Answer:
The correct answer is - No, it is not valid because the short distance means there will be a lot of error due to the student's reaction time.
Explanation:
In this experiment to determine the acceleration due to gravity, there may be errors because of the student’s reaction time. The reaction can be late or early than prior reactions.
The other error can be caused by the distance was only at arm’s length throughout the experiment, which means that there was no independent variable that is the difference or change in the distance. This also makes the experiment invalid.
discuss the reaction in tricarboxylic acid cycle
The tricarboxylic acid cycle also known as the Kreb's cycle consists of eight cycle wherein a molecule of acetylCoA is used to produce three NADH, one FADH2 and one GTP/ATP molecule.
What is the tricarboxylic acid cycle?The tricarboxylic acid cycle is a sequence of reactions in which acetylCoA molecules from the glycolytic pathway are used to produce the reducing equivalents NADH ad FADH2 which are used to produce ATP in the electron transport chain.
The tricarboxylic acid cycle also known as the Kreb's cycle consists of eight cycle wherein a molecule of acetylCoA is used to produce three NADH, one FADH2 and one GTP molecule.
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Explain how a bottleneck event can enrich recessive traits in the genetics of a population.
Answer
A bottleneck event severely reduces the fraction of a species able to pass on their genes to offspring. Any once rare recessive traits present in the surviving breeding population are passed to a larger fraction of the total population of offspring, thereby enriching those recessive traits in the total gene pool .
Bottleneck events can limit variation if the dominant allele population gets wiped out for any reason and the recessive allele can appear to be in the majority however this does not shows the actual makeup of the population.
What is bottle neck effect?The bottleneck effect is defined as a reduction and subsequent increase in a population's size affects the distribution of genetic variation among its individuals.
Examples of bottle neck effect is when the northern elephant seals have reduced genetic variation likely because of a population bottleneck humans imposed on them in the 1890s. Hunting reduced their population size to as few as 20 individuals at the end of the 19th century.
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PLEASE HELP ASAP PLEASE FAST
Answer:
D
Explanation:
the water passes through the semi permeable membrane
Suppose a researcher introduces a mutation into the glucosidase domain of the mammalian glycogen debranching enzyme. The mutation inhibits the activity of the glucosidase but does not affect the other functions of the enzyme. The researcher then introduces the mutated enzyme into mammalian cells that do not express wild type glycogen debranching enzyme. Predict the effect of the mutation on glycogen metabolism.
Answer:
cells will have glycogen molecules with branches of a single glucose residue
Explanation:
Glycogen debranching enzymes are proteins that catalyze the removal of branching from glycogen, which is a multibranched polysaccharide composed of glucose units and serves as a form of energy storage. These enzymes have two catalytic activities on a single polypeptide chain: glucosyltransferase and glucosidase activities, which are both required for glycogen breakdown. Glycogen degradation requires both glycogen phosphorylase and glycogen debranching enzymes. First, a glycogen phosphorylase acts to digest a glycogen branch down to four glucose residues. Subsequently, the debranching enzyme through its glucosyltransferase activity acts to transfer three glucose residues to a nearby branch of the glycogen chain. Finally, through its glucosidase activity, the debranching enzyme cleaves the remaining α-1,6 linkage in order to release free glucose.
What is gylcosylation
Glycosylation is the reaction in which a carbohydrate, i.e. a glycosyl donor, is attached to a hydroxyl or other functional group of another molecule in order to form a glycoconjugate. In biology, glycosylation usually refers to an enzyme-catalysed reaction, whereas glycation may refer to a non-enzymatic reaction.
hi, define chemistry and mention the three branches of chemistry answer it fast .Good night
Explanation:
Branches of inorganic chemistry include: ... Nuclear chemistry — the study of radioactive substances. Organometallic chemistry — the study of chemical compounds containing bonds between carbon and a metal. Solid-state chemistry — the study of the synthesis, structure, and properties of solid materials.
Answer:
The five primary branches of chemistry are physical chemistry, organic chemistry, inorganic chemistry, analytical chemistry, and biochemistry.
How would you
change the hypothesis if mussels died in
both aquariums?
The new hypothesis could be that there is another alternative factor that is negativey afecting dwarfs survivorship.
The previous hypothesis of high levels of phosphate killing mussels is not necessarily disproved. But the death of mussels from both the control and the treatment groups might be related to one of the controlled variables that could be actually afecting them.
----------------------
Probably different levels of phosphate are also affecting invididuals´ survivor rates. However, the fact that mussels from all the aquariums died suggests that there is something else going on that caused the death of all the individuals.
The control group is used to identify any other factors influencing the results obtained in the study, apart from the modified variables of the treatment. Individuals of the control group are selected from the same population as the treatment group. These two groups are identical in all aspects except for the independent variable, which changes in the treatment group but remains constant in the control group.
We know that mussels in this experiment were taken from the same population and grown under the same controlled conditions. Only the treatment group received phosphate, but all mussels died, not only the ones that receive phosphate. This result turns to be useful because it is indicating that there is another variable that is killing mussels. Phosphate might be a cause of death, but there is also something else. So the researchers should pay attention to the controlled variables, such as water quality, temperature, pH, food supply, light exposure, or others.
These variables might be reflecting the real conditions under which mussels live. The results tell that one of these is related to individual death and could be a consequence of climate change or soil use, among other causes.
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As with most fluid samples sent for microbiological analysis, Mandy starts her investigation with a Gram stain.
Gram Stain Analysis Classify the infectious agent based on the Gram staining.
Hi. Unfortunately your question is incomplete and you have not shown any photos of the sample that Mandy must identify by Gram stain. However, after researching her question on the internet, I was able to find another question exactly like this one, which showed the microorganism that should be analyzed. This image is attached below. In that case, I hope the answer below can help you.
Answer:
Gram-positive cocci
Explanation:
It is possible to identify that the microorganism presented is a bacteria due to the application of the test known as Gram stain, which allows the identification of gram positive and gram negative bacteria. This test allows the bacteria to be subjected to a specific dye that reacts with the chemical composition of the bacteria, modifying its color. Gram positive bacteria show a blue color after the test, while gram negative bacteria show a red color after the test.
As we can see in the attached image, the bacteria that Mandy is analyzing shows a blue color, after being submitted to Gram stain, being then a gram positive bacteria.
We can also see that the colonies of this bacterium have formed round, similar to a coconut and for this reason, we can conclude that the bacterium has the shape known as cocci.
Therefore, we can classify the microorganism as a Gram-positive cocci.
Spinal cord is blank to the esophagus
Answer:
posterior
Explanation:
packaging methods of watermelon
Answer:
The packing process consists of:
The workers remove the watermelons from the bulk cardboard bins and place them onto the packing line.
The watermelons pass through three different brush steps (without the use of any wash water)
The watermelons are labeled and packed into large cardboard bins once again.
Explanation:
How much of Yellowstone burned in 1988?
Answer:
The 1988 fires affected approximately 800,000 acres (or ~36%) of the park. Five fires burned into the park that year from adjacent public lands, including the largest, the North Fork Fire. It started accidentally and burned more than 410,000 acres.
Explanation:
A geneticist finds that a strain of bacteria to produces a non-functional sigma factor. Which among the following steps in transcription would most likely be first affected?
A.Assembly of RNAP onto the DNA strand
B.Identification and binding of RNAP on to the promoter sequence
C.Conversion of open initiation complex to closed initiation complex
D.Synthesis of RNA after the formation of open initiation complex
Answer:
The correct answer is - B. Identification and binding of RNAP onto the promoter sequence.
Explanation:
Bacterial RNA polymerases have subunits known as Sigma factors responsible for the identification and specificity of promoter binding of RNAP and regulate the efficiency of RNA synthesis during transcription is initiated.
These bacteria producing the nonfunctional subunits of RNA polymerase or sigma factor will be unable to identify and tightly bind to promoter elements that are RNAP.
For humans, brown eyes (B) are dominant over blue eyes (b). If a heterozygous brown-eyed male had a child with a blue-eyed female, what percentage of the offspring (F1 generation) would have blue eyes?
Answer:
50%
Explanation:
When you use a monohybrid cross you will get Bb, Bb,bb,bb
Since the brown eyed are heterozygous.
why do children need more protein
in there diet
Transfusion of type AB blood would introduce both A and B ______________ which would be ______________ monosaccharides type
Answer: hello your question is poorly written below is the question
answer:
Tetrasaccharides, Recognized, Triggers, Type B, Type A, Type O, Not recognize, TetrasaccharidesExplanation:
Both A and B Tetrasaccharides which would be Recognized as foreign and Triggers an immune reaction in recipients lacking either the A saccharide Type B or B Type A or both Type O . meanwhile the type AB blood would contain both A and B and would Not recognize those Tetrasaccharides as foreign
From a chemical view, how is an amino acid is being recognized by its specific aminoacyl tRNA synthetase?
Answer:
An aminoacyl-tRNA synthetase (aaRS or ARS), also called tRNA-ligase, is an enzyme that attaches the appropriate amino acid onto its corresponding tRNA. It does so by catalyzing the transesterification of a specific cognate amino acid or its precursor to one of all its compatible cognate tRNAs to form an aminoacyl-tRNA.
Which of the following is a feature of beaches?
A. Berms
B. Runnels
C. All of these
D. Shingles
Answer:
C: All of these.
Explanation:
Because there is feature
You classified organisms based on anatomical structure and development. Scientists also use DNA to classify organisms. Considering the basic process of evolution, why do you think it’s important to also consider DNA and gene patterns during the classification of organisms?
Answer:
By studying genetics and DNA, we can get the best idea of how species are related to each other, and therefore how to classify them. The genetic code of a species is not fixed, however. It changes over time! This is why we also need to factor in evolution.
It is important to also consider DNA and gene patterns during the classification of organisms because,
Through genetics and DNA study, we can get the idea of how species are related to each other and how to classify them. The genetic code of a species is not fixed. So, it need in evolution.How organism classified ?The organism classified on the basis of shared characteristics.The classification of living organism includes seven levels, kingdom, phylum, classes, order, families, genus and species.What is evolution?It is witness in the living species and change in heritable traits of biological population over successive generation.The process of development of complex organism from simpler one with time is called an evolution.learn about gene,
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If brown eyes are recessive to blue eyes, then which of the following would represent a mouse with brown eyes?
1.) ee
2.) EE
3.) Ee
4.) eE
Answer:
ee
Explanation:
ee is recessive
GOLGI APPARATUS IS THE IMPORTANT SITE OF FORMATION OF____________& ______________
GOLGI APPARATUS IS THE IMPORTANT SITE OF FORMATION OF GLYCOPROTEINS & GLYCOLIPIDS.
Please help me with this.
Answer:
D
Explanation:
Gene pool is the total genetic diversity within a population or species
Answer:
D
Explanation:
hope it helps.
If you were given the power to control the United States government and policy what changes would you make regarding the environment and how would you fund these? You can consider your response to the question and/or include other issues.
Answer:
i would probably fund different jails using taxes. there's absolutely no reason someone who accidently committed tax fraud should be sitting in the same cell as aconvicted murderer. & abd I would make harder consequences for hate crimes. like jail time.
Which of the following counteracts the movement of bicarbonate ions from the RBC?
A) chloride shifting
B) the Haldane effect
C) release of hydrogen ion
D) the Bohr effect
Answer:
A) chloride shifting
Explanation:
because in movement of bicarbonate ion, there. is exchange of carbonic acid and chloride ion in RBC which is called chloride shift.
Answer: A. chloride shifting
what is DNA fingerprinting?
Answer:
DNA fingerprinting is a technique that simultaneously detects lots of minisatellites in the genome to produce a pattern unique to an individual. This is a DNA fingerprint. The probability of having two people with the same DNA fingerprint that are not identical twins is very small.,,,,,Answer:
It's a laboratory technique used to establish a link between biological evidence and a suspect in Criminal investigation. It's also known as genetic fingerprinting.
all biomolecules are mad up of the elements. A.carbon, hydrogen, nitrogen, oxygen, and sulfur B. carbon, hydrogen, nitrogen, and oxygen C. carbon, hydrogen, and oxygen D. carbon, hydrogen, oxygen, and sulfur
Answer:
Option(A) carbon ,hydrogen,nitrogen,oxygen and sulphur.
Answer:
A.carbon, hydrogen, nitrogen, oxygen, and sulfur
Explanation:
There are five elements that are essential to life. These are Carbon, Hydrogen, Nitrogen, Phosphorous and Sulfur, or CHNOPS for short. We can see that only option A has nitrogen listed. Nitrogen is absorbed by plants through the soil, and by animals through food. It is absolutely essential for many forms of life, especially plants and animals. Many biomolecules contain Nitrogen. Only one choice on this list contains nitrogen and that is option A. Therefore option A is the answer.
Hãy mô tả các bước tạo thư viện cDNA từ tế bào máu heo.
Answer:
What you mean bro?
Explanation:
In eukaryotes, miR-5 is a microRNA with sequence complementarity to the 3’UTR of the mRNA transcript encoded by the UCD gene. The UCD gene encodes for a protein that acts as an allosteric activator of the protein p101. The p101 protein is a DNA methyltransferase (DNMT) which is an enzyme that methylates DNA when the protein is in its active form.
A) In a lung cancer cell line, the p101 protein is overly active leading to misregulation of gene expression. In these lung cancer cells which of the following would be a correct prediction in regards to miR-5? [choose ALL that apply, note that incorrect selections will deduct points]
A) The gene encoding miR-5 is in a region of chromatin with hypoacetylation
B) The gene encoding miR-5 is in a region of chromatin with hyperacetylation
C) The gene encoding miR-5 in a region of euchromatin
D) The gene encoding miR-5 in a region of heterochromatin
E) The miR-5 transcript is translated at high levels
F) The miR-5 transcript is activating translation of the UCD gene
B) A different lung cancer cell line is found to have significantly decreased amounts of DNA methylation. Which of the following could explain why there is decreased DNA methylation in this cell line? [choose ALL that apply, note that incorrect selections will deduct points]
A) increased amounts of the p101 protein due to low levels of miR-5
B) increased amounts of the UCD protein due to high levels of miR-5
C) decreased amounts of the UCD protein due to low levels of miR-5
D) the absence of the UCD protein due to miR-5 inhibiting translation of the UCD mRNA transcript
E) the absence of the p101 protein due to miR-5 inhibiting transcription of the p101 mRNA transcript
Answer:
A) A) The gene encoding miR-5 is in a region of chromatin with hypoacetylation.
D) The gene encoding miR-5 in a region of heterochromatin.
B) D) the absence of the UCD protein due to miR-5 inhibiting translation of the UCD mRNA transcript
Explanation:
MicroRNAs (miRNAs) are small regulatory RNA sequences (approximately 20-24 nucleotides in length) that regulate gene expression by RNA interference (RNAi) mechanisms. These sequences (miRNAs) bind by base complementarity to messenger RNAs and thus inhibit protein translation and/or trigger mRNA degradation. In this case, miR-5 binds to the 3’UTR of the mRNA transcript of the UCD gene, thereby inhibiting/slowing protein UCD synthesis. The UCD protein is an allosteric regulator that binds and activates the expression of the p101 protein, thereby the miR-5 RNAi pathway also indirectly decreases the expression of the p101 gene. Moreover, hypoacetylation is an epigenetic mark generally associated with gene silencing (heterochromatin is a transcriptionally inactive state of chromatin).
1. Biochemical and differential tests can be incorporated into growth media or performed on isolated colonies after they have been cultured. Give three examples of a differential test that is incorporated into media and three examples that are applied after the colonies have been cultured.
Answer:
Biochemical and differential tests can be incorporated into growth. media or performed on isolated colonies after they have been cultured. ... Three examples of biochemical tests that are done on the colonies are catalase test, indole test, and urease test.
what are three characteristics of life that archaea bacteria have?
Answer:
The common characteristics of Archaebacteria known to date are these:
(1) the presence of characteristic tRNAs and ribosomal RNAs.
(2) the absence of peptidoglycan cell walls, with in many cases, replacement by a largely proteinaceous coat.
(3) the occurrence of ether linked lipids built from phytanyl chains.
Determine if the following statement is true or false, and why: We use plants in many facets of our society; they are used for medicine, building, food, and clothing.
Answer:
False
Explanation:
It is true that flowers are use in many facets but in this question it is asked that wheather it is used for medicine, building, food and clothing. Yes some flowers are used to make medicine but we can't use flowers to make building and we eat some flower but flowers are not used in clothing only paper or silk flowers is used to make and it is man-made flower...
I hope this is helps you....
Plants are very useful and plays a boon for our society as they are used for medicinal purpose, building, food as well as clothing.
Thus, given statement is true.
What is the use of plants?Plants plays a vital role in our life as they are required for basic human purposes.
Medicinal use of plants:
Medicinal plants such as aloe vera, tulsi, neem, turmeric and ginger helps to cure common viral infectionsSeveral medicinal plants are used in medicines that cures cough, and other chronic diseasesPlants as source of food:
Spinach, cabbage, lettuce are the plants used for eating purpose.
Plants support rainfall and helps to bind the soil that prevent soil erosion.
Plants also protect us from air pollution.
Therefore,plants are very useful and plays a boon for our society as they are used for medicinal purpose, building, food as well as clothing.
Thus, given statement is true.
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