Question: Why Are Clay Surfaces Good At Promoting The Formation Of Biological Polymers?

Organic molecules can form in space and survive the passage through the Earth’s atmosphere. Why are clay surfaces good at promoting the formation of biological polymers? B. They bring monomers close together, allowing them to react with each other.

What role are clays thought to have played in the early formation of complex life?

It was Bernal (1951), however, who first suggested that clay minerals played a key role in chemical evolution and the origins of life because of their ability to take up, protect (against ultraviolet radiation), concentrate, and catalyze the polymerization of, organic molecules [3].

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What was one reason that RNA was eventually replaced by DNA as the molecule of choice for storing genetic information?

DNA is likely to have been a late addition: as the accumulation of additional protein catalysts allowed more efficient and complex cells to evolve, the DNA double helix replaced RNA as a more stable molecule for storing the increased amounts of genetic information required by such cells.

Why have studies of the geological record not enable us to determine how life on Earth originated?

Why have studies of the geological record not enabled us to determine how life on Earth originated? There have been several mass extinctions in Earth’s history.

When were the key ingredients for life first present on Earth quizlet?

Prokaryotes were the Earth’s first living organisms, the only organisms living on Earth from about 3.5 billion years ago to about 2.1 billion years ago.

How could have clay helped forming the first biomolecules?

Previous research has shown that clays act as catalysts for the formation of polymer molecules such as the precursors of proteins and DNA. They can also encourage lipid molecules to arrange themselves into cell-like compartments called vesicles.

What is clay material?

Clay is a type of fine-grained natural soil material containing clay minerals. Clays develop plasticity when wet, due to a molecular film of water surrounding the clay particles, but become hard, brittle and non–plastic upon drying or firing. Clay is the oldest known ceramic material.

Why are clay surfaces good at promoting the formation of complex organic molecules quizlet?

Organic molecules can form in space and survive the passage through the Earth’s atmosphere. Why are clay surfaces good at promoting the formation of biological polymers? B. They bring monomers close together, allowing them to react with each other.

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What is responsible for the increased stability of DNA compared to RNA?

What is responsible for the increased stability of DNA compared to RNA? DNA is a more stable molecule than RNA because it lacks a hydroxyl group on the 2′ carbon and is therefore more resistant to cleavage, and because the two sugar-phosphate backbones are held together by many hydrogen bonds between nitrogenous bases.

What are the advantages to having DNA RNA and protein compared to only RNA?

With the exception of certain viruses, DNA rather than RNA carries the hereditary genetic code in all biological life on Earth. DNA is both more resilient and more easily repaired than RNA. As a result, DNA serves as a more stable carrier of the genetic information that is essential to survival and reproduction.

How fossils help us understand the past?

Fossils give us information about how animals and plants lived in the past. By studying the fossil record we can tell how long life has existed on Earth, and how different plants and animals are related to each other.

How can Geologists use rocks and fossils to learn how the Earth’s environments have changed?

The Law of Fossil Succession is very important to geologists who need to know the ages of the rocks they are studying. The fossils present in a rock exposure or in a core hole can be used to determine the ages of rocks very precisely. Similarly, fossil animals and plants from different environments are different.

What are the 3 main ingredients necessary for life to exist?

This video excerpt from NOVA explains what astrobiologists consider to be the three basic ingredients of life— water, organic compounds, and energy. Although Earth has water and energy, scientists are trying to learn how organic molecules got to our planet.

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Which element that is important to life was lacking from Earth’s early atmosphere?

Earth’s original atmosphere was rich in methane, ammonia, water vapour, and the noble gas neon, but it lacked free oxygen.

What is the first evidence that life evolved on Earth quizlet?

Stromatolites became abundant and widespread. What is the first evidence that life evolved on Earth? The appearance of stromatolites in the fossil record. The appear of large Eukaryotic cells.

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