Instead of a reagent we can use emulsion test to identify a lipid molecule.
Using wet chemistry, the emulsion test is a technique for identifying the presence of lipids. The process involves suspending the sample in ethanol so that any lipids it contains can disintegrate (lipids are soluble in alcohols). The liquid, which contains dissolved fat and alcohol, is then decanted into water.
Procedure to do an emulsion test for lipids:
Add the ethanol, then shake. Shake the sample vigorously for a minute after adding ethanol.Fill the water with the solution. In a test tube filled with water, pour the entire solution next.Look for the development of a milky white emulsion. Lipids won't mix with water since they are immiscible in water due to their insolubility.Any lipids in your sample will consequently float to the surface and create a milky white emulsion. The milky tint will become more noticeable the more lipids there are in your sample.To know more about lipids visit:
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Which of these organelles is NOT found in Animal Cells? Golgi Apparatus Chloroplasts Cell membrane Cell Wall (large) Central Vacuole Mitochondria
Answer:Chloroplasts,is NOT found in animal cells
Explanation:
n the chemical equation for photosynthesis, carbon dioxide and water are converted to glucose and oxygen.
6CO2 + 6H2O ® C6H12O6 + 6O2
Which component could be added to complete this chemical equation?
light energy
ATP and NADPH
chemical energy
rubisco
Answer: Light energy is the element that may be included to complete this chemical equation. The correct answer is A.
Explanation:
Photosynthesis: The process of producing food by plants and other organisms that possess chlorophyll is known as photosynthesis. As a byproduct of the process, oxygen is released along with glucose.
Water and carbon dioxide are required for photosynthesis, which can only occur in the presence of sunlight. Upon completion, glucose is produced as an energy source and oxygen is released as a byproduct.
Only creatures that contain chlorophyll can carry out the process because chlorophyll helps to catch sunlight to complete it. Chlorophyll is found in plant leaves.
Thus, the correct answer is option A, Light energy.
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Which type of bonds share electrons?
A. Covalent bonds
B. Ionic bonds
C. Carbon bonds
D. Hydrogen bonds
Answer: A. Covalent bonds.
Explanation: Trust me.
why is it important to study the intentions of matter and energy on earth as an interconnected system 
What is the term fo the material though which wave moves
The material through which a wave moves is called a medium.
What are waves?
wave: the regular, systematic spread of disturbances from one location to another. The waves that travel on water's surface are the most well-known, but waves also exist in sound, light, and the movement of subatomic particles. The disturbance oscillates periodically (see periodic motion) with a set frequency and wavelength in the simplest waves. While electromagnetic waves (see electromagnetic radiation) do not require a medium to travel through and can move through a vacuum, mechanical waves, like sound, need one. The characteristics of the medium affect how a wave travels across it. also see seismic wave.
Many waves require something to travel through. Water waves travel along the surface of the water, and sound waves travel through air. You can even make a wave travel along a rope. The material through which a wave travels is called a medium. Gases (such as air), liquids (such as water), and solids (such as ropes) all act as mediums. Waves that require a medium through which to travel are called mechanical waves.
Hence The material through which a wave moves is called a medium.
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What is the function of the cell wall?
A. to contain the genetic information of an organism
B. to package proteins in an animal cell
C. to transport materials throughout a cell
D. to provide structural support for a plant cell
Answer:
D
Explanation:
the answer is d the cell wall provides support and protection
the deltoid muscle fibers are separated into . the deltoid muscle fibers are separated into . superficial and deep anterior, middle, and posterior lateral, medial, and proximal superior, middle, and inferio
Answer:
anterior, middle, and posterior
Explanation:
hope it helps though have nice day
Which structures does a single cell organism need for movement? question 3 options: cilia and flagella mitochondria and cytoplasm ribosomes and nucleus cilia and cytoskeleton
The structures that a single-cell organism need for movement include cilia and flagella (Option A).
What are cilia and flagella?Cilia and flagella are subcellular structures that cells use to move in the surrounding media. These structures are composed of monomers that connect each other and they can suffer polymerization-depolymerization cycles in order to maintain a movement in response to environmental stimuli. For example, cilia are composed of microtubules that link to the plasma membrane.
Therefore, we can conclude that cilia and flagella are structures of the cytoskeleton that help microorganisms to move in their surrounding environment.
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What differences do you notice between what happens in the Rest activity level and what happens in the Jog activity level?
please help i give the 20 pt or more or 50
The Rests activity level and what happens in the Jog activity level It is lower while you are asleep and at rest and higher while you exercise.
When you exercise your muscles need extra oxygen. That's about three times more than when the muscle is resting. This need means that your heart beats faster and your pulse quickens. Frequent exercise strengthens the heart and helps circulate blood throughout the body. A stronger heart means more blood is pumped through the body each time the heart beats.
This makes the heart beat less and distributes the same amount of blood. Heart rate can increase dramatically from a resting heart rate of 60-80 beats per minute to a maximum heart rate of about 200 in young adults. Running redirects blood flow to the tissues that need it most. For example muscles in the leg, and arteries relax, and blood flow increases. Endurance exercise increases parasympathetic activity and decreases sympathetic activity in the resting human heart.
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during cell division, dna molecules are replicated in a semiconservative manner. what happens to the original dna molecule during semiconservative replication?
A person begins at 0 and walks 5 meters to the right, turns around and walks 8
meters to the left. What is the distance? What is the displacement?
The distance is calculated out to be 13 meters and the displacement is calculated out to be 3 meters.
What is distance and displacement and how it calculated out to be so?Distance is the measure of how many meters or kilometers you covered in the time period under consideration.Distance is the measure , or a quantity to measure the distance or the product of the speed and time.Displacement is the shortest distance from the initial point to final point.Here is given that the man walks 5 meters to the right and turn around and walks 8 meters to the left.The distance is 13 meters and displacement is 3 meters.To know more about distance visit:
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How many cells are there are each of the beginning of the cell cycle?
There is just one cell at the start of cell division or the cell cycle.
A mother cell divides twice, once through mitosis to produce two daughter cells and once through meiosis to produce four daughter cells.
What are cell division and cell cycle?The cycle of a cell's growth and division entails a variety of processes. A cell spends the majority of its time, known as interphase, developing, duplicating its chromosomes, and preparing to divide. The cell continues its division process through mitosis after exiting interphase. Each of the freshly produced cells, known as daughter cells, enters its own interphase and initiates a new cycle of the cell.
The two different cell division processes are meiosis and mitosis.
During the mitotic cell cycle phase, which is also known as division, replicated chromosomes are split into two new nuclei. Cell division known as mitosis creates genetically identical cells with a conserved chromosome number.
In sexually reproducing mammals, meiosis is a special type of germ cell division that produces gametes, such as sperm or egg cells. After two rounds of division, four cells with a single copy of each chromosome are created.
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A basketball is dropped and each time it bounces, the maximum height it reaches becomes smaller and smaller. Is this an example of a system in which nonconservative forces are acting?.
Yes, It is an example of a system in which non-conservative forces are acting.
What are non-conservative forces?
When work done by the force depends on the path followed by the body, the force is said to be non-conservative. examples include Frictional force, Air resistance, Viscous force.
When the basketball hits the ground with kinetic energy, it loses some of the energy to the ground and then with the action reaction pair with the ground, is bounced back but with lower energy to a lower height.
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why does the membrane of an egg cell change it’s structure immediately after fertilisation
After fertilization by a single sperm, the cell membrane changes, blocking the entry of additional sperm.
How does the egg change upon fertilization?The fertilized egg is a single cell for the first 12 hours following conception. It splits into two cells after about 30 hours. The two cells divide into four after about 15 hours. And after three days, the fertilized egg cell has developed into a 16-cell berry-like structure.
What is the purpose of the membranes in an egg?Directly below the shell are two membranes, the outer and inner shell membranes. These membranes prevent fluids from the egg from evaporating too quickly and protect its contents from bacterial invasion.
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Two Questions pls help :)
Crossing over is responsible for some of the variation seen in offspring produced by sexual
reproduction. Explain what this means.
Compare the number of different allele combinations on the chromosomes in the gamete cells when crossing over occurs and when it does not?
Crossing-over occurs during prophase I, and it is the exchange of genetic material between non-sister chromatids of homologous chromosomes.
Chromosomes ?The thread-like components known as chromosomes are found in the nucleus of both animal and plant cells. Long segments of DNA are carried by chromosomes, which are organelles that can be found in the nucleus of cells. The substance that houses genes is called DNA. It serves as the foundation for the human body. Additionally, proteins found in chromosomes aid in the appropriate structure of DNA. Humans typically have 46 chromosomes, or 23 pairs of them in each cell. The appearance of twenty-two of these pairs, known as autosomes, is the same in both sexes. Males and females have different 23rd pair sex chromosomes.
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how much protein (amount in mg) do you have for each unknown based on the original volumes? in other words, you started with 10 ml of extract. how much protein did this 10 ml contain? what about your samples?
This is an experiment that will be done in the laboratory. The exact protein based on the originals volumes can easily be obtained by Concentration (mg/ml) = Absorbance at 280 nm divided by path length (cm.) Pure protein of known absorbance coefficient.
What is protein MG?A protein in urine test quantifies the amount of protein in your urine (pee). Your urine typically contains relatively little protein. If your urine contains a lot of protein (proteinuria), you may have a kidney issue. In order to produce urine, your kidneys filter excess water and waste from your blood.Large molecules called proteins are necessary for your body to function properly. Every aspect of your body, including your blood, contains protein. The huge protein molecules are prevented from leaving your body through urine by microscopic filters that your kidneys use to remove waste from your blood.Protein can leak into your urine if your kidneys aren't working properly. high quantities of protein over time in your urine
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invariant residues are those that are essential for the structure and/or function of the protein and cannot be replacwd by other residues. which amino residue in the globin chain is most likely to be invariant
The amino residue in the globin chain is most likely to be invariant is His F8
The invariant amino acid residues is most likely to be Histidine F8. The nitrogenous component of the i oda ole ring of histidine F8 would serve as one of the ligands to which the iron in the heme group would attach. This residues often play a pivotal role in the structure and function of both myoglobin and hemoglobin. Futthermore, it is essential for the correct binding of oxygen. Thus, substitution or replacement of this amino acid has a tendency to interfere with the binding ability of the protein and could also impact how effectively oxygen is being released. It is however, worthy of note that in these two species (myoglobin and hemoglobin) when compared several residues in both the E helix and F helix are considered invariant (they contain distal His E7).
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What does iron measure in water
Answer: The standard limit for iron in drinking water is 0.3 mg/L
(If you wat density)
Explanation:
What systems or system is responsible for the tingling in our foot?
Answer: Peripheral neuropathy, a result of damage to the nerves located outside of the brain and spinal cord (peripheral nerves), often causes weakness, numbness and pain, usually in the hands and feet. It can also affect other areas and body functions including digestion, urination and circulation.
Your peripheral nervous system sends information from your brain and spinal cord (central nervous system) to the rest of your body. The peripheral nerves also send sensory information to the central nervous system.
Peripheral neuropathy can result from traumatic injuries, infections, metabolic problems, inherited causes and exposure to toxins. One of the most common causes is diabetes.
People with peripheral neuropathy generally describe the pain as stabbing, burning or tingling. In many cases, symptoms improve, especially if caused by a treatable condition. Medications can reduce the pain of peripheral neuropathy.
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Pls help In 4 sentences describe a couple of areas in the brain that are responsible for creativity.
Answer: frontal cortex
Explanation: frontal cortex has been thought of as the hub or center of creativity as it seems to be responsible for many of the functions that contribute to creative thinking.
Classify a pet dog select all that apply
Answer: Hey, can you please give us options? It'd be helpful for us to assure the answer we give will be correct.
Explanation:
you find a fossil organism that you think is an animal. which characteristic needs to be present to determine whether it is a sponge versus a cnidarian? please choose the correct answer from the following choices, and then select the submit answer button. answer choices complex organ systems multicellularity bilateral symmetry multiple tissues
The characteristic that will determine whether the fossil organism which is an animal is a sponge or a cnidarian is: (4) multiple tissues.
Fossils are the dead and decaying remains of the plants or animals that were buried deep down on the earth millions oy years ago. The fossil can be in the form of some bone, exoskeleton, hair, petrified wood, traces of DNA, etc.
Cnidarians are the animals that belong to the phylum Cnidaria. The examples of cnidarians include corals, hydras, jellyfish, etc. These organisms have tissue level of body organization and therefore it becomes a distinguishing characteristic that differentiated them from the sponges.
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An object whose volume is calculated by multiplying length, width and height.
what is the name of the enzyme complex that is responsible for synthesis of rna? (note remembering names of important enzymes is required for this course)
Answer:
RNA Polymerase is the enzyme responsible for the synthesis of RNA
Explanation:
Ribonucleic acid [RNA] is synthesized from DNA in a process known as transcription. this process is facilitated by RNA polymerase enzyme. The corresponding RNA produced is complementary to the parent DNA
While DNA is usually double-stranded, RNA is single-stranded and they are synthesized from each strand of DNA.
RNA polymerase is responsible for unwinding the double strands of DNA and copying the information into the newly formed RNA strand.
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The enzyme responsible for the synthesis of RNA is RNA polymerase
RNA polymerase is responsible for unbinding the double strands of DNA into two single strands of the RNA and transcribing the information in DNA into the newly formed RNA
This process is known as Transcription
there are four types of RNA polymerase
RNA polymerase I; Synthesize most ribosomal RNA [rRNA]RNN polymerase II; Synthesize messenger RNA [mRNA] RNA polymerase III; Transcribe ribosomal RNA into transfer RNA [tRNA] andRNA polymerase IV and V; which are mostly found in plantsTo learn more about RNA polymerase, click here
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What is the difference between old agriculture and new agriculture?
Answer: Traditional agriculture relies on outdated information, outdated tools, and organic fertilisers, whereas contemporary agriculture relies on technologically improved tools and machinery
What did Darwin see in South America that surprised him?
Answer:
In South America, Darwin saw fossils of sea animals high in the mountains.
Explanation:
consider the bacterium thiomargarita namibiensis. imagine you are comparing two individuals that are the same size. individual 1 has a vacuole that is twice as large as the other, individual 2. which of the two would you expect to have a higher surface area-to-volume ratio for its membrane relative to its cytoplasm?
When the vacuole size for individual 1 is twice as large as individual 2, individual 1 will have higher surface area-to-volume ratio for its membrane relative to its cytoplasm.
Vacuole is the membrane bound cell organelle more prominent in plant cells. The vacuole is known to increase the surface area-to-volume ratio of the cell. Therefore larger the vacuole, larger is the surface area-to-volume ratio of that cell.
Membrane is the outer layer of the cell and cell organelles. It is made up of the lipid bilayer. It is very essential to separate the components of the cell from each other. Membrane is selectively permeable.
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in the second half of the glycolytic pathway, atp molecules are produced and with the offset of atps consumed in the first half, the net yield is atps per glucose.in the second half of the glycolytic pathway, atp molecules are produced and with the offset of atps consumed in the first half, the net yield is atps per glucose.
During the first half of glycolysis, two molecules of ATPs are consumed. In the second half however, 4 molecules of ATPs are produced per glucose. If we remove the two ATPs that has been consumed, the net yield is two ATPs per glucose
Glycolytic pathway is an anaerobic process that converts glucose into pyruvate molecules and Adenosine Triphosphate [ATP]
The pathway consist of 10 steps.
During the first phase [first five steps], 2 molecules of ATP are consumed to two molecules of Glyceraldehyde-3-phosphate [GA3P] which enter the second phase of the pathway.
At the end of the second phase, 4 molecules of ATPs and 2 molecules of pyruvate are produced
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in addition to epinephrine, your body also releases a steroid that responds to stress. epinephrine wears off quickly, but the steroid, corticosterone, can last hours. where we would predict that corticosterone (the signaling molecule) would bind to its receptor?
The glucocorticoid receptor (GR, or GCR) also known as NR3C1 (nuclear receptor subfamily 3, group C, member 1) is the receptor to which cortisol and other glucocorticoids bind.
By interacting with mineralocorticoid and glucocorticoid receptors in the brain, corticosteroid hormones help the body adapt to stress (MR and GR). These receptors serve as important transcription factors in considerable part.
The glucocorticoid receptor controls how the body will react to stress, even though cortisol is a blatant indicator that stress is there. A mechanism that affects the production of specific stress-response proteins is activated when cortisol binds to the glucocorticoid receptor.
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identify which organism possesses traits that enable it to exploit the rocky shoreline more efficiently than the other populations in the community. explain.
The organism which possesses traits that enable it to exploit the rocky shoreline more efficiently than the other populations in the community is orange mussels.
In an ecosystem, an orange mussels is referred to as a keystone species.
An experiment was conducted on different species of organisms by placing them along a rocky shoreline to find our their particular traits and characteristics.
A rocky shoreline is a restricted space with limited and fixed resources.
Only those organisms can survive in a rocky shoreline who are adaptive, less vulnerable to harsh conditions and have high rate of reproduction.
In such experiment, the organism which possessed the abovementioned characters were orange mussels as they possess stable population and high exploitation rate of reproduction.
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