If actively dividing eukaryotic cells were treated with a chemical that blocks the activity of the enzyme telomerase, then these cells would lose DNA at the ends of the chromosomes over many generations.
Telomerase are enzymes that play a major role in maintaining the proper chromosomal length of chromosomes. They help in the formation of telomers which are repetitive sequences found at the end of each chromosome. This unique repetitive sequence helps in keeping the chromosomes intact.
If the activity of telomerase will be blocked, telomers will not be able to form. Due to this, sections of DNA will be continuously lost from the chromosomes as there will be no telomers at the end. As more and more DNA will be lost, the integrity of the chromosomes will not be maintained.
Without telomerase, the ends of the DNA will also not be able to replicate. Hence, causing DNA to be lost over many generations.
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A student has a pure culture of bacteria growing in a flask and wants to know how many living cells are in the culture at a given time. Which method should she employ to get an estimate?.
A student has a pure culture of bacteria growing in a flask and wants to know how many living cells are in the culture at a given time. Plate counting is the method should she employ to get an estimate.
It is a technique to determine the number of living cells in a sample using different steps.
The sample (1g) is first diluted with a suitable diluent (9g) and then mixed together. This solution is then added to another (9g) diluent. It is repeated to get a number of series.
The sample is then plated on an agar plate. These plates are then moved to an incubator at a suitable growth temperature.
We then calculate the plates having colonies between 50-300. Now we have to calculate the number of organisms that were in the original sample.
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Predict what happens to cell membrane composition in the brain of a wolf living in yellowstone national park with hot summers and cool winters.
Seasonal changes will not affect the fatty acid content of the cell membranes.
Cell Membrane- All cells have a cell membrane, also known as a plasma membrane, which divides the inside of the cell 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 by the cell membrane.
Fatty Acid Content in Cell Membrane- When operating alone or as a component of other molecules, fatty acids (FA) have a variety of roles in cells, including those of the structural "building blocks" of cell membranes as well as those of energy and signaling molecules. Either external sources or de novo FA synthesis provide the cells' FA.
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I will mark you the Brainliest! What do they talk about on module 1 biology DBA?(9th, ASU Prep)
Answer:
If there's not a study guide, try going over your notes. Typically teachers let you choose what you talk about, but I'm in flvs. It's been a while since I've been in bio, but you got it. (last year) it's not as scary as you think. You can always look at the lesson while yall talk!
Explanation:
Hope this helps and good luck!
Answer:
There are quizlet flash cards you can use, sadly i cant put the link for you bc it wont let me.
I need help with this question. I don't get it. Can someone please help me?
Magnification can help by observing microscopic objects.
What is magnification?When it comes to optics, magnification refers to how big a picture is in comparison to the thing that created it. The ratio of the image length to the object length as measured in planes perpendicular to the optical axis is referred to as linear magnification, also known as lateral or transverse magnification.
An inverted picture is represented by a linear magnification value of zero. As measured all along the optical axis, longitudinal magnification is the amount by which an image grows in size. When measured from a specific point in the instrument, as is the case with magnifiers and binoculars, the ratio of the digressions of the angles separated by an object and its image is known as angular magnification.
Therefore, magnification can help by observing microscopic objects.
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what causes lighting
Breve resumen de la historia de gregor mendel
Please find below a brief summary of the history of Gregor Mendel:
Gregor Mendel was an Austrian monk who conducted experiments in his garden to uncover the fundamentals of genetics. Mendel is widely regarded as a pioneer in the field of genetics because his observations served as the basis for contemporary genetics and the study of heredity.Plant height, pod shape and color, seed shape and color, flower location and color—these are the seven pea plant traits that Mendel studied. Mendel demonstrated, for instance, that cross-breeding a true-breeding yellow pea with a true-breeding green pea resulted in offspring that always produced yellow seeds. However, the green peas returned in the following generation at a ratio of 1 green to 3 yellow. Mendel first used the phrases "dominant" and "recessive" to describe various qualities.Mendel's work was not fully appreciated until the turn of the 20th century (more than three decades later), when his laws were reintroduced. The modern era of genetics began in 1900 with the independent confirmation of some of Mendel's experimental findings by Hugo de Vries, Erich von Tschermak, and Carl Correns.Learn more about Gregor Mendel here:
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Which term matches this definition?
membrane-bound organelle in the center of
a plant cell that stores water and nutrients
A. cell membrane
B. cytoplasm
C. ribosome
D. central vacuole
D. Central vacuole
What is the name of the network of proteins that gives support to a cell and allows movement?
Answer:
that would be the cytoskeleton
Explanation:
State the duration of insolation at the following latitudes:
a. Equator (0 degrees)
b. New York (42 degrees North)
c. North Pole (90 degrees North)
d. South Pole (90 degrees South)
what is the equation for photosynthesis?
Answer:
6CO2 + 6H2O → C6H12O6 + 6O2
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6CO2 + 6H2O → C6H12O6 + 6O2.what does the word eukaryote mean
Answer:
Well it's a generic term for organisms which possess eukaryotic cells (cells with central nucleus and their plasma membrane)
Answer:
is a living oranism other than the eubacteria and archaea
Explanation:
it consists of cells which genetic materials (DNA) in form of chromomes contained within a distinct nucleus
Which wavelength of light would photosynthesis be at its lowest?
A) 550nm
B) 450nm
C) 650nm
D) 400nm
Answer: C
I think so... Not really sure. Extremely sry if it's wrong. I tried. :)
Answer:
D) 400nm
Explanation:
Plants use light of wavelength between 400-700nm 3
Suppose a 0.1M solution of a monosaccharide contains 1000 monosaccharide
molecules. How many monosaccharide molecules would be in a 0.1 M
solution of a disaccharide?
0.1 M solution of a disaccharide solution will contain 2000 monosaccharide molecules.
What are monosaccharides?Monosaccharides, also known as simple sugars are the simplest monomers of carbohydrates which may either be 3 carbon, 4 carbon, 5 carbon, 6 carbon or 7 carbo compounds.
There are two types of monosaccharides;
aldoses sugars, e.g. glucose, andketose sugars e.g. fructose.When two monosaccharides are linked together by glycosidic bonds to form a single compound, the compound formed is called a disaccharide.
Considering the give question:
Suppose a 0.1M solution of a monosaccharide contains 1000 monosaccharide molecules. How many monosaccharide molecules would be in a 0.1 M solution of a disaccharide.
The number of monosaccharides molecules present in the 0.1 M solution of a disaccharide is determined as follows:
1 disaccharide molecule contains 2 monosaccharide molecules
0.1M solution of a monosaccharide contains 1000 monosaccharide molecules.
0.1 M solution of a disaccharide will contain 2 * 1000 monosaccharide molecules
0.1 M solution of a disaccharide will contain = 2000 monosaccharide molecules.
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PLEASE ANSWER THIS I HAVE ONLY A BIT OF TIME LEFT AND PLEASE MAKE A SIMPLE BUT INFORMATIVE FOR THE FIRST QUESTION AND A SIMPLE REASON FOR THE SECOND!!!
describe the relationship between a cell's surface area-to-volume ratio and the transport of wastes from inside the cell to the outside environment.
AND
If a cell's surface area-to-volume ratio increased from 3:1 to 4:1, what impact would that have on the transport of materials across the cell membrane?
A. It would be unchanged
B. Transport would increase
C. Transport will decrease
D. None of the above
Answer: b
Explanation:
the ultimate measure of a man is not where he stands in moments of comfort and convenience but where he chooses to stand at time of challenge and controversy agree or disagree
This quote was given by martin Luther king " The ultimate measure of a man is not where he stands in moments of comfort and convenience but where he chooses to stand at the time of challenge and controversy agree or disagree.
Who is martin Luther?The ultimate test of a man, according to Martin Luther King Jr., is not where he stands in moments of convenience and comfort but rather where he stands in situations of challenge and controversy.
According to this saying, a man's genuine character and personality are only shown in difficult situations and when they are put under strain.
Martin Luther King Jr. uses the words controversy and challenges to be more explicit about the types of fights he is speaking to the people about. A controversy is an argument that an opposing party or big group of people strongly disagree with.
Therefore, This quote was given by martin Luther king " The ultimate measure of a man is not where he stands in moments of comfort and convenience but where he chooses to stand at the time of challenge and controversy agree or disagree.
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The krebs cycle produces atp, nadh, fadh2, and releases ______, which contains the carbon atoms remaining from the original 6-carbon glucose molecule.
The Kreb's cycle produces ATP, NADH, FADH₂ and releases CO₂, which contains the carbon atoms remaining from the original 6-carbon glucose molecule.
The Kreb's cycle, also called the citric acid cycle, or TCA (Tricarboxylic acid) cycle is a series of reactions that are catalysed by enzymes and occur in the matrix of the mitochondria. In the reaction, acetyl-CoA, the end product of glycolysis gets oxidized and produces ATP, high energy compounds - NADH and releases CO₂ as a by-product.
The Krebs cycle is the second stage of cellular respiration. The first stage of cellular respiration is glycolysis, which occurs in the cytosol of the cell. In glycolysis, one glucose molecule undergoes partial oxidation to give two pyruvate molecules. The pyruvate molecules undergo further oxidation in the matrix of the mitochondria to produce acetyl-CoA. Here, glycolysis ends, and the Krebs cycle begins.
The two molecules of acetyl-CoA formed from the pyruvate molecules then enter the Kreb's cycle. Acetyl-CoA is combined with oxaloacetate, a four-carbon compound, and produces ATP, NADH, FADH₂ and 2 molecules of CO₂ as by-product.
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In the electron transport chain, a molecule of quinone receives an electron from fmn (also known as complex 1) and becomes a molecule of quinol. which is the reduced form of the molecule?
The NADH transfer the electron to the first complex1.The electron then move through a series of iron sulphur protein and reducing it to QH2 called as quinol.
What is an electron?An electron is a negative charges subatomic particle that can exist either free or bonded to an atomic (not bound).. One of the three main types of particles within an atom is an electron that is bonded to it; the other two are protons and neutrons.
How many electrons do atoms contain?The number of electron shells is equivalent to the atomic quantity of an element for neutrally charged species. This shows that an element's protons and electrons are distributed equally.. Consequently, there are 8 electrons in oxygen.
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the enzymes that splice the introns out of the initial mrna strand are . rna polymerases small nuclear ribonucleoproteins proteasomes messenger rna molecules
The enzymes that splice the introns out of the initial mRNA strand are proteasomes
The proteasome is a highly sophisticated the protease complex designed to carry out the selective, efficient and the processive hydrolysis of the client proteins. It is also known as to collaborate with the ubiquitin, which was polymerizes to form the marker for the regulated proteolysis in the eukaryotic cells. the Proteasomes are the protein complexes which was degrade unneeded or the damaged proteins by the proteolysis, a chemical reaction that may breaks the peptide bonds. Enzymes that can help such as reactions are called as proteases.
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Diseased animal cells may produce molecules that activate death cascades to kill the cells in a controlled manner. Why would neighboring healthy cells also die?.
Answer:
neighbouring healthy cells will die when molecules activate death cascades because the death molecule passes through gap junctions.
The area of the brain stem that is important in controlling breathing is the? a. suprachiasmatic nucleus b. cerebellum c. limbic system d. medullae. hippocampus
Answer:Medullae
Explanation:Midbrain,pons and medulla oblongata are collectively called the brain stem.The bottom part of the brain stem helps regulating automatic functions such as breathing,heartbeat,blood pressure,respiration and swallowing.
Symbiotic relationships are always between a plant and an animal.
true
false
Answer:
False
Explanation:
because sometimes symbiotic relationships are seen as plant and plant or animal and animal
A swimmer sprints a short distance for a competition. The swimmer is not able to take in enough oxygen to make the ATP needed for the sprint. Which of the following processes is most likely going to occur in the swimmer's muscle cells during the competition? (4 points)
1. A protein acts as a channel to allow large, hydrophilic molecules to diffuse across the cell membrane.
2. A protein acts as a pump and moves calcium ions from an area of low concentration to an area of high concentration.
3. The cell membrane folds to surround a substance and bring the substance inside the cell during exocytosis.
4. Water moves by osmosis from higher concentration to lower concentration by passing through proteins called aquaporins.
The process that is most likely going to occur in the swimmer's muscle cells during the competition is C. The cell membrane folds to surround a substance and bring the substance inside the cell during exocytosis.
How to illustrate the information?The main molecule for storing and transferring energy in cells is adenosine 5'-triphosphate (ATP). It is frequently referred to as the cell's energy currency and is like the money that is kept in a bank.
The ATP (Adenosine triphosphate) will be impaired if the swimmer is unable to breathe in enough oxygen to power through the sprint. The body will employ anaerobic respiration to make ATP under these circumstances. Without oxygen, anaerobic respiration takes place. In the respiratory cycle, it substituted the electron acceptors for oxygen. However, anaerobic respiration produces less ATP than aerobic respiration.
Therefore, the cell membrane folds to surround a substance and bring the substance inside the cell during exocytosis.
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Which of the following statements about a
controlled experiment is true?
a. All the variables must be kept the same.
b. Only one variable is tested at a time.
c. Scientists always use controlled experiments.
d. Controlled experiments cannot be performed
on living things.
Answer: The controlled experiments are performed by the scientists when they want to study the changes in the sample by changing a single variable. So, the correct answer is option (b).
Explanation:
In case, all variables are kept same, no changes would be observed in the experiment sample. A controlled experiment can be performed on living things as well as non-living. But, controlled experiment cannot be performed on the things which are influenced by a lot of variables, as they cannot create realistic results. So, the option (a), (c), and (d) are incorrect.
This is the most diverse of all the marine ecosystems. This marine ecosystem not only includes great biodiversity but at least one quarter of all ocean species depend on it for food and shelter. What is this marine ecosystem?.
This is the most diverse of all the marine ecosystems. This marine ecosystem not only includes great biodiversity but at least one-quarter of all ocean species depend on it for food and shelter. This marine ecosystem is the coral reefs.
According to studies, coral reefs are thought to have the most diverse species in the field of ecology. Coral reefs' rich biodiversity contributes to the sustainability of ocean life. Numerous polyps, which are thousands of coral reefs found underwater, support other aquatic species in a variety of ways.
The zooxanthella, a relationship between the polyps and algae, is found inside each polyp. This alga triggers photosynthesis, which produces food for the polyp and other marine species. In addition to providing humans with many other benefits, coral reefs also clear land for them. Since coral roofs have the greatest biodiversity, they benefit other organisms in a variety of ways.
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Which part of the gi tract does not actively participate in the digestion of carbohydrates?
Stomach is the part of the GI tract does not actively participate in the digestion of carbohydrates.
Carbohydrates are first mechanically and chemically broken down in the mouth. Mastication, another term for chewing, breaks down the meals high in carbohydrates into ever-tinier bits. Saliva that covers the food particles is produced by salivary glands in the mouth cavity. Salivary amylase is an enzyme found in saliva.
Dietary carbohydrates are converted to glucose, fructose, and/or galactose in the small intestine and then absorbed into the blood. The breakdown and absorption of dietary carbohydrates can be influenced by a variety of factors.
The given question is incomplete, find below the complete question,
Q. Which part of the GI tract does NOT actively digest carbohydrates?
a)small intestine
b)stomach
c)pancreas
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What type of transport requires energy to carry a nutrient from outside the cell, through the cell membrane, and into the cell?.
The growth characteristics of a bacterial culture streak on an agar slant will not be the same as if the streak were on an agar plate. True or false?.
The growth characteristics of a bacterial culture streak on an agar slant will not be the same as if the streak were on an agar plate statement is false.
Bacterial Culture- A microbiological culture, also known as a microbial culture, is a technique for growing microbial organisms in a controlled laboratory environment while allowing them to reproduce in a predefined culture media. In molecular biology, microbial cultures are fundamental diagnostic techniques that are employed as research tools.
Agar Plate- Agar and several nutrients are present on a Petri dish known as a "agar plate" (food for the microorganisms). It's employed to cultivate microorganisms.
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Define the words cell.
Answer:
the word cells are called cells because cells are cells so cells have to be cells so to get cells you have to add cells and then subtract cells then add cells again to give you sales
Answer:
the smallest structural an organism, typically microscopic and consisting of cytoplasm and a nucleus enclosed in a membrane. Microscopic organisms typically consist of a single cell, which is either eukaryotic or prokaryotic.
Explanation:
Hope it helps! =D
The compounds in biological membranes that form a barrier to the movement of hydrophilic materials across the membrane are.
The compounds in biological membranes that form a barrier to the movement of hydrophilic materials across the membrane are lipid.
Biological Membrane- A biological membrane, also known as a bio membrane or cell membrane, is a selectively permeable membrane that divides a cell's interior from its surroundings or establishes intracellular compartments by acting as a wall between different parts of the cell.
Hydrophilic- Being highly affine to water is referred as as being hydrophilic. Hydrophilic substances quickly dissolve into water and are soluble in it.
Membrane Lipid- Lipids serve as crucial membrane structural elements, signaling molecules, chemical markers for particular membranes, and energy storage molecules.
The given question is incomplete, find below the complete question,
Q. The compounds in biological membranes that form a barrier to the movement of hydrophilic materials across the membrane are
a. integral membrane proteins.
b. carbohydrates.
c. lipids.
d. nucleic acids.
e. peripheral membrane proteins.
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If heavy exercise produces lots of co2 in the body, will the blood become more acid or more basic?.
Yes, the blood become more acidic during the heavy exercise because of the production of CO2 in the body.
Acidic Blood- Exercise that is vigorous will drop blood pH and increase blood acidity. This happens because during intense activity, muscle cells are compelled to engage in anaerobic respiration. Lactic acid is a byproduct of this kind of cellular respiration. The blood's pH level will decrease in the influence of this acid.
Anaerobic respiration- It's a process that happens without any oxygen gas. In this mechanism, glucose is broken down to provide energy without the need of oxygen. The fermentation of yeast is among the greatest illustrations of anaerobic respiration.
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