Why do stem cells have the potential to
cure many human diseases?
Question: What do you think has to happen for
the bond between the nucleotides to be broken:
a) More water molecules must be removed.
b) A water molecule must be added.
Answer:
A water molecule must be added
What is the name of the solid part of Earth, including rock, minerals, and metals?
Answer:
Lithosphere is the name of the solid part of Earth, including rock, minerals, and metals.
Answer:
Geosphere/Lithosphere
Explanation:
The answer would be lithosphere but for this question it wouldn't' be because I took the test.So another word for lithosphere would be geosphere.These answers are both correct just that sometimes the test would only show one of these.
What are three things that eukaryotic cells have? Write in two sentences
Answer:
They have membrane bound organelles as well as a membrane bound nucleus.
Here's extra: "Endoplasmic reticulum, microtubules, and the Golgi apparatus are unique to eukaryotic cells, and will not be found in prokaryotes."
What process is partially responsible for creating local climates in urban areas
Drag each label to the correct location on the image.
A diagram of an animal cell is shown below. Each arrow points to a different organelle. Correctly label each organelle.
centriole
cell
membrane
ribosome
Golgi
apparatus
nucleus
rough
endoplasmic
reticulum
mitochondrion
smooth
endoplasmic
reticulum
need help please ):
Breathing occurs when the changes in air pressure causes air to flow into or out of your lungs as you inhale or exhale.
true or false
Answer:
true
Explanation:
Lipids such as fats serve as a stored form of energy and are required for varius functions of the body
Answer:
uhm this is true is that is what your asking?
Explanation:
Lipids such as fats serve as a stored form of energy and are required for various functions of the body. The body needs to digest and absorb the fats we consume so that it can accomplish these functions.
If a disease caused the death of 50 percent of the individuals in the 25-40 year old age range, this would have minimal effect on the individuals in younger and older age ranges.
True
False
Answer:
The answer is actually false i took this lesson on oddseyware already :)
Explanation:
Consider a population of Clostridium difficile living in the human gut. Regular ingestion of an antibiotic is a selective process on the gut ecosystem. Which of the following events could be considered adaptive mutations for C. difficile in this environment? A. Acquisition of a plasmid with a gene encoding an enzyme to inactivate the antibiotic B. Deletion of the gene encoding a restriction endonuclease C. Duplication of the gene encoding flagellin D. Point mutation changing a single amino acid in a membrane transporter
Answer:Acquisition of a plasmid with a gene encoding an enzyme to inactivate the antibiotic
Explanation:
Clostridium difficile is a Gram-positive gastroimtestinal bacteria that forms spore it cause a range of diseases like antibiotic-associated diarrhea (AAD).
C. difficile genome harbors a variety of resistance genes that makes it resistance to different classes of antibiotics. Analysis conducted on C. difficile 630 genome identified genes encoding β-lactamase-like proteins and penicillin-binding proteins (PBPs) as one that mediate the resistance to the β-lactam antibiotics such as penicillin and cephalosporins this is done by an enzymes that unlocks the drug active site making the bacteria resistance to it.
Which of the following performs the phosphorus cycle A) Autotrophs C) Carnivore B)Heterotrophs D) Herbivore
Answer:
The autotrophs are the ones that perform the phosphorus cycle.
Explanation:
A is correct because the autotrophs are the organisms that are able to consume the inorganic phosphates, use them, and release parts of them in the other spheres, thus contributing to the phosphorus cycle.
B is not correct because the heterotrophs are not organisms that can process inorganic matter and produce their own food, instead, they are dependent on the autotrophs to do that.
C is not correct because the carnivores are not able to consume and process inorganic phosphates, with their food sources being based around the primary and secondary consumers.
D is not correct because the herbivores use the producers (autotrophs) as their food source, and they are not able to process inorganic phosphates on their own.
PLEASE HELP. I WILL GIVE YOU BRAINLIEST!
Which terms correctly identify the indicated structures in this sketch of a cell viewed under a microscope?
Drag and drop a term to match each label.
Answer:
A: The right answer is Vacuole
Vacuoles are organelles present in plant cells. It is a large single structure, of variable shape according to the cells, delimited by a lipid membrane called tonoplast.
The vacuoles allow the storage of water, ions, sugars, ... and by magnifying, play an important role in the growth of the plant.
B: The right answer is Mitochondria
Mitochondria are organelles present in eukaryoptic cells. The mitochondrion is composed of a double membrane, the inner membrane being folded into mitochondrial ridges.
Mitochondria are the organelles that produce the energy of the cell. The mitochondria thus have a role of power station for the cell. They are the ones who perform cellular respiration.
C: The right answer is Cell membrane (the inside layer)
All cells (prokaryotic and eukaryotic) are separated from their environment by a palsmic membrane.
The plasma membrane is the line of demarcation between the cell and its environment (= envelope of the cell).
It determines what goes into the cell and what comes out of it. Like all biological membranes, the plasma membrane has a selective permeability, that is to say it is allowed to pass through certain substances more easily than others.
The plasma membrane consists of a double lipid layer in which proteins are inserted.
D: The right answer is Chloroplast
Chloroplasts are important organelles specific to plant cells. Chloroplasts appear green ... They contain chlorophyll, a pigment that captures solar energy.
Choroplasts perform photosynthesis, that is, they absorb sunlight and use it for the manufacture (synthesis) of organic compounds from carbon dioxide and water.
E: The right answer is Lysosome
The lysosome is a small spherical structure (a vesicle) delimited by a lipid membrane located in the cytoplasm of eukaryotic cells. The membrane contains ion channels (proton pumps) that allow the active entry of H + ions, in order to maintain an acid pH (between 3.5 and 5) within the lysosomal vesicle.
Lysosomes are organelles of eukaryotic cells that contain a mixture of digestive enzymes used to degrade macromolecules.
Lysosomes are considered the "stomach" of the cell.
F: The right answer is Endoplasmic reticulum
The endoplasmic reticulum are organelles of eukaryotes that extend throughout the cytoplasm (like a labyrinth). These are organelles that produce proteins and play a vital role in the development of the other membranes of the cell.
Explanation:
Dont forget my brainliest
What do a bacteria an a elephant have in common
Answer:
similar metabolism
Explanation:
Match the transposition pathway with its correct description. Answers may be used more than once or not at all.
1. Retrotransposon pathway
2. Direct cut pathway
3. Cut and paste pathway
4. Replicative pathway
Transcription pathway
A. Involves removing a segment of DNA and placing it in a new location; the number of TE is not increased.
B. Involves the copying of DNA.
C. Involves the translation of proteins.
D. N/A E. Involves an RNA intermediate and the reverse transcriptase enzyme
Answer:
1. Retrotransposon pathway: E. Involves an RNA intermediate and the reverse transcriptase enzyme
3. Cut and paste pathway: A. Involves removing a segment of DNA and placing it in a new location; the number of TE is not increased.
5. Transcription pathway: B. Involves the copying of DNA.
4. Replicative pathway: C. Involves the translation of proteins.
2. Direct cut pathway: D. N/A
Explanation:
Class I transposable elements (also known as retrotransposons) are genetic mobile elements that copy and paste into other loci by reverse transcription and integration of the cDNA into new genomic regions
Class II transposable elements (also known as DNA transposons), can move by two different mechanisms of transposition:: 1-cut-and-paste pathway: the DNA transposon leaves one locus and integrates into another genomic site. and 2-replicative pathway: the DNA transposon remains in one locus while new copies of its sequence are mobile. The replicative pathway requires a transposase enzyme that acts as a catalyst of transposition.
A specific ligand is polar in nature. Where is the ligand-binding portion of the receptor most likely to be located?
Answer:
on the extracellular side of the cell membrane
Explanation:
Ligands can be defined as signaling molecules that interact with receptors localized on target cells. Protein ligands are generally polar and soluble in water. In consequence, they tend to bind with extracellular domain receptors localized on the cell surface, on the outside surface of the cell. Some examples of protein ligands include, among others, hormones (e.g., insulin), growth factors, neurotransmitters, etc.
How are proteins and carbohydrates similar?
Answer:
Proteins consist of units called amino acids, strung together in complex formations. Because proteins are complex molecules, the body takes longer to break them down. As a result, they are a much slower and longer-lasting source of energy than carbohydrates. There are 20 amino acids.
Answer:
they both give us energy
Explanation:
Match the part of the wave to the diagram.
Amplitude / Energy
Trough
Crest
Wavelength
A⇢Amplitude
It refers to the maximum displacement of a particle from it's resting positionB⇢Wavelength
The distance from one crest/trough to another crest/troughC⇢Crest
It's the a.pex of the waveD⇢Trough
It's the lowest surface part of a waveConsider the denaturation equilibrium between native Ribonuclease A and unfolded protein. Ribonuclease A is a 124 amino acid protein with four disulfide bridges. To test the importance of one of the disulfide bridges in protein stability, residues Cys58 and Cys110 were mutated into Ala. The protein denaturation parameters for Ribonuclease A wild-type and mutant are shown below. All values are in kJ/mol.
wt: ΔH: 297.2
TΔS: 254.6
ΔG: 42.4
mutant: ΔH: 184
TΔS: 183.2
ΔG: 0.8
Mark the following statement as True or False: Denaturation is spontaneous for both enzymes.
A. True
B. False
Answer:
False
Explanation:
We know from thermodynamics that;
When ∆G is positive the process is not spontaneous
When ∆G is negative the process is spontaneous
When ∆G is zero, the system has attained equilibrium.
In both cases, ∆G is positive hence the denaturation of both enzymes is not spontaneous, hence the answer above.
In 1918, the tsar (king) and tsarina (queen) of Russia and their five children were presumably assassinated and buried in an unmarked grave. Later, several women came forward and claimed that they were in fact Anastasia, one of the daughters whose bones had not been found. More recently, forensic scientists have extracted DNA, including mtDNA, from the skeletal remains of the tsar (father), tsarina (mother), and children. Which of the following samples of mtDNA would NOT be helpful in confirming that a woman is Anastasia?
a. the tsar and tsarina and living relatives of each of them.
b. each of the claimants or their living children.
c. the tsar, tsarina, and the other assassinated children.
d. the tsar and tsarina only.
e. the tsarina and the claimants.
The correct answer is B. Each of the claimants or their living children.
Explanation:
One of the basic principles in genetics establishes genes are passed from the parents to their offspring. Indeed, children receive 50% of genes from each parent. This implies the daughter of the tsar and tsarina will have share part of the DNA including mtDNA (mitochondrial DNA) of her mother, father, and siblings.
According to this, to prove if someone is Anastasia or not, it is possible to use the mtDNA sample from the tsar, tsarina, or death children but not from the claimants. This is because the claimants are not confirmed relatives of the tsar or the tsarina, and therefore their DNA cannot be used to determine if a woman is the daughter of the tsar and tsarina. Indeed, a woman claiming to be Anastasia can share DNA with another claimant and this does not prove they are related to the tsar and tsarina or that the woman is the real Anastasia.
Name a protein structure
Answer: Types; Examples : Transport (Hemoglobin, albumin )
Structural, (Actin, tubulin, keratin ), and Hormones, (Insulin and thyroxine).
Explanation: Protein structure is the three-dimensional arrangement of atoms in an amino acid-chain molecule. Proteins are polymers – specifically polypeptides – formed from sequences of amino acids, the monomers of the polymer. A single amino acid monomer may also be called a residue indicating a repeating unit of a polymer.
There are seven types of proteins: antibodies, contractile proteins, enzymes, hormonal proteins, structural proteins, storage proteins, and transport proteins.
It is convenient to describe protein structure in terms of 4 different aspects of covalent structure and folding patterns. The different levels of protein structure are known as primary, secondary, tertiary, and quaternary structure. The primary structure is the sequence of amino acids that make up a polypeptide chain.
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Which greenhouse gas is produced by commercial refrigeration and air conditioning systems?
A. Carbon Dioxide
B. Fluorinated Gas
C. Nitrous Oxide
D. Methane
Answer:
B. Fluorinated Gas
ok
Air conditioners and fridges involves greenhouse gases which are hydrofluorocarbons. In commercial refrigeration and air conditioning systems carbon dioxide gases is produced.
What is greenhouse gas?Greenhouse gases trap heat in atmosphere and warm the Earth.
The main gases involved are carbon dioxide, methane, nitrous oxide, water vapors etc. It also involves flourinated gases.
Carbon dioxide is primary greenhouse gas, which is emitted by human activities.
Thus, option A is correct.
For more information about greenhouse gas, visit:
https://brainly.com/question/4509458
Explain how available energy changes at each trophic level. What happens to the energy that is lost?
Answer:
Energy decreases as it moves up trophic levels because energy is lost as metabolic heat when the organisms from one trophic level are consumed by organisms from the next level. Trophic level transfer efficiency (TLTE) measures the amount of energy that is transferred between trophic levels
In which specimen were cells first identified?
Answer:
The specimen where cells were first identified was cork.
hope this helps have a good day
this is responsible for providing shape to the cell
HELP ME PLEASE IM STRUGGLING
How does rainfall positively impact the species and evenness of the ecosystem?
Answer: it gives water to the plants and water for animals to drink
A scientist was investigating why several fish caught from a local stream displayed similar mutations. He found that the water temperature of the stream was elevated since an industrial plant began discharging heated water into the stream. The scientist concluded that increased water temperature during the egg phase led to the mutation in the fish. According to this conclusion, the mutation was caused by
Answer: Increased water temperature caused by the industrial plant.
Explanation: this is explained in the text lol.
Answer:
An Environmental Condition
Explanation:
It explains in the text that it started when an electrical plant began discharging heated water into the stream.
is oxygen an atom or molecule
Answer:
i think its a molecule
Explanation:
Oxygen is found naturally as a molecule.
Which of the following are functions (jobs) of the cell membrane?
Answer:
Biological membranes have three primary functions: (1) they keep toxic substances out of the cell; (2) they contain receptors and channels that allow specific molecules, such as ions, nutrients, wastes, and metabolic products, that mediate cellular and extracellular activities to pass between organelles and between the cell and the outside environment; and (3) they separate vital but incompatible metabolic processes conducted within organelles.
This process does not require the cell to use ______ to move molecules.
It is an example of _______ transport.
Answer:
Energy, passive
Explanation:
This process does not require the cell to use energy to move molecules. It is an example of passive transport.