Polypeptides are chains of amino acids. They can coil/fold into different shapes. Some 'R'-groups are either hydrophobic, hydrophilic, or neutral in their charge. Suppose you have a very long polypeptide, where a part of the chain is hydrophobic and another part is hydrophilic. I go ahead and drop this long polypeptide in water and it coils up. How do you think it would coil? Why? What can you infer about the proteins in our bodies regarding this situation
Answer:
The hydrophilic part of the polypeptide chain would be oriented towards the surrounding water while the hydrophobic portion would be arranged away from the water and would make the hydrophobic interior resulting in coiling of the polypeptide chain. The body proteins assume the shapes to organize their hydrophobic parts away from the watery fluid.
Explanation:
Amino acids are the monomers of proteins. Each amino acid, present in proteins, has a central carbon atom. Four functional groups are attached to the central carbon atom of amino acid. These are the carboxyl group (COOH), amino group, a hydrogen atom (H) and a side chain (called R group). Amino acids differ from each other for the side chain present in them. Based on the nature of the side chain, amino acids are hydrophobic or hydrophilic or neutral. Sidechains of some amino acids are charged and have positive or negative charges on them.
The extracellular fluid of the body is a watery medium. Blood also has liquid plasma that is 99% water. The intracellular fluid, called cytosol, is also a water-based liquid.
The hydrophilic side chains of the amino acids interact with the watery surroundings. They can make hydrogen bonds with the water. The charged hydrophilic R groups make electrostatic interactions with the surrounding medium. The hydrophobic R groups of the amino acids tend to arrange themselves away from the watery medium. This makes the part of the polypeptide chains with hydrophobic amino acids to fold so that these R groups are oriented away from the water.
Similarly, when a long polypeptide chain is dropped in the water, the hydrophobic R groups are arranged away from the water while the hydrophilic ones are arranged towards the surface of the chain facing the water. It is done to adopt a stable shape where maximum attraction forces are established.
In what ways are the ingredients in a cake like the gases in Earth’s atmosphere?
Answer:
because there are different types of gases and layers of the atmosphere on earth.
Explanation:
Which organisms undergo Carnegie stages?
Answer:
B: Sheep
Explanation:
only mammals undergo Carneige Stages
Answer:
Salamander and Sheep!
Explanation:
List two factors that may cause cancer, and explain those factors as to how they affect cancer.
Answer:
Biological or internal factors such as age,gender, inherited genetic defects,skin types,etc
environmental exposure eg exposure to Radon and UV radiation and fine particulate matter
Which cell structures are seen in all cell types? Check all that apply.
Organisms that contain only one cell and do not contain a nucleus or membrane-bound organelles are known as
.
Answer:
unicelluar
Explanation:
I just reasearched
what is the definition of rough ER
Answer:
Edoplasmic reticulum
Explanation:
it's a network of membranes that folds, modifies, and transports proteins throughout the cell.
plz help meeee!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
i think it is the middle one
B
Normal homeostatic conditions require potassium concentrations to be about 1000 times higher inside the cell than in the blood.
What mechanism does a cell use to move these small potassium molecules into the cell against the concentration gradient?
A.
active transport by proteins
B.
active transport by endocytosis
C.
passive transport by osmosis
D.
passive transport by diffusion
Which statement forms part of cell theory?
Answer:
All living things are made up of cells.
The cell theory is a widely accepted principle of biology. Scientists that contributed to the cell theory include; Theodor Schwann, Matthias Schleiden, and Rudolph Virchow.
The cell theory states that;
All living organisms are made up of cells and they may be unicellular or multicellular.
The cell is the basic structural and functional unit of life.
Cells arise from pre-existing cells.
Choose all the answers that apply.
Muscles in the small intestine are _____.
smooth
striated
involuntary
voluntary
cardiac
Answer:
involutary
Explanation:
we don't have to will it to work
Describe the similarities between enzymes and receptors.
Answer:
Receptors and enzymes are both located in the cell membrane. Receptors and enzymes are both proteins that can cause a reaction or response. Receptors and enzymes both speed up chemical reactions. Receptors and enzymes do not have any similarities.
Explanation:
Enzymes are known as biological catalysts. They speed up a chemical reaction taking place inside the body. Receptors can be defined as the chemical structures that transduce and receive signals.
The similarities between enzymes and receptors are as follows:
Both are composed of proteins.Both contain specified sites for their substrates.Receptor causes a response and enzymes facilitates a reaction.Both are proteins and both are crucial for the completion of different functions in the body.
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Which would best allow a species to survive environmental changes? (8.L.4.2)
similar physical
features
low mutation rate
genetic diversity
small population
Small population is the answer
Your welcome
According to the Charles darwin theory of natural selection, genetic diversity best allow a species to survive environmental changes.
What is the theory of natural selection?Natural selection is the procedure via which populations of living organisms acclimate and modify.
Individuals in a population are naturally variable, indicating that they are all distinct in some manner. This divergence means that some individuals have characteristics better suited to the environment than others.
Natural selection leads to evolution.
Thus, genetic diversity best allow a species to survive environmental changes.
To learn more about Natural selection click here:
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Need Help Earth Science: Due in 3 minutes
Which of the following is not an example of a fossil:
Question 1 options:
A) petrified wood
B) coprolite
C) amber
D) mud
Answer:
Answer is Mud,
two or more functions that must occur
inside of our body so that we stay alive.
Answer:
hope this helps u
Explanation:
These many functions can be summarized in terms of a few that we might consider definitive of human life: organization, metabolism, responsiveness, movement, development, and reproduction.
similarities between seemingly unrelated organisms can be explained by Darwin's theory that organisms come from common ancestors true or false
Answer:
false
Explanation:
Answer:
Actually, this is true
Explanation
I just took the test on edu
If you poured the fluids below into a container, which would sink to the bottom?
-water with a density of 1.0 g/cm3
-vegetable oil with a density of 0.91 g/cm3
-honey with a density of 1.36 g/cm3
-air with a density of 0.00013 g/cm3
Answer:
Honey > Water > oil > air
Explanation:
Heavy density will sink and less heavy density will float
So,
Density of honey is highest so, honey will sink
than,
Density of water is higher so, vegetable oil will float
Density of oil is higher so, air will float
Honey > Water > oil > air
If something irritates the nerves going to your diaphragm, it will spasm
and you will ______.
Answer:
guess
Explanation:
A white poster board looks white because the light waves are being ______ while a black poster board looks black because the light waves are being ________
A. refracted vs diffracted
B. absorbed vs reflected
C. transmitted vs reflected
D. reflected vs absorbed
Answer:
The answer is D. Reflected vs Absorbed
Explanation:
Black shirts get so hot because it's absorbing all light whereas white is colder because it's reflecting all light
Please mark Brainliest
Answer:
D. Reflected vs Absorbed
Explanation:
A classmate suggests a new hypothesis for researchers to test: Taller salt marsh grasses are
prettier than shorter marsh grasses. Explain why this hypothesis is not scientific.
Answer:
Because it's an opinion and cannot be tested.
Explanation:
Which change to the model would improve its accuracy? A. Move each neutron so it is next to a proton. B. Move the protons and neutrons to a small space in the center. C. Move the protons and electrons to a small space in the center. D. Move all of the particles so that they are evenly spaced.
Answer:
B
Explanation:
B. Move the protons and neutrons to a small space in the center.
Answer:
B. Move the protons and neutrons to a small space in the center.
Explanation:
Under certain external conditions, a person will perspire a great deal. For which internal condition does this response
primarily provide homeostasis?
water balance
electrolyte balance
temperature balance
energy balance
Answer:
Perspiration provides homeostasis to the internal condition of temperature balance.
Explanation:
Perspiration occurs as a consequence of the increase in environmental temperature, which at the same time produces an increase in body temperature.
The high body temperature produces a stimulus that reaches the thermoregulation center of the central nervous system, which produces a response transmitted through the sympathetic nervous system, causing the sweat glands to increase the production of sweat.
The sweat that covers the skin is capable of acting as a physical agent to lower the temperature, a mechanism of thermal regulation that contributes to temperature balance.
The other options are not correct because:
Water and electrolyte balance is done at the renal level. The energy balance depends on the food intake and the amount of energy used.Answer:
temperature balance
Explanation:
Please help me.
The biomolecule described is a...
A) carbohydrate
B) Protein
C) Lipid
D) monosaccharide
Answer:
C
Explanation:
Lipids include various biomolecules whose common property is their insolubility in water. Lipids include a variety of molecular types, such as neutral fats, oils, steroids, and waxes. Unlike other classes of biomolecules, lipids do not form large polymers
Which type of energy transformation is controlled by chloroplasts?
Where does the water enter the plant in photosynthesis?
Answer:
The water needed for photosynthesis is absorbed through the roots and transported through tubes to the leaf. The roots have a type of cell called a root hair cell. These project out from the root into the soil, and have a big surface area and thin walls. This lets water pass into them easily.
Explanation:
Hope this helps
This organelle modifies and labels proteins so they will be working properly and arrive at the correct destinations? so whats the answer?
Answer:
[tex]\boxed {\tt Golgi \ apparatus}[/tex]
Explanation:
After a protein is produced on a ribosome it is sent to the endoplasmic reticulum. Here, proteins fold and then are sent to the golgi apparatus.
In this organelle, proteins are modified and labeled. Sugar groups (modifications ) and tags/signals (labels) can be added. From the golgi apparatus they are sent to different destinations or secreted.
So, the correct answer is Golgi apparatus.
Golgi apparatus
The Golgi apparatus, which is usually situated near the nucleus, receives proteins and lipids from the ER, modifies them, and then dispatches them to other destinations in the cell. Transport from the ER to the Golgi apparatus—and the Golgi can either move onward through the Golgi stack or, if they contain an ER retention signal, be returned to the ER; proteins exiting from the Golgi are sorted according to whether they are destined for lysosomes (via endosomes) or for the cell surface.
Proteins...
A) provide support, structure and storage
B) help organisms maintain homeostasis
C) help carry important molecules around the body
D) all the above
Answer:
D all of above
Explanation:
What is informal science?
Answer:
Informal science education (ISE) is lifelong learning in science, technology, engineering, and math (STEM) that takes place across a multitude of designed settings and experiences outside of the formal classroom
i hope this help
Explanation:
Informal science education (ISE) is lifelong learning in science, technology, engineering, and math (STEM) that takes place across a multitude of designed settings and experiences outside of the formal classroom.
2Mg + O2 ----> 2MgO
in the equation above , how many atoms are in the oxygen molecule
A.2
B.0
C.1
D.3
Answer:
2
Explanation:
Why did the narrator use the phrase "fit together like puzzle pieces" to describe how the cells of a developing human
embryo form a human face?
Answer:
The narrator uses that phrase because the pieces of the skin and face feathers have to come together as one to create a human head so they would be fitting together like puzzle pieces.
Explanation:
Answer:
The human face doesn’t form all at once. It requires many divisions of cells. As the cells divide, they eventually piece together to form a human face.
Explanation:
Carbon atoms have four electrons in their outer shell. This means that a single carbon atom can form up to _______ bonds with other atoms.
Answer:
four
Explanation:
Carbon atoms have four electrons in their outer shell. So, it exhibits tetravalency & thus, a single carbon atom can form a maximum of four (4) bonds with other atoms