How many distinct tetrapeptides can be made from the four amino acids: leucine, histidine, alanine, and valine? each amino acid may be used more than once.
Answers
256 tetrapeptides can be made from the four amino acids: leucine, histidine, alanine, and valine. It makes use of the concept of Permutation and Combination.
A peptide bond is the covalent bond that paperwork among amino acids, linking them together.
A dipeptide has 2 amino acids bonded collectively; a tripeptide has three amino acids, and a tetrapeptide has 4 amino acids.
In this example, tetrapeptides talk to polypeptides made from four amino acid subunits. this can mean that there are four available empty spaces if you want to slot within the distinct amino acids in a while:
since there are 4 distinct amino acids to be had, and for Biology, we usually take it as a case where the amino acids positioned may be repeated, there are four(four)(4)(four) unique combinations for the institution of four amino acids.
subsequently, the range of wonderful tripeptides possible = \(4^{4}\) = 256
Amino acids are organic compounds that contain both amino and carboxylic acid functional groups.
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Related Questions
How does absolute age relate to geologic time?
Answers
the age of Rock in years is called its absolute age geologist find absolute age by measuring the amount of certain radioactive elements in the rock
in humans, brown eyes are dominant to blue and brown hair is dominant to blonde. Cross a homozygous dominant brown-eyed blonde man, with a blue-eyed and heterozygous brunette women.
Answers
A blue-eyed, heterozygous brunette woman and a brown-eyed, homozygous dominant blonde man. The child would almost certainly have blonde hair and brown eyes.
An heterozygous dominant is what?As contrasted to being homozygous, heterozygosity has two different alleles. You received several incarnations of your parents. In a dominant phenotype, the dominant allele triumphs over disadvantaged one. The dominant trait will consequently show up.
Is YY dominant homozygosity present?One chromosome from every chromosome pair is passed down by each parent. The qualities of a person are the same for both alleles. They could be homozygous dominant (HD) or genetically different (HR) (YY). The notation tt represents the homozygous state, in which the homologous pair contains the same variations of a gene.
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Describe how environmental change can impact ecosystem stability
Answers
Answer:
Environmental change results in the environmental ecosystem to be able to adapt to a new environment to survive the impact of environmental change can cause a decrease in the amount of organisms living in that ecosystem and without one of the organism living in the ecosystem the other organism supports on the other organism for food/energy will be scarce resulting in a decrease of species eventually dying out.
Which of the following best represents a simple food chain?
A. Plant carnivore herbivore
→
OB. Herbivore→ carnivore- plant
C. Plant herbivore carnivore
O D. Carnivore → herbivore → plant
→
SUBMIT
Answers
c
its just simple and makes sense.
Think of it like which species go from strongest to weakest.
According to the video, what are common tasks performed by Nursery and Greenhouse Managers? Check all that apply.
1 performing scientific experiments
2 hiring and training new workers
3teaching classes about plant care 4supervising the placement of plant stock 5performing safety inspections
6 supervising nursery workers
Answers
The common tasks are hiring and training new workers, teaching classes about plant care, supervising the placement of plant stock.
Common tasks performed by Nursery and Greenhouse ManagersHiring and training new workers, do teaching classes about plant care, supervising the placement of plant stock, performing safety inspections of plants in the facility and supervising nursery workers are the common tasks.
These above activities are performed by Nursery and Greenhouse Managers. These tasks are very important for the betterment of the facility and the plants present in it.
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Answer:
hiring and training new workers
supervising the placement of plant stock
supervising nursery workers
Explanation:
I NEED THIS QUCIK The offspring produced by asexual reproduction
a, are genetically identical
to the parent
b, are genetically different from the parent
c, have half as much DNA from the parent
d, get half of their DNA from each parents
Answers
Answer:
d.
Explanation:
im working on this unit rn in school too
Help if you can no links please
What happens at a cell cycle checkpoint?
Answers
Answer:
If the checkpoint mechanisms detect problems with the DNA, the cell cycle is halted, and the cell attempts to either complete DNA replication or repair the damaged DNA. If the damage is irreparable, the cell may undergo apoptosis, or programmed cell death 2.
Explanation:
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Calcium, magnesium, and strontium are near each other on the periodic table and have some characteristics in common, but they differ in chemical reactivity. Which lists these metals in order from most reactive to least reactive?
A. calcium, magnesium, strontium
B. magnesium, calcium, strontium
C. strontium, calcium, magnesium
D. strontium, magnesium, calcium
Answers
Answer:
B
Explanation:
Answer:
strontium calcium magnesium
Explanation:
magnesiums atomic number is 12
calciums is 20
strontium is 38
imagine that an ecosystem contains rabbits, foxes, wolves, and deer. the following predator-prey relationships exist:
Answers
Therefore, predator-prey relationships play a significant role in maintaining the balance and health of an ecosystem.
In the given ecosystem, there are predator-prey relationships between rabbits and foxes, foxes and wolves, and wolves and deer. The rabbits are the prey for the foxes, while the foxes are the prey for the wolves. The deer, on the other hand, are the prey for the wolves. These relationships are crucial for maintaining the balance in the ecosystem. If the foxes were to disappear, the rabbit population would increase, and they could overgraze the vegetation, leading to a decrease in food availability for other animals. This could eventually lead to the decline of the rabbit population due to starvation or disease. Similarly, if the wolves were to disappear, the deer population would increase, which could lead to overgrazing and a decline in vegetation, affecting the entire ecosystem.
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Sometimes a base substitution mutation results in the synthesis of the same protein.
Predict what would be the function of the protein if the mutated gene coded for the same
amino acid sequence?
Answers
If a base substitution mutation occurs in a gene but still codes for the same amino acid sequence, it is known as a silent mutation.
In this case, the function of the protein is expected to remain unchanged. This is because the genetic code is degenerate, meaning that multiple codons can code for the same amino acid.
During protein synthesis, the sequence of nucleotides in the gene is transcribed into a messenger RNA (mRNA) molecule, which is then translated into a protein.
Each set of three nucleotides, called a codon, corresponds to a specific amino acid.
There are multiple codons that can code for the same amino acid due to redundancy in the genetic code.
If a base substitution mutation occurs in a codon, but the resulting codon still codes for the same amino acid, the protein's primary structure remains unchanged.
Since the function of a protein is determined primarily by its three-dimensional structure, a silent mutation is not expected to significantly alter the protein's function.
However, it is important to note that some mutations, even if they do not change the amino acid sequence, can affect other aspects of gene regulation or protein production.
These effects may impact protein expression levels, protein folding, or protein interactions, which could indirectly influence protein function.
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mycoplasmas are pleomorphic because they: group of answer choices exhibit snapping division. have no cell walls. are low g c content gram-positive bacteria. produce endospores. have sterols in their cytoplasmic membranes.
Answers
Mycoplasmas are pleomorphic because they don't have cell wall.
The mycoplasmas are classified as pleomorphic micro-organisms because they lack cell wall and they are also incapable of froming colonies on agar plate .
Mycoplasma is a pleuropneumonia like organism that are capable of changing their shape and size in accordance to the external environment in which they are surviving . They are the smallest living organisms identified and can also move across bacteria-impermeable spaces. Mycoplasma are termed as Jokers of the plant kingdom. Mycoplasma pneumoniae bacteria are responsible for causing mild infections of the respiratory system.
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Human brain cells do not use fermentation.explain why a lack of oxygen for even a short period of time might result in the death of brain cells
Answers
Answer:
Brain cells are very sensitive and when they do not have oxygen they slowly start dying off which leads to brain damage.
Explanation:
Glycolysis produces important electrons and ATP which allow cellular respiration and fermentation to occur.
Brain produce ATP by glycolysis is the only process to generate energy, if anaerobic condition brain cells get dead.
What is fermentation?Since oxidative phosphorylation cannot make ATP in the absence of oxygen, glycolysis takes over as the cell's main source of ATP.
Because it supplies cells for the glyceraldehyde-3-phosphate dehydrogenase reaction, which comes before the steps that produce ATP, lactic acid fermentation is significant.
The adult brain only has a finite quantity of anaerobic glycolysis energy and time to sustain ion homeostasis and other vital activities before multiple events take place that cause brain cell damage and death.
Therefore, brain cells only depend on aerobic glycolysis for energy production.
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state 2 ways in which the lining of the bronchus of the smoker differs from that of the non-smoker
Answers
How does point mutation affect the amount of DNA?
Answers
The point mutation can alter the amount of DNA sequences depending upon the type of mutation.
A point mutation is a type of mutation in which the DNA or RNA, the organism's genetic material, is altered by the addition, deletion, or modification of a single nucleotide base. The amount of DNA is unaffected by base substitution since the nucleotide count is unaffected after the substitution. The amount of DNA grows with insertions and mutations because there are more nucleotides involved, whereas it decreases with deletion mutations. A common example of substitution point mutation is sickle cell anemia.
Hence, the type of point mutation determines the amount of DNA.
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Which of these pairs does not correctly match a carbohydrate with its function?
Answers
Of the available options, the first one states that cellulose is a structural part of the hair, this is not correct for several reasons, first cellulose is a biopolymer characteristic of cellular walls in plants, and it's not present in animal cells, secondly human hair is formed mainly of keratin a protein, therefore their basic units are amino acids, not carbohydrates. Therefore taking this into consideration, the correct answer is option 1.
An interesting phenomemon occors in plants that are withering: when watered they "perk up" or stand up. this is eveidence of a plant needing water. what organelle in a plant do you think is most asscociated witht this phenomenon?
Answers
Answer:
The Vacuole is the answer
What is the function of steroids? Choose the best answer.
A)They are only cell membrane stabilizers.
B)They have many functions, including being an energy source.
C)They only regulate the immune system.
D)They have many functions, including endocrine signals.
pls quickly I had to make another account so katie wouldn't ban me
Answers
the answer should be D
Describe the purpose of DNA simple words
Answers
Answer:
DNA is what stores information that is necessary for cells and organisms to function correctly.
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which of the following is true for eukaryotic cells? choose one: sugars are converted to acetyl coa, but fats are not. sugars are converted to acetyl coa in the mitochondria; fats are converted to acetyl coa in the cytosol. sugars and fats are both converted to acetyl coa in the mitochondria. fats are converted to acetyl coa, but sugars are not. fats are converted to acetyl coa in the mitochondria; sugars are converted to acetyl coa in the cytosol.
Answers
Sugars and fats are both converted to acetyl CoA in the mitochondria is true for eukaryotic cells.
What is the procedure by which glucose is converted to acetyl CoA?
During glycolysis, glucose is split into two pyruvate molecules, each of which has three carbons. The oxidative decarboxylation of pyruvate, which is catalysed by the mitochondrial pyruvate dehydrogenase complex, results in acetyl-CoA, a two-carbon acetyl unit ligated to the acyl-group carrier CoA.
Where in eukaryotes does acetyl CoA production take place?
The citric acid cycle and glycolysis are connected through acetyl-CoA. Pyruvate must first pass the mitochondrial membrane because this process occurs in the mitochondrial matrix, the deepest compartment of mitochondria, in eukaryotes. The reaction occurs in the cytoplasm of prokaryotes.
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In the case of the hypoaxemia due to Acute Respiratory Distress Syndrome (ARDS) causing decrease in lung volume. Suggest the mechanical ventilation therapy mode for this condition. [Dalam keadaan "hypoaxemia" kerana "Acute Respiratory Distress Syndrome' (ARDS) menyebabkan pengurangan dalam isipadu paru-paru. Cadangkan mod terapi ventilasi mekanikal untuk keadaan ini.]
Answers
The mechanical ventilation therapy mode for Acute Respiratory Distress Syndrome (ARDS) is volume-controlled ventilation (VCV). The term "hypoaxemia" refers to a low level of oxygen in the arterial blood.
The use of mechanical ventilation is required for the majority of patients with ARDS. Volume-Controlled Ventilation (VCV) mode is one of the most widely used modes of mechanical ventilation for ARDS. A type of mechanical ventilation that limits the tidal volume is called Volume-Controlled Ventilation (VCV) mode.
The tidal volume is the volume of air inspired and expired during one breath. In this mode of ventilation, the respiratory rate, inspiratory flow rate, and tidal volume are set. This mode of ventilation maintains the set tidal volume by adjusting the inspiratory pressure based on lung compliance. The other types of mechanical ventilation are Pressure-Controlled Ventilation (PCV) mode and High-Frequency Oscillatory Ventilation (HFOV) mode, but they are not as commonly used as VCV mode for ARDS.
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4. Exercise 3.4. Genetic Testing and Insurance Prices. Suppose the likelihood that a person will get disease X is determined in large part (but not exclusively) by his or her genes. Initially, it Is impossible to determine who carries the gene for the disease, and many people spend $500 on special health insurance to cover the costs of treatment for the disease. Suppose scientists uncover the gene responsible for the disease and develop a simple test for the gene. (Related to Application 3.) a. Suppose the government passes a law that prevents insurance companies from getting the results of a customer's genetic test for X. Will the new price of X insurance be greater that or less than $500 ? b. Suppose insurance companies have access to the results of genetic tests and they require all customers to get the test. How will the insurance company change its price of X insurance?
Answers
The first scenario's price of X insurance will be greater than $500, while the second scenario's price of X insurance depends on the results of the genetic test.
a) If the government passes a law that prevents insurance companies from getting the results of a customer's genetic test for X, the new price of X insurance will be greater than $500.
b) If insurance companies have access to the results of genetic tests and they require all customers to get the test, the insurance company will change its price of X insurance as follows: if the test shows that a customer has the gene, the insurance company will raise the price of insurance to $800 to cover the expected treatment cost of $10,000 (with probability 1). In contrast, if the test shows that a customer does not have the gene, then the insurance company will lower the price of insurance to $100 to cover only administrative costs, assuming there is no risk of developing the disease.
According to these two scenarios, the first scenario's price of X insurance will be greater than $500, while the second scenario's price of X insurance depends on the results of the genetic test.
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A change in body temperature will have which of the following effects on enzymes in the body?
O A change in the ability of some enzymes to bind with their coenzymes
A change in the ability of some enzymes to bind with their substrate
A reduction in the concentration of some enzymes in the body
An increase in the concentration of some enzymes in the body
Answers
Answer:
A reduction in the concentration of some enzymes in the body
Explanation:
As temperature is increased the enzymes and substrate gain kinetic energy (move more quickly). This increases the frequency of collisions and the formation of enzyme-substrate complexes. Therefore as the temperature is increased the enzyme activity and the rate of reaction increases.
Increases in temperature increase molecular activity, and can result in a higher rate of collisions between enzymes and substrates. If the temperature rises too high, however, the enzymes could become denatured, and the positive effects of the temperature increase could be nullified.
Can anyone tell what phases the cells that are labeled are in?
My teacher put such a blurry picture and expects us to be able to see.
Telophase, Anaphase, Interphase, Prophase, or Metaphase
Answers
During interphase, which is the longest phase of the cell cycle, the cell prepares for division by replicating its DNA and other cellular components.
Prophase is the first stage of mitosis, during which the chromosomes condense and become visible. The nuclear membrane also breaks down, allowing the chromosomes to move freely in the cell
In metaphase, the chromosomes line up along the center of the cell, called the metaphase plate. This is a critical phase because it ensures that each daughter cell will receive the correct number of chromosomes during division.
Anaphase is the stage in which the sister chromatids separate and are pulled towards opposite ends of the cell by the spindle fibers. This phase is characterized by the visible movement of the chromosomes.
Finally, in telophase, the chromosomes reach the opposite ends of the cell and begin to decondense. A new nuclear membrane also forms around each set of chromosomes, marking the end of mitosis.
Based on these descriptions, you should be able to identify which phase each labeled cell is in. If the chromosomes are still lined up at the center of the cell, it's likely in metaphase. If the chromosomes are visibly separating, it's probably anaphase. And if the chromosomes are decondensing and a nuclear membrane is reforming, it's likely telophase.
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A strand of DNA has the sequence GATTACA. What will be the sequence of the complementary strand of DNA?
Answers
Answer:
Pretty sure it is: CTAATGT
I would appreciate some verification but im 75% sure
Explanation:
Crossing over occurs in prophase I of meiosis I. Which is an advantage of crossing over?
Choose the right option:
A) It increases genetic diversity
B) It increases the accuracy of genetic replication
C) It increases the opportunity for mutation
D) It increases the possibility of genetic recombination
Answers
Option A is Correct. Prophase I of meiosis I is when crossing over takes place. Crossing over has the benefit of increasing genetic variety.
When two gametes eventually unite during sexual reproduction, a process known as crossing over produces gametes that contain new gene combinations, maximizing the genetic variety of every offspring that emerges.
During prophase I and metaphase I, a process known as crossing over occurs in which two homologous non-sister chromatids join up and exchange various pieces of genetic material to create two recombinant chromosome sister chromatids. Sexually reproducing organisms have an endless supply of gene diversity thanks to crossing over. It is crucial to evolution and plays a key part in it. Recombination is a mechanism that encourages genetic diversity.
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During the alarm stage of the body’s stress response, what emergency hormone is released to prepare the body to respond to a stressor?.
Answers
Answer:
Adrenaline
Explanation:
Adrenaline is a hormone that prepares the body for "fight or flight"
(a)
Part A
Which statement best explains what caused some theropods to develop feathers?
A
A mutation in DNA affected the types of proteins produced by placodes.
B
A protein in the placodes caused a mutation in the gene that produces feathers.
C
A mutation in the placode gene caused placodes to produce different DNA.
D
A mutation in DNA caused the placodes that control genes to grow feathers.
Answers
Answer:
d
Explanation:
i have a 90 and get 100s in my biology exams going to 10th grade
what do you call heterotrophs that feed at different trophic levels?
Answers
Answer:
They are called decomposers.
Explanation:
what kind of plants grow best in tierra templada
Answers
The Tierra Templada, which translates to "temperate land" or "temperate zone," typically refers to the middle elevation range found in tropical and subtropical regions. It is characterized by mild temperatures and moderate humidity.
The specific plants that grow best in the Tierra Templada will vary depending on the location and specific climate conditions within that region. However, some common types of plants that thrive in the Tierra Templada include:
1. Fruit Trees: Citrus fruits like oranges, lemons, and limes are well-suited to the moderate climate of the Tierra Templada. Other fruit trees such as avocados, apples, pears, and peaches can also flourish in this zone.
2. Coffee: The Tierra Templada is known for its coffee production. Coffee plants thrive in the mild temperatures and higher elevations of this region.
3. Flowers: A variety of flowering plants can be grown in the Tierra Templada, including roses, geraniums, hydrangeas, and lilies. These plants benefit from the moderate temperatures and ample sunlight of this zone.
4. Herbs and Vegetables: Many herbs and vegetables can be successfully cultivated in the Tierra Templada. Examples include tomatoes, peppers, lettuce, basil, parsley, and cilantro.
5. Ornamental Plants: Various ornamental plants, such as ferns, begonias, impatiens, and hibiscus, thrive in the Tierra Templada due to the favorable climate conditions.
It's important to note that the specific plants that grow best in the Tierra Templada may vary based on factors like local soil conditions, rainfall patterns, and altitude.
Local agricultural experts and nurseries can provide further guidance on suitable plant varieties for specific locations within the Tierra Templada.
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Tierra templada is a region characterized by mild temperatures and moderate rainfall, typically found at elevations between 1,000 and 6,000 feet above sea level.
The climate in this region is ideal for a wide variety of plant species, including fruits, vegetables, grains, and ornamental plants.
Some of the most common plants that thrive in tierra templada include avocado, coffee, bananas, strawberries, maize, beans, squash, and tomatoes.
Additionally, many ornamental plants, such as roses, begonias, and geraniums, grow well in this region.
Due to the moderate temperatures and rainfall, tierra templada is also suitable for many types of trees, including oak, pine, and cedar. These trees provide habitat for a diverse array of wildlife, including birds, mammals, and insects.
Overall, tierra templada's favorable climate allows for a rich diversity of plant life, making it an important region for agriculture, horticulture, and conservation.
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Which one is not matter?
(a) Electricity
(b) Paper
(c) Water
Answers
Answer:
A) electricity
Explanation:
Matter is something that occupies space and has mass