Hello!
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.
Ary~
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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.
What is a synthesis of 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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One of your team members suggested harvesting crops to supply food resources for the future Martians. Would this be a feasible suggestion? What factors need to be considered in order to have a thriving agricultural life on the red planet?
Answer:
Yes.
Explanation:
Yes, it s a feasible suggestion by harvesting crops to supply food resources for the future Martians if the environmental conditions are suitable. Suitable temperature, humidity, water requirement and optimum amount of light are the factors need to be considered in order to have prosperous agriculture on the red planet. If these factors are available in optimum range so we are able to grow crops for the Martians to survive.
b) Fungi and bacteria are microorganisms that are important to the
economy of the country. Food and agriculture industries depend a
lot on both these organisms. Discuss how these organisms can
help to improve the economy of the country now.
Answer:
Well fungi and trees have a mutual relationship that the tree gives the fungi what it wants and in return the fungi gives the tree food and energy. So fungi can help more trees to make more trees to help the environment. Bacteria usually eat dead things so to get rid of living waste(animals, wood, etc)
Explanation:
PLEASE HELP!!!! You are a scientist tasked with writing a journal article on the evolution of alligators. In 3–5 sentences, describe the different forms of evidence you might use to analyze the evolution of alligators.
Answer:
The first alligator ancestors evolved about 245 million years ago.
Explanation:
The first alligator ancestors evolved about 245 million years ago due to change in the environmental condition. crocodilians appeared about 80 million years ago during the Cretaceous period. Modern alligators has experience less changes which is closely related to their ancient ancestors and look much like to their relatives that exists about 80 million years ago. The main reason for the change in the body structure of alligator is due to change in environmental condition.
The evolution of alligators can be analyzed by sequencing samples of different species and then producing a bioinformatic analysis.
What is evolution?Evolution means descendence with some class of modification in offspring (phenotypic, genetic, etc).
Evolution can be analyzed by sequencing and comparing the linear order of nucleotide sequences between different species.In conclusion, the evolution of alligators can be analyzed by sequencing samples of different species and then producing a bioinformatic analysis.
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are males more likely to have hypophosphatemia than females explain
Answer:
Males are more likely to have hypophosphatemia.
Explanation:
In females, a mutation would have to happen in both copies of the genes to cause the disorder. It is rare having females with 2 altered copies of this gene. Males are X-linked by recessive disorders much more frequently then females.
Describe the composition of the mitochondrial membrane and compare that with the composition of a eukaryotic cell membrane. What are the functions of cell membranes
Answer:
Biological energy conversion in mitochondria is carried out by the membrane protein complexes of the respiratory chain and the mitochondrial ATP synthase in the inner membrane cristae. Recent advances in electron cryomicroscopy have made possible new insights into the structural and functional arrangement of these complexes in the membrane, and how they change with age. This review places these advances in the context of what is already known, and discusses the fundamental questions that remain open but can now be approached.
Mitochondria are the powerhouses of the cell. In all eukaryotes that do not depend on photosynthesis, the mitochondria are the main source of adenosine triphosphate (ATP), the energy-rich compound that drives fundamental cell functions. These functions include force generation (for example, in muscle contraction and cell division), the biosynthesis, folding and degradation of proteins, and the generation and maintenance of membrane potentials. ATP is produced on a massive scale in the human body, amounting to 50 kg per day in a healthy adult, but considerably more in a long-distance runner. ATP is generated by the mitochondrial ATP synthase from ADP and phosphate ions. These are the products of ATP hydrolysis at the sites where energy is needed in the cell. Apart from cellular respiration and ATP synthesis, mitochondria have numerous other essential functions, including the production of NADH and GTP in the citric acid cycle, the biosynthesis of amino acids, heme groups and iron-sulfur clusters or the synthesis of phospholipids for membrane biogenesis. They also act in calcium signaling [1], stress responses [2] and generally as cellular signaling hubs [3]. Not surprisingly, mitochondria play a fundamental role in human health. Mitochondrial dysfunction is the cause of severe, often maternally inherited diseases. Moreover, mitochondria are deeply implicated in apoptosis and ageing [4].
In many respects, mitochondria resemble α-proteobacteria, from which they are thought to have originated by endocytosis some 1.6 billion years ago. The most striking evidence of this evolutionary relationship is the close homology of bacterial and mitochondrial respiratory chain complexes. Mitochondria have their own genetic system, which uses a distinct DNA code that differs both from that of their bacterial ancestors and their eukaryotic hosts [5]. They have their own protein translation machinery, complete with ribosomes, tRNAs and associated protein factors that more or less resemble those of their bacterial ancestors. Very recently, the first high-resolution structure of a mitochondrial ribosome, determined by single-particle electron cryomicroscopy (cryo-EM), has revealed a fascinating patchwork of similarities to and differences from bacterial ribosomes [6]. Nevertheless, mitochondria make surprisingly little use of their specialized protein production machinery. In the course of evolution they have transferred up to 99 % of their genes to the nucleus. Today, the vast majority of mitochondrial proteins are produced in the cytoplasm and imported into the organelle by an elaborate set of protein translocases [7]. In humans, only 13 mitochondrial proteins are organelle-encoded, all of them central, hydrophobic subunits of respiratory chain complexes or of the ATP synthase.
Mitochondria are highly dynamic [8]. In the cell, they form a tubular network that constantly changes by division and fusion (Additional file 1). Both processes are accomplished by multi-component molecular machineries that include a number of dynamin-related GTPases [9, 10]. When mitochondria are isolated from cells, the network breaks up into fragments that spontaneously reseal. Isolated mitochondria are fully competent for respiration and ATP synthesis [11]. They maintain their membrane composition, organization and membrane potential, as well as the ability to fuse [12] and to import proteins [7]. We owe much of what we know about mitochondria and how they work at the molecular level to in vitro studies with isolated mitochondria, or even mitochondrial membrane fractions, which still carry out oxidative phosphorylation and ATP synthesis [13].
The composition of mitochondrial membrane consists of several proteins and phospholipids.
The major phospholipids in the mitochondrial membranes are phosphatidylcholine (PC), phosphatidylethanolamine (PE), phosphatidylinositol (PI), phosphatidylserine (PS), and phosphatidic acid (PA), as in cell membrane.Phosphatidylglycerol (PG) and cardiolipin (CL), are exclusively components of mitochondrial membrane.The composition of a eukaryotic cell membrane comprises of phospholipids, proteins, carbohydrates and cholesterol or sterols.
What is a cell membrane ?
The cell membrane is a biological membrane that separates the interior of all cells from the outside environment and protects the cell from its environment.
The eukaryotic cell membrane is a bilayer of phospholipids which is semi-permeable in nature. The mitochondria is a double membranous structure, in which the inner membrane is of crucial importance. It is highly semi-permeable (unlike the outer membrane) and consists of various proteins that are involved in the oxidative phosphorylation.To know more about cell membrane here
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what body system does the digestive system work with?
Answer:
The digestive system, the circulatory system, and the muscular system work together and process and obtain nutrients from food. The skeletal system, the endocrine system, and the lymphatic system also work with the digestive system and process those nutrients.
Explanation:
A scientist is studying gene expression in a prokaryote. Which of the following organisms could the scientist be
studying?
A.
B.
Bacillus subtilis, a bacterium
Leucobryum glaucum, a moss
Lycoperdon pyriforme, a fungus
Caenorhabditis elegans, a roundworm
c.
D.
"Survival of the fittest" best means that an organism is
answers
1.the one that can best survive in the environment
2.the one that is the biggest in the environment
3the one that is the strongest in the environment
4the one that is the fastest in the environment
Answer:
The answer is 1
Explanation:
Immunological memory accounts for: Group of answer choices the observation that some strains of the pathogen that causes dengue fever cause more severe disease than others the ancient observation that someone who had recovered from the plague could safely care for those newly diseased the human body's ability to distinguish self from non-self the ability of a helper T cell to signal B cells via cytokines
Answer:
The correct answer is - the ancient observation that someone who had recovered from the plague could safely care for those newly diseased.
Explanation:
Immunological memory is the ability of the body to recognize or identify and kill or remove the antigen, very quickly and faster, the body has previously encountered and developed an immunological response.
These memories are developed due to memory B cells or, memory CD8+ T cells and memory CD4+ cells developed by the first-time immune response. If someone who had recovered from the plague must have developed memory cells for the antigen and safer than those newly diseased.
Define y desarrolla los siguientes términos en tu libreta (escribe sus variantes)
CÉLULAS
NUTRICIÓN
REPRODUCCIÓN
RESPIRACIÓN
ADAPTACIÓN
Elige un ser vivo y desarrolla sus características comunes con el resto de los seres vivos (formado por células, nutrición, reproducción, respiración, adaptación)
Answer:
- Célula >> unidad básica y funcional de todos los seres vivos
- Nutrición >> proceso de toma de nutrientes del medio ambiente
- Reproducción >> proceso de replicación con el fin de perpetuar la especie
- Respiración >> proceso de intercambio gaseoso en organismos superiores
- Adaptación >> mecanismo por el cual los organismos se ajustan a su ambiente
Explanation:
Un mamífero (por ejemplo, un perro) es un organismo multicelular compuesto por diferentes tipos de células especializadas las cuales se asocian para formar tejidos, que a su vez se asocian para formar órganos y finalmente sistemas de órganos. El sistema respiratorio está compuesto por las vías aéreas y los pulmones. Durante el proceso de respiración se produce el intercambio gaseoso de oxígeno (O2) y dióxido de carbono (CO2) entre los pulmones y la sangre. El oxígeno obtenido mediante la inspiración pasa de los alvéolos pulmonares a la sangre para llegar a cada célula del cuerpo, mientras que en cada expiración se elimina dióxido de carbono en el sentido inverso. La nutrición es el proceso de toma de nutrientes mediante el cual el organismo obtiene energía y materia de su ambiente. Durante este proceso, el sistema digestivo incorpora alimentos que posteriormente son descompuestos en moléculas simples conocidas como nutrientes las cuales son absorbidas para finalmente pasar a la sangre y así llegar a cada célula del cuerpo. La reproducción consiste en el mecanismo mediante el cual una especie se asegura su continuidad a través del tiempo. Los órganos reproductores masculino y femenino están encargados de producir células sexuales, es decir, gametos masculinos (espermatozoides) y gametos femeninos (óvulos) que se unen durante el proceso de fertilización para dar lugar a un cigoto que se desarrollará hasta formar un organismo adulto. Finalmente, la adaptación se refiere al mecanismo por el cual un organismo se ajusta a su ambiente. A nivel de especie, la adaptación es una consecuencia del proceso evolutivo por el cual aquellos organismos que se ajustan mejor a su ambiente tienen más chances de sobrevivir y reproducirse, teniendo por lo tanto más chances de transmitir sus genes a la siguiente generación.
what drives the flow of water to move from the ocean to the atmosphere?? is it
a. earth's gravity driving the flow of liquid water
b. heat energy
c. light energy
d. matter flowing into the ocean
e. earth's gravity driving the flow of matter and energy
Answer:
b. heat energy
Explanation:
Water, which is able to exist in three different states moves from one form to another. Water can move from the ocean to the atmosphere via a process called EVAPORATION. During the process of evaporation, the sun plays a major role by supplying the HEAT ENERGY required to change water from its liquid form in the ocean to its gaseous form in the atmosphere.
Water cycle of the earth helps ensure that water is not lost in any of its forms. Liquid water stored in the ocean gets evaporated as a result of heat energy into the atmosphere as water vapour.
Helppppppppppppppppppp I’ll mark you brainlist
Answer:
photosynthesis
Explanation:
PLS HELP I’LL GIVE BRAINIEST
Answer:
SEE BELOW
Explanation:
1) DNA: CCA TAG CAC GTA CAA CGT GAA AGG TAA
mRNA: GGU AUC GUG CAU GUU GCA CUU UCC AUU
AMINO: Gly lle Val His Val Ala Leu Ser lle
2) DNA: CCG TAG CAT GTT ACA ACG CGA AGG CAC
mRNA: GGC AUC GUA CAA UGU UGC GCU UCC GUG
AMINO: Gly lle Val Gln Cys Cys Ala Phe Val
Why might the expression of a transgene be especially abnormal in vertebrates with larger average size of genes and amount of heterochromatin in their genomes?
Answer:
position effect
Explanation:
Position effect refers to the consequences on the expression of a gene/transgene when it is inserted into a new genomic location, thereby explaining how transgene's behavior is affected by its genomic location. The differences in expression of the inserted gene/transgene are generally due to its proximity to regulatory sequences (e.g., enhancers). Species with larger genomes have many genes as well as long intergenic regions where heterochromatin may spread stochastically (randomly) in order to switch on/off the gene expression, thereby resulting in unstable phenotypes.
PLEASE ANSWER ALL
question 3
Predation (hunting) is a positive benefit to the population of prey organisms because it tends to keep:
A. population low
B. Population high
___________________
question 4
An animal that eats only plants is a:
A. primary consumer
B. secondary consumer
C. tertiary consumer
D. primary consumer
____________________
question 5
An example of a producer is:
A. fungus
B. caterpillar
C. bird
D. water lily
_____________________
question 6
Which of the following is an example of an ecosystem?:
A. air, water, grass, mouse, and badgers
B. air, water, sunlight, soil
C. hawks, mouse, badgers, and eagles
D. grass, trees, bushes, and flowers
____________________
question 7
All the following are examples of limiting factors for a population EXCEPT:
A. space
B. food
C. time
D. weather
______________________
question 8
An example of a biotic resource in a forest ecosystem is:
A. waterfall
B. tree
C. cliff
D. rock
_____________________
question 9
The source of energy for almost all life on earth is:
A. sunlight
B. fungi
C. water
D. animals
______________________
question 10
In an energy pyramid , the lowest level has:
A. less energy than the top level
B. less energy than the second level
C. more energy than the top level
D. the same amount of energy is available to a consumer
What material is often used as ground cover for strawberries?
A. bricks
B. straw
C. wood mulch
D. grass clippings
PLEASE HELP!!
Question 1:Witch one is an example of evidence for evolution?
1: Monkeys to Human
2: Skeletal anatomy
3: Eating habits
Question 2: What is homeostasis?
1: Desire of an entity to remain in a balanced state of resist.change.
2: Desire of a entity to eat food
3: Desire of a entity to adapt to surroundings.
Question 3: Which one of these is NOT an example of natural selection?
1: darker colored mice becoming more prevalent in an area after a volcano flow.
2: Elk having smaller horns attributed to hunting for Elk with larger horns.
3: Squirrels moving into a new area because of a fire
Question 4:True or False - Frogs having webbed fingers and toes is an adaptation.
Answer:s
Q1. Skeletal anatomy
Q2. Desire of an entity to remain in a balanced state of resist.change.
Q3. Elk having smaller horns attributed to hunting for Elk with larger horns.
Q4. True
Hope this helps and good luck!
A large region that has a particular type of climate that effectively influences the types of plants and animals that inhabit each ecosystem is
Answer:
envromet which plants organsims human bigse are living
Suggest two reasons why more of our fish are supplied by fish farming rather than from traditional
fishing
Answer:
Due suitable environment and high productivity.
Explanation:
More fish are supplied by fish farming rather than from traditional because farms are build in order to harvest more fish by providing suitable environment to the fish. In transitional ways, fish are caught in nets from the rivers by local people for theirselves and the extra will sold in the market. In rivers there are less number of fish which does not meet the requirements of people so that's why commercial farming of fish can be done.
Which of the following is not one of the seven primary odors humans recognize?
fresh
putrid
pungent
roses
Answer:
roses
Explanation:
It occurs when an odor binds to a receptor within the nasal cavity, transmitting a signal through the olfactory system.2 Glomeruli aggregate signals from these receptors and transmit them to the olfactory bulb, where the sensory input will start to interact with parts of the brain responsible for smell identification, memory, and emotion.3
There are many different causes for alteration, lack, or disturbance to a normal sense of smell, and can include damage to the nose or smell receptors, or central problems affecting the brain. Some causes include upper respiratory infections, traumatic brain injury, and neurodegenerative disease.
Answer:
Fresh
Explanation:
When you look at the chartr, Roses were cconsidered a floral scent, which was listed, then there was putrid, pungent, and 3 others, the only one that wasn't listed was fresh, because often out scent and taste work together to help us find rotten foods, but we find that by smelling putrid scents or pungent scents, rather than fresh scents. Therefor the correct response is fresh
3. The image is a model of a
Explanation:
Image-based modeling refers to the process of using two-dimensional images to create three-dimensional models. These models often consist of a geometric shape and a texture map defined over this shape.
helpppp omg gdkdnfjf
Answer:
there is no question. we have nothing to work with besides a graph and a cut-off sentence.
Explanation:
wat is the solid state of amoba is called
1) plasmasol
2) plasmamoboid
3) plasmagle
4) pseudopodia
Answer:
It's 4
Explanation:
I believe 4
Sorry if I am wrong.
Can you please help me?
Describe the connection between limiting factors and invasive species
Answer:
Invasive species consume limited resources and become competitor of native species in a given ecosystem
Explanation:
Invasive species are the outsider species introduced in any given ecosystem. These invasive species become a competitor with the native species of that ecosystem for limited resources and hence deplete the limited resources at a faster pace thereby leaving all other species at the risk of dying.
What are cell jobs? I need it for classes. I'm also genuinely curious!
what is the dominant phase in the life cycle of an angiosperm ?
Answer:
Angiosperms are vascular plants, and all vascular plants have a life cycle in which the sporophyte phase (vegetative body) is the dominant phase and the gametophyte phase remains diminutive.
Explanation:
I hope it's help u
Angiosperms are vascular plants, and all vascular plants have a life cycle in which the sporophyte phase (vegetative body) is the dominant phase and the gametophyte phase remains diminutive.
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b) Which type of wolf is selected for in this new ecosystem? (3 points)
Answer:
Predator in predation class
Which terrestrial planet is cold, has a small atmosphere, and is known for having violent storms for weeks?
Answer
Neptune is the coldest planet
Explanation:
its true
Answer:
neptune
Explanation:
neptune has the most violent storms, is cold, and has a pretty small atmosphere compared to other planets
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How are organelles and cells related?
Answer:
An organelle is a subcellular structure that has one or more specific jobs to perform in the cell, much like an organ does in the body. Among the more important cell organelles are the nuclei, which store genetic information; mitochondria, which produce chemical energy; and ribosomes, which assemble proteins.
Explanation:
organelles membrane bound structure found within a cell......
bound in a double layer of phospholipids to insulate their little compartments within the larger cells just as a celll