In the "RNA world" model for the origin of life, the first protocells (probionts) relied on RNA, not DNA, for information storage and transmission. Which of the following could best be considered evidence in support of the RNA world model?

Answers

Answer 1

Today's cells contain RNA molecules that perform catalytic activity.

Translation and splicing are two biological processes that depend heavily on catalytic RNAs.

Many of these ribozymes' catalytic mechanisms are just beginning to be understood, and they demonstrate that catalysis is always carried out by RNA, whether it is acting alone or in conjunction with proteins.

Catalytically active RNA molecules are ribozymes. Ribozymes come in a variety of sizes and forms in nature. DNA has various benefits over proteins and RNA as a synthetic catalyst that has been identified through in vitro selection. Deoxyribozymes' expanding range of reactions is expanding our fundamental knowledge of biocatalysis and enabling applications in both chemistry and biology.

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Related Questions

If a strand has 10% cytosine, what percent will be adenine?

Answers

Answer:

40% of adenine is present

Explanation:

Why does the grass look green under sunlight and black under the moonlight? ( explain in the process of filtering light )

Answers

Objects absorb certain wavelengths and reflect the other. It is the color of the reflected wavelengths which imparts color to the objects. Now, grass absorbs the other colors of light and reflects green light. ... Thus grass is green.

i need help on fiding a plant that is really interesting and different and show me the picture please ​

Answers

the other comment is a scam. don't click the link. there are bots like that everywhere. anyways. i was originally going to go with a venus flytrap, but pretty much everyone knows or have at least heard about those. but the red spider lily has always been my favorite. in japan, it is a symbol of death and rebirth, and it tends to grow close to graveyards.

___ is the process the body uses to break down food

Answers

Answer:

Digestion

Explanation:

Digestion is the breakdown of large insoluble food molecules into small water-soluble food molecules so that they can be absorbed into the watery blood plasma. In certain organisms, these smaller substances are absorbed through the small intestine into the blood stream

Digestive system is the answer

Why does the sun appear brighter than the other stars in the universe

Answers

Answer:

because its closer and bigger

Explanation:

its just closer and bigger than all of the other stars

The sun is many times larger than Earth but appears small because it is very far away. Even though the sun is very far from Earth, it is much closer than other stars. Because the sun is closer to Earth than any other star, it appears much larger and brighter than any other star in the sky.

what does the anther produce?
A. ovary

B. eggs

C. pollen

Answers

Answer:

C. pollen

Explanation:

Hope this helps

what is the next step in the scientific method, following forming a hypothesis?
A. Analyzing the data
B. stating the question
C. conducting an experiment

Answers

Hi there!

The answer to this question, I believe, would be C, conducting an experiment. When you make your hypothesis, you have already stated your question, analyzed the data, and formed a logical assumption that you need to prove is true. Your hypothesis is your logical assumption; therefore, you ought to experiment and see if your assumption - your hypothesis - is correct.

Hope this helps! :)

Answer:

Conducting an experiment

Explanation:

5points on disadvantage of fungi​

Answers

Answer: Food Molds. Molds form in humid environments. ...

Poisonous Mushrooms. •••

Superficial and Subcutaneous Infections. Fungi can infiltrate the external layers of human bodies and cause itching and rashes. ...

Systemic Mycoses. ...

Affects of Fungi on Other Organisms.

Explanation:

What He Said Above Me.

PLEASE HELP ASAP
For the past 20 years, the population of the invasive Asian Carp in the Mississippi River has skyrocketed, while populations of native species have declined. Which of the following conclusions provides the best explanation for this phenomenon?

The carp out-competed the native species for food and space.
The food sources preferred by the carp increased.
The native species migrated to new areas, while the carp remained.
The native species contracted a virus that the carp were immune to.

Answers

Answer:

the carp out competed the native species for food and space.

Answer:

The carp out-competed the native species for food and space.

Explanation:

Which of the following elements are found in ALL four biomolecules? Select all of the correct answer choices.
Carbon
Helium
Hydrogen
Oxygen
Nitrogen
Phosphorous

Answers

Answer:

everything but Helium and Phosphorous

Explanation:

What statement about enzymes and pH is true?

Most enzymes require a very basic environment to function well.
Most enzymes require a very acidic environment to function well.
Enzymes require a specific range of pH values to function.
Enzymes are unaffected by changes in pH levels.

Answers

Answer:

Enzymes require a specific range of pH values to function.

Explanation:

in fact some enzymes are denatured by specific pH ranges.

Is the adaptation physical or behavioral. Humpback whales migrate north from Antarctica to breed in warmer water.

Answers

Answer:

okay so im going with a behavioural adaptation becasue if it was physical wouldnt that mean that they would change their appearance bc of there adaptation?

okie peace

Explanation:

Answer:

This adaptation is behavioral

Explanation:

Jill has a mixture of sand and iron filings. The mass of the mixture is 250 g. Jill uses a magnet to separate the two substances. Then, she measures the mass of the sand as 150 g.

What should be the mass of the iron filings?
A.
250 g
B.
It is impossible to determine.
C.
150 g
D.
100 g

Answers

Answer:

D

Explanation:

250 - 150 = 100

How is the process of protein synthesis similar to the process of programming a computer? How is it different?

Answers

Answer:

Protein synthesis is the process in which cells make proteins. It occurs in two stages: transcription and translation. ... Translation occurs at the ribosome, which consists of rRNA and proteins. In translation, the instructions in mRNA are read, and tRNA brings the correct sequence of amino acids to the ribosome.

Both the synthesis of proteins and computer programming entail a series of instructions that lead to a particular output.  While programming a computer and making proteins have some parallels, they are essentially separate activities that take place in different domains and use different tools and procedures.

What are the similarities and differences between proteins and computer programming?

Similarities between proteins and computer programming:

Protein synthesis and computer programming both involve a series of instructions that are carried out in a particular order to get the intended result.Both processes need input data to produce output, and both processes require input data.Both methods rely on a language or code that is used to specify the instructions.

Differences between proteins and computer programming:

Protein synthesis is a biological process that takes place inside of cells, whereas computer programming is a human-made activity that takes place inside of a machine.DNA and RNA are used in protein synthesis, just as a programming language is used in computer programming.Ribosomes, tRNA, and amino acids are used in protein synthesis to create proteins, whereas compilers, interpreters, and machine code are used to create programme for computers.

Therefore, both the synthesis of proteins and computer programming entail a series of instructions that lead to a particular output.

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What would be the best reason for having the lamp on during the experiment

Answers

Answer:

I'm not entirely sure what the experiment is BUT if I had to guess it would to help you see.

Explanation:

Sorry, I couldn't help it. In all reality I'm not possitive as to what the experiment is so I can't really give you a true answer besides this one

Answer!!!
True or False: Trampling of plants by animals is an example of a biotic factor.

Answers

Answer:

false

Explanation:

i am sorry if it is wrong

The trampling of plants by animals is not an example of a biotic factor, while animals and plants are examples of biotic factors. Hence, it is false.

What are biotic factors?

A living thing that alters its surroundings is referred to as a biotic factor. Examples of organisms found in a freshwater habitat include algae, fish, amphibians, and aquatic plants. A particular ecosystem is the result of the interaction of biotic and abiotic components.

A living entity that influences another organism in its ecosystem is referred to as a biotic factor. Examples include the plants and animals the organism eats as food and the animals it consumes.

The trampling of plants by animals is not a biotic factor while living organisms and plants are biotic factors. Hence, it is false.

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how and why are organisms classified according to shared characteristic​

Answers

Answer:

All living organisms are classified into groups based on very basic, shared characteristics. Organisms within each group are then further divided into smaller groups. This grouping system makes it easier for scientists to study certain groups of organisms

Explanation:

10
What complementary mRNA is made from the following DNA strand AAG-CTG-CCT *
(1 Point)
TTC-GẠC-GGA
UUC-GAC-GGA
TUC-GAC-GGA
UUC-GUC-GGA
No Answer

Answers

Answer:

a

Explanation:

What statement is correct about the polarity of a water molecule?
1.Both oxygen and hydrogen ends have partial positive charges.
2.The oxygen side has a partial negative charge and the hydrogen ends have partial positive charges.
3.Both oxygen and hydrogen ends have partial negative charges.
4.The oxygen side has a partial positive charge and the hydrogen ends have partial negative charges.

Answers

ANSWER

I HOPE IT WILL HELP U

Explanation:

Answer: The correct answer is Option B. Explanation: Polarity of a molecule arises when difference in electronegativities is present between the atoms. Water is a molecule which is formed from hydrogen and oxygen atoms.

Somebody help me with these 4 questions please

Answers

Answer:

i only know question 1 is convergent boundaries.

sorry i am not sure about the others

Explanation:

question 1 is convergent since they are sliding towards each other to form the subduction zone

CAN Someone PLS answer my question!!!!!

Answers

Explanation:

I think the answer is E(big eyeball), because big eyeball is dominant over small one
It would be small eyes.

Your genotype is correct. In this question, it looks like the dominant trait is small eyes.

Since the genotype is Ee, and the dominant trait is small eyes, your phenotype is SMALL eyes.

Hope this helps, I apologize if this is not correct.

The strongest evidence for evolution was not known in Darwin's time. It involves comparing the ______ of different species to determine how closely related they are.

Answers

DNA

PLS MAKE BRAINLEST {}

dna

Explanation:

it involves comparing how closely related they are

The human immune system detects the presence of pathogens using pattern recognition receptor molecules that bind to common components of pathogens, such as peptidoglycan polymers in cell walls and the flagellin protein of bacterial flagella, known as pathogen-associated molecular patterns, or PAMPs. These receptors are effective becauseGroup of answer choicesthey detect only human immune molecules.they result in rapid evolution of the host immune system.they recognize evolutionarily conserved molecules that are structurally essential to the various bacteria that use them.PAMPs evolve more quickly than other pathogen molecules.

Answers

Pamps evoke more when less people care about ratcoons when I took my grandpa to plants the cats ate her plants

They recognize evolutionarily conserved molecules that are structurally essential to the various bacteria that use them.

What are Pattern recognition receptor molecules?

Pattern recognition receptor molecules detect pathogen-associated molecular patterns (PAMPs), which are structurally conserved components of pathogens such as bacteria, viruses, and fungi. These molecules are essential for the survival and function of the pathogen, and are not found in the host's cells.

By recognizing PAMPs, the immune system can quickly identify and respond to a wide range of potential pathogens, without needing to recognize every individual pathogen separately. Therefore, the receptors are effective because they recognize evolutionarily conserved molecules that are structurally essential to the various bacteria that use them.

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Explain the structure of the cerebrum:

Answers

Answer: The cerebrum, also known as the forebrain, is the largest part of the brain. It is derived embryologically from the telencephalon. The cerebrum consists of two cerebral hemispheres (right and left) separated by a deep longitudinal fissure which contains the corpus callosum. The cerebrum is the largest part of the brain. It consists of the cerebral cortex and other subcortical structures. It is composed of two cerebral hemispheres that are joined together by heavy, dense bands of fibre called the corpus callosum. The largest part of the brain. It is divided into two hemispheres, or halves, called the cerebral hemispheres. Areas within the cerebrum control muscle functions and also control speech, thought, emotions, reading, writing, and learning.

Explanation:

Describe the process of how an Igneous Rock is created

Answers

Answer: Igneous rocks form when magma (molten rock) cools and crystallizes, either at volcanoes on the surface of the Earth or while the melted rock is still inside the crust. ... When lava comes out of a volcano and solidifies into extrusive igneous rock, also called volcanic, the rock cools very quickly.

A major disturbance that the ecosystem was able to recover completely from.

Answers

Hello. Your question is incomplete. However, I managed to find a question exactly like yours on the internet and managed to realize that you forgot to say that your question asks you to give an example of the statement presented above.

Answer:

A major disturbance from which the ecosystem was able to recover completely was the disease that almost wiped out all of Ireland's potato in 1840.

Explanation:

You may have heard of the Irish Potato Famine, which was a time when the Irish population lived very difficult days, after an illness that almost decimated the country's potato plantations.

The potato was the main source of food for the Irish, but in 1840, a fungus called Phytophthora infestans, managed to infect almost all potato plantations in the country, preventing the potato from being harvested and could be consumed. This created major economic and social problems in Ireland, as people suffered from hunger, poverty and the diseases that arose, which caused many Irish people to immigrate to other countries, or to die.

The fungus plagued the ecosystem for years and only started to decrease in intensity in 1850, once the ecosystem started to recover. Currently, although the pest still exists, the Irish ecosystem is completely recovered and the pest is controlled and is unable to make such an impact.

Historically, the use of wells appears in the __________.
A)
Old Stone Age
B)
New Stone Age
C)
Bronze Age
D)
Iron Age
E)
Copper Age
Historically, the use of wells appears in the __________.
A)
Old Stone Age
B)
New Stone Age
C)
Bronze Age
D)
Iron Age
E)
Copper Age

Answers

Answer:

pretty sure it's B

Explanation:

Answer:

ITS C

Explanation:

EDG

why are leaves included in experiments​

Answers

Could you specify the specific experiment? This depends on if you’re speaking in the context of leaves being tested biologically or in general.

Glycolysis that starts with glycogen instead of glucose can be considered to have a higher energy yield because:

A. Phosphorolysis reactions cleave bonds with phosphate instead of water.
B. Phosphorylase is a better enzyme than hexokinase
C. Phosphorylase produces a glucose phosphate without spending an ATP to do it
D. All of these

Answers

Answer:

A

Explanation:

The answer is a Because Phosphorolysis reactions cleave bonds with phosphate instead of water (: just trust me

Glycolysis that starts with glycogen instead of glucose can be considered to have a higher energy yield because phosphorolysis reactions cleave bonds with phosphate instead of water. The correct option is A.

What is glycolysis?

Through a sequence of processes known as glycolysis, glucose is divided into two pyruvate molecules, each of which has three carbons.

The metabolic process that changes glucose into pyruvate is known as glycolysis.

The high-energy molecules adenosine triphosphate and reduced nicotinamide adenine dinucleotide are created using the free energy released during this process. A series of ten enzyme-catalyzed processes make up glycolysis.

In contrast to phosphorolysis reactions, which cleave bonds with phosphate rather than water, glycolysis can be thought of as having a larger energy yield because it begins with glycogen rather than glucose.

Not producing adenosine 5′-triphosphate is not the primary goal of glycolysis; rather, it is to produce pyruvate for the trichloroacetic acid (TCA) cycle.

By boosting the ratio of NADH to NAD+, the glycolytic synthesis of pyruvate lowers the cytosol.

Thus, the correct option is A.

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Pls, help!! The word banks are in the pictures.

Answers

Answer:

1. life

2. microscope

3. organelles

4. tasks

5. flexible

6. covering

7. cell

8. diffusion

9. low

10. high

11. osmosis

12. thick

13. shape

14. cellulose

15. herbivores

16. nucleus

17. directions

18. parents

19. DNA

20. genes

21. powerhouse

22.

23. respiration

24. glucose

25. APT

26. vacuoles

27. storage

28. larger

29. cytoplasm

30. gel-like

31. water

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