Enzymes are proteins that contains ribonucleic acid (RNA) .An enzyme binds to one or more reactant Molecule in order to catalyze a reaction.
Explanation:
1. Enzymes speed up chemical reactions by lowering the Activation Energy, which allows the reaction to proceed much more quickly.
2. During an enzymatic reaction, a molecule of Substrate binds to the enzyme and is broken down into one or more molecules of product, which are released.
3. The induced fit between an active site and its substrate often strains bonds and helps the reaction proceed
4. The specific location within an enzyme molecule where the substrate binds is called the Active site.
5. Lactose takes years to break down on its own. But if exposed to the protein lactase, the reaction proceeds very quickly, while lactase itself remains unchanged. Lactase is an example of an enzyme
6. High temperatures or changes in pH can an enzyme, causing it to lose its shape and biological activity. An inhibitor is a molecule that can bind to an enzyme and prevent the enzyme from working.
7. An enzyme is considered a Catalyst because it speeds up a chemical reaction without being used up.
Answer:
The answer is B, precambarian
A.
The human brain is estimated to have billions of these connections, according to some researches, about 100 billion.
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D. descriptive investigations
Explanation:
A scientist studying the star Alpha Centauri would probably rely on descriptive investigation to gather data.
In descriptive investigation, experiments cannot be performed since the subjects cannot easily be manipulated or they are far too inaccessible. This form of investigation is based on indirect qualitative investigation of a phenomenon.
- Alpha Centauri is a distant star several light years away from the vicinity of the scientist.
- The best way to investigate this distance body is to make inferences from the evidence gathered from observatory stations using telescopes.
- Astronomers can collect different information and give vivid description of the distant start.
- It is highly impossible to make comparisons and alter variable in this kind of investigation.
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