why is the regulation of the lac operon important in bacteria? question options: there is a energy benefit to expressing lac operon genes when glucose is present there is no energy benefit to expressing lac operon genes when lactose is absent there is no energy cost to expressing lac operon genes so the operon is always on lactose cannot be made by bacteria unless the genes are all turned on lactose is needed to repress gene expression so the cells metabolize other carbon sources
Answers
The regulation of lac operon in bacteria is necessary because option E: lactose is needed to repress gene expression, so the cells metabolize other carbon sources.
In order for bacteria to utilize lactose as an energy source when glucose is not available, the lac operon must be properly regulated. Genes that code for proteins required for lactose metabolism can be found in the lac operon. A repressor protein that attaches to the operator and stops RNA polymerase from transcribing the structural genes regulates the expression of these genes.
Lactose deactivates the repressor, enabling RNA polymerase to carry out the transcription of the genes. When glucose levels are low, the catabolite activator protein (CAP) attaches to a location upstream of the promoter area and increases transcription. Additionally, the lac operon experiences attenuation, a mechanism that enables precise control of gene expression.
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Correct question:
Why is the regulation of the lac operon important in bacteria? question options:
there is a energy benefit to expressing lac operon genes when glucose is present
there is no energy benefit to expressing lac operon genes when lactose is absent
there is no energy cost to expressing lac operon genes so the operon is always on
lactose cannot be made by bacteria unless the genes are all turned on
lactose is needed to repress gene expression so the cells metabolize other carbon sources.
Related Questions
In your own words, what drives the formation of tropical storms?
Answers
A source of warm, humid air that comes from tropical oceans, when the average sea surface temperature is higher than 26 °C.
What are the factor favors the tropical storms?As different breezes come together close to the ocean's surface, air rises and storm clouds are formed.
There must be warm ocean water and wet, humid air in the area for one to form.
Humid air is discharged from the atmosphere and turns into storm clouds when it flows upward in a zone of low pressure over warm ocean water. In a storm, the air rotates as it rises.
Therefore, warm ocean water and wet, humid air in the area for one to form tropical storms.
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what is the history of policing until present day
Answers
Answer:
In London, On September 29, 1829.
Explanation:
The history of policing started On September 29, 1829, when the government of Britain established Metropolitan Police Service in London which was the world's first modern and professional police force. The government established this police service in order to control crimes and protect the people from criminals. After Britain every country in the world established a police department in order to control crimes in their countries.
The fossil remains of Mesosaurus showed that (1 point)
O plate tectonics is a valid earth science theory.
O the Mesosaurus is now extinct..
O plants lived in different climates long ago in Africa and South America.
O South America and Africa might have been joined in the past.
Please answer, I need help with this one
Answers
The fossil remains of Mesosaurus showed that plate tectonics is valid earth science theory.
Due to the discovery of Mesosaurus bones in the Whitehill Formation in southern Africa, as well as the Melo Formation in Uruguay and the Irati Formation in Brazil, two geographically distinct areas, Mesosaurus was essential in supplying evidence for the notion of continental drift.
They also were evidence that proved that earlier South America and Africa must have joined during that era.
What is plate tectonics?
According to the scientific hypothesis of plate tectonics, the underground movements of the Earth create the primary landforms. By explaining a wide range of phenomena, including as mountain-building events, volcanoes, and earthquakes, the theory, which became firmly established in the 1960s, revolutionized the earth sciences.
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A plant or animal that carries a disease or parasite during part of its life cycle is called a(n):
Answers
Answer:
it could probably be host
Answer:
A plant or animal that carries disease or parasite during part of its life cycle is called a host
I HOPE IT HELPS ❤❤a base insertion or deletion in the translated region of the gene may lead to
Answers
A base insertion or deletion in the translated region of the gene may lead to a frameshift mutation.
A frameshift mutation occurs when the addition or removal of one or more nucleotide bases in the translated region of a gene causes a shift in the reading frame. This shift changes the way the genetic code is read, potentially leading to the production of a nonfunctional protein or premature termination of translation.
Frameshift mutations can have significant effects on an organism, as they often result in drastic changes to the protein being produced. These mutations can lead to a range of consequences, from genetic diseases to changes in an organism's traits. However, the specific outcome of a frameshift mutation depends on the location of the mutation within the gene, the specific base(s) inserted or deleted, and the organism's overall genetic makeup.
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Please help me I need this by tomorrow
Answers
lizards also thermoregulate and, as in humans, thermoregulation in lizards involves negative feedback. lizards, however, are ectotherms and gain most of their heat from external sources. therefore, they often use behavioral mechanisms to adjust their body temperature. for example, if a lizard's body temperature drops below its normal range, the lizard may seek a sunny resting spot to warm up. what are the stimulus and the response in this example? drag the phrases on the left to complete the sentence on the right. not all phrases will be used.
Answers
The behavior of looking for a sunny area is the response to the stimulus of decreased body temperature.
What physiological reaction occurs in many animals when they become too hot?Water from the skin, mouth, and nose of land animals is frequently lost to evaporation into the atmosphere. Evaporation can serve as a cooling technique by removing heat. For instance, many mammals have the ability to improve evaporative cooling in response to high body temperatures by triggering systems like sweating and panting.
How does the body temperature of lizards fluctuate?Many ectotherms move to warmer or cooler areas of their surroundings to control their body temperatures. For example, in order to maintain their body temperatures within a certain range, lizards and snakes alternate between lazing in the sun and resting in the shade.
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What are egg laying animals called
Answers
Answer:
Oviparous animals is ur ans
Explanation:
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Which of the following explanations best describes how mass is
conserved in the process above?
A.Matter is consumed and used by individual cells to grow
following mitosis
B.Matter is consumed and used by individual cells to grow
following meiosis
C.Matter is created by individual cells to grow following mitosis
D.Matter is created by individual cells to grow following meiosis
Answers
Following mitosis, each individual cell uses matter to grow. Individual cells produce matter to expand after mitosis.
How does photosynthesis maintain mass?Six carbon atoms, twelve hydrogen atoms, and eighteen oxygen atoms are reorganized in this process from one configuration in the reactants to another configuration in the products using the energy of the sun. Because the same atoms are present on both sides of the reaction, mass is conserved.
What does photosynthesis's mass mean?A tree's main component by weight is carbon. Carbon is derived from carbon dioxide, which is used in photosynthesis. Plants use photosynthesis to transform solar energy into chemical energy, which is stored in the bonds of carbon molecules made of water and carbon dioxide from the atmosphere.
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Where do new adaptations come from? There is more than one correct answer - choose all that
apply!!
O New combinations of genes from the parents
O Nature will give an organism the adaptations it needs to survive
O An organism can choose to grow an adaptation
O Mutations in the DNA passed on to an organism
Answers
Answer:
The answers are - An organism can choose to grow and adaptation. mutations in the DNA passed on to an organism.
Adaptation comes from new combinations of genes from parents and mutations in the DNA passed on to an organism. The correct options are A and D.
What is adaptation?The process by which organisms adapt to their environment in order to increase their chances of surviving in that environment is known as evolutionary adaptation, or simply adaptation.
"The process by which a species or an organism steadily improves its acclimation to its environment is defined as adaptation."
The behavioral or physical characteristics of an animal that improve its ability to thrive in its ecosystem are referred to as adaptation.
DNA changes handed down to the organism provide adaptations in the form of new traits. Lethal or beneficial, mutations can give an organism new traits and improve its chances of surviving.
Crossing over and recombination lead to new gene combinations derived from the parents' genes. These novel genomic fusions result in adaptations.
Thus, A and D are the correct options.
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A cup of water is surrounded by air at room temperature. How could you collect evidence to determine whether this system is at equilibrium?
Answers
Answer:
By measuring temperature and looking at the motion of the water in the cup, one can collect evidence to determine whether this system is at equilibrium
Explanation:
For any system to be in equilibrium there must be no transfer of heat and energy or motion between the system and the surrounding environment. If there is no change in the temperature and energy or motion of the cup of water, then it can be said that the system is in equilibrium.
During the process of fertilization, which step happens first?
The sperm’s nucleus enters the oocyte cell.
Enzymes break down the protective layer of the oocyte.
A sperm attaches to an oocyte.
The plasma membrane of the oocyte changes.
Answers
¿Cuáles son los usos beneficiosos del fármaco que utiliza la comunidad médic?
. What is the mechanism(s) that the drug uses?
Answers
Answer:
In pharmacology, the term mechanism of action (MOA) refers to the specific biochemical interaction through which a drug substance produces its pharmacological effect. A mechanism of action usually includes mention of the specific molecular targets to which the drug binds, such as an enzyme or receptor.
anybody please can help me with this one ?
Answers
Which molecule provides the amino acids that are assembled during translation ?
Answers
Answer:tRNA
Explanation:
1. What energy transformation occurs as biomass decays in a
compost bin:_________to__________
energy
Answers
The energy transformation that occurs as biomass decays in a compost bin is chemical energy to thermal energy.
What is energy?Energy can be defined as an ability of a physical object (body) to do work. Thus, energy must be possessed or transferred to a physical object (body) before it can be used in doing a work.
The forms of energy.In Science, there are different forms of energy and these include the following;
Gravitational energyElectrical energySound energyChemical energyThermal energyIn conclusion, the energy transformations that occur when biomass decays in a compost bin is chemical energy to thermal energy.
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the genome is essentially equivalent to all of the genetic information that is present in a single ______ set of chromosomes.
Answers
The genome is essentially equivalent to all of the genetic information that is present in a single haploid set of chromosomes.
A genome refers to the complete set of DNA that an organism possesses, including all of its genes and other genetic elements. In most organisms, this DNA is organized into chromosomes, which are long, linear structures made up of DNA and associated proteins. A haploid set of chromosomes refers to the complete set of chromosomes that an organism possesses in its gametes (sex cells), which only contain one copy of each chromosome. Therefore, the genome can be thought of as all of the genetic information contained within a single haploid set of chromosomes.
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The karyotype of a trisomic individual is symbolized as ____.
Answers
Answer:
2n+1.
Explanation:
The karotype of a trisomic individual is symbolized as 2n+1.
Vivienne visits a botanical garden in a nearby city and sees a plant commonly called Touch-Me-Not. She touches the tip of the leaf of this plant, known as Mimosa pudica, with her finger and watches the leaves close. She later learns that chemicals trigger this reaction. Plants respond to stimuli in different ways. Read each of the words or phrases sentences that describe a kind of tropism. Drag each into the correct box.
Answers
Stem is an example of negative gravitropism. Thus the correct matches are A-4, B-1, C-3, and D-2.
What is tropism?
A tropism is a phenomenon, which indicates the growth or turning movement of an organism, usually a plant, in response to an environmental condition. Types of tropism are shown by the parts of plants.
The phrases with the types of tropism are matched below
Stem is an example of positive gravitropism as the stem moves in an upward direction.The root is an example of negative gravitropism as it moves in a downward direction.Coils around any object it touches are an example of thigmotropism.Grows toward light are an example of phototropism.Learn more about tropism, here:
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Your question is incomplete. The complete question would be
A. Stem is an example of a?
B. The root is an example of a?
C. Coils around any object it touches are an example of?
D. Grows toward light is an example of a?
Types of tropism
1. negative gravitropism.
2. phototropism.
3. thigmotropism.
4. positive gravitropism.
Which describes an interaction within the musculoskeletal system?
When a muscle contracts, a bone will move.
• When a bone contracts, a muscle will move.
O When a tendon contracts, a ligament will move.
O When a ligament contracts, a tendon will move.
Answers
Answer:
A, When a muscle contracts, a bone will move.
Explanation:
Which of the following is NOT a category that is used to describe soil?
A particle size
B absorbency
C density
D texture
Answers
Scientists don't claim to_______
the theory. They just claim that the
results_______
it.
Answers
Answer:
scientists dont claim to know the theory they just claim that the results r true
Explanation:
what factors are responsible for increasing the size of a population?
Answers
Answer:
Economic development
Explanation:
1. Natural increase: This refers to the difference between the number of births and the number of deaths in a population. If the number of births is greater than the number of deaths, the population will grow.
2. Immigration: If people move into a population from other areas, it can contribute to population growth.
3. High fertility rates: A high fertility rate, or the average number of children a woman has during her reproductive years, can also contribute to population growth.
4. Increased life expectancy: If people are living longer due to advances in medicine and public health, the population will grow.
5. Changes in social norms: Changes in social norms, such as the acceptance of smaller families, can also impact population growth.
It's worth noting that population growth is not always a positive thing, as it can put strain on resources and the environment. Some countries have implemented policies to encourage smaller families and slow population growth.
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a more standardized protocol for the kirby-bauer method that allows for greater reliability in results would be to use : (a) agar plate media poured to a specific depth, and (b) bacterial cultures of specific cell densities (macfarland standards).True or False?
Answers
The standard protocol for Kirby-Bauer method will provide grater reliability when the media is poured to a specific depth and of specific density.
MH is an agar is used as a well-known medium for the Kirby-Bauer test. It have to be poured into the plate at a sure thickness and a sure pH to yield dependable results. The disk diffusion, or Kirby-Bauer, method, is a not unusualplace check used to decide antibiotic susceptibility . Diffusion checking out works through setting an antibiotic disc onto an agar plate containing bacteria.
Therefore, the given statement is true.
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researchers recorded that a certain bacteria population declined from 270,000 to 200 in 36 hours. at this rate of decay, how many bacteria will there be in 18 hours? round to the nearest whole number
Answers
researchers recorded that a certain bacteria population declined from 270,000 to 200 in 36 hours. at this rate of decay, 3985200 bacteria will there be in 18 hours
What is the rate of decay?The rate of radioactive decay, also known as the rate of decay, tells us how quickly the decaying nuclei change over time. The activity of the unstable atom will be revealed if the decay rate is taken as an absolute value.
Given that,
A = 200
A₀= 270000
K=?
t= 36 hours
A=A₀\(e^k\)t
Substitute the values in the formula.
200 = 270000 \(e^k\) 36
Solve for k.
Divide each side by 270000.
7.41 × 10⁻⁴ = ek 36
Take the natural log of each side.
or, ln (7.41 × 10⁻⁴ ) = lnek 36
or, ln (7.41 × 10⁻⁴ ) =36 k lne
or, ln (7.41 × 10⁻⁴ ) = 36 k
or, -7.21 = 36 k
or, k = - 0.2003
We use this rate of growth to predict the number of bacteria there will be in 18 hours.
A=A₀\(e^k\)t
Putting the values we get -
or, A = 270,000 × (0.82) × (18)
or, A = 3985200
At this rate of decay, researchers can expect 3985200 bacteria.
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5. What are virus hoaxes? Why are the hoaxes sometimes more dangerous than an actual virus?
Answers
Answer:
An actual computer virus is a malicious software, often known as malware, that can harm a computer and its users.
Virus hoaxes are false or misleading information about viruses that circulate through various communication channels.
They can be more dangerous than actual viruses due to their ability to spread quickly, cause panic, and undermine effective public health measures.
Virus hoaxes are deceptive messages or claims that often exaggerate the severity or impact of a particular virus. They can be spread through social media, email chains, or word of mouth. These hoaxes may include misinformation about symptoms, transmission methods, or false remedies, leading people to take ineffective or even harmful actions.
What makes virus hoaxes particularly dangerous is their potential to create panic and misinformation at a rapid pace. The viral nature of social media and other communication platforms allows these hoaxes to reach a wide audience within a short period. As a result, people may make decisions based on false information, such as avoiding necessary medical treatment, taking unnecessary precautions, or spreading fear and misinformation to others.
Moreover, virus hoaxes can undermine public health efforts by diverting attention and resources from legitimate preventive measures. They can erode trust in healthcare authorities and disrupt the dissemination of accurate information, making it harder for individuals to make informed decisions and follow recommended guidelines.
This can have severe consequences, especially during outbreaks or pandemics, where timely and accurate information is crucial for public safety. Therefore, it is essential to verify the credibility of information and rely on trusted sources to mitigate the risks associated with virus hoaxes.
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Amnio acids are linked together to make proteins by removing a molecule of what in the process called what
Answers
When you feel the warmth of the sun on your face what type of thermal energy transfer are you experiencing?
Answers
If you were to compare the endocrine system and the body's electrochemical information system in terms of speed, you might call the former a ________________ and the latter a text message.
Answers
If you were to match the endocrine system and the body's electro chemical information system in terms of speed, you would possibly call the former a tortoise; hare and the latter a text message.
What is endocrine system explain?
The system is a complex network of glands and organs. It uses hormones to regulate and coordinate your body's metabolism, energy state , reproduction, growth and development, and response to injury, stress, and mood. the subsequent are integral parts of the endocrine system: Hypothalamus.
What is the main function of endocrine system?
The system , made from all the body's different hormones, regulates all biological processes within the body from conception through adulthood and into old age, including the event of the brain and nervous system, the expansion and function of the reproductive system, also as the metabolism and blood sugar.
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After the supernova in a star’s life cycle, what else is formed in addition to a nebula?
red giant or protostar
neutron star or red giant
protostar or black hole
black hole or neutron star
Answers
Answer:
D. Black Holes and Neutron Stars
Explanation:
The core of a star can survive a supernova. It can become something diffrent.