Using what you know about the of the structures of side chains and the mechanisms presented in chapter, choose an amino acid side chain to play the following roles in an enzymatic mechanism: (a) participate in proton transfer, (b) act as a nucleophile.
Answers
Amino acid side chain that participates in proton transfer and acts as a nucleophile. Amino acid side chains are the part of an amino acid that extends from the alpha carbon and contributes to the protein's function.
The side chain of an amino acid can vary from just a single hydrogen atom to a complex ring structure. They are involved in catalytic activity, binding interactions, and structural stability of proteins.
(a) Participate in proton transfer: Histidine is the amino acid side chain that participates in proton transfer in an enzymatic mechanism. It is a basic amino acid that has a pKa of 6.0, which is near physiological pH. It has an imidazole side chain that can act as both an acid and a base. Histidine side chains can be protonated or unprotonated, which makes them ideal for facilitating proton transfer in enzymatic reactions.
(b) Act as a nucleophile: Serine is the amino acid side chain that acts as a nucleophile in an enzymatic mechanism. It has a hydroxyl group (-OH) on its side chain, which is highly reactive and can act as a nucleophile. This makes serine ideal for catalyzing reactions that involve nucleophilic substitution or hydrolysis. The hydroxyl group of the serine side chain can form covalent bonds with other molecules, which can then be further modified to produce the desired product.
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Related Questions
which of the following is likely to cause the precipitation of lime out of a water solution? a) photosynthesis in heat-loving algae b) rain falling out of clouds c) reduction of temperature and pressure d) water squeezed into rock joints e) sublimation of liquid water
Answers
C) Reduction of temperature and pressure is likely to cause the precipitation of lime out of a water solution.
To precipitate limestone add the lime to water to form calcium hydroxide to from hydrated lime or slake. Remove additional impurities from the slaked lime. Combine the solution with carbon dioxide and slaked lime.
In general ,When limestone is heated, calcium oxide and carbon dioxide gas are formed. When carbon dioxide gas is passed through freshly prepared lime water, the solution turns milky due to the formation of calcium carbonate, that is not soluble in water.
Hence, C is the correct option
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Which two factors have the biggest impact on the type of agriculture produced in a local area?
O Education levels and average salary
O Cost of living and population size
O Weather and local wildlife
O Climate and soil type
Answers
Climate and soil type are the two factors that have the biggest impact on the type of agriculture produced in a local area. The correct option is D.
What is climate?Climate refers to the long-term patterns of temperature, humidity, wind, and precipitation in an area, which can influence what crops can be grown and how they are grown. For example, certain crops may require specific temperature ranges, amount of sunlight, or amount of water to thrive.
Soil type refers to the physical and chemical properties of the soil in an area, which can also influence what crops can be grown. For example, some crops may require well-draining soil, while others may require soil with a high nutrient content. Soil type can also affect the types of fertilizers and pesticides that may be needed to support crop growth.
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osmosis may be defined as the movement of a solvent through a semipermeable membrane from a region of lower concentration to one of higher concentration. True or False?
Answers
Answer:
False
Explanation:
Because osmosis is the movement of water molecules from a solution with a high concentration of water molecules to a solution with a lower concentration of water molecules, through a partially permeable membrane.
False "osmosis may be defined as the movement of a solvent through a semipermeable membrane from a region of lower concentration to one of higher concentration" is false.
In osmosis, the movement of the solvent is driven by the difference in solute concentration across the semipermeable membrane. The semipermeable membrane acts as a selective barrier, allowing only the solvent to pass through and not the solute. As a result, the solvent moves from an area of high concentration to an area of low concentration, in an attempt to equalize the solute concentration on both sides of the membrane. This process is an example of passive transport, as it does not require any input of energy from the system. Instead, it is driven by the thermodynamic tendency towards a state of lower free energy, which is achieved by equalizing the solute concentration. In biological systems, osmosis plays an important role in the regulation of fluid balance and water homeostasis. For example, in plant cells, the regulation of water balance through osmosis is crucial for maintaining turgor pressure and cell shape.
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Using corn for energy is an example of
Answers
Answer:
biomass
Explanation:
Corn is a renewable resource. That means we can grow more if we need more.
Please MATCH the Key Word to the correct definition
Answers
Answer:
1a 2c 3b 4d
Explanation:
60 minutes remaining
Question 13 The most abundant photoreceptors that detect dim light are Cones.
A True
B False
Question 14 Muscular tissue that adjusts the shape of the pupil to regulate how much light enters the eye is IRIS.
A True
B False Question
15 Opsins are visual pigments derived from Vitamin D.
A True
B False
Answers
Answer:
Question 13:
B. False
The most abundant photoreceptors that detect dim light are Rods, not Cones. Rods are highly sensitive to low light conditions and are responsible for vision in dim light and peripheral vision. Cones, on the other hand, are responsible for color vision and high visual acuity but are less sensitive to low light conditions.
Question 14:
A. True
The iris is the muscular tissue in the eye that adjusts the size of the pupil, controlling the amount of light entering the eye. It contracts or expands to regulate the size of the pupil in response to changing light conditions.
Question 15:
B. False
Opsins are visual pigments found in photoreceptor cells, specifically in the retina of the eye. They are responsible for capturing light and initiating the process of vision. Opsins are not derived from Vitamin D. Vitamin D is a separate compound involved in various physiological processes in the body, including calcium absorption and bone health.
Explanation:
Maple seeds spread so that new maple trees can grow.
Which way will these seeds most likely spread?
Answers
Answer:
Maple seeds travel on the wind by using their wings. The uneaten seeds will germinate some distance from the parent plant.
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Maple seeds are considered to be wind-pollinated.
These are very light seeds so they can easily transport by wind.What is the feature of seeds to disperse through winds?Lightweight.Silky hair.Wings. Seeds of plants like cotton, poppy and drumstick are dispersed by wind. Wind dispersed seeds have special adaptations which make their dispersal easier. They are light in weight. Some have wings that help them fly long distances.What are the methods through which dispersal of seeds take place?There are five main modes of seed dispersal:
Gravity, Wind, Ballistic,Water, Animals.To know more about seeds dispersal here
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Some owls produce 2 pellets per day. Assume each pellet
represents 80g of biomass. Also assume that one 40g vole can cause 50 cents of crop damage to a farm per season. If a barn owl family of seven (2 adults[producing 2 pellets/day] and 5 young [producing 1 pellet/day]) lives on a farm for 12 weeks and feeds exclusively on voles, how much will the farmer save in crop damages over the course of a season?
Answers
Answer:
I'm in fifth grade
Explanation:
I'm just 10 sorry just started
on this app
What is a gene?
Correct Answer:
Explanation:
Answers
Answer:A gene is the basic physical and functional unit of heredity. Genes are made up of DNA. Some genes act as instructions to make molecules called proteins. ... Every person has two copies of each gene, one inherited from each parent.
Explanation: cuz I am smarat
Name the anatomy of the abdomen!
Answers
The area of the body between the chest and the pelvis is known as the abdomen. It is home to a variety of vital organs, including the kidneys, liver, stomach, and intestines. For the diagnosis and treatment of medical disorders that affect this region of the body, it is crucial to comprehend the anatomy of the abdomen.
Each of the four quadrants of the abdomen contains a different organ:
The liver, gallbladder, and a piece of the small intestine are located in the upper right quadrant.The stomach, spleen, and a piece of the small intestine are located in the upper left quadrant.The appendix, cecum, and a piece of the small intestine are located in the lower right quadrant.The descending colon, sigmoid colon, and a portion of the small intestine are located in the lower left quadrant.In order to more precisely detect specific organs, the abdomen can also be divided into nine regions:
Includes the liver, gallbladder, and right kidney in the right hypochondriac area.The stomach and pancreas are located in the epigastric area.Spleen, left kidney, and a portion of the stomach are located in the left hypochondriac area.The ascending colon, right kidney, and a portion of the small intestine are all located in the right lumbar area.The small intestine, transverse colon, and a portion of the stomach are located in the umbilical area.The descending colon, left kidney, and a portion of the small intestine are all located in the left lumbar region.Appendix and cecum are located in the right inguinal area.The bladder, uterus, and a portion of the small intestine are all located in the hypogastric area.Parts of the descending colon and sigmoid colon are located in the left inguinal area.The abdominal cavity includes these particular organs and areas in addition to having muscles, blood arteries, and nerves. The rectus abdominis, internal oblique, external oblique, and transversus abdominis are the muscles in the abdomen. For proper posture, respiration, and body movement, these muscles are crucial.
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The smallest particles that make up matter
A. are about the size of pinheads.
B.
are about the size of marbles.
C.
are too small to be seen with the unaided eye.
D.
can be seen with the unaided eye only at certain temperatures.
Answers
Answer: c
Explanation: atom too small to see with a naked eye
each step of the pyramid is called a
Answers
Answer:
on the food chain it's trophic levels
actual step pyramids are called ziggurats
PLEASE HELP How do active transport and facilitated diffusion differ? a one uses help from proteins and the other does not b one requires energy and the other does not c active transport moves molecules against a concentration gradient and facilitated diffusion does not d both b & c
Answers
Answer:
b and c
Explanation:
because active transport requires energy from respiration yet diffusion doesn't. Additionally, active transport molecules move against a conc gradient but diffusion molecules move down a conc gradient.
Identify two of each of following from the food web
Primary Producer
Primary Consumer
Secondary Consumer
Top Predator (only one)
Can some please help correct answers only please
Answers
Primary Consumer: Sea Urchins and Sessile Invertebrates
Secondary Consumer: Larger Crabs and Sea Stars
Top Predator: Sharks
I don't know if it is the security guard but what I put if it is wrong please tell me the correct answer.
Answers
The correct option for the function of cell membrane is like "security guard".
Define cell membrane and its functions?All cells have a cell membrane, also known as a plasma membrane, which separates the cell's internal environment from the external environment.
A semipermeable lipid bilayer makes up the cell membrane. The movement of materials into and out of the cell is controlled mostly by cell membrane.A cell is protected by its cell membrane, also known as the plasma membrane. Additionally, it maintains a constant environment inside of the cell, but that membrane serves a variety of purposes. One is to move compounds out of the cell that are harmful as well as nutrients into the cell. Another is that there will be proteins on the cell's membrane, which is its plasma membrane, that interact with some other cells.Thus, the function of cell membrane is like security guard.
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a fine network of connective tissue fibers supports the hepatocytes and sinusoid lining cells. what type of fibers are these?
Answers
The fine network of connective tissue fibers that supports the hepatocytes and sinusoid lining cells in the liver is composed of reticular fibers.
Reticular fibers are made of type III collagen and provide a supportive framework for cells in organs such as the liver, lymph nodes, and bone marrow. Reticular fibers are a type of collagen fiber that is thinner than regular collagen fibers and is highly branched.
In the liver, the reticular fibers form a delicate meshwork that surrounds the hepatocytes and sinusoidal cells, helping to maintain the structural integrity of the organ and facilitate the exchange of nutrients and waste products between the blood and liver cells.
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what is the major function of the hormone produced by the cells marked in the thyroid follicle shown in the histology picture?
Answers
The thyroid follicles are structures found in the thyroid gland, which is located in the neck.
The cells within the thyroid follicles are responsible for producing and secreting thyroid hormones, primarily thyroxine (T4) and triiodothyronine (T3).Thyroxine (T4) is the main hormone secreted by the thyroid gland. It plays a crucial role in regulating the body's metabolism, growth, and development. T4 is relatively inactive compared to triiodothyronine (T3), which is the more biologically active form of the hormone.Once secreted, T4 is converted into T3 in various tissues throughout the body. T3 acts on almost every cell in the body, influencing processes such as energy production, protein synthesis, and gene expression.Overall, the major function of the hormone produced by the cells in the thyroid follicles is to regulate metabolism and contribute to the proper functioning of various organs and systems in the body.
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Choose two options.
In an atomic power plant, where does the generator get its energy to operate?
1. directly from the reactor
2. from mechanical energy
3. from the steam turbine
4. from the electric power lines
5. from solar power
Answers
The generator get its energy from the steam turbine for the atomic power plant to operate.
What is atomic power plant and where does it get its energy from?Atomic power plant is a power plant which provides power supply and uses a lot of assets and chemical substances for operation.Atomic power plant uses the water core at the bottom level of the plant which is heated during the process.In the atomic power plant occurs a lot of nuclear fission which releases a lot of heat and then pumped into tubes insid a heat exchanger.The objective of atomic plants used to be to produce atomic energy from such large mass.And converting the atomic energy into usable power for the use.To know more about atomic power plant visit:
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Where are the Buccinator and superior pharyngeal constrictor muscles attached to each other?
Answers
The buccinator muscle and superior pharyngeal constrictor muscle are attached to each other at the posterior pharyngeal wall. Together, these muscles work to aid in the process of swallowing.
The buccinator and superior pharyngeal constrictor muscles are not directly attached to each other, as they serve different functions and are located in different areas of the head and neck.
The buccinator muscle is found in the cheek and is a part of the facial muscles. It helps in moving food during chewing and assists in the act of blowing.
The buccinator muscle is a thin, flat muscle located in the cheek, while the superior pharyngeal constrictor muscle is one of the three pharyngeal muscles located in the pharynx.
The superior pharyngeal constrictor muscle is a pharyngeal muscle located in the neck. Its primary function is to help in the swallowing process by constricting the pharynx.
Although they are not directly attached, both muscles work together to facilitate the process of chewing and swallowing food.
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Who would win in a fight?...
A silverback gorilla or 4 Navy Seals?
Answers
No man can beat this fella right here!
Imagine weighing 150 kilos and still being that ripped!!
Answer:
big monke would win hes too stronk
Explanation:
why do insect-pollinated flowers have sticky/ spiky pollen
Answers
Answer:
Insect-pollinated flowers have sticky or spiky pollen grains to that they stick to the insect bodies [ so that when an insects visits another flower, the pollen grain will easily land on the stigma allowing pollination and fertilisation to take place ].
Please help with the bottom question! :)
Answers
Answer:
An increased number of stomata per mm² can cause an increase in the loss of water [increased transpiration].
Explanation:
Since stomata are open for gas exchange to take place, this, in turn, causes water to escape. More stomata, therefore, means that more water can be lost.
Answer:
One disadvantage can be that stomata may need more time to process and can’t work deliberately.
Explanation:
hope this helped!
if tips of grasses or sugar cane are removed they keep growing in length
Answers
Answer:
Presence of intercalary metristems.
Explanation:
Makes the sugar cane grow in length even if the tips are removed.
Three processes are sharing 3 resources:
p1 requests: r1 and then r2
p2 requests: r2 and then r3
p3 requests: r3 and then r1
Assuming all processes run concurrently and request resources at the same time, deadlock will occur. Deadlock is also possible if
A. p1 requests the resources in reverse order.
B. p2 requests the resources in reverse order.
C. p1 and p2 request the resources in reverse order.
D. all three processes request the resources in reverse order.
Answers
The option D is correct, where all three processes request the resources in reverse order, can result in a deadlock.
The possible deadlock scenario can occur if option D is chosen, where all three processes request the resources in reverse order.
In the given scenario, the deadlock can occur if the processes request the resources in a circular dependency. Each process holds one resource and is waiting for the resource held by the next process in a circular manner, resulting in a deadlock.
If all three processes request the resources in reverse order, the circular dependency is still maintained, leading to a potential deadlock situation.
Therefore, option D, where all three processes request the resources in reverse order, can result in a deadlock.
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What is a tissue?
a.s.a.p!!!!!
Answers
Hey!!
Tissue is defined as a group or layer of similarly specialized cells which together performs certain special functions.Hope it helps
Good luck on your assignment
Answer:
A tissue is a material which plant and animal are made of, consisting of special cell.
Explanation:
Look at the chart comparing the price of graphic T-
shirts to the quantity supplied.
This chart is an example of a
O demand curve.
O demand schedule.
Price Per
Graphic Tee
Quantity
Supplied
O supply curve
O supply schedule.
$5.00
10
$7.50
20
$10.00
30
$12.50
40
$15.00
50
Answers
Answer:
It's D
Explanation:
The asker answered it for me XD
The chart that was used to compare the price of graphic T-shirts to the quantity supplied is a: supply schedule.
What is supply?Supply can be defined as the total quantity of goods or services that are demanded by consumers at a given price and period of time.
In Economics, there are two main types of chart that are used to illustrate the relationship between the total quantity of goods or services that are demanded by consumers and the total quantity of goods or services that were supplied by a manufacturer or producer and these include:
Demand scheduleSupply scheduleIn this scenario, the chart that was used to compare the price of graphic T-shirts to the quantity supplied is called a supply schedule.
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1. Do you think that the weather condition
in an area could be used to predict
Explain your reasoning.
landslides?
Answers
Yes, the weather condition in an area can be used to predict landslides. Heavy rains, snowmelt and rapid changes in temperature can all cause destabilization of the soil, leading to a landslide.
Weather condition of various placesWeather conditions can be used to predict landslides, which are caused by the destabilization of the soil. Heavy rain, snowmelt and rapid changes in temperature can all cause the soil to become unstable and lead to a landslide. Additionally, the topography of an area, such as steep slopes, can contribute to a landslide. Monitoring weather conditions can help predict the possibility of a landslide.
This is because when the soil is already weakened due to heavy rain or snowmelt, a rapid change in temperature can cause the soil to become even more unstable. Similarly, when an area has steep slopes, heavy rain or snowmelt can cause a landslide.
Therefore, monitoring weather conditions in an area can help to predict the possibility of a landslide. Additionally, observing changes in the slope of an area can also help in predicting landslides. If the slope of an area is changing, it can be an indication that a landslide may occur. To accurately predict a landslide, it is important to monitor both the weather conditions and the topography of an area.
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stimuli are carried to the brain from the periphery along the efferent neurologic tract.
T/F
Answers
Stimuli are carried to the brain from the periphery along the efferent neurologic tract. The statement is False.
Stimuli are carried to the brain from the periphery along the afferent neurologic tract. The efferent neurologic tract carries signals from the brain to the periphery.
The PNS is further divided into two main divisions: the somatic nervous system and the autonomic nervous system.
The somatic nervous system controls voluntary movement, while the autonomic nervous system controls involuntary movement, such as heart rate, breathing, and digestion.
The somatic nervous system is further divided into two main parts: the afferent division and the efferent division. The afferent division carries information from the periphery to the CNS, while the efferent division carries information from the CNS to the periphery.
The afferent division of the somatic nervous system is responsible for carrying sensory information from the skin, muscles, and joints to the CNS. This information is used by the CNS to create a map of the body and to control movement.
The efferent division of the somatic nervous system is responsible for carrying motor information from the CNS to the muscles. This information is used by the CNS to control voluntary movement.
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In which biome is this food web most likely to be found? (picture below)
Answers
EXPLANATION/ANSWER:
Since no trees are involved, it may be grassland. Grasslands are open areas with mostly grasses maintained by grazing animals like the impala seen in the photo.
A dichotomous key for trees is provided. Hikers found a tree that has large brown cones and single, sharp needles. What species of tree have the hikers found?
A)Pine
B)Juniper
C)Fir
D)Spruce
Answers
Answer: D: Spruce
Explanation:
Hikers found a tree that has large brown cones and single, sharp needles. The species of tree have the hikers found Spruce.
What are difference between pine tree and spurse?
Spruce seed cones generally arise at the top 1/3 of the tree, at the same time as pollen buds, which can be pretty inconspicuous, arise at the decrease 1/3 to lessen self-pollination (Photo 3). Some bushes might also additionally produce sufficient cones to turn out to be truly unpleasant and decrease this year's shoot and needle growth.
The fundamental distinction among spruce and pine is that the needles of the spruce are brief while the needles of the pine are long. Furthermore, the twig of a spruce bears a single cone, needle at the same time as a spray of a pine bears two, 3 or 5 needles.
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