Answer:
c
Explanation: hope it helped
penicillin is an antibiotic that kills bacteria by binding to the active site of an enzyme involved in synthesis of the bacterial cell wall. which of the following phenomena best describes the mechanism of action of penicillin? penicillin is an antibiotic that kills bacteria by binding to the active site of an enzyme involved in synthesis of the bacterial cell wall. which of the following phenomena best describes the mechanism of action of penicillin? noncompetitive inhibition competitive inhibition allosteric regulation feedback inhibition
The phenomenon that best describes the mechanism of action of penicillin is competitive inhibition.
In the field of biology, competitive inhibition can be described as a phenomenon in which a molecule that is similar to the actual substrate binds to the active site rather than the actual substrate. As the actual substrate and the molecule are similar hence they both can fit into the active site.
The antibiotic, penicillin, uses this phenomenon to kill the bacteria. The components of the antibiotic bind to an active site for the enzyme that is responsible for making the cell wall of the bacteria.
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a certain badger is heterozygous for two genes; he has sharp claws and bad breath. he mates with another badger that is homozygous for both genes, with sharp claws and minty-fresh breath. what are the chances that they have an offspring with sharp claws and minty-fresh breath? (assume simple, mendelian inheritance.)
The chances of offspring to have sharp claws and minty fresh breath is 50% since one parent has (Tt) and other has (TT) . The offsprings would be TT, Tt, TT, and Tt..
What is Mendelian inheritance?The term "Mendelian inheritance" refers to specific patterns that can be observed in the way characteristics are passed down from parents to children. In the 19th century, the Austrian monk Gregor Mendel conducted thousands of tests with pea plants in order to develop these broad patterns. He did this in order to determine the genetic makeup of pea plants.
Law of Dominance is one of Mendel's three proposed laws of inheritance, which also includes Law of Inheritance. The law that enforced segregation. The Principle of Independent Assortment is a Law.
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when a decrease in blood pressure is detected by the central nervous system, the central nervous system triggers several changes that will return the blood pressure to its set point. this is an example of
When the central nervous system detects a drop in blood pressure, it initiates a series of changes that return the blood pressure to its normal level. This is an illustration of negative feedback.
What detects blood pressure changes and allows the nervous system to respond?
Baroreceptors (or venta trial stretch receptors) are pressure sensors in the heart's right atrium that detect changes in blood pressure and volume when it returns to the heart. Those same receptors transmit information to the central nervous system via the vagus nerve (10th cranial nerve).
Baroreceptors detect decreased arterial pressure and initiate a sympathetic response. Due to this, the heartbeat and cardiac contractility speed up, raising blood pressure in the process.
Therefore, the central nervous system triggers several changes that will return the blood pressure to its set point in negative feedback.
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What is the primary difference between alcohol fermentation in yeast and lactic acid fermentation in muscle cells?.
The primary difference between alcohol fermentation and lactic acid fermentation is that alcohol fermentation yields carbon dioxide and ethyl alcohol, whereas lactic acid yields molecules of lactic acid from pyruvate.
A metabolic process in which glucose is transformed into the metabolite lactic acid fermentation lactate and energy in cells bacteria like Lactobacillus and yeast typically perform lactic acid fermentation.
It takes place in two main stages: fermentation and glycolysis. The cytosol is the site of both lactic acid fermentation and glycolysis. The metabolic process by which glucose is transformed into ethanol and carbon dioxide is referred to as alcoholic fermentation.
Yeast and a few other bacteria do most of the work. In the absence of oxygen, alcoholic fermentation also takes place in the cytosol.
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When the temperature rises, atoms and molecules move faster and collide, creating thermal energy (also known as heat energy). Thermal energy is the energy that results from the heated substance's temperature.
What is thermal energy?The atoms and molecules that make up matter are always in motion. The increase in temperature caused by heating a substance causes these particles to accelerate and collide.
The energy that arises from a heated substance is referred to as thermal energy. The more the substance's thermal energy and the more its particles travel at higher temperatures.
When the temperature rises, atoms and molecules move faster and collide, creating thermal energy (also known as heat energy). Thermal energy is the energy that results from the heated substance's temperature.
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What are the different functions of the pancreas, and how is the pancreas directly related to digestion?.
The pancreas are associated with both exocrine and endocrine functions and they are directly related to digestion as they secrete pancreatic juice into the small intestine.
Pancreas is the organ whose major function can be characterized as the conversion of energy in the food into a form that can be used by the body of an organism.
The endocrine function of the pancreas is associated with regulating the sugar levels in the blood. On the other hand, the exocrine function of the pancreas is associated with the digestion process.
Pancreas is directly related to the digestion process because pancreatic juice is released into the duodenum region of the small intestine. The pancreatic juice contains digestive enzymes for the breakdown of food.
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an advantage to having ether-linked membrane lipids is that ether links choose one: a. use less cellular carbon, saving energy. b. allow cyclic rings to form. c. do not require an enzyme to form. d. are more stable and less likely to break.
An advantage to having ether-linked membrane lipids is that ether links are more stable and less likely to break.
Ether lipids are a distinct kind of glycerophospholipids that have an ether bond connecting an alkyl chain to the sn-1 position. In ether lipids, the alcohol moiety linked to the phosphate group is typically choline or ethanolamine, though inositol or serine have also been noted on occasion.
Because archaeal membranes naturally function in a wide range of temperatures, they typically do not need to modify their lipid composition to temperature changes in the same way that bacteria do.
The ether-linkage gives the membrane increased chemical stability. The side chains themselves, which are unbranched fatty acids in bacteria and eukaryotes and isoprenoid chains in archaea, account for the third and fourth differences. Branching side chains may be present in these isoprenoid chains.
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How do viruses cause damage to host cells they infect?
I think it is Option B.
Explanation:A virus must use cell processes to replicate. The viral replication cycle can produce dramatic biochemical and structural changes in the host cell, which may cause cell damage. These changes, called cytopathic (causing cell damage) effects, can change cell functions or even destroy the cell.
Answer:
I think the answer for that question is B
An insertion sequence contains a large deletion in its transposase gene. Under what circumstances would this insertion sequence be able to transpose?.
There is another transposable element of the same type present in the cell and it expresses a functional transposable enzyme.
A transposase is any of a class of enzymes able to bind to the top of a transposon and catalyze its movement to any other part of a genome.
A transposase is any of a class of enzymes able to bind to the cease of a transposon and catalyze its motion to any other part of a genome, commonly through a cut-and-paste mechanism or a replicative mechanism, in a manner known as transposition.
Transposases are enzymes that become aware of the inverse terminal repeat sequences within the DNA and continue to bind and excise the DNA transposons among the terminals.
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using the key choices, characterize the following statements relating to long bones. enter the appropriate term(s) or letter(s) in the answer blanks. key choices: diaphysis c. epiphysis e. yellow marrow cavity epiphyseal plate d. red marrow
Epiphysis, Diaphysis, Red marrow, Diaphysis, Yellow membrane cavity, epiphyseal plate are the characteristics of the long bone.
Long bones are tough, dense bones that offer stability, movement, and strength. The femur, or thigh bone, is a long bone. A long bone has two ends and a shaft. Despite their small lengths, some of the fingers bones are categorized as long bones.
The characters of long bones are:
Epiphysis is the Site of spongy bone in adult.Diaphysis is the Site of compact bone in the adult.Red marrow is the Site of hematopoiesis in the adult bone.Diaphysis is the Scientific name for bone shaft.Yellow membrane cavity is the Site of fat storage in the adult.Epiphyseal plate is the site of longitudinal growth in a child.To know more about bones visit the link:
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What 2 events in nature can hinder the process of carbohydrate production? Explain your answer. Use the sentence frame: “___ can hinder carbohydrate production because ____.”
Stormy weather and very low temperature events in nature can hinder the process of carbohydrate production because some plants may grow more quickly under conditions of moderate heat and increased atmospheric carbon dioxide.
The carbohydrate production is caused by the photosynthesis.
Photosynthesis- The process through which some species of living things and plants transform sunlight into energy. Green plants collect and use light energy during photosynthesis to convert water, carbon dioxide, and minerals into organic molecules rich in oxygen and energy (glucose).
This mechanism primarily provides energy to the planet's life systems. By the norms of human engineering, it is not particularly effective, but it gets the job done.
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Name and explain four types of changes in chromosome structure.
Solution:
The four types of chromosomal structural abnormalities can be grouped into the following two groups:
Balanced structural anomalies:
1. Translocations: simple or complex movement of chromosome fragments or whole chromosomes. Chromosome breaks and a part of it is attached to a different chromosome.
2. Inversion: where the chromosomal region is flipped so that it points in the opposite direction. That is, part of a chromosome breaks off at two points and the segment in between turns upside down and then rejoins the same chromosome.
Unbalanced structural anomalies:
3. Duplication: where part of a chromosome is copied. This means that a part of the chromosome is duplicated or has two copies. The result is additional chromosomal material.
4. Deletion: where part of a chromosome is removed. That is, there is DNA loss.
The five types of cells found in the epidermis are stem cells, keratinocytes, tactile cells, dendritic cells, and?.
Describe how the light-dependent and light-independent reactions work together in photosynthesis
According to the research, in photosynthesis, through the light-dependent reactions energy is contained in the NADPH and ATP molecules that is used by light-independent reactions.
What is photosynthesis?It is the process that converts solar energy into chemical energy which, stored in cells, allows the formation of carbohydrates and other organic molecules.
In this sense, the light-dependent reactions occur in the thylakoids whose chemical energy is comprised of molecules of two types NADPH and ATP.
On the other hand, light-independent reactions occur in the chloroplast matrix with the intervention of enzymes that intervene in the reduction of CO2 molecules to establish carbohydrates through the energy sources ATP and NADPH.
Therefore, we can conclude that the light-dependent reactions in photosynthesis manufacture ATP and the reducing source NADPH necessary for light-independent reactions.
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Excitability is the ability of a cell to receive and respond to stimulus by changing its membrane potential. True or false?.
True Excitability is the ability of a cell to receive and respond to stimulus by changing its membrane potential.
What is Excitability ?The capacity to react to a stimulus, which may be from a motor neuron or a hormone, is known as excitability. The capacity of a muscle to be stretched is known as extensibility.
The muscle cell membrane's ion permeability qualities are momentarily altered by a neurotransmitter. Each muscle fibre in a muscle contracts once a motor neuron has activated.Every living thing reacts to stimuli. Anything that can cause a live entity to physically or behaviorally change is referred to as a stimulus. Excitability is hence an organism's capacity to react to environmental stimuli.Learn more about Excitability here:
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why must the viruses enter host cells
A. they are pathogens and seek to infect others
B. They are to small to survive on their own
C.They cannot reproduce on their own
D. They cannot catch food on their own
Answer: C. They cannot reproduce on their own
Explanation:
Viruses enter the cell via endocytosis because they lack the machinery required to reproduce.
They transfer the genetic material to the host cell which causes the cell to create the virus.
All cells require energy because all cells are constantly
PLSSS HELP IF YOU TURLY KNOW THISS
Answer:
A right temperature
Explanation:
Only because you need warm air and wet but not too wet soil you don’t want you plant to drown and freezing temperatures will make it hard and when transferring the plant it will break, and flower petals make no sense.
How does the structure of DNA allow it to store hereditary information?
The structure of DNA allows it to store hereditary information due to the presence of Adenine (A), thymine (T), cytosine (C), and guanine (G).
Adenine (A), thymine (T), cytosine (C), and guanine (G) are sugar bases that are sequenced in the DNA responsible for storing genetic information. These bases are connected by ribbons of sugar-phosphate molecules to form a double helix.
Because of its distinct structure, DNA may duplicate itself during cell division. The DNA helix divides into two separate strands when a cell is getting ready to divide. Two new, double-stranded DNA molecules are created using these single strands as templates, each of which is a copy of the original DNA molecule.
What are the components of DNA?
Nucleotides are chemical building units that makeup DNA. A phosphate group, a sugar group, and one of four different nitrogen bases make up these building components. Nucleotides are joined together into chains, with the phosphate and sugar groups switching positions, to produce strands of DNA.
Therefore, sugar bases present in DNA help it store hereditary information.
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Which of the following characteristics is the most desirable for constraining the relative age of rocks?
answer: organisms with overlapping ranges and geologically short lifespans
The most desirable characteristic for constraining the relative age of rocks: organisms which exhibit overlapping ranges as well as have short lifespans in geological terms.
Relative age is a term used to describe the age of a particular rock formation compared to other rock formations.
The question is incomplete. The complete question is:-
Which of the following properties is most desirable to constrain the relative ages of rocks?
Hints:-
Organisms displaying overlapping ranges as well as short geological lifespans,
Organisms which do not display overlap in range,
Organisms that display overlap in range as well as have long geological lifespan,
Organisms which have soft bodies and are microscopic in nature,
Organisms that display long periods of geologic time.
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both parents are heterozygous for tay-sachs disease (an autosomal recessive disorder). three children in a row were born with tay-sachs disease. what is the chance that a fourth child will have tay-sachs disease? group of answer choices 25% 0% 50% 75% 100%
The correct answer is 25%. We shall use "T" to denote the dominant normal (non-TS) allele and "t" to denote the recessive (TS) allele.
The genotype "Tt" indicates that both parents are heterozygous, which means they each have one dominant allele and one recessive allele, making them both carriers for the condition. According to reports, three of their kids have Tay-Sachs. Only 25% of the time will a kid from a cross between these parents be homozygous recessive "tt". Every pregnancy will continue to have the same chance of success. There is still a 25% possibility that another child will also have Tay-Sachs if the parents have 10 Tay-Sachs-affected children.
A rare genetic disease called Tay-Sachs is passed from father to son. It is caused by a lack of an enzyme that helps break down fatty compounds. These fatty compounds, known as gangliosides, build up in the brain and mix to dangerous levels, affecting nerve cell function. In the first three to six months of life, Tay-Sachs babies often develop as expected. They eventually lose the ability to see, hear and move between a few months and a few years. Most people start having seizures by age 2. Unfortunately, children with this disease usually do not survive 5 years.
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Limiting the intake of saturated fat, cholesterol, and trans fat helps to decrease the risk of heart disease. The 2020-2025 dietary guidelines for americans recommends saturated fat be limited to what amount of total calories?.
To further reduce your heart disease risk, limit saturated fats to less than 7% of your total daily calories.
Dietary fats include saturated fat. Along with trans fat, it is one of the harmful fats. Most of the time, these fats are solid at room temperature. High quantities of saturated fat are found in foods like butter, cheese, red meat, palm and coconut oils, and butter.
The following suggestions are from the American Dietary Guidelines for 2015–2020:
No more than 25% to 30% of your daily calories should come from fat.Aim to consume no more than 10% of your daily calories from saturated fat.Reduce your intake of saturated fats to under 7% of your daily calorie intake to further lower your chance of developing heart disease.Here is another question with an answer similar to this about saturated fats: https://brainly.com/question/11261140
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unstable plaque, a condition of atherosclerotic heart disease, occurs in unstable angina and myocardial infarction. unstable plaque can rupture, causing platelet aggregation and thrombus formation. what are the major determinants of the vulnerability of plaque to rupture? select all that apply.
Due to ongoing inflammation, collagen degradation (linked to macrophages), lipid buildup (core development), weakening of the cap, and delayed healing and repair (smc-related).
What causes aggregation of the platelets?Collagen, ristocetin, arachidonic acid, adenosine 5′-diphosphate, adrenaline, and thrombin are examples of substances that can excite platelets and subsequently cause aggregation. A diagnostic pattern for various abnormalities of platelet function is provided by the response to these aggregating drugs (also referred to as agonists).
Which medication stops platelet aggregation?The most popular antiplatelet medication, aspirin, alters the ratio of prostacyclin to thromboxane, which prevents platelet aggregation (that promotes aggregation). In high-risk patients, aspirin effectively lowers the risk of cardiovascular events. Aspirin's primary known effect on hemostasis is to suppress platelet thromboxane A2 production, which reduces platelet aggregation.
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a mutant e. coli cell expresses z, y, and a genes at the same levels in the presence and absence of lactose. these levels correspond to those observed in wild-type e. coli cells in the presence of lactose. which region of the dna could contain the mutation?
The i gene region of the dna could contain the mutation. The i gene codes for the repressor of the lac operon.
The repressor of the lac operon is encoded by the I gene. The hydrolysis of the lactose disaccharide into its monomeric components, galactose and glucose, is predominantly carried out by the enzyme -galactosidase, which is encoded by the Z gene.
Most repressor binding site mutation result in decreased repressor affinity and thus reduced binding. Thus, these changes enable constitutive expression, which allows the lac operon to continue to be transcribed (and subsequently expressed) even in the absence of an inducer.
Therefore, the i gene region of the dna could contain the mutation. The i gene codes for the repressor of the lac operon.
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Iin the wavelength and photosynthesis experiment, what is the purpose of the beaker left in the dark?.
The dark beaker is a control because it contains all of the experiment components, but photosynthesis should not occur in the absence of light.
One of the beakers should be covered to prevent light from reaching the leaf discs. Place the second beaker approximately 15 centimeters from a light source. As soon as the light is turned on, start timing the experiment.
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the components of a cell and the arrangement of these individual parts within the cell form the cellular________
Answer: A cell consists of three parts: the cell membrane, the nucleus, and, between the two, the cytoplasm. Within the cytoplasm lie intricate arrangements of fine fibers and hundreds or even thousands of miniscule but distinct structures called organelles.
On your whiteboard, and without the help of your textbook or the internet, sketch what a cell looks like. Draw whatever you can remember about a cell and label it.
To draw a cell we have to consider that they are formed by different organelles and structures. Between plant and animals cells those structures share similitudes and differences in terms of whether they are present or not. One of the main differences between these two kinds of cells is the cell wall present in plant cells, and the absence in animal cells, which gives a rigid aspect to the former ones, with respect to the latter.
We can notice that there are evident differences, like the presence of centrioles in animal cells, and the presence of chloroplast in plant cells. In plants, we can also find large vacuoles than in animal cells.
you should of underline leaf becase that was the anser
Answer:
what?
Explanation:
if you know the npp for an ecosystem, what additional variable do you need to know to estimate the nep? why might measuring this variable be difficult, for instance, in a sample of ocean water?
From estimates of NEP, you need to measure the respiration of all organisms in an ecosystem, not just the respiration of primary producers.
In a sample of ocean water, primary producers and other organisms are usually mixed together, making their respective respiration's hard to separate.
What is npp of an ecosystem?
The rate of energy lost to metabolism and maintenance is subtracted from gross primary productivity to arrive at net primary productivity, or NPP. In other words, it's the rate at which energy is released to consumers in the ecosystem from primary producers such as plants and animals and stored as biomass.
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1. What 2 events in nature can hinder the process of carbohydrate production? Explain your answer. Use the sentence frame: “___ can hinder carbohydrate production because ____.”
The answers include the following below:
Stormy weather can hinder carbohydrate production because of inadequate sunlight.Low temperature can hinder carbohydrate production because of low heat.What is Carbohydrate?This is referred to as a compound which helps in the provision of energy when it is broken down by enzymes and is formed during photosynthesis through the use of water and carbondioxide as the reactants.
Stormy weather and low temperature can hinder carbohydrate production because of inadequate sunlight. Photosynthetic reaction by plants, requires the use of adequate sunlight as it is converted into this compound thereby making it the correct choice.
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