Below is an essay prompt. Use the drop down menus to fill in the paragraph so it correctly answers the prompt What concentration of ethanol is used to sanitize bench tops and why? The ethanol used to santizle benchtops should be a 70 concentration. Ethanol kills microbes in part by dissolving the cell membrane. At higher or Lower concentrations, the ethanol coagulates proteins too quickly creating a protective barrier around the cell instead of actually killing them. The lower or higher concentration of ethanol penetrates cells causing a greater proportion of exposed cells to die. Further, at higher or lower concentrations, the ethanol evaporates too quickly reducing or increasing the contact time and making ita more or less effective disinfectant
Answers
The concentration of ethanol used to sanitize bench tops should be 70% concentration. This is because ethanol kills microbes by dissolving the cell membrane.
Ethanol is a widely used sanitizer for bench tops and other surfaces because it is an effective disinfectant that is easy to use.
The ideal concentration for sanitizing bench tops is 70%. Ethanol kills microbes by dissolving the cell membrane.
At higher or lower concentrations, the ethanol coagulates proteins too quickly, creating a protective barrier around the cell, instead of killing them.
However, at a 70% concentration, ethanol can penetrate the cell, causing a greater proportion of exposed cells to die.
Furthermore, at higher or lower concentrations, the ethanol evaporates too quickly, reducing or increasing the contact time and making it a less effective disinfectant. Therefore, a 70% concentration of ethanol is the most effective for sanitizing bench tops.
To know more about microbes, visit:
https://brainly.com/question/30450246
#SPJ11
Related Questions
Explain how Chromosomes are like a ball of yarn (use the words chromosome, DNA, and gene in your answer)
Answers
Answer:
Chromosomes are like a ball of yarn in the sense that there are multiple components that make up the structure. Genes can be in similitude of the smallest threads in the yarn and when a multitude of genes are put together they make a DNA strand or a long, thick thread of yarn. Lastly, when DNA is twisted together, it becomes bundled together, making a chromosome or a "ball of yarn".
Explanation:
Studies of vacuoles reveal that they are *
1 point
A) sites for the attachment of spindle fibers
B) sites of cellular respiration
C) reservoirs for water and dissolved minerals
D) information centers for all cellular activities
Answers
The ____________ collect bile produced in the hepatic lobules and deliver it to the hepatic ducts on their way to the ____________ for storage
Answers
The bile ductules collect bile produced in the hepatic lobules and deliver it to the hepatic ducts on their way to the gall bladder for storage.
Bile produced by the liver cells is gathered by a network of ducts that exit the liver through the right and left hepatic ducts. The common hepatic duct is where these channels ultimately empty. The common bile duct is created when the gallbladder's cystic duct and the common hepatic duct combine.
Bile, a substance made up of fluid, fat, and cholesterol, is kept in the gallbladder. Your intestines need bile to break down fat from diet. The small intestine receives bile from the gallbladder. Numerous digestive fluids and hormones, including insulin, are produced by this organ.
Therefore, The bile ductules collect bile produced in the hepatic lobules and deliver it to the hepatic ducts on their way to the gall bladder for storage.
Learn more about bile here;
https://brainly.com/question/4121486
#SPJ4
can someone send a link on this topic or help me do it in any way?? its due tomorrow
Answers
Answer:
You should explain more...
Explanation:
glycosaminoglycans (gags) are heteropolysaccharides composed of repeating disaccharide units. these units have some similar characteristics that allow them to be identified as gags.which of the structures are examples of glycosaminoglycans?
Answers
There are several types of glycosaminoglycans (GAGs), which are a family of long, linear, negatively charged heteropolysaccharides that are important components of connective tissues.
Hyaluronic acid is a long, unbranched monkeyshine comprised of repeated D- glucuronic acid and N- acetyl- D- glucosamine disaccharide units. It's set up in high attention in synovial fluid, vitreous humor, and other connective apkins. Chondroitin sulphate is a sulfated monkeyshine made up of repeated D- glucuronic acid and N- acetylgalactosamine disaccharide units.
Dermatan sulphate is a sulfated monkeyshine made up of repeated L- iduronic acid and N- acetyl- D- galactosamine disaccharide units. It's set up in large quantities in skin, blood vessels, and other connective apkins. Heparin is a largely sulfated monkeyshine made up of repeated uronic acid and glucosamine disaccharide units. It's an anticoagulant that occurs naturally and is synthesised and stored in mast cells.
Learn more about glycosaminoglycans at
https://brainly.com/question/12896508
#SPJ4
What structure is used to help count the numbers of chromosomes
Answers
The structure is used to help count the numbers of chromosomes is the centromere.
What is the centromere?When a cell divides, the centromere, which resembles a constrictive area of a chromosome, is crucial in assisting DNA division (mitosis and meiosis). It is specifically the area where the spindle fibers of the cell are attached.
The number of chromosome = count the number of functional centromere.
The number of DNA molecule = count the number of chromatids.
Centromeres are necessary for eukaryotes' correct chromosomal segregation during cell division.
They are distinguished by binding kinetochore proteins and highly repetitive DNA sequences, which are necessary for the mitotic attachment of microtubules to the chromosomes.
Therefore, the centromere is the structure which help in count the numbers of chromosomes
To learn more about centromere, refer to the link:
https://brainly.com/question/19339239
#SPJ6
if you are interested in studying the same group under two conditions, what test should you use?a) Regressionb) Dependent Samples t-Testc) Analysis of Varianced) Independent Samples t-Test
Answers
If you are interested in studying the same group under two conditions, the appropriate test to use is the Dependent Samples t-Test, also known as the paired samples t-test.
This test is used to compare the means of two related groups, where each participant in one group is matched with a participant in the other group. The dependent samples t-test is ideal for studying changes within a group over time, or when comparing the effectiveness of two different treatments on the same group of people. This test is more powerful than the independent samples t-test, which is used to compare the means of two unrelated groups. Additionally, it is important to note that regression and analysis of variance (ANOVA) are not appropriate tests for this type of comparison.
to know more about paired samples t-test visit:
https://brainly.com/question/29745423
#SPJ11
which set includes the charged components that are more abundant in the cytosol of a neuron than in the extracellular fluid outside the cell?
Answers
The inside of the cell contains more potassium ions than the outside does. The system as a whole is electrically neutral because an anion balances out each potassium ion (on either side of the membrane).
A neuron is negatively charged when it is at rest because a cell's interior is roughly 70 millivolts (mV) more negatively charged than its exterior. Potassium concentrations within cells are higher than those outside of them. Potassium ions move outward while sodium, calcium, and chloride ions flow inward under the control of concentration forces.
Learn more about anion
https://brainly.com/question/22048063
#SPJ4
The energy in many of those food particles is ultimately transferred into ______. A. Complex carbohydrates B. Glucose C. Proteins D. Lipids
Answers
Use the information gathered in the Bidirectional Replication of DNA animation to answer the question. Which statement is true of DNA replication? The lagging strand is composed of Okazaki fragments. The leading strand requires multiple primers. DNA synthesis is away from the replication forks. The lagging strand is synthesized continuously. DNA is always synthesized continuously.
Answers
The statement that is true of DNA replication is that the lagging strand is composed of Okazaki fragments.
Let's understand this in detail:
The process by which DNA is replicated is referred to as DNA replication. It occurs in the S phase of the cell cycle and is necessary for cell division to occur.
DNA replication occurs in a bidirectional manner, with two replication forks moving in opposite directions from the origin of replication.
The lagging strand is composed of Okazaki fragments, which are short DNA fragments synthesized in the opposite direction of replication fork movement, which must be stitched together by DNA ligase to complete the replication process.
On the other hand, the leading strand is continuously synthesized in the direction of the replication fork movement, and only requires a single primer to initiate replication. Thus, the statement that is true of DNA replication is that the lagging strand is composed of Okazaki fragments.
#SPJ11
Learn more about DNA replication: What is DNA Replication? https://brainly.com/question/29791981
What are three substances that the embryo needs to grow and one substance it needs to excrete
Answers
Answer:
Development of the fetus to grow
oxygen for respiration. nutrients (food and water)
The developing fetus also needs its waste substances removing. The fetus is protected by the uterus and the amniotic fluid , a liquid contained in a bag called the amnion.
Hope this helps!
In organisms, macromolecules are made up of subunits. Which of these pairs correctly describes how a macromolecule is constructed?
A.DNA is made up of nucleic acids.
B.Protein is made up of amino acids.
C.Nucleic acids are made up of DNA.
D.Amino acids are made up of protein.
Answers
Answer:
I would go with C.
Explanation:
Write the changes occurring in the passage through the alimentary canal as a person has ingested roti and dal as a part of his meal
Answers
Answer:
A person had roti and dal for his lunch. Trace the changes in those during its passage through the alimentary canal. Answer: ... The saliva contains an enzyme salivary amylase (ptyalin) which converts starch in roti into maltose, isomaltose and small dextrins called a-dextrin.
Explanation:
In which direction does heat always flow
Answers
Why is sunlight necessary for photosynthesis?
Answers
Answer:
Sunlight provides the energy needed for photosynthesis to take place. In this process carbon dioxide and water are converted into oxygen (a waste product that is released back into the air) and glucose (the source of energy for the plant).
Dna profiling is a forensic procedure being utilized to identify individuals. This technique _____.
Answers
True/False : if the nacl concentration drops below 1.5 m the cell walls of halobacterium become more rigid.
Answers
The statement "if the nacl concentration drops below 1.5 m the cell walls of halobacterium become more rigid." is false.
Halobacterium is a type of extremophile archaea that lives in high-salt environments such as salt lakes, salt flats, and salt pans. To survive in such environments, Halobacterium has adapted to high salt concentrations by accumulating large amounts of intracellular salt. This adaptation helps to maintain the cell's turgor pressure and prevent dehydration.
One of the adaptations of Halobacterium to high salt concentrations is the modification of its cell walls. The cell walls of Halobacterium are composed of glycoproteins and glycolipids, which form a lattice-like structure that is stabilized by salt bridges. As the salt concentration in the environment increases, the lattice structure of the cell wall becomes more stable, and the cell wall becomes more rigid. Conversely, as the salt concentration decreases, the lattice structure of the cell wall becomes less stable, and the cell wall becomes more flexible.
Therefore, if the NaCl concentration drops below 1.5 M, the cell walls of Halobacterium would become less rigid, not more rigid.
Learn more about halobacterium at: https://brainly.com/question/9313059
#SPJ11
Which property of water makes it mix well with most solutes?
A. Cohesion and Adhesion
B. High Heat Capacity
C. Universal solvent
Answers
Answer:
it would be C. Universal solvent
Which of the following science fields would be most useful for an environmental scientist to understand how energy transformations occur to provide electricity to communities? Biology Chemistry Geology Physics
Answers
Answer:
Physics
Explanation:
It helps in the study of matter and it's interaction with the environment
Which planets are considered outer planets?
Select the four correct answers.
Answers
true or false the mitochondria and chloroplasts are thought to have evolved by invagination and pinching off from the plasma membrane of the ancient eukaryotic cell.
Answers
The given statement is true. The mitochondria and chloroplasts are believed to have evolved through endosymbiosis, where free-living prokaryotic organisms were engulfed by larger eukaryotic cells.
It is believed that the mitochondria evolved from an ancestral aerobic prokaryote that was engulfed by an ancestral eukaryotic cell, while the chloroplasts evolved from an ancestral photosynthetic prokaryote that was engulfed by an ancestral eukaryotic cell. Over time, these endosymbiotic relationships became mutually beneficial, leading to the development of organelles with specialized functions within eukaryotic cells. The smaller cell became a mitochondrion or chloroplast, providing the host cell with energy or carrying out photosynthesis, respectively.
For more questions relating to endosymbiosis, refer to:
https://brainly.com/question/1698852
#SPJ11
in the process of carbon fixation, rubp attaches a co2 to produce a six-carbon molecule, which is then split to produce two molecules of 3-phosphoglycerate. after phosphorylation and reduction produces glyceraldehyde 3-phosphate (g3p), what more needs to happen to complete the calvin cycle? in the process of carbon fixation, rubp attaches a co2 to produce a six-carbon molecule, which is then split to produce two molecules of 3-phosphoglycerate. after phosphorylation and reduction produces glyceraldehyde 3-phosphate (g3p), what more needs to happen to complete the calvin cycle? regeneration of atp from adp addition of a pair of electrons from nadph regeneration of rubp regeneration of nadp
Answers
Regeneration of rubisco. This ensures that the cycle continues to take place and continue to fix CO2.
What is carbon fixation ?RuBP and CO2 react, and RuBisCO catalyses the formation of a six-carbon compound that is quickly split into two three-carbon compounds. Because CO2 is "fixed" into organic molecules during this process from its inorganic form, it is known as carbon fixation.
The fixation reaction is catalysed by an enzyme called RuBisCO, which combines RuBP and CO2. The resulting six-carbon compound is split into two three-carbon compounds, which are then transformed into G3P by ATP and NADPH using their stored energy.RuBP and CO2 react through the catalysis of RuBisCO. Three molecules of 3-phosphoglyceric acid (3-PGA) are created for each CO2 molecule that interacts with one RuBP molecule. 3-PGA contains one phosphate and three carbons. One RuBP and one carbon dioxide are all that are needed for each cycle turn to produce two 3-PGA molecules.Learn more about Carbon fixation here:
https://brainly.com/question/807565
#SPJ4
describe the differences in nuclei and cell shape between the skeletal and cardiac muscle slides.
Answers
The skeletal and cardiac muscle slides have notable differences in nuclei and cell shape. In skeletal muscle, the nuclei are elongated and located at the periphery of the cell. This allows for more space in the cytoplasm for the myofibrils to contract. Additionally, skeletal muscle cells are cylindrical and have multiple nuclei due to the fusion of myoblasts during development.
On the other hand, cardiac muscle has a different cell shape and nuclei arrangement. The nuclei in cardiac muscle cells are centrally located, and the cells are branched, forming intercalated discs that connect adjacent cells. These discs allow for coordinated contractions, ensuring efficient pumping of blood throughout the heart.
In summary, the differences in nuclei and cell shape between skeletal and cardiac muscle slides reflect the unique functions of each muscle type. Skeletal muscle is responsible for movement and requires a cylindrical shape with elongated nuclei, while cardiac muscle needs a branched shape and central nuclei to ensure coordinated contractions.
To know more about cardiac muscle refer here
https://brainly.com/question/14855534#
#SPJ11
which factor least influences the rate of photosynthesis?
A) Atmospheric concentration of carbon dioxide
B) Time of day
C) Number of chloroplasts
D) Concentration of nitrogen in the air
Answers
Which factor least influences the rate of photosynthesis?
Options :-A) Atmospheric concentration of carbon dioxide
B) Time of day
C) Number of chloroplasts
D) Concentration of nitrogen in the air
Answer :-D) Concentration of nitrogen in the air
Explanation :- Concentration of nitrogen in air is about 78% and it's insert in nature bez neither the planets nor the animals have the ability to break three bonds of N2 molecule (gas ) so any alterations in its concentration will not make any influence in photosynthesis concentration of CO2 make influence in the maximum but it also makes its effect upto some extent and that extent is called the saturation point Time of the day is effects like in morning and Evening photosynthesis is very less in comparison to the photosynthesis in afternoonRate of photosynthesis is directly proportional to number of chloroplast as more the number of chloroplast more will be the photosynthesisThe factor that least influences the rate of photosynthesis is the Concentration of nitrogen in the air. Thus, the correct option for this question is D.
What is Photosynthesis?Photosynthesis may be defined as a type of process through which green plants and some photosynthetic algae synthesize their own food in the form of glucose with the help of carbon dioxide and water in the presence of sunlight.
The process of photosynthesis significantly depends on the amount and color of sunlight along with the amount of carbon dioxide because they are the reactants of this reaction while the amount of sugar is delivered as a product of the reaction.
Therefore, the factor that least influences the rate of photosynthesis is the Concentration of nitrogen in the air. Thus, the correct option for this question is D.
To learn more about Photosynthesis, refer to the link:
https://brainly.com/question/26568636
#SPJ2
In ecosystems, biotic an abiotic factors influence one another. Give three examples of an interaction between a biotic and abiotic factor in any of the marine ecosystems from the chart. (Use the back for more room).
Answers
Answer:
One of the most critical interactions in an ecosystem between the biotic and abiotic environment is photosynthesis, the base chemical reaction that drives most life on earth. Plants and algae use sunlight, water and carbon dioxide to create the energy they need to grow and live via photosynthesis.
Hope this helps!
Question 14 (2 points) The process of evolution that involves a change in the DNA sequence that leads to evolutionary change is called natural selection. O mutation. genetic drift. migration.
Answers
The process of evolution that involves a change in the DNA sequence that leads to evolutionary change is called a mutation.
A mutation is a sudden and lasting alteration in the DNA sequence that can influence genetic variation. Changes in the DNA sequence can influence phenotype, which may or may not have an effect on an organism's fitness. Mutations occur spontaneously, either from errors in DNA replication or from exposure to mutagenic agents. Mutations may happen in either coding or non-coding regions of the DNA, and they can be either silent or expressed.
Evolution is a natural process that results in the gradual change of inherited characteristics in populations over generations. It is the process of alteration in the inherited characteristics of species over successive generations. In other words, it is the process of gradual changes that happen to species over time as they adapt to their environments. It can be defined as a change in the gene frequency in a population over time.
Types of Evolution 1. Natural Selection 2. Genetic Drift 3. Gene Flow 4. Mutation 5. Non-Random Mating 6. Admixture 7. Mutation Pressure 8. Genetic Draft 9. Bottleneck and Founder Effect 10. Sexual Selection the process of evolution that involves a change in the DNA sequence that leads to evolutionary change is called a mutation.
To learn more about DNA sequence here
https://brainly.com/question/31650148
#SPJ11
Theo em có những nguyên nhân nào có thể làm cản trở sụn phát triển
Answers
Part D
Choose one of there hypotheses to make a prediction
Answers
Answer: The tomato plants will grow faster and taller in soil with compost over a 30-day period.
These plants have free-living gametophytes and free-living sporophytes. The sporophyte generation is dominant and larger than the gametophyte generation. There is one type of spore, and the gametophyte generation grows outside of the spore wall. Which plant or plants am I describing? (SELECT ALL THAT APPLY) 000000000 Ferns Cycads Selaginella Lycopodium Conifers Ginkgo Hornworts Mosses Angiosperms 3 pts Liverworts
Answers
The correct answers are: Ferns, Hornworts, Mosses, and Liverworts.
The plants that fit the given description are:
Ferns: Ferns have free-living gametophytes and free-living sporophytes. The sporophyte generation is dominant and larger than the gametophyte generation. Ferns produce one type of spore, and the gametophyte generation grows outside of the spore wall.Horworts: Hornworts also have free-living gametophytes and free-living sporophytes. The sporophyte generation is dominant and larger than the gametophyte generation. Hornworts produce one type of spore, and the gametophyte generation grows outside of the spore wall.Mosses: Mosses have free-living gametophytes and free-living sporophytes. The sporophyte generation is dominant and larger than the gametophyte generation. Mosses produce one type of spore, and the gametophyte generation grows outside of the spore wall.Liverworts: Liverworts also have free-living gametophytes and free-living sporophytes. The sporophyte generation is dominant and larger than the gametophyte generation. Liverworts produce one type of spore, and the gametophyte generation grows outside of the spore wall.Therefore, the correct answers are: Ferns, Hornworts, Mosses, and Liverworts.
Learn more about Gametophytes at
brainly.com/question/26464709
#SPJ4
____________are proteins that bind to the core promoter near the start point for transcription and are involved in the recruitment of RNA polymerase II.
Answers
Transcription factors are proteins that bind to the core promoter near the start point for transcription and are involved in the recruitment of RNA polymerase II.
What are Transcription factors?The promotion of gene expression is reliant on the presence of specific proteins called transcription factors that bind to certain DNA molecules located in a target gene's promoter region.
These regulators are vital for governing various biological processes like embryonic development, tissue differentiation, and response mechanisms towards molecular signals from their surroundings.
Through their interactions with RNA polymerases or recruitment of co-regulating agents to the relevant machinery, transcription factors modify expression rates based on their activation-repression tendencies.
Learn about Transcription factors here https://brainly.com/question/30972786
#SPJ1