptions to losing weight fast and in a healthy manner is by not eating, that is false. If you eat regular meals you can lose weight perfectly fine. The more calories you eat the more you lose, now i'm not saying eat a million and one candy bars, i'm saying if you eat food that is healthy can get you to lose weight. That also doesn't mean live off of carrots and strawberries for a week! You have to eat normally. So a peanut butter and jelly sandwich, pasta, rice or any kind of meat is the way to lose weight vs eating low calorie anything or a candy bar. Every type of food gives you energy! It all depends what it is too predict how much energy you'll receive or how long it will last. For instance, a candy bar will give you a lot of energy, fast but won't last as long as eating pasta or rice for energy. Eating regular meals does cause you to gain weight but thats a good thing, it gives you energy, muscle and can help you lose weight. Eating regular meals actually does the opposite of causing you to be hungry more often, it keeps you fuller for longer.
Answer:
<u><em>definition;</em></u>
enzymes are protein that catalyze speed up the biochemical reactions and are not changed during the reaction . the molecules at which enzyme work are called <em>substrate </em> and enzymes convert them into different molecules called products.
<em><u>benefits of enzyme in digestion ;</u></em>
enzyme lower the activation energy in several ways. they may alter the shape of substrate and reduce the requirement of activation energy . enzyme may also lower activation energy by bringing substrate in correct orientation to react . enzyme break down <em>carbohydrates, lipids and proteins </em>which are component of human food .In digestion larger molecules are broken into smaller molecules like amino acids ,simple sugars ,fatty acid ,vitamins ,salts and water to provide to cells. these molecules are a part of larger molecules like protein ,polysaccharids and lipids . enzymes like amylaze, lypase ,salivary amylase, pepsin ; it is a very strong protein digesting enzyme it is released in its inactive form pepsinogen which is converted into pepsin with the help of H-C-L hydrochloric acid it takes part in digestion in stomach
