What happens to an enzyme after it catalyzes a chemical reaction?

Answers

Answer 1

Answer:

An enzyme remains unchanged after it catalyzes a chemical reaction.

What is an enzyme?

An enzyme is a biological catalyst that regulates the rate of biochemical reactions in living systems.

Enzymes aid in the occurrence of certain reactions in the body. That is, some chemical reactions cannot occur without specific enzymes.

Enzymes act by binding their active site to the substrate. However, they remain unchanged after the reaction i.e. can be reused.

Therefore, an enzyme remains unchanged after it catalyzes a chemicalreaction.

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Answer 2

Answer: The shape of the enzyme will be changed by the presence of two or more chemical reactants. Then the enzyme catalyzes the reaction. After the reaction is catalyzed, the producet will be released. Then the enzyme will be able to relax. So this means that the enzyme is back to its normal shape and it will get ready to do it again.

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During which phase of meiosis does crossing over chromosomes occur

Answers

Answer:

Pachytene of prophase I of meiosis I

Explanation:

Crossing over is the process of exchange of genetic material between non-sister chromatids of homologous chromosomes. It occurs during the pachytene stage of prophase I of meiosis I. During pachytene, the paired homologous chromosomes exchange genetic material between themselves and add new gene combinations to the daughter cells.

phase where crossing over chromosomes occur is prophase 1

Which of these of these organisms would most likely be found at the bottom of biomass pyramid?

Answers

Producers are the organisms that is present or found at the bottom of biomass pyramid.

What organism present at the bottom of biomass pyramid?

Producers such as algae and plants are the organisms that would most likely be found at the bottom of biomass pyramid because producers are the organisms that make their own food from using the sun energy and feed other organisms present in that ecosystem.

So we can conclude that producers are the organisms that is present or found at the bottom of biomass pyramid.

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It seems as though you did not provide answer choices, but a biomass pyramid starts at the primary producers, which then moves up to primary consumers, secondary consumers, and all the way to detritivores. Primary producers are organisms like plants that convert light energy (or other energy) into biomass that other organisms can use.

Which of the following is not a reason for the lack of a fossil record from the Precambrian time? A. The single-celled organisms that existed during that time did not leave easily identifiable fossils. B. Like the rocks of the Phanerozoic eon, Precambrian rocks contain many visible signs of complex life forms. C. Multi-celled organisms evolved in the oceans during the latest years of the Precambrian time. D. Precambrian rock has been eroded or metamorphosed over billions of years, and very little of it remains at the surface.

Answers

The right answer is B

The development towards 1.4 Ga of eukaryotes, aerobic organisms such as unicellular algae, will be decisive for the oxygenation of the Earth's atmosphere.

The first multicellular organism is a red alga dating back to 1200 Ma during the Mesoproterozoic era (part of Precambrians). Various forms of life with soft bodies dated between 600 and 541 Ma constitute what is called the Vendian fauna, that is to say the fauna of the Ediacarien.

The appearance of a great diversity of small shelly fauna from 541 Ma will mark what is called the Cambrian explosion.

Investigators are studying a signaling pathway in which an RTK activates the monomeric GTPase Ras.a. True
b. False

Answers

False. Correct me if i’m wrong.

Which of the bonding examples below is NOT possible?(A) a DNA adenine to a DNA thymine
(B) a DNA adenine to an RNA thymine
(C) a DNA guanine to an RNA cytosine
(D) a DNA adenine to an RNA uracil
(E) a DNA guanine to a DNA cytosine

Answers

B is not possible. RNA contains only adenine, cytosine, guanine and Uracil instead of Thymine. The rest are correct because Adenine pairs with either uracil (RNA) or thymine (DNA) and cytosine pairs with Guanine

Can you live without your large intestine? Why or why not?

Answers

no we cannot live without our large intestine because it is the only place where waste products gets deposited, it is also responsible for excretion .

No, we cannot live without our large intestine. The large intestine is concerned with the absorption of water and it is from where proper excretion occurs. If there is no large intestine, then we may have to suffer with excretory products ( faeces ) in our blood which will hamper our co-ordination.

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