In this Biology experiment, a dialysis bag containing a starch water mixture was placed in a beaker of water. Over time, the starch water mixture diffused out of the dialysis bag into the surrounding water, resulting in an increase in volume of the mixture.
Explanation:The subject of this question is Biology, specifically related to osmosis and the movement of solutes across a selectively permeable membrane. In the given experiment, a dialysis bag containing a starch water mixture was placed in a beaker of water. Over time, the starch water mixture diffused out of the dialysis bag into the surrounding water, resulting in an increase in volume of the mixture.
This experiment demonstrates osmosis, which is the movement of water molecules from an area of lower solute concentration to an area of higher solute concentration through a selectively permeable membrane. In this case, the dialysis bag acts as the selectively permeable membrane, allowing water to pass through but not the larger starch molecules.
In the experiment, the water outside the dialysis bag had a lower solute concentration than the starch water mixture inside the bag. As a result, water molecules moved into the bag, causing an increase in volume of the mixture. The final volume of 125 mL indicates that the starch water mixture expanded due to the influx of water molecules.
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Unit 1: Nature of Life
1. Science differs from other disciplines, such as history and the arts, because science relies on ___________ .
• facts
• testing explanations
• observations
• theories
2. A scientific hypothesis ___________.
• can be based on personal beliefs or opinions
• can be tested by experiments or observations
• does not have to be tested to be accepted as correct
• is a proven fact with much evidence to support it
3. How does studying science help you be a better member of society?
• Learning the biases of science will help you know what is right or wrong.
• Understanding how science works will help you make better decisions.
• Memorizing science facts will help you become more intelligent.
• Knowing science will help you live without the aid of technology.
4. Which of the following describes a neutral atom of oxygen?
• 6 protons, 6 neutrons, 6 electrons
• 6 protons, 6 neutrons, 8 electrons
• 8 protons, 8 neutrons, 10 electrons
• 8 protons, 8 neutrons, 8 electrons
5. Hershey and Chase used the 35S isotope to label proteins. How does this isotope differ from the 32S isotope found in greatest natural abundance, and why did they choose 35S instead of 32S? (1 point) (hint: what is an isotope of an element and keep in mind what Hershey and Chase needed their “labeled” protein to do)
• 35S has more protons than 32S; Hershey and Chase used it because it has a greater mass.
• 35S has fewer protons than 32S; Hershey and Chase used it because it is radioactive and can be easily traced.
• 35S has more neutrons than 32S; Hershey and Chase used it because it is radioactive and can be easily traced.
• 35S has fewer neutrons than 32S; Hershey and Chase used it because it has a smaller mass.
6. Rank the following in order from most acidic to most basic
• rainwater, coffee, bleach, soap
• coffee, rainwater, soap, bleach
• soap, bleach, coffee, rainwater
• bleach, soap, rainwater, coffee
7. Which of the following are true concerning living things? Check all that apply. (2 points)
• They contain a vital force absent in nonliving things.
• They are composed of molecules that contain carbon-carbon bonds.
• They undergo chemical reactions to use energy they acquire from the environment.
• They do not require catalysts to sustain their living state.
8. Which of the following does NOT match: The monomer _________ makes up the polymer __________.
• amino acids, protein
• fatty acids, DNA
• glucose, starch
• ribonucleotide, RNA
Unit 2: Cells
9. Which organelles are involved in energy transformations, such as photosynthesis and cellular respiration?
• mitochondria and chloroplasts
• mitochondria and ribosomes
• smooth and rough endoplasmic reticulum
• Golgi apparatus and chloroplasts
10. What happens if you put cells in a concentrated salt solution?
• They shrink as water moves from inside to outside the cells as a result of osmosis.
• They burst as water moves from outside to inside the cells as a result of osmosis.
• No change occurs as water freely diffuses back and forth across the cell membranes.
• The cells expend energy pumping water out in response to the greater external salt concentration.
11. What happens during photosynthesis?
• Heterotrophs consume ATP.
• Heterotrophs produce ATP.
• Autotrophs consume carbohydrates in the form of glucose.
• Autotrophs produce carbohydrates in the form of glucose.
12. Which chemical shown in Figure 8–3 is an electron carrier molecule (the ‘hot potato’ that ‘carries’ electrons)?
• H2O
• carbon dioxide
• NADP+
• oxygen
13. Which of the following is NOT a step in the light-dependent reactions? (Look at the diagram above)
• High-energy electrons move through the electron transport chain.
• Pigments absorb light.
• ATP synthase allows H+ ions to pass through the thylakoid membrane
• ATP and NADPH are used to produce high-energy sugars (glucose).
14. Cellular respiration releases energy by breaking down ____________.
• food molecules
• ATP
• carbon dioxide
• water
15. What are the reactants (ingredients) in the equation for cellular respiration?
• oxygen and lactic acid
• carbon dioxide and water
• glucose and oxygen
• water and glucose
Science relies on observations, a scientific hypothesis can be tested, and studying science helps with decision-making, neutral oxygen atom has 8 protons, 8 neutrons, and 8 electrons, Hershey and Chase used 35S because it is radioactive and can be easily traced, ranking from most acidic to most basic is coffee, rainwater, bleach, soap, living things have carbon-carbon bonds and undergo chemical reactions, fatty acids make up DNA, energy transformation organelles are mitochondria and chloroplasts, cells shrink in a concentrated salt solution, during photosynthesis autotrophs produce glucose, NADP+ is an electron carrier molecule, not a step in light-dependent reactions is ATP and NADPH producing glucose, cellular respiration breaks down food molecules to release energy, reactants in cellular respiration are glucose and oxygen
Explanation:Unit 1: Nature of Life
Science differs from other disciplines, such as history and the arts, because science relies on observations.A scientific hypothesis can be tested by experiments or observations.Studying science helps you be a better member of society by helping you make better decisions.A neutral atom of oxygen has 8 protons, 8 neutrons, and 8 electrons.Hershey and Chase chose to use the 35S isotope instead of the 32S isotope because 35S has more neutrons than 32S and can be easily traced because it is radioactive.The correct ranking from most acidic to most basic is coffee, rainwater, bleach, and soap.The true statements concerning living things are They are composed of molecules that contain carbon-carbon bonds and They undergo chemical reactions to use energy they acquire from the environment.The monomer fatty acids make up the polymer DNA.Unit 2: Cells
The organelles involved in energy transformations are mitochondria and chloroplasts.If cells are put in a concentrated salt solution, they will shrink as water moves from inside to outside the cells as a result of osmosis.During photosynthesis, autotrophs produce carbohydrates in the form of glucose.The chemical shown in Figure 8–3 that is an electron carrier molecule is NADP+.Not a step in the light-dependent reactions is ATP and NADPH are used to produce high-energy sugars (glucose).Cellular respiration releases energy by breaking down food molecules.The reactants in the equation for cellular respiration are glucose and oxygen.Learn more about science relies on observations here:https://brainly.com/question/10925400
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The cumulative biological burden caused by daily adaptation to physical and emotional stress leads to _____.
In each ventricle is a blood vessel network called the ________ that produces cerebrospinal fluid.
Which of the following has mechanical energy? bouncing ball water in a reservoir book on a table person running falling tree
Answer:thats not right it 2 and 3
Explanation:
There are a number of lipids that are found in foods and contribute to various functions in the body. triglycerides are the most common lipid found in food and in the body; they consist of a ____________ backbone attached to three fatty acids. fatty acids are classified based on the degree to which the carbon chain is saturated with ____________ . a fatty acid is ____________ if it contains no carbon-carbon double bonds, ____________ if it contains two or more carbon-carbon double bonds, and ____________ if it has only one carbon-carbon double bond. the unsaturated fatty acids can exist in one of two structural forms: the ____________ form occurs when hydrogens on both carbons forming the double bond lie on opposite sides of that bond. when hydrogens on an unsaturated fatty acid lie on the same side of the carbon-carbon double bond, a ____________ formation exists.
Triglycerides consist of a glycerol backbone and three fatty acids. Fatty acids are categorized as saturated, polyunsaturated, or monounsaturated, based on the number of carbon-carbon double bonds. The position of hydrogens in relation to these bonds determines whether the fatty acid is in a cis or trans form.
Explanation:Triglycerides are the most common lipid found in both food and in the human body. They consist of a glycerol backbone attached to three fatty acids. Fatty acids are classified based on the extent to which the carbon chain is saturated with hydrogen. A fatty acid is described as saturated if it does not contain any carbon-carbon double bonds, polyunsaturated if it contains two or more carbon-carbon double bonds, and monounsaturated if it only has one carbon-carbon double bond. Unsaturated fatty acids can exist in two structural forms: In the trans form, hydrogens on both carbons that form the double bond lie opposite from each other. If hydrogens of an unsaturated fatty acid are situated on the same side of the carbon-carbon double bond, a cis formation is created.
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Triglycerides are composed of a glycerol backbone attached to three fatty acids. Fatty acids can be classified based on their saturation level: saturated, monounsaturated, or polyunsaturated. Unsaturated fatty acids can exist in the cis or trans configuration.
Explanation:Triglycerides are the most common lipid found in food and in the body. They consist of a glycerol backbone attached to three fatty acids. Fatty acids are classified based on the degree to which the carbon chain is saturated with hydrogen. A fatty acid is saturated if it contains no carbon-carbon double bonds, polyunsaturated if it contains two or more carbon-carbon double bonds, and monounsaturated if it has only one carbon-carbon double bond. The unsaturated fatty acids can exist in one of two structural forms: the trans form occurs when hydrogens on both carbons forming the double bond lie on opposite sides of that bond. When hydrogens on an unsaturated fatty acid lie on the same side of the carbon-carbon double bond, a cis formation exists.
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Animals are not capable of converting fatty acids into glucose because
Animals are not capable of converting the fatty acid molecules into glucose molecule because fatty acid degradation through the citric acid cycle does not lead to an increase in the oxaloacetate molecule. Thus, the correct option is B.
What is Fatty acid metabolism?Fatty acid metabolism is a two-carbon process in the synthetic directions, there are two carbons which are added at a time to a growing fatty acid chain, and in the degradative direction, the two carbons are removed from the compound at a time. In each case, there is a four-step reaction cycle which gets repeated over and over again.
Animals are not capable of converting most of the fatty acid molecules present in the cell into glucose molecules because in the citric acid cycle (TCA cycle), acetyl-CoA molecule reacts with oxaloacetate and thus, oxaloacetate production can be balanced by the oxaloacetate consumption in the cell. This means that there is no net conversion of acetyl-CoA into oxaloacetate.
Therefore, the correct option is B.
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Your question is incomplete, most probably the complete question is:
Animals are not capable of converting most fatty acids into glucose because... (select all that apply)
a. the products of fatty acid degradation cannot leave the mitochondrion.
b. fatty acid degradation through the citric acid cycle does not lead to a net increase in oxaloacetate..
c. fatty acid degradation products allosterically inhibit the enzymes for gluconeogenesis.
d. fatty acid degradation does not produce sufficient energy in the form of ATP to drive gluconeogenesis.
Heat and chemical treatments can straighten curly hair. Which functional group is responsible for this property of hair proteins? A.)phosphate group. B.)sulfhydryl group. C.) carbonyl group
The sulfhydryl group in hair proteins is responsible for the property of hair that allows it to be straightened through heat and chemical treatments.
Explanation:The functional group responsible for the property of hair proteins that allows heat and chemical treatments to straighten curly hair is the sulfhydryl group. The sulfhydryl group, also known as the -SH group, plays a crucial role in the formation of disulfide bonds which contribute to the overall structure and shape of hair.
When hair is exposed to heat or certain chemicals, such as those found in straightening treatments, the disulfide bonds in the hair proteins can be disrupted. This allows the hair to be reshaped and appear straight.
An example of a chemical treatment that exploits this property is a keratin treatment, which uses a product containing formaldehyde and heat to break and reform the disulfide bonds in the hair, resulting in straightened hair.
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Organisms that use bulk flow to move oxygen are able to:
Rna in cells differs from dna in that ___________________. select one:
a. it is single-stranded and cannot form base pairs
b. the sugar ribose contains fewer oxygen atoms than does deoxyribose
c. it is single-stranded and can fold up into a variety of structures
d. it contains the base uracil, which pairs with cytosine
RNA differs from DNA in that it is single-stranded and can fold into a variety of structures. This feature allows it to perform a vast array of functions inside the cell.
Explanation:RNA in cells differs from DNA in that it is single-stranded and can fold up into a variety of structures. This is indeed one of the key features that makes RNA unique from DNA. Unlike DNA, which is double-stranded, RNA is single-stranded, which allows it to fold into a multitude of different three-dimensional shapes. These complex shapes allow RNA to perform a wide range of functions inside the cell. However, it should be noted that RNA does still form base pairs within itself due to its folded nature, with the base Adenine (A) pairing with Uracil (U), and Cytosine (C) pairing with Guanine (G).
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10.
Life science explores _____.
how living things interact with the earth
the structure of atoms and molecules
humans and their cultures
the nature of the earth and space
Answer:
Life science explores how living things interact with the earth.
Describe three factors that contribute to how much damage is done to living tissue by radiation
The swelling and bursting of a cell due to the influx of water is called ______.
When land inhabited by an organism is destroyed or altered, ______________ occurs?
The answer is Extinction. Destruction of a species habitat causes the reduction in the numbers of a population to a point where the reproductive rates are so low to sustain the population. Extinction may indicate the death of the last member of a population. A renowned example of an extinction event is that of dinosaurs whose habitat was destroyed by a meteorite strike.
which is true if a population is in genetic equilibrium
a) Evolution is occurring
b) new species are evolving
c) allele frequency is changing from one generation to the next
d) allele frequency is remaining the same from one generation to the next
The cells of _____ and _____ have modified mitochondria. the cells of _____ and _____ have modified mitochondria. dinoflagellates ... metazoans diplomonads …parabasalids euglenozoans ... alveolates chlorophytes ... ciliates fungi ... stramenopiles
The cells of diplomonads and parabasalids have modified mitochondria.
Diplomonads and parabasalids are species of protists belonging to the supergroup Excavata. These species are mainly heterotrophic predators and parasites.
The mitochondria in diplomonads is modified to mitosome which are non-functional in aerobic respiration, because of which diplomonads perform anaerobic respiration., The modified mitochondria however is involved in iron and sulphur metabolism.
Similar to diplomonads, p[arabasalids also have modified mitochondria. However, in the case of parabasalids, the mitochondria functions anaerobically, that is carries out anaerobic respiration. It is referred to as hydrogenosome because it produce hydrogen gas as a byproduct of the respiration process.
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Changes in the gene pool can occur due to various mechanisms. In 1989, a large oil spill occurred in Prince William Sound, Alaska, when the Exxon Valdez oil tanker ran aground. Approximately 11 million gallons of oil were spilled and spread 1,300 miles along the Alaskan coastline. The damage from the oil spill affected thousands of animals in the area, including killer whales, harbor seals, sea otters, fish, and sea birds. Which mechanism most likely affected the gene pools of the organism populations in the areas around the oil spill? genetic drift gene flow gene mutation genetic variation
In the given case, the spilling of oil influenced many animals in Prince William Sound, Alaska. Due to spillage, many animals in the region comprising harbor seals, killer whales, fish, sea otters, and seabirds got influenced. It can be considered that genetic drift affected the gene pools of the organisms in the regions around the oil spill.
Variation in the relative frequency of different genotypes in a small populace, due to the chance desertion of specific genes as individuals do not reproduce or die is known as genetic drift.
Answer:
The answer is A
Explanation:
what happens to the force of gravity between two masses if one mass is increased?
A) it increases
B) it decreases
C) it stays the same
D) it it fluctuates
The force of gravity increases when the mass of one of the objects is increased, due to the direct proportionality between gravitational force and the product of the masses involved, as explained by Newton's law of universal gravitation.
Explanation:When the mass of one object is increased, the force of gravity between that object and another mass also increases. This is described by Newton's law of universal gravitation, which states that the gravitational force (F) between two masses (m1 and m2) is directly proportional to the product of their masses and inversely proportional to the square of the distance (r) between their centers. The formula is F = G * (m1 * m2) / r^2, where G is the gravitational constant.
Given this law, if the mass of one object is doubled while keeping all other conditions the same, the force of gravity would also double. This explains why, with more massive objects, the gravitational pull is stronger. As an example, the gravitational pull of Earth on a spacecraft is greater compared to that on a smaller object like a tennis ball, assuming the distance from the center of Earth is the same.
Define cephalization. What is its relationship to bilateral symmetry?
The diagram shows a nucleic acid in the shape of a double helix. mc008-1.jpg Which sugar is present in the nucleic acid that is represented in the diagram?
Answer - Deoxyribose
Under the influence of antidiuretic hormone (adh), _____ is produced. under the influence of antidiuretic hormone (adh), _____ is produced. urine containing more glucose bloody urine urine containing a lower concentration of urea more concentrated urine less concentrated urine
Under the influence of antidiuretic hormone (ADH), urine containing a lower concentration of urea is produced.
What is ADH?ADH, also known as vasopressin, is a hormone released by the pituitary gland that helps regulate water balance in the body.
When ADH is present in higher levels, it increases water reabsorption by the kidneys, resulting in reduced water loss through urine.
As a result, urine becomes more concentrated with a lower concentration of urea and other waste products.
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In Stage 1 of his lab, Gunther adds 20 mg of solute into a solution. He stirs it and it completely dissolves. In Stage 2, he adds 20 mg more of solute and stirs, but this time, some settles out. In Stage 3, he then heats his solution, adds 20 mg more,and the solute completely dissolves.
Which best explains his experiment?
A)Stage 1 demonstrated a saturated solution, Stage 2 demonstrated an unsaturated solution, and Stage 3 demonstrated a supersaturated solution.
B)Stage 1 demonstrated an unsaturated solution, Stage 2 demonstrated a saturated solution, and Stage 3 demonstrated a supersaturated solution.
C)Stage 1 demonstrated a supersaturated solution, Stage 2 demonstrated a saturated solution, and Stage 3 demonstrated an unsaturated solution.
D)Stage 1 demonstrated an unsaturated solution, Stage 2 demonstrated a supersaturated solution, and Stage 3 demonstrated a saturated solution.
I think the answer is B) Stage 1 demonstrated an unsaturated solution, Stage 2 demonstrated a saturated solution, and Stage 3 demonstrated a supersaturated solution.
Which is an essential commodity needed for the productive process?
Answer: its labor just got it right on apex
Once researchers identified dna as the unit of inheritance, they asked how information was transferred from the dna in the nucleus to the site of protein synthesis in the cytoplasm. what is the mechanism of information transfer in eukaryotes?
After a transurethral resection of the prostate, the retention catheter is pulled taut and secured to the client's leg. the client reports a feeling of pressure and asks why this is necessary. what rationale should the nurse include in a response to this question?
Answer Explanation:
The patient needs to be explained that he needs a bladder catheter that is placed in the bladder to help make the process of draining the urine possible for a few days after surgery while recovering.
The patient who should have a permanent bladder catheter may go through the phases similar tothose that happen in a grieving situation since while accepting the new situation which is uncomfortable.
It is important that the patient does not feel alone in the process when they leave home and that a person educated in the subject periodically evaluates the self-care of the catheter, and that the patient is taught to prevent complications
Most drugs have three different kinds of names. which of them belongs to a specific manufacturer?
The third stage of cellular respiration is
A- they Krebs cycle
B- the electron transport chain
C- fermentation
D-glycolysis
Lol the next question has the answer in it
Susan is a geological researcher measuring the rate of removal of phosphorous from sedimentary rock during the phosphorous cycle. What process is Susan investigating? mineralization eutrophication weathering decomposition
The correct answer is weathering.
The dissociation of soil, rocks, and minerals, as well as wood and artificial components via exposing with the atmosphere of the Earth, biological species, and water, is known as weathering.
In the phosphorus cycle, the phosphorus moves in a cycle via water, rocks, sediments and soil, and organisms. In this cycle, with time, the process of weathering and rain makes rocks to discharge phosphate ions and other minerals. This inorganic phosphate then gets dispersed in water and soils.
The answer is weathering.
Weathering is the breaking down of rocks, soil and minerals as well as artificial materials through contact with the Earth's atmosphere, biota and waters.
HELP!
In pea plants, the gene for the color of the seed has two alleles. In the following Punnett square shown below, the dominant allele (Y) represents yellow and the recessive allele (y) represents green.
Punnett Square showing a grid that is blank with 4 empty boxes, two columns and two rows. The female parent plant across the horizontal side, top, of the grid indicates a yellow phenotype and a genotype of Yy. The male parent plant along the vertical side of the grid indicates a yellow phenotype and a genotype of YY.
Based on the Punnett square, what percentage of offspring would be expected to have green seeds?
Parents : Yy (female) x YY (male)
Gametes: Y and y (from female) ; Y and Y (from male)
F1 generation: YY (yellow); Yy (yellow) ; YY (yellow); Yy (yellow)
So we will observe yellow seeds only in the F1 generation. Since there is no homozygous recessivie"yy" genotype in F1 generation, 0% of the offspring would be expected to have green seeds.
None of the offspring is going to have green seeds.
The male parent = YY
And they are yellow
The female parent = Yy
and they are also yellow.
The Punnet SquareWe do this to get the phenotype of the other generation. We match Yy with YY
YY * Yy
Y y
Y YY Yy
Y YY Yy
This gives a generation with 50 percent having the fathers YY and the other 50% having Yy
This then means that the phenotype for all these offspring would be yellow all throughTherefore non of them would be green.Read more on the punnet square here:
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How do strides indicate whether the walker is a male or female?
A geneticist introduces a transgene into yeast cells and isolates five independent cell lines in which the transgene has integrated into the yeast genome. in four of the lines, the transgene is expressed strongly, but in the fifth there is no expression at all. which is a likely explanation for the lack of transgene expression in the fifth cell line?