How do the molecular formulas for all the amino acids differ?

Answers

Answer 1
The side groups are what make each amino acid different from the others. Of the 20 side groups used to make proteins, there are two main groups: polar and non-polar. These names refer to the way the side groups, sometimes called "R" groups, interact with the environment.
Answer 2

The molecular formulas for all the amino acids differ - the R group or side chain.

Each amino acid has the same molecular structure with a central carbon atom, the alpha (α) carbon, bonded to an amino group (NH2), a carboxyl group (COOH), and to a hydrogen atom.

Each amino acid is exactly the same except for the R group. little side chain represented by the will be different depending on the kind of amino acid.For example, glycine has a hydrogen atom as its R group, whereas alanine has a methyl group (CH3).

Thus, the molecular formulas for all the amino acids differ - the R group or side chain.

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Related Questions

Quick Question: Is water wet?

Answers

ion know lol

..............

Examples of how humans negatively affect local ecosystems are
A. Building dams, deforestation cutting down trees), adding point sources to nearby streams to allow for run-off, building roads and structures, and salting roads
B. Planting trees and other plants to attract native species
C. Creating laws to prohibit fishing from local streams
D. Removing non-native species from the environment.​

Answers

Answer:

A.  Building dams, deforestation cutting down trees), adding point sources to nearby streams to allow for run-off, building roads and structures, and salting roads.

Explanation:

Removing non-native species from the environment helps the native ants to thrive without having any changes in the ecosystem effect them (i.e. new invasive animal).

Creating laws to prohibit fishing from local streams helps keep the fish alive and allowing them to continue to use this stream.

Planting trees and other plants to attract native species helps secure and grow the ecosystem of that area.

This leaves A as the answer.

Hope that helps you!

by the tenth week of embryonic development, the chorion has developed into the ______, which is now secreting hormones that help maintain the pregnancy.

Answers

By the tenth week of embryonic development, the chorion has developed into the placenta, which is now secreting hormones that help maintain the pregnancy.

The placenta is a vital organ that forms during pregnancy and plays a crucial role in supporting the developing fetus. It originates from the chorion, which is one of the early embryonic structures. As the pregnancy progresses, the chorion undergoes significant changes and transforms into the placenta.

The placenta serves as a connection between the developing fetus and the mother, allowing the exchange of nutrients, oxygen, and waste products. It also plays an endocrine role by producing various hormones that are essential for maintaining the pregnancy.

One of the key hormones secreted by the placenta is human chorionic gonadotropin (hCG), which helps support the production of progesterone by the ovaries during the early stages of pregnancy. Progesterone is crucial for maintaining the uterine lining and preventing the shedding of the endometrium, which would result in the termination of pregnancy.

In addition to hCG, the placenta also produces other hormones such as estrogen and progesterone, which further support the growth and development of the fetus and regulate various physiological changes in the mother's body.

Therefore, by the tenth week of embryonic development, the chorion has developed into the placenta, which is now responsible for secreting hormones that help maintain the pregnancy.

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which is not a problem associated with beetle infestations in homes?

Answers

There are several problems associated with beetle infestations in homes, but one problem that is not commonly associated with them is the transmission of diseases. Unlike some other household pests like mosquitoes, ticks, and rodents, beetles do not transmit any diseases to humans.

However, beetle infestations can still be a nuisance for homeowners and may cause damage to the structure and furnishings of the home. Some common problems associated with beetle infestations include:

1. Damage to wood: Certain types of beetles like powder post beetles and wood-boring beetles can cause damage to wooden structures and furniture in homes. They can burrow into the wood and create tunnels, which weaken the structure and make it more susceptible to collapse.

2. Contamination of stored food: Some types of beetles like flour beetles and grain beetles can infest stored food items like flour, cereal, and grains. This can result in contamination of the food and make it unfit for consumption.

3. Allergic reactions: Some people may be allergic to the hairs or spines of certain types of beetles like carpet beetles and may experience allergic reactions like skin rashes, itching, and hives.

In summary, while beetle infestations may not transmit diseases to humans, they can still cause damage to homes and furnishings and contaminate stored food items. It is important to take steps to prevent and control beetle infestations in homes to avoid these problems.

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A cell with 10 chromosomes undergoes mitosis and cell division. How many daughter cells are produced and what number of chromosomes do they have?
a. 2 daughter cells, 5 chromosomes each
b. 1 daughter cell, 10 chromosomes each
c. 4 daughter cells, 20 chromosomes each
d. 2 daughter cells, 10 chromosomes each

Answers

Answer:

Answer:, 2 daughter cells, 10 chromosomes each

is pluto a planet if not why

Answers

Pluto is to all to be planet and is now a dwarf planet

Pluto is a dwarf planet because it did not meet the three criteria the IAU uses to define a full-sized planet. 

what does the circulatory system do for the stomach

Answers

Answer:

The digestive system breaks food down into nutrients such as glucose. Now the circulatory system enters the picture. It transports glucose and other nutrients from the digestive system to the cells. The circulatory system also transports oxygen from the lungs to the cells.

A service to solve the problem of minimizing the number of times that a user has to enter a password and the risk of an eavesdropper capturing the password and using it is known as the __________ .

Answers

The service that can solve the issue of entering passwords frequently and reducing the risk of eavesdropping is called Single Sign-On (SSO).

This solution allows users to access multiple applications and systems with just one set of login credentials. It eliminates the need for multiple passwords and reduces the risk of weak or forgotten passwords. With SSO, the user only has to enter their login credentials once, and it authenticates the user across all the applications and systems they need to access. This saves time, enhances productivity, and enhances security by reducing the risk of password theft or hacking.
The service that solves the problem of minimizing the number of times a user has to enter a password, while also reducing the risk of an eavesdropper capturing the password, is known as Single Sign-On (SSO). SSO allows users to securely access multiple applications or services using a single authentication process. By reducing the need for multiple password entries, it enhances user experience and minimizes the chances of password theft. SSO also helps in maintaining strong security measures as it centralizes the authentication process, making it easier to manage and monitor access to various services.

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One of the scientists is shown gathering hair samples from an uncontaminated wolf den. Why would these samples be useful in studying animal life in the exclusion zone?

Answers

As the hair sample contain DNA of the particular organism, this can help in studying animal life in the exclusion zone.

What is exclusion zone?

An exclusion zone is a location or activity that people are not permitted to enter or perform, for example, because it would be dangerous.

Hair DNA is genetic material that is used to build our hair. "Our hair follicle contains nucleic acid DNA, while our hair shaft contains mitochondrial DNA."

The hair follicle and the hair shaft are the two parts of hair from which DNA can be extracted and isolated.

Because the hair sample contains genetic information means DNA from the specific organism, it can aid in the study of animal life in the exclusion zone.

Thus, the DNA can give all the genetic information regarding the wolf.

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Which of the following is a sustainable farming practice?
A. Avoiding genetically modified crops that need little water and
produce high yields
O B. Adding chemical pesticides to crops until insects evolve to have
pesticide resistance
C. Using an organic method that has a high energy cost and
produces low yields
D. Managing crop pests by promoting natural predator-prey
relationships

Answers

Answer:

D

explanation

since have low cost and need low skills compared to other

Answer:

D. Managing crop pests by promoting natural predator-prey

relationships

Explanation:

Photo proof

cells in seeds are able to withstand damage from extreme desiccation due to _________.

Answers

Cells in seeds are able to withstand damage from extreme desiccation due to a process called desiccation tolerance.

Desiccation refers to the extreme drying out of an organism or its tissues, which can be detrimental to most living cells. However, seeds have evolved unique mechanisms to protect their cells from desiccation damage during periods of dormancy or when exposed to harsh environmental conditions.

One of the key factors that contribute to desiccation tolerance in seeds is the accumulation of specific protective substances, such as sugars (e.g., trehalose and sucrose) and proteins (e.g., late embryogenesis abundant proteins or LEA proteins). These substances help stabilize cellular structures and protect them from dehydration-induced damage.

Additionally, during the process of seed development, the cells undergo changes in their metabolism and gene expression, which enable them to enter a state of quiescence or dormancy. This dormancy state allows the cells to withstand extreme desiccation by slowing down their metabolic activities and entering a reversible state of suspended animation.

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how bases are defined?
Hydrogen proton acceptor
Peroxide ion donor
Hydrogen proton donor
Hydroxide ion acceptor

Answers

The definition of bases is Hydroxide ion acceptor. The correct option is d.

A substance that is a hydrogen proton acceptor is referred to as a base. A base is a substance that contains hydroxide ions, which have a negative charge. The hydroxide ion is a molecule made up of one hydrogen atom and one oxygen atom, with the formula OH. Bases are also defined as peroxide ion donors.

What is a Base?

A base is a substance that can absorb hydrogen ions or donate hydroxide ions in a chemical reaction. This happens as the base accepts a proton (hydrogen ion) and adds it to the molecules, creating a negative ion. It can donate a hydrogen proton and leave a negative ion behind. Base is the opposite of an acid, which is a hydrogen proton donor.

Bases are ionic compounds that, when dissolved in water, create negatively charged hydroxide ions. These negatively charged hydroxide ions are responsible for the base's reactions with acids, creating salt and water as byproducts. A base will, in general, create a slippery feeling in water or on skin, as well as produce a reaction with acid to generate salt and water as byproducts. The pH scale, which ranges from 0 to 14, defines a base as having a pH greater than 7.0.

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dose ever person have a DNA or not and why

Answers

Answer:

everyone has dna becasue our dna tells us to do things

Explanation:

Which of the following best summarizes the events of excitation-contraction coupling?
Muscle action potentials initiate calcium signals that activate a contraction-relaxation cycle.

Answers

Excitation-contraction coupling is the process by which muscle cells (specifically, skeletal and cardiac muscle cells) translate an electrical signal (action potential) into a mechanical response (contraction).

It involves a series of events that ultimately lead to the contraction of muscle fibers. Here is a breakdown An action potential, an electrical signal, is generated in the muscle cell membrane in response to a stimulus, typically from a motor neuron.Calcium release: The muscle action potential travels along the muscle cell membrane (sarcolemma) and into the network of tubules called the sarcoplasmic reticulum (SR). This triggers the release of calcium ions (Ca2+) from the SR into the cytoplasm of the muscle cell.

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Mention ten example of plants​

Answers

Answer:

Herbs.  

Shrubs.  

Trees.  

Climbers.  

Creepers.

trees, grass, moss, flowers, and weeds,

Explanation: ya

Answer:

Trees

Flowers

Moss

Grasses

Algae

Fern

Reeds

Bamboo

Herbs and

Shrubs

Explanation:

Hope this helps

Why is an athlete more likely to win a race than a non-athlete? (Answer needs to be based at cellular level)

Answers

The athletes cells have been trained for the stress of a race, such as the stretching of muscle cells being ready to take in more oxygen.

Explain how temperature is important in ecosystems and the rationale for your choice in this section. Write down relevant notes regarding you design.

Answers

Temperature really can control our days. And what we can or able to do that day. For example, it's raining and it is super windy, and you wanted to go somewhere, in this case lets say the beach. It wouldn't be such a good idea.

the leading modifiable cause of low-birth-weight during pregnancy is:

Answers

The leading modifiable cause of low birth weight during pregnancy is maternal smoking.

Smoking during pregnancy can restrict the baby's growth and development, leading to a higher likelihood of a low birth weight. It is strongly recommended for pregnant women to avoid smoking to reduce the risk of complications.

Maternal smoking refers to the act of a pregnant woman smoking tobacco products. When a pregnant woman smokes, harmful substances from the cigarettes,

Such as nicotine and carbon monoxide, are transferred to the baby through the placenta, potentially causing restricted fetal growth, low birth weight, preterm birth, and other adverse health effects. It is crucial for pregnant women to quit smoking to protect the health of both themselves and their babies.

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What was the effect on the environment of
banning chlorofluorocarbons?

Answers

Ozone layer preservation and a large decrease in global warming were both achieved by an international ban on ozone-depleting substances. The chlorofluorocarbons (CFCs) ozone-depleting compounds were outlawed globally in 1987, preventing a disastrous increase in the amount of ultraviolet radiation (UV) reaching the Earth's surface.

What kind of environmental impact do chlorofluorocarbons have?

Chlorofluorocarbons (CFCs) are a class of artificially produced, odorless compounds. CFCs have been prohibited since 1996 due to the harm they do to the ozone layer of the earth. The biodiversity of the world itself will suffer if the ozone layer is destroyed.

If CFCs had not been prohibited, what would have happened?

CFCs are potent greenhouse gases; according to US studies, if CFC use had continued unchecked, global temperature would have increased by 2°C by the year 2070. Extreme weather, including floods, droughts, hurricanes, and heatwaves, would have been fueled by this.

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A disadvantage of sexual reproduction in plants is

Answers

Answer:

These are some of the disadvantages of sexual reproduction: time and energy are needed to find a mate.

hope this helps!

A disadvantage of sexual reproduction is the fact that ADDITIONAL ENERGY is required to complete a life cycle.

Sexual reproduction can be defined as a type of reproduction that involves a complex life cycle in which germinal haploid cells called gametes combine to produce a diploid (2n) cell called the zygote.

Subsequently, this zygote then divides to produce an adult organism.

In plants, the most important disadvantage of sexual reproduction is that energy is required to complete a complex life cycle (i.e., zygote development).

The diploid (2n) multicellular stage in the life cycle of a plant is known as the sporophyte.

In conclusion, a disadvantage of sexual reproduction in plants is that ADDITIONAL ENERGY is needed to complete a complex life cycle.

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resource5 may 2021 open access a single-cell rna expression atlas of normal, preneoplastic and tumorigenic states in the human breast

Answers

The above sentence is part of the study on global changes in breast heterogeneity across different states along with that they studied the single-cell transcriptomes of more than 340,000 cells including normal breast, preneoplastic BRCA1+/– tissue which is the major breast cancer subtype, and pairs of tumors and involved lymph nodes.

In the study , There were notable changes in the stroma of post-menopausal women which were disclosed by Elucidation of the normal breast microenvironment. There was comparable diversity in a discrete subset of cycling cells and among cancer cells, which was revealed by Single-cell profiling of 34 treatment-naive primary tumors, consisting of triple-negative breast cancers, estrogen receptor, HER2+ .in the immune microenvironment, there were global changes which were highlighted by The transcriptomes of preneoplastic tissue versus tumors. Proliferative CD8+ T cells characterizedHER2+ cancers and triple-negative but were not able to ER+ tumors within the tumor immune landscape, while the subtypes were comprised of cycling tumor-associated macrophages. The analysis of the studies which included the copied number of paired lymph nodes and ER+ tumors showed that seeding by genetically mass migration of primary tumor cells or distinct clones into axillary lymph nodes. Such integrated samples supplied the high-resolution map of cell diversity in the cancerous and normal human breast.

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What types of organisms would you expect to see in an area that recently experienced a volcanic eruption?
a.
trees
b.
mosses and algae
c.
grass and bushes
d.
all types of organisms in fewer numbers

Answers

the answer is b: mosses and algae

Answer:

B. Mosses and algae EDGE

Explanation:

crick provided th einsight about the direction of travel in eavh dna chain. explain what he said about this

Answers

In 1953, James Watson and Francis Crick proposed the double helix model of DNA structure, which is now widely accepted as the fundamental basis of DNA organization. One of the key insights provided by Crick was the direction of travel of each DNA chain within the double helix.

Specifically, Crick proposed that each DNA chain has a directional orientation that is determined by the chemical structure of the nucleotides. In DNA, each nucleotide consists of a sugar molecule, a phosphate group, and a nitrogenous base (adenine, guanine, cytosine, or thymine). The sugar molecule and the phosphate group form the backbone of the DNA molecule, while the nitrogenous bases form the "rungs" of the ladder.

Crick realized that the orientation of the sugar molecules in each nucleotide within a DNA chain is such that they are always aligned in the same direction. Specifically, the sugar molecule in each nucleotide is connected to the phosphate group in the next nucleotide through a covalent bond, and this bond always occurs between the 3' carbon of one sugar molecule and the 5' carbon of the next sugar molecule. This creates a "sugar-phosphate backbone" that runs along the length of each DNA chain.

Based on this understanding, Crick proposed that the two DNA chains in the double helix are oriented in opposite directions. Specifically, one DNA chain runs in the 5' to 3' direction (where the 5' end has a free phosphate group and the 3' end has a free hydroxyl group), while the other chain runs in the 3' to 5' direction (where the 3' end has a free hydroxyl group and the 5' end has a free phosphate group). This orientation is often referred to as "antiparallel," since the two chains run in opposite directions.

The directional orientation of the DNA chains is important for understanding how DNA replication, transcription, and translation occur. For example, during DNA replication, the enzyme DNA polymerase can only add nucleotides to the 3' end of a growing DNA chain, so replication proceeds in the 5' to 3' direction on both strands. Similarly, during transcription, RNA polymerase adds nucleotides to the 3' end of the growing RNA chain, which is complementary to one of the DNA strands, while during translation, the ribosome reads the sequence of mRNA in the 5' to 3' direction to synthesize a protein.

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The most common cause of outbreaks in gastroenteritis is:
A: Rotavirus
B: Adenoviruses
C: Caliciviridae
D: Hepatitis A virus

Answers

Outbreaks of gastroenteritis are most often caused by certain viruses, including Rotavirus, Adenoviruses, Caliciviridae, and the Hepatitis A virus.

Here, all the options are correct.

Rotavirus is the most common cause of gastroenteritis outbreaks, especially in pediatric populations. It is characterized by diarrhea, vomiting, and abdominal pain, and is very contagious. Adenoviruses can cause a wide range of illnesses, including gastroenteritis. It is spread primarily through respiratory secretions, and symptoms include watery diarrhea, fever, vomiting, and abdominal pain.

Caliciviridae is a group of viruses that can cause gastroenteritis outbreaks, and is usually spread through food and water contaminated with feces. Symptoms include nausea, vomiting, diarrhea, and stomach pain. The Hepatitis A virus is highly contagious and is spread through contact with an infected person or contaminated food or water.

Symptoms include sudden vomiting, fever, diarrhea, yellowing of the skin and eyes, loss of appetite, nausea, and fatigue. All of these viruses can cause gastroenteritis outbreaks, and individuals are advised to practice good hygiene to help limit their risk of infection.

Here, all the options are correct.

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Classify Identify some beverages that are mixtures. Classify them as solutions, suspensions, or neither. Explain your classifications.

Answers

The beverages chosen include:

LemonadeTea

What is a Suspension?

This refers to a heterogeneous mixture which contains solid particles which are big enough to dissolve. An example is lemonade due to the presence of lemon pulp particles which cannot be dissolved mostly because of its membrane.

On the other hand, a solution is a homogeneous mixture in which the solute dissolves completely in the solvent(water). An example is Tea which comprises of the tea and water .

This therefore makes the answers given as the most appropriate choices in this example.

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chromosomes align at the equator of the cell...

1). Cytokinesis
2). Metaphase
3). telophase

Answers

I think it’s 2.Metaphase

2. Sam and Jerry are having a discussion in their Environmental Science class. Sam
says that abiotic factors determine what biotic factors can be in an ecosystem. Jerry
says that biotic factors determine what abiotic factors can be in an ecosystem. Who
is correct? Use an example to support your answer. (2 points)

Answers

says that abiotic factors determine what biotic factors can be in an ecosystem. Jerry

To study water transport in their biology class , a group of students designed a lab in which they soaked decalcified eggs in different solutions and observed how water moved across the membrane of the cell . Which type of passive transport did the students observe ? *

A. Diffusion
B. Osmosis
C. Facilitated Diffusion
D. Active Transport

Answers

I think A not sure ????

Develop and explain models of the rock cycle PLEASE HELP

Answers

This model explains how igneous rocks are created by magma rising to the surface, where it solidifies. Sedimentary rocks are created by erosive agents and compaction forces. And metamorphic rocks are created by changes in temperature and pressure.

What is the rock cycle?

The rock cycle is the geological process through which rocks transform and change from one type to another.

The cycle begins when magma rises by convection currents to the Earth's surface where it gets cold, solidifies, and turns into igneous rocks.

Igneous rocks can,

Suffer erosion and turn into sediments, which will accumulate, compact and create sedimentary rocks.

Suffer changes of temperature and pressure, originating metamorphic rocks.

Be exposed to extreme temperatures under the crust, melt and become magma again.

Sedimentary rocks are composed of rocky sediments from other rocks and the remains of living beings that get stuck within the sedimentary layers.

Sedimentary rocks can,

Suffer erosion and create new sediments to build new sedimentary rocks.

Be exposed to heat and pressure, originating metamorphic rocks.

Melt and become magma.

Finally, metamorphic rocks are produced underground when other rocks suffer changes.

Metamorphic rocks have two destinies,

Turning into sedimentary rocks.

Becoming magma.

This model explains how these three types of rocks are created and how each of them constantly turns into the other type.

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Develop and explain models of the rock cycle PLEASE HELP

is a dynamic community of plants, animals, microorganisms, and the nonliving environments in which they live.

Answers

The statement describes an ecosystem, which is a dynamic community of living organisms (plants, animals, microorganisms) interacting with each other and with the nonliving components (such as water, air, and soil) of their environment.

Ecosystems can vary in size, from small ponds or gardens to large forests or oceans, and they play important roles in regulating various biogeochemical cycles, such as the carbon and nitrogen cycles, and supporting biodiversity.

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