How do enzymes speed up chemical reactions

Answers

Answer 1

Answer: They lower the activation energy, that is required for a specific process.

The enzyme works like a lock and key, where the lock is the enzyme that gets activated by a molecule the "key". Once they bind to each other the process gets started.

Without enzymes the process would have to occur entirely on it's own.

Answer 2

Answer:

Answer

By lowering energy of activation of the reaction.

Explanation

High energy produced during the metabolism of reactant to product. Due to the large free energy of activation, the speeds of uncatalyzed biochemical reactions are often exceedingly slow. Enzymes lower this energy of activation so that more molecules have adequate energy to carry into the transition state to speed up the rate of reaction.

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A boy on a bicycle is resting at the top of a hill. Then, he rides his bicycle down the hill. Describe how the boy's potential and kinetic energy differ at the top, middle, and bottom of the hill.

Answers

At the top of the hill the boy has more potential energy. In the middle he's gaining kinetic energy but losing potential energy. At the bottom he has the most kinetic energy and no potential energy at all.

Which person do you think played the most important role in the discovery of DNA structure? Rosalind or Waston and Crick? Explain your answer

Answers

Waston and Crick

Explain : Because they were awarded a Nobel prize in 1962

I hope that's help !

The body system responsible for the exchange of gases between the body and environment is the

Answers

Answer:

The Respiratory system

Explanation:

The respiratory system is composed of a group of organs (lungs, trachea, larynx, the nose, etc.)
The respiratory system has various functions in the body such as breathing, vibrating the vocal cords to produce and gaseous exchange.
When you breathe, air is taken up through the nose and mouth, to the pharynx (throat), through the larynx (where this voicebox is) and into the alveoli of the lungs where gas exchange takes place.
Gaseous exchange is where oxygen (from air) is taken up from the lungs into the bloodstream and carbon dioxide (a waste product in the body) is eliminated from the blood to the outside environent.

It is the respiratory system that allows for the exchange of gasses.

Millions of species exist today. Based on Darwin's theory of evolution, which of the following best explains how this is possible?A. Organisms pass on acquired traits to evolve into more advanced life forms.

B. Organisms are selectively bred to create new species.

C. New species are crossed with each other to form many different organisms.

D. Different genetic variations in organisms are selected in different habitats.

Answers

Charles Darwin in (1809-1882) gave the theory of evolution that was based on natural selection
Millions of species exist today. Based on Darwin's theory of evolution the best statement that explains that how it happen is

Organisms pass on acquired traits to evolve into more advanced life forms.
its because the environment chooses the one which is fittest of all and the one which is not will not survive
so correct option is A
hope it helps

Organisms pass on acquired traits to evolve into more advanced life forms. So correct option is A.

What is theory of evolution?

Charles Darwin in gave the theory of evolution in 1809-1882 that was based on natural selection which is survival of the fittest.

Based on Darwin's theory of evolution the best statement which explains that how it happen is because of the environment opted the one which is fittest of all and the one which is not will not survive or die.

For more information regarding natural selection, visit:

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Removal of phloem tissue leads to gradual death of the plant. Why does this happen?

Answers

the phloem is the tissue around the stem , which is responsible for carrying nutrients to the parts of the plat that need them . removing this tissue leads the plants to starve , and eventually die

Which career field is an applied science? geology biotechnology physics chemistry

Answers

Answer:

Option B, biotechnology

Explanation:

An applied science in an extended version of knowledge where already existing scientific knowledge is put to practical applications through the use of technology.

Biotechnology uses the knowledge obtained through biology subject and put it into uses such as genetic engineering, medicine, etc.

All three subjects geology , physics and chemistry are pure science subject that develop basic information or phenomena to understand the happenings of the natural world.

Hence, option B is correct

Biotechnology; it uses knowledge of biology (and usually incorporates several other disciplines) to make technology for biological systems (e.g. pacemakers).

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