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What triggers each step in the synthesis of tryptophan?

Each step is triggered by a specifi c enzyme. The tryptophan operon contains fi ve genes (trpA through trpE) needed to make the amino acid tryptophan. When tryptophan levels are low, RNA polymerase binds to the operator, turning on the transcription of the fi ve enzyme genes needed for tryptophan synthesis.

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Each process is started by a unique enzyme. The five genes (trpA through trpE) of the tryptophan operon are required to produce the amino acid tryptophan.

The five enzyme genes required for tryptophan production are turned on by the binding of RNA polymerase to the operator when tryptophan levels are low.

Due to this, the cell either stops further synthesis or binds to a repressor, which induces the creation of the enzymes needed for its manufacture and synthesis.

When tryptophan levels are low, the trp operon is expressed (or "turned on"), and when levels are high, it is repressed (or "shut off"). The trp repressor prevents the operon from being expressed when it is linked to tryptophan.

Therefore, (trpA through trpE) of the tryptophan operon is required to produce the amino acid tryptophan.

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Answer:

Eukaryotic cells are plants, animals, protists, fungi. Their genetic material is organized in chromosomes. Golgi apparatus, Mitochondria, Ribosomes, Nucleus are parts of Eukaryotic Cells.

Animals such as cats and dogs have eukaryotic cells.

Plants such as apple trees have eukaryotic cells.

Fungi such as mushrooms have eukaryotic cells.

Protists such as amoeba and paramecium have eukaryotic cells.

Insects have eukaryotic cells.

Humans are composed entirely of eukaryotic cells. Related Links: Examples.

Explanation:

Bacterial strains, especially Actinomycetes have been used in biotech production and drug discovery for years. Genetic methods now open the field of combinatorial biosynthesis that has improved impressingly in the past couple of years. Also, the productivity of yeast and other fungi in a variety of different processes has improved significantly since genetic methods have been introduced. In addition, a number of recent works considerably widens the potential of plant biotechnology. This review covers examples describing the use of prokaryotic cells and plant cells in biotech production.

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Bacterial strains such as Actinomycetes have been used in biotech production and drug discovery for years.

Biotechnology is defined as the integration of natural sciences and engineering sciences to achieve the application of organisms, cells, their parts and molecular analogs to products and services.

It is described as the technology that uses biological systems, living organisms or parts thereof to develop or create various products such as brewing and baking bread are examples of processes that fall under the concept of biotechnology where the use of yeast i.e. living organism to prepare the desired product, bacterial strains such as Actinomycetes for making drug etc.

The most important area of biotechnology is the production of therapeutic proteins and other drugs through genetic engineering.

Thus, Bacterial strains such as Actinomycetes have been used in biotech production and drug discovery for years.

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Answer:

Sprouting is the natural process by which seeds or spores germinate and put out shoots, and already established plants produce new leaves or buds or other newly developing parts experience further growth.

Answer:

35. A. homologous structure

36. B. analogous structure

37. B. analogous structure

38. C. vestigial structure

39. B. analogous structure

Explanation:

A homologous structure is a similar structure/trait found in different species because they diverged (evolved) from a common ancestor, i.e., these species share a common ancestor that had the homologous structure/trait. A homologous structure may have the same or different functions in the descendants. Conversely, an analogous structure is a similar structure/trait that evolved independently (i.e., by convergent evolution) in different species to have the same function, thereby these species don't share a common ancestor with the trait. Finally, a vestigial structure is a rudimentary biological structure found in an organism that has lost its original/ancestral function (e.g., the appendix in humans or the hindlimbs of the snake). Vestigial structures provide strong evidence for evolution by use/disuse of body parts.

Homologous and Analogous structures differentiate in origin and function. Vestigial structures have lost their function. A) Homologous, B) analogous, C) analogous, D) vestigial, E) analogous.

Homologous characters are the structures of different organisms that,

These structures might express some variations between the organisms that might be related to their function and to the environment. Their function is not necessarily the same in all the organisms involved.

These homologous characters are present in organisms related that share a common ancestor.

Analogous structures are those body parts of different organisms that accomplish the same function, but they are originated from different areas. These structures do not share the same origin.

Vestigial structures are those body parts, genetically determined, that have been retained during the evolution of the taxonomic group but have lost or reduced their original function.

Such vestigial structures were plenty functional in the ancestors of new species, but now are typically degenerate, stunted, or rudimentary, and tend to be much more variable than homologous non-vestigial parts.

According to these definitions, we can answer the questions.

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Answer:

involuntary muscle

Explanation:

The heart has 4 different lobes with two on each side and arteries connecting both sides. The heart is made of bones and involuntary muscle. This is the reason why the heart is able to make beats. The answer is involuntary muscle.

Answer:

C) A new species can form.

Explanation:

This is the concept of genetic drift, where a species being isolated gets an unnatural change in the gene pool, and thus can evolve differently.

Answer:

D. Homeostasis

Explanation:

The ability of our bodies to maintain internal stability is called: Homeostasis

Answer:

Whales are mammals that need air from the sea's surface to survive. Whales are capable of giving birth to live young. Fish have gills and use them to draw oxygen from the water. The majority of fish lay eggs. Whales and other marine animals with horizontal tail fins, such as dolphins, have vertical tail fins, while fish have vertical tail fins.

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Answer:

a.burning of fossil fuels

Answer:

b.production of glucose

Answer:

All of the above

Explanation:

Protein is especially important to consume after a workout, as during exercise you are effectively breaking your muscles down. That is why it's common to see people at the gym eating protein bars or drinking whey shakes when they have finished their routine. It helps to increase the impact of their exercise.

Excess protein consumed is usually stored as fat, while the surplus of amino acids is excreted. This can lead to weight gain over time, especially if you consume too many calories while trying to increase your protein intake

Some high-protein diets include foods such as red meat and full-fat dairy products, which may increase your risk of heart disease. A high-protein diet may worsen kidney function in people with kidney disease because your body may have trouble eliminating all the waste products of protein metabolism.

Answer: its B or D

Explanation: ihope this helps

Explanation:

Carbon dioxide (CO2) is the primary greenhouse gas emitted through human activities

Answer:

B. Most aquatic animal bites result from an animal's defensive response to a perceived threat or, on rare occasions, from a case of mistaken identify.

Explanation:

Answer:

75%

Explanation:

If you drew a Punnett Square, you will see that the possible outcomes would be AA, Aa, aA, and aa. Three out of the four would exhibit the dominant trait.

Answer:

Mitosis creates more diploid cells by copying each chromosome and moves it to the other side of the cell.

Explanation:

This lets the cell get divided straight down the middle.

Answer: Such similarity is the result of CONVERGENT EVOLUTION

Explanation:

Evolution can be defined as the theory that was developed based on the findings of scientists that living organisms are descended from a common ancestor.

The current theory of the process of evolution makes use of present day knowledge of genes and chromosomes to explain the source of genetic variation upon which natural selection works. It postulates that although natural selection is the only force that regularly produces adaptive evolutionary change, other forces too play a part in evolution.

Evolutionary changes may show the following patterns:

--> one species gradually transform into another species.

--> one or more species evolve as offshoots of a single ancestral species to fill a wide variety of habitat. This is known as divergent evolution.

--> Many superficially similar looking species arise from different ancestral species. This is known as CONVERGENT EVOLUTION. It is shown by organisms occupying very similar kinds of environment. That is why a porpoise and a shark seem closely related, but they are not.

Answer:

I believe the answer is A. An organ system supports all parts of the organism.

Explanation:

This answer makes the most sense to me.

[tex]\sf\purple{Photosynthesis}[/tex] is a process by which phototrophs convert light energy into chemical energy.

The word “photosynthesis” is derived from the Greek words "phos" (which means “[tex]\sf\pink{light}[/tex]”) and "σύνθ-εóîς" (which means “[tex]\sf\red{combining\:together}[/tex] .”) And so it means “combining together with the help of light.”

The process of photosynthesis occurs in green plants (the primary producers in a food chain) and a few other autotrophic organisms such as cyanobacteria, purple bacteria and green sulfur bacteria.

Following is the photosynthesis formula:

6 CO2 + 6 H2O —> C6 H12 O6 ([tex]\sf\blue{glucose}[/tex]) + 6 O2 ([tex]\sf\pink{oxygen}[/tex]).

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Answer:

the process by which green plants and some other organisms use sunlight to synthesize nutrition form carbon dioxide and water.

Answer:

Explanation:

hydrosphere

2

since hydro means water btw

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Answer:

C. North-East

Explanation:

North" (and any subsequent words) was ignored because we limit queries to 32 words.

Answer:

Explanation:it needs to be able to store water long periods of time

Answer:

13000 would be avalable because 10% is taken every time it is eaten so 65,000 with 10% taken out twice (20% of 65,000) is only 13,000 kcal available to the secondary consumers.