Streptococci are coccoid bacterial cells, and when the Gram staining technique is used, they show up as purple (Gram-positive) stains. They do not produce spores and are not mobile.
What is Streptococci?These cocci have a diameter of between 0.5 and 2 m. Streptococcus species cell division is described as. These bacteria multiply in pairs or chains along a single axis or plane.
Blood agar is often incubated at 35–37 °C for 18–24 hours to produce colonies that are typically grayish-white, smooth, glossy, and translucent with areas of hemolysis or no hemolysis.
Many species of Streptococcus induce hemolysis, which is characterized by a partial breakdown of the red blood cells (RBCs) in the medium and is visible as a green zone encircling the colony due to hemoglobin coloring in RBCs.
Therefore, Streptococci are coccoid bacterial cells, and when the Gram staining technique is used, they show up as purple (Gram-positive) stains. They do not produce spores and are not mobile.
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why do dried fruits and beans swell when they are cooked in water? (use the word hypotonic in your answer nad explain the movement of water)
When they are dried, the concentration within increases. When placed in water, the osmosis process begins. As a result, they swell and revert to their previous shape. The process will be accelerated as the temperature rises since osmosis gets faster as the temperature rises.
What happens when you add water to dried fruit?
This is very simple, and works on any kind of dried fruit. Put your dried fruit in a small bowl and cover with boiling water. Let it steep for 10 to 15 minutes, and then strain the fruit and discard the water. The fruit will be plumper, juicier, and softer.
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Describe the functions of the auditory ossicles.
In order to transmit and amplify sound and transform sound waves into pressure waves in the perilymph and endolymph, the tympanic membrane and auditory ossicles are necessary.
Due to the tympanic membrane's wider diameter than the oval window and the auditory ossicles' articulated suspension, this function is made possible (the longer lever is at the tympanic membrane, the shorter lever is near to the oval window). A middle ear lesion does not necessarily equate to total deafness, while hearing is still possible without the auditory ossicles.
The malleus, incus, and stapes are the auditory ossicles.
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which of the following best describes a telomere? a. a region of intensely staining proteins dispersed throughout chromosomes that are actively being transcribed b. a protein-based structure found in the cytoplasm associated with controlling cell division c. a single stretch of dna that codes for nucleic acid polymerases d. a repetitive sequence found on the ends of chromosomes e. a dna sequence that codes for cytoskeletal proteins associated with intracellular communications
A chromosome's end contains a stretch of repeating DNA sequences known as a telomere. Chromosome ends are shielded from fraying or tangling by telomeres. The telomeres get a little bit shorter every time a cell divides.
Our somatic cells only contain very little amounts of telomerase. These cells age and lose their ability to operate normally because they do not use telomerase on a regular basis. Does the germline contain high quantities of telomerase? cells, including stem cells and egg and sperm. After DNA replication, the telomere length in these cells is preserved, and the cells do not age. Does cancer also have high quantities of telomerase? cells. Cancer cells can become immortal and keep growing as a result. If the telomerase activity changed.
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define the various kinds of organismal interactions (mutualism, cooperation, commensalism, predation, parasitism, amensalism, competition). what is parasitism and how does it differ from predation or amensalism?
A mutually beneficial connection is known as mutualism. Commensalism is a symbiotic connection in which one organism gains and the other does not.
What are the various species interactions you observe, and how would you describe them?The three main types of symbiosis—mutualism, commensalism, and parasitism—are included in the word, which also covers a wide spectrum of species relationships. Mutualism is a symbiotic connection in which both parties—or all parties—gain from it. Both compulsory and facultative mutualism exist.
What distinguishes parasitism from predation?Predation: The predator hunts its victim by exerting great physical effort. Parasitism: The spread of a parasite is typically passive. From the outside, they stalk, kill, and devour their prey.
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please help
which statement is correct about the krebs cycle?
a. it occurs in the cytoplasm of cells
b. it produces electron carriers that supply the electron transport chain in aerobic respiration
c. it is a phase of anaerobic respiration that is performed by bacteria
d. it is the light-independent reaction in photosynthesis
1. You are a Taxonomist who has just discovered a new organism and you are to place it one of the domains; • The organism seems to make its own food by utilizing chlorophyll - Which domain and kingdom does it belong? - How does it look like? - What other characteristics does it have related to the above description? - What is it's name?
The answers include the following:
The organism seems to make its own food by utilizing chlorophyll thereby the kingdom is Plantae while the domain is Eukarya.It has root, stem and leaves which have their unique functions.The other characteristics does it have related to the above description is the ability to perform photosynthesis and has a cell wall.Its name is plant.What is a Plant?These are the type of organisms which grows in the earth and has a stem, leaves, and roots.
They are also photosynthetic and produce food on their own which is why they are referred to as autotrophs.
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Members of the group a streptococci (GAS) cause all of the following except
A. Strep throat
B. Scarlet fever
C. Rheumatic fever
D. Pharyngitis
E. Epiglottitis
OPTION E is correct - Epiglottitis
When the epiglottis, a tiny cartilage "lid" that covers the windpipe, expands, it is said to have epiglottitis. The swollen area prevents air from entering the lungs. Epiglottitis may result in death. The epiglottis can enlarge for a variety of reasons. These causes include throat injuries, infections, and burns from hot liquids.
Anyone can develop epiglottitis at any age. Once, it was mainly understood by kids. Haemophilus influenzae type b (Hib) bacterial infection was the most frequent cause of epiglottitis in youngsters. The bacterium also brings on blood infections, meningitis, and pneumonia.
Epiglottitis in children is now uncommon thanks to the widespread use of the Hib vaccine for infants. It increasingly affects more adults. To avoid fatal complications, the condition needs to be treated right away.
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Question 26 (3 points) Which of the following is NOT product of transcription? A)a new strand of DNA B) rRNA tRNA D) mRNA E) None of the answers are correct; all of these are products of transcription:
A) 'a new strand of DNA' is not a product of transcription.
DNA transcription is the process of creating an RNA copy of a gene's DNA sequence. The copy which is also called messenger RNA or mRNA carries the gene's protein information encoded in DNA. In simple terms, the process through which DNA is copied to RNA is referred to as transcription. In the context of DNA transcription, making a new strand of DNA is not considered a product of the transcription process.
Thus, as per the given options, the only true answer pertains to option A, which is 'a new strand of DNA' is not a product of transcription.
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A pea plant has seven pairs of homologous chromosomes. What is its haploid number? What is its diploid number?
If a pea plant has seven pairs of homologous chromosomes, then its haploid number is 7 and its diploid number is 14.
What are haploid and diploid numbers?The terms haploid and diploid numbers make reference to the complete set of chromosomes that a species has in a given cell type, haploid is the complete set of these chromosomes while diploid refers to two complete sets.
Therefore, with this data, we can see that haploid and diploid numbers make reference to the number of sets of entire chromosomes for a cell type.
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Drag the 20 mwco membrane to the membrane holder between the beakers
To simulate simple diffusion using a dialysis machine, first fill the left beaker with a solution containing specific solutes such as sodium chloride, urea, albumin, glucose, etc., and fill the other right beaker with the solute.
What is the further procedure?
Put no deionized water and gradient. A semi-permeable dialysis membrane should be placed between the cups to allow diffusion. Dialysis membranes with different pore sizes in the right corner are indicated by MWCO20, MWCO50, MWCO100, and MWCO200. The smaller ones have smaller pore sizes and the larger ones have the largest pores. The larger the pore size, the easier the diffusion of solutes.
Start with pore size MWCO20. First pull the MWCO20 dialysis membrane from the right corner and place it between the cups. Then fill the cup with the appropriate solution. You must read the text before starting the activity. The first activity is in Na+/Cl- solution. Adjust the concentration of this solution to 9 mM on the left and press the dispense button. Now you can see the solution dispensed into the left cup. The right beaker should contain 0 mM deionized water. Simply press the deionized water button, then press the dispense button. Then you have to set the time
To do this, set the timer to 60 minutes and press start. Wait for the timer to reach zero to see if diffusion has occurred. Information is displayed in the message window. A message will appear stating that there is no diffusion. This indicates that there was no diffusion through the MWCO20 membrane, indicating that the pore size is too small for ions to diffuse. Repeat this experiment with urea, albumin and glucose and record the results. Note that the cup must be rinsed and refilled with new solution each time.
Now replace MWCO20 with MWCO50 and start the experiment with Na+/Cl- solutions. In MWCO50, diffusion occurs from the left cup to the right cup and the message window displays the average diffusion rate and time. Measurements such as MWCO pore size, initial left soluble concentration mM, initial right soluble concentration mM, and average diffusion rate can be recorded in the table below. Repeat the experiment for albumin, urea and glucose and record the measurements.
Therefore, Now repeat the experiment at MWCO100 and MWCO200 for each solution to see if diffusion occurred and record the measurements.
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The complete question is:
How do you do a simulating Dialysis? Drag the 20 mwco membrane to the membrane holder between the beakers?
what role did the hcl play in part 2? how do these results correlate with where hcl occurs in the human body?
HCl's function is Hydrochloric corrosive is the most common corrosive in the stomach. It destroys bacteria as well as other harmful species. It can also be used as a food additive.
To utilise proteins in our stomach, HCl converts pepsinogen, which is not dynamic, into pepsin. Hydrochloric acid improves protein absorption by supplying H+, which activates pepsinogen, the precursor of pepsin.
Pepsinogen is produced by boss cells in the body's gastric organs and the stomach's antrum.
Pepsinogen is transformed into pepsin, a protein digesting enzyme. The presence of gastrin in the blood stimulates their synthesis. Pepsinogen is converted to pepsin by hydrochloric acid (HCl), which then degrades proteins into peptides. In the stomach, hydrochloric acid (HCl) keeps the pH around 2.0.
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which is an example of acclimatization? a) increased heart rate during strenuous physical activity b) lactase persistence among europeans c) increased oxygen saturation in the red blood cells of tibetans d) a suntan in summer
Answer:
C. Increased oxygen saturation in the red blood cells of tibetans.
in a cross between an inbred strain of large guinea pigs and an inbred strain of small guinea pigs, the f1 are phenotypically uniform with an average size about intermediate between that of the two parental strains. in one experiment, the f1 progeny were allowed to mate and among 1014 f2 progeny 3 were about the same size as the small parental strain and 5 about the same size as the large parental strain. how many genes are involved in the inheritance of size in these strains of guinea pigs?
In these guinea pig strains, there are 5 genes that contribute to size inheritance.
What exactly is an inbred strain?A population of animals that is the product of at least 20 consecutive generations of brother-sister matings is referred to as an inbred strain. The resulting creatures are, in essence, genetic clones of one another.
What is strain in the breeding of animals?A strain is created by mating mice from the same family for at least 20 generations. Although some residual heterozygosity can persist up to the 60th filial generation, mice of the same strain are thought to be genetically identical to one another.
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What result would you expect if inherited variation turned out to be more important than environmental variation in determining your behaviour?
If inherited variation turned out to be more important than environmental variation in determining the behavior then we can expect to see more similar behavior patterns between parents and biological offspring than non-biological offspring.
How do genetics and environment work to shape complex traits?Genetics and environment are two major factors that work together to shape the phenotype of complex traits such as behavior patterns, which are deepened on these factors and also the interaction between genetic factors and environmental conditions.
Therefore, with this data, we can see that complex traits depend not only on genetics and environment but also on the interaction between these factors.
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Why is it important to récord all data and procedures in an experiment
It is important to record all data and procedures in an experiment because the evidence and the proof depend upon the data that is found in the scientific experiment.
What is the significance of the scientific data?The scientific data is important when the experiment is done, as from the data the result is gotten, and based upon the data, the research is carried out in a particular direction, and the further experiments and the possible mistakes can be identified through this data record.
Hence, it is important to record all data and procedures in an experiment because the evidence and the proof depend upon the data that is found in the scientific experiment.
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04.10. A large population of land turtles on an isolated island has two alleles determines shell thickness: The allele for thinner shells is dominant shells. The over the thinner-shell allele occurs at a frequency of 20%. t0 Assuming thick or thin shells, what should there the population? frequency of homozygous thicker-she (Hint: Use a large Punnett square to calculate 49 the answer:) 16% 50% 64
The frequency of homologous thicker shelled turtles is 64%.
What is Punnett square?
The Punnett square is a square diagram that is used to predict the genotypes of a particular cross or breeding experiment. It is named after Reginald C. Punnett, who devised the approach in 1905. The diagram is used by biologists to determine the probability of an offspring having a particular genotype
A large population of land turtles on an isolated island has two alleles for a gene that determines shell thickness go forth in their shells is dominant over the allele for sickle shares the thinner shell Elia appears at a frequency of 20% assuming there is no net advantage to fix a thin shell what should the frequency of homozygous sticker shelled turtles be in the population
The frequency of homologous thicker shelled turtles is 64%.
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explain the flow of genetic information from the beginning of the cell cycle to the conclusion of it.
Genetic information is partitioned during the cell cycle such that each daughter cell receives the same information. Synthesized on a DNA template is where genetic data comes from.
The messenger RNA (mRNA) is produced during transcription (DNA to RNA), which takes place in the nucleus before the messenger RNA is transported to the cytoplasm. The two main procedures include Transcription and Translation. Gene expression is the result of the joint work of transcription and translation. The information contained in the DNA of a gene is transferred to an analogous molecule called RNA (ribonucleic acid) in the cell nucleus during transcription. DNA-encoded genetic information is expressed by the production of particular RNAs and proteins, and information travels from DNA to RNA to protein. The production of RNA under DNA control is called transcription.
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a microarray known as a genechip, with most of the human protein-coding genetic sequences, has been developed to aid in the study of human cancer by comparing gene sequences and patterns of gene expression in cancer cells with those in normal cells. what kind of information might be gleaned from this genechip to aid in cancer prevention?
The information that could inform patients of the type of cancer they were most likely to develop. By using a genechip, a microarray. They are utilized in experiments involving hybridization with labeled mRNA.
What are the advantages and uses of a microarray?DNA microarrays are mostly employed for transcriptional profiling, but they can also be utilized for large-scale DNA variation analysis, quick chromosomal structure analysis, and global protein-binding site discovery.
What does ChIP sequencing accomplish?ChIP sequencing (ChIP-Seq), a potent technique for discovering genome-wide DNA binding sites for transcription factors and other proteins, combines chromatin immunoprecipitation (ChIP) tests with sequencing. Using a particular antibody, DNA-bound protein is immunoprecipitated in accordance with ChIP methods.
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The major endocrine organs of the body a. tend to be very large organs. b. are closely connected with each other. c. all contribute to the same function (digestion). d. tend to lie near the midline of the body.
The majority of the body's primary endocrine organs often sit close to the midline.
Endocrine organs your brain contains the pituitary, pineal, and hypothalamic glands. Your neck houses the thyroid and parathyroid glands. Your thymus, adrenal glands, and endocrine organs are all located behind your stomach, endocrine organs above your kidneys, and between your lungs. Under the corpus callosum, at the midline of the brain, is where you'll find the pineal body. It generates the melatonin hormone, which aids the body in determining when it is time to sleep. The pituitary gland is the pea-sized object hanging below it. It controls the action of the glands, earning it the name "master gland."
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Truth or Baloney?The cutaneous membrane is more commonly called the skin.
The cutaneous membrane is more commonly called the skin is true statement the pores and skin's number one position is to assist shield the relaxation of the frame's tissues and organs.
Membrane extra usually realize as pores and skin utaneous membrane is a subdivision of the epithelial membrane. It is likewise referred to as the pores and skin and is the number one organ of the integumentary system. Cutaneous membrane covers the floor of the frame and includes stratified squamous epithelium and the underlying connective tissues.
The pores and skin is known as the cutaneous membrane due to the fact the phrase cutaneous clearly means ''regarding the pores and skin''. Additionally, in organic terms, a membrane refers to a thin, sheet-like shape that serves as a boundary or barrier in a dwelling organism.The pores and skin is an epithelial membrane additionally known as the cutaneous membrane. It is a stratified squamous epithelial membrane resting on pinnacle of connective.
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select the descriptions that apply to the ribosome. a) a membrane-bound organelle that stores digestive enzymes b) a molecular structure that is the site of synthesis c)a membranous network associated with protein production d) a membrane-enclosed organelle that stores DNA e) a cellular structure that is composed of both RNA and protein
A membranous network associated with protein production, A cellular structure that is composed of both RNA and protein.
What is a Ribosome?
Ribosomes are macromolecular machines, found within all cells, that perform biological protein synthesis. Ribosomes link amino acids together in the order specified by the codons of messenger RNA molecules to form polypeptide chains. Ribosomes consist of two major components: the small and large ribosomal subunits.
The ribosome is a membranous network associated with protein production, it is a cellular structure that is composed of both RNA and protein.
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If two trucks have the same mass, but truck A is traveling 15 km/h, and truck B is traveling 30 km/h, what statement is true?
Question 10 options:
Truck A has greater kinetic energy
Truck A will have a greater stopping distance
Truck B has less kinetic energy
Truck B will have a greater stopping distance
Any object in motion is using kinetic energy: a person walking, a thrown baseball, a crumb falling from a table, and a charged particle in an electric field are all examples of kinetic energy at work.
What is kinetic energy in simple terms?Kinetic energy is the energy of motion, observable as the movement of an object, particle, or set of particles. Any object in motion is using kinetic energy: a person walking, a thrown baseball, a crumb falling from a table, and a charged particle in an electric field are all examples of kinetic energy at work.There are five main types of kinetic energy: radiant, thermal, sound, electrical, and mechanical.Given that the two trucks have the same mass but different velocities, that is truck A is traveling 15 km/h and truck B is traveling 30 km/h, hence Truck B will have a greater stopping distance.The reason why Truck B will have a greater stopping distance is because it speed is greater hence more distance to cover.
From the following expression
Speed = Distance/Time
Distance = Speed*Time
More on the kinetic Energy
Following from the given problem truck B will also have more kinetic energy because it velocity is moreFormula
KE= 1/2mv^2
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in osmosis, as in other forms of _____________, molecules move from an area of ____________ concentration to an area of __________ concentration
In osmosis, as in other forms of WATER molecules move from an area of HIGH concentration to an area of LOWER concentratio.
What is the name for water molecules?H2O is the designation given to water in science. Due to the fact that it contains two hydrogen (H) atoms and one oxygen atom, it is known as H2O. (O). These molecules number in the millions in a single drop of water.
Is H2O a molecule of water?Even though a single water molecule (H2O) is made up of one oxygen atom coupled to two hydrogen atoms, a group of H2O molecules alone can only exist as a gas. The H atoms in each H2O molecule are positively charged, while the O atoms are negatively charged.
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QUESTION 22 Which statement is NOT true regarding the bones and the skeletal system? a)Red bone marrow is commonly found in spongy bone within adults b)The majority of bones development from cartilage tomplate through process called endochrondal ossificatio c)The osteoblasts help break down the extracellular matrix of bone tIssue d)Compact bone is organized in structures called osteons
The statement which is not true regarding the bones and the skeletal system is: The osteoblasts help break down the extracellular matrix of bone tissue.
What are osteoblasts?
Osteoblasts are specialized mesenchymal cells that synthesize bone matrix and coordinate skeletal mineralization. These cells work in concert with osteoclasts to resorb bone in a continuous cycle throughout life. The unique function of osteoblasts requires large amounts of energy production, especially during the stages of new bone formation and remodeling. Research over the past 15 years has shown that osteoblasts secrete endocrine factors that integrate the metabolic demands of osteogenesis and overall energy balance through regulation of insulin production, feeding behavior, and lipid metabolism. increase. In this article, specific energy substrates (glucose, fatty acids). Promotes bone formation and promotes osteoblast differentiation.
Therefore, The statement which is not true regarding the bones and the skeletal system is: The osteoblasts help break down the extracellular matrix of bone tissue.
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in a typical pcr, primers are used to cleave specific regions of the dna template.
In a typical PCR primers used to cleave DNA template is false as the PCR-primarily based totally approach advanced for flanking collection isolation become inverse PCR.
Genomic DNA from a specific mutant plant line is isolated, cleaved with a limit enzyme as mentioned above for plasmid rescue, and self-circularized.In the PCR method, a couple of primers hybridizes with the pattern DNA and defines the vicinity with the intention to be amplified, ensuing in tens of thousands and thousands and tens of thousands and thousands of copies in a completely quick timeframe.
Primers also are utilized in DNA sequencing and different experimental processes.Primers permit DNA polymerase to begin elongating DNA. Primers are used withinside the Polymerase Chain Reaction (PCR) as a step in amplifying a quick collection of DNA. They are particular as they simplest bind to specific vicinity in DNA wherein DNA transcription begins offevolved off from 5' to 3'.In a normal PCR, primers are used to cleave unique areas of the DNA template.
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What did Rosalind Franklin contribute to the effort to identify the structure of DNA?
Rosalind Franklin of King's College London used X-ray crystallography to create pictures of DNA, a notion previously proposed by Maurice Wilkins.
Franklin's photographs enabled James Watson and Francis Crick to develop their renowned two-strand, or double-helix, model.
Rosalind Franklin was instrumental in the discovery of DNA's double helix structure. Her contribution to science was substantial, despite the fact that her work was overlooked.
She researched X-ray diffraction technology and applied it to the study of DNA. This X-ray diffraction image of a DNA molecule served as the inspiration for Watson and Crick's DNA model.
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Human height occurs in a countinous range because it is affected by the interaction of many genes making it a(n)
Answer:
Human height occurs in a countinous range because it is affected by the interaction of many genes making it a(n) polygenic trait
Explanation:
i paid attention in my biology class buddy
attached to proteins stick out from the plasma membrane to define the cell’s characteristics and help cells identify chemical signals.
On the membrane's exterior, some of the lipids and proteins are joined by carbohydrates. These come together to form complexes that serve as the cell's unique identification to other cells.
Membranes contain a lot of proteins in addition to lipids. In actuality, proteins make up about half of the mass of most cellular membranes. Transmembrane proteins are those that are embedded within the membrane and protrude on both sides.
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all cells no matter what their size is contain
Answer:
all cells contain organelles
Explanation:
____ the most common form of gene therapy involves inserting a normal gene into cells that contain a defective version of the gene. in order to use gene therapy to prevent a man from passing a defective gene on to future generations, you should try to insert normal copies of the gene into
Gene replacement therapy the most common form of gene therapy involves inserting a normal gene into cells that contain a defective version of the gene. in order to use gene therapy to prevent a man from passing a defective gene on to future generations.
The idea behind gene therapy is to address a genetic issue at its root. Gene therapy could be used to deliver a copy of a gene that does not contain the harmful mutation and produces a functional protein, for example, if a mutation in a particular gene results in the production of a protein that is dysfunctional and causes the development of an inherited disease (typically recessively). This method is used to treat inherited retinal problems and is known as gene replacement therapy.
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