12 which of the following correctly describe a feature of how enzymes function as reaction catalysts? Tutorial

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DNA, RNA, and Proteins [1]

Which of the following best describes the action of an enzyme?. Slows down reactions so in order to obtain more prducts from the substrate
Catalyze reactions by lowering energy of activation. Enzymes are biological molecules that help catalyze reactions by lowering the energy of activation and increasing the rate of a reaction
Inhibitors and activators can affect enzymes activity by slowing down and increasing enzyme activity respectively.. Which of the following does not affect the activity of enzymes?

The Central Role of Enzymes as Biological Catalysts [2]

By agreement with the publisher, this book is accessible by the search feature, but cannot be browsed.. A service of the National Library of Medicine, National Institutes of Health.
Although RNAs are capable of catalyzing some reactions, most biological reactions are catalyzed by proteins. In the absence of enzymatic catalysis, most biochemical reactions are so slow that they would not occur under the mild conditions of temperature and pressure that are compatible with life
Cells contain thousands of different enzymes, and their activities determine which of the many possible chemical reactions actually take place within the cell.. Like all other catalysts, enzymes are characterized by two fundamental properties

What are the main characteristics of an enzyme ? [3]

It is a protein and therefore, gets destroyed by heating.. It acts only on one kind of substance called the substrate
It always forms the same end products from the fixed substrate.. It acts best within a narrow temperature range, usually between 35°C-40°C
What are the main characteristics of the meridians?. What are the main characteristics of the parallels?

4.1 Energy and Metabolism – Concepts of Biology – 1st Canadian Edition [4]

– State the first and second laws of thermodynamics. – Explain the difference between kinetic and potential energy
Scientists use the term bioenergetics to describe the concept of energy flow (Figure 4.2) through living systems, such as cells. Cellular processes such as the building and breaking down of complex molecules occur through stepwise chemical reactions
Just as living things must continually consume food to replenish their energy supplies, cells must continually produce more energy to replenish that used by the many energy-requiring chemical reactions that constantly take place. Together, all of the chemical reactions that take place inside cells, including those that consume or generate energy, are referred to as the cell’s metabolism.

Oxford University Press [5]

Patrick: An Introduction to Medicinal Chemistry 6e Chapter 03 Instructions Answer the following questions and then press ‘Submit’ to get your score. Question 1 Which of the following statements is false with respect to an enzyme’s ability to catalyse a reaction? a) An enzyme provides a reaction surface and a suitable environment for the reaction to take place
c) An enzyme allows the reaction to go through a less stable transition state than would normally be the case. d) An enzyme can weaken bonds in reactants through the binding process
b) An active site is normally hydrophilic in nature. c) Substrates fit into active sites and bind to functional groups within the active site

Enzymes: Function, definition, and examples [6]

Enzymes help speed up chemical reactions in the human body. They are essential for respiration, digesting food, muscle and nerve function, among thousands of other roles.
Enzymes provide help with facilitating chemical reactions within each cell.. Since they are not destroyed during the process, a cell can reuse each enzyme repeatedly
This article reviews what enzymes are and the roles they play in various parts of the body.. Each cell contains thousands of enzymes, providing specific help throughout the body.

Serine Protease, Enzyme Catalysis [7]

A pile of sugar or a bottle of olive oil can sit unchanged for years at room temperature. Yet at similar temperatures, cells can convert the molecules that compose sugar and oil into a vast array of other molecules, and release energy at the same time
How do enzymes manage to perform conversion reactions without these chemical tools? The key components in these cellular reactions are enzymes — protein catalysts that speed up reactions, specify the products that are made, and allow for careful control of the reaction rates. How did scientists figure out these essential reaction-facilitating features of enzymes? The story of research on serine proteases provides an example.
When the reaction is finished, the amount of catalyst has not changed. However, a chemical reaction accelerated by a catalyst must still be energetically downhill, if not it would not occur

Wikipedia [8]

Enzymes (/ˈɛnzaɪmz/) are proteins that act as biological catalysts by accelerating chemical reactions. The molecules upon which enzymes may act are called substrates, and the enzyme converts the substrates into different molecules known as products
The study of enzymes is called enzymology and the field of pseudoenzyme analysis recognizes that during evolution, some enzymes have lost the ability to carry out biological catalysis, which is often reflected in their amino acid sequences and unusual ‘pseudocatalytic’ properties.[2][3]. Enzymes are known to catalyze more than 5,000 biochemical reaction types.[4] Other biocatalysts are catalytic RNA molecules, called ribozymes
Like all catalysts, enzymes increase the reaction rate by lowering its activation energy. Some enzymes can make their conversion of substrate to product occur many millions of times faster

Structure, Classification, and Function [9]

The human body is composed of different types of cells, tissues and other complex organs. For efficient functioning, our body releases some chemicals to accelerate biological processes such as respiration, digestion, excretion and a few other metabolic activities to sustain a healthy life
Let us understand what are enzymes, types, their structure, mechanism and various factors that affect its activity.. “Enzymes can be defined as biological polymers that catalyze biochemical reactions.”
Metabolic processes and other chemical reactions in the cell are carried out by a set of enzymes that are necessary to sustain life.. The initial stage of metabolic process depends upon the enzymes, which react with a molecule and is called the substrate

Enzymes: What Are Enzymes, Pancreas, Digestion & Liver Function [10]

Enzymes are proteins that help speed up metabolism, or the chemical reactions in our bodies. But enzymes are also in manufactured products and food.
Digestion is the process of turning the food we eat into energy. For example, there are enzymes in our saliva, pancreas, intestines and stomach
There are thousands of individual enzymes in the body. For example, the enzyme sucrase breaks down a sugar called sucrose

Select Reasons Why Metabolic Pathways Are Regulated. — I Hate CBT’s [11]

____________ are proteins or RNA molecules that act as catalysts to speed up reactions in living organisms.. They lower the activation energy of a reaction by binding to the substrates.
A reactant molecule that binds to the active site of an enzyme. When a reactant binds to the active site of an enzyme, a(n) ___________-____________ complex forms.
-Enzymes lower the activation energy required for new bonds to form in a chemical reaction increase. Select the events that must occur before bonds in the substrate are broken during an enzyme catalyzed reaction.

Protein – Enzymes, Action, Mechanism [12]

An enzyme attracts substrates to its active site, catalyzes the chemical reaction by which products are formed, and then allows the products to dissociate (separate from the enzyme surface). The combination formed by an enzyme and its substrates is called the enzyme–substrate complex
The substrates are attracted to the active site by electrostatic and hydrophobic forces, which are called noncovalent bonds because they are physical attractions and not chemical bonds.. As an example, assume two substrates (S1 and S2) bind to the active site of the enzyme during step 1 and react to form products (P1 and P2) during step 2
The enzyme, unchanged by the reaction, is able to react with additional substrate molecules in this manner many times per second to form products. The step in which the actual chemical transformation occurs is of great interest, and, although much is known about it, it is not yet fully understood

which of the following correctly describe a feature of how enzymes function as reaction catalysts?
12 which of the following correctly describe a feature of how enzymes function as reaction catalysts? Tutorial


  1. https://www.varsitytutors.com/high_school_biology-help/dna-rna-and-proteins?page=17#:~:text=Which%20of%20the%20following%20best%20describes%20the%20action%20of%20an%20enzyme%3F&text=Explanation%3A,the%20rate%20of%20a%20reaction.
  2. https://www.ncbi.nlm.nih.gov/books/NBK9921/#:~:text=Enzymes%20(and%20other%20catalysts)%20act,through%20the%20same%20transition%20state.
  3. https://byjus.com/question-answer/what-are-the-main-characteristics-of-an-enzyme/#:~:text=It%20only%20affects%20the%20rate,%C2%B0C%2D40%C2%B0C
  4. https://opentextbc.ca/biology/chapter/4-1-energy-and-metabolism/
  5. http://global.oup.com/uk/orc/chemistry/patrick6e/student/mcqs/ch03/
  6. https://www.medicalnewstoday.com/articles/319704
  7. https://www.nature.com/scitable/topicpage/enzyme-catalysis-the-serine-proteases-nbsp-14398894/
  8. https://en.wikipedia.org/wiki/Enzyme
  9. https://byjus.com/biology/enzymes/
  10. https://my.clevelandclinic.org/health/articles/21532-enzymes
  11. https://www.ihatecbts.com/questions-answers/2023/5/6/select-reasons-why-metabolic-pathways-are-regulated
  12. https://www.britannica.com/science/protein/The-mechanism-of-enzymatic-action
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