Which molecular formula corresponds to this model of a chemical compound? (black = carbon; red = oxygen; white =hydrogen)
Cz(OH)4
C2H204
C₂H4O2
C4H₂O2
You are doing an experiment and plated E. coliin different medias. Media A has onlyglucose, B has only lactose, and media C has both glucose and lactose.You notice that some of the cultures grown in media C are metabolizinglactose. Which type(s) of mutation(s) could cause this to occur
Answer:
A. Glucose:
As lactose is absent will follow the glucose metabolism, so the lac repressor will hold tightly with the operator which leads to the prevention of transcription as RNA polymerase can not bind to promoter so no lactose metabolism.
B. lactose:
In the case or wild mutant lactose metabolism will occur as lactose is present, allolactose binds to the lac repressor thus the operator and promoter are free so transcription starts. The same result will be in all test except in the case of a mutant repressor.
C. glucose and lactose:
In this case, diauxic growth will occur. This growth takes place when two sugars are present in the media. The preferred sugar will be consumed first That is glucose. Then a lag phase will come which will be followed by the second sugar metabolism that is lactose. the given two cases :
Lactose will be metabolized first, as operator site mutation prevents repressor protein binding and thus will lead to the constitutive synthesis of lac operon in test B. The same thing will happen, as in this case also, constitutive synthesis of lac operon will happen in test C.
Cultures grown in the presence of both glucose and lactose are metabolizing lactose. In the test (b) and (c) will be responsible due to constitutive synthesis of lac operon will happen.
Which of the following is made of microcrystalline quartz? Group of answer choices A.dolostone B.gypsum C.chert D.coquina
select all that apply natural selection
1. is random
2. favors organisms well adapted to the environment
3.cannot work if beneficial traits are not hereditary
4. is often called survival of the fittest
Answer:
the answer is 2. favors organisms well adapted to the environment
How are mitosis and meiosis similar?
A. In both processes, chromosomes are copied.
B. Both processes produce four diploid cells.
C. Both processes produce four haploid cells.
processes
D. In both processes, tetrads are formed.
Answer:d
Explanation:because it is
Why do rocks on the ocean floor form a pattern of magnetized stripes?
Answer: D trust me on this
Explanation:
the rocks contain iron that points in different directions depending on earths polarity
The polarity of Earth affects the iron in the rocks, which points in various ways, so rocks on the ocean floor form a pattern of magnetized stripes.
How form a pattern of magnetized stripes?The idea of paleomagnetism, according to which the arrangement of the earth's tectonic plates depends on the iron present in magma, is one of the theories explaining seafloor spreading. The positive and negatively charged ions are represented by the stripes.
The magnetic strips, also known as magnetic anomalies, are identified by white and black strip patterns. They have ions that are positively and negatively charged. As a result, the magma magnetizes with the Earth's magnetic field when it emerges from the ridges.
Therefore, the polarity of Earth affects the iron in the rocks, which points in various ways.
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4. Compare and contrast aerobic cellular respiration and anaerobic cellular respiration: what are the steps of each and how much ATP is made in each step? What energy/electron carriers are made in each step, and how many? What types of organisms are used to make alcohol and yogurt, and what type of respiration is yogurt and alcohol making?
Answer:
Explanation below
Explanation
It should be understood that respiration is the process whereby organisms exchange gases with their environments.
And the two types are aerobic and anaerobic respiration.
Aerobic respiration is the type of respiration that occurs in the presence of oxygen, while the anaerobic respiration is the type of respiration that occurs in the absence of oxygen.
The examples of organisms that are used in making alcohol and yoghurt are Sacharomyces cerevisae, which is yeast, and Lactobacilli spp respectively.
Albino is a rare recessive genetic disease. Sally and her parents are normal but her sister is albino. It seems that Sally has chance to carry the albino allele. If she marries a normal person with no family history of albinos, what is the chance for Sally's first baby to be a carrier of the recessive allele?
Answer:
2/3 ×2/3× 1/4
Explanation:
Albino is a rare recessive genetic disorder which is characterized by low production of melanin or no melanin production. It is an inheritable disorder can be pass from generation to generation. Since the parent of Sally has no Albino and Sally sisters has, it means there is an history of Albino in the family that make her sister to have. She has 2/ 3 chance of having and the possibility that her first child will have is 1/4 meaning 25% because her hubby has no Albino history in their family.
The transport of water from the roots to the leaves of a green plant against the force of gravity is facilitated by
a. adhesion
b. cohesion
c . surface tension
d . capillary action
Which process is the First step of protein synthesis
Answer:
transcription
Explanation:
transcription of DNA by tRNA is the first step of protein synthesis
Answer:
Transcription.
Explanation:
Why is carbon the element of life?
Answer:
the ability to form stable bonds
In the human nervous system, the brain is an example of what level of organization? a. cell b. tissue c. organ system d. organ
Answer:
d. organ
HOPE it helps!!!Answer:
The answer is the organ
Explanation:
Which of these molecules does not enter the cellular respiration
pathway?
O glycerol
O fatty acids
amino acids
O glucose
O all of these
Answer:
fatty acid
Explanation:
it has double bonding of carboxylic acid
Multiple alleles____ can interact how with traits
What other characteristics can you think of that make an organism a good disperser?
Answer:
Explanation:
For organism to be described as a good disperser, it must possess some characteristics which includes:
Rapid growth with a short life span and early maturity
They must also have many small offsprings and with little parental care or protection
They are easily adapted to unstable environments and can be "pioneer" species.
They often undergo self fertilization and have large seeds etc
TP53 is a recessive gene and is not located on the X chromosome, why would people who inherit just one mutant copy of a recessive tumor-suppressor gene be at higher risk of developing cancer than those without the recessive gene?
Answer:
Explanation:
Since it is a recessive gene, tumor suppressor genes required the inactivation of both alleles, this is usually accomplished by the mutation of one allele and a targeted homozygous deletion of the second allele. This leads to an effective inactivation of the suppressor genes with the mutations acting a a dominant negatives. This way, patients are put at a higher risk of developing cancer
In experiment #2 you are asked to use the scientific method to develop and execute a method of separating a mixture of sand, salt and iron pellets. Imagine you are in a lab and notice that a plate of bacteria grow faster in the presence of sunlight. After that single observation, you come to the conclusion that sunlight causes bacteria to grow fast. What would be the next step in the scientific method for this experiment?
Answer:
1. separation can be done with help of magnetic bar and filtration.
2. the next step will be testing the hypothesis.
Explanation:
1. Separation of iron pellets from sand, and salt first
Use a magnet
Due to magnetic force iron pallets will attach with it and separation will occur from sand and salt.
After separation of iron pallets, add water to mixture of sand and salt and heat until salt get dissolved then filter the salt water.
This will help in separating all three components of mixture to separate.
2. Bacteria growth
Hypothesis must be tested-
In this case a hypothesis and conclusion is represented. Conclusion is provided that in presence of sunlight growth of bacteria is faster. So the hypothesis must be verified by scientific experiment to be a valid theory by measuring or monitoring growth in presence of sunlight.
Describe the type of attitude that would help of attitude that would help to make a good scientist?
Answer:
My answer to you is that the positive willing to do tests and experiments over and being okay with being wrong if you are.
Choose the true statement. Receptor tyrosine kinases undergo autophosphorylation. G proteins phosphorylate receptor tyrosine kinases. Receptor tyrosine kinases include seven transmembrane segments. Active receptor tyrosine kinases are monomeric proteins.
Answer:
Receptor tyrosine kinases undergo autophosphorylation.
Explanation:
The receptor tyrosine kinases (RTKs) are proteins that undergo dimerization and autophosphorylation after binding with their corresponding ligands, thereby triggering downstream molecular signaling cascades. The RTKs bind with high specificity to ligands including growth factors, hormones and cytokines. In human cells, there are 58 types of RTKs proteins that function to regulate developmental pathways, and their dysfunctions have been associated with cancer progression.
The instructions for making proteins are coded in the (cytoplasm / DNA / endoplasmic reticulum / nucleus) of a cell. In a eukaryotic cell, these instructions are located in the (cytoplasm / DNA / endoplasmic reticulum / nucleus).
Answer:
The instructions for making proteins are coded in the (cytoplasm / DNA / endoplasmic reticulum / nucleus) of a cell. In a eukaryotic cell, these instructions are located in the (cytoplasm / DNA / endoplasmic reticulum / nucleus).
Explanation:
The genetic code is contained in DNA, or deoxyribonucleic acid. This is usually the same among most organisms, save some RNA viruses. But in eukaryotes, the DNA is in the nucleus, whereas in prokaryotes the DNA is in the "nucleoid region", or a twisted up section near the middle of the cell.
The instructions for making proteins are coded in the DNA of a cell. In a eukaryotic cell, these instructions are located in the nucleus.
What is DNA?Deoxyribonucleic acid is a polymer made up of two polynucleotide chains that coil around each other to form a double helix that contains genetic instructions for the development, functioning, growth.
it is also involved in reproduction of all known organisms and viruses. Nucleic acids include DNA and ribonucleic acid.
The information molecule is DNA. It stores instructions for the production of larger molecules known as proteins.
These instructions are stored in the nucleus of each of your cells and are distributed across 46 long structures known as chromosomes.
These chromosomes are composed of thousands of shorter DNA segments known as genes.
DNA is a linear molecule made up of four different types of smaller chemical molecules known as nitrogenous bases.
Thus, DNA is involved in coding protein and is usually located in nucleus.
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the brain is located in the ______ cavity?
Answer:
cranial Cavity
Explanation:
The brain occupies the cranial cavity, which is lined by the meninges and which contains cerebrovascular fluid to cushion blows.
The number of rhinoceroses has decreased to near extinction. How are rhinoceroses classified under the Endangered Species Act?
Answer:
Rhinos are A endangered
Different protists use cilia, _______, or pseudopodia to move.
Answer:
Different protists use cilia, flagella , or pseudopodia to move.
What happens to the food in small intestine?
Answer:
the nutrients in the food is absorbed
Answer:
ExplanatBlood in the villi helps to absorb nutrients and sugar molecules.
Nutrients from food are absorbed.
Fat is broken down into smaller droplets.
Most of the digestion that occurs in the small intestines occurs in the duodenum, which is the first part of the small intestines. This is where fats are broken down into smaller droplets by emulsifiers and lipases. Absorption takes place in the other parts through the villi.ion:
negatives about gypsy moths?
Answer:
Gypsy moths do not kill trees directly they defoliate them. Severe defoliation can add to other stresses such as weather extremes or human activities. This cumulative stress can leave trees vulnerable to disease or other pest infestation that can cause death.
Explanation:
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Answer:
The rise of the gypsy moth population will eventually kill many trees, as they won’t be able to perform photosynthesis. This event will negatively affect the lumber and construction industries, as well as the beauty of public and private landscapes.
Explanation:
PLATO
g One can measure ATP production from isolated mitochondria in vitro (in a test tube). Changing the pH of the solution that the mitochondria are in results in a similar change the pH of the intemembrane space. If the pH of the solution that the isolated mitochondria are in is raised and everything else remains constant, what is the effect on ATP synthesis
Answer:
This will lead to an decreases in the ATPs synthesis. This is because low pH , high acidity favours ATP synthesis, because it increases the proton concentration for electrochemical gradients needed for energy that ATPase enzymes makes used of synthesis of ATPs.
Therefore a rise in the pH(low acidity) lowers protons levels, and therefore reduced electrochemical gradients , with a drop in energy for ATPs synthesis.
Explanation:
In a particular species of tomato plant, the plants can bear fruits of different colors. Suppose a researcher crosses a homozygous plant that bears white fruit with a different stock of homozygous plant that also bears white fruit. In the F1 generation, all of the fruits are red. Two F1 plants are then crossed and the F2 progeny are examined. The F2 generation contains 219 plants with red fruit and 173 with white fruit.
Required:
a. What are the genotypes of the F2 progeny?
b. What type of epistasis, if any, is present?
1. dominant epistasis
2. duplicate recessive epistasis
3. duplicate dominant epistasis
4. no epistasis
5. recessive epistasis
Answer:
The genotypes of the F2 progeny are 9/16 A-B-, 3/16 A-bb, 3/16 aaB- and 1/16 aabb.The occurring interaction is duplicate recessive epistasis.Explanation:
Gene interactions happen between genes at different levels and have implications in the phenotypic expression, causing a wide genetic variability.
Epistasis means "interruption" and refers to interactions between genes located in different loci in the same chromosome. An “epistatic gene” can alter, influence, or suppress the expression of a "hypostatic gene". When the epistatic gene is recessive, the interaction is known as "recessive epistasis". In duplicate recessive epistasis, two genes are involved in the same metabolic path. Two recessive alleles in any of the two loci can suppress or inhibit the phenotype, in this example, tomato color.
Tomatoes that express the absence of color in the fruit have the following genotypes: aa B_, A_bb y aabb. Tomatoes with these genotypes are white, while tomatoes with A_B_ genotypes are red.
Cross 1:
Parental) aaBB x AAbb
Gametes) aB aB Ab Ab
Punnet Square) aB aB
Ab AaBb AaBb
Ab AaBb AaBb
F1) 100% AaBb, red tomatoes
Cross 2:
Parental) AaBb x AaBb
Gametes) AB Ab aB ab
AB Ab aB ab
Punnet Square) AB Ab aB ab
AB AABB AABb AaBB AaBb
Ab AABb AAbb AaBb Aabb
aB AaBB Aabb aaBB aaBb
ab AaBb Aabb aaBb aabb
F2) 9/16 A-B-
3/16 A-bb
3/16 aaB-
1/16 aabb
Genotypes A-bb, aaB- and aabb express white or absence of color.
Genotypes A-B- express red color.
We know that in the F2 generation there are 219 plants with red fruit and 173 with white fruit.
The total number of plants is 392 (219 + 173), which is 100% of the F2 generation. So:
392 plants ----------- 100% F2 ---- 16
219 red plants--------56% F2------- 9
173 white plants------44% F2 ------ 7
There is a proportion of 9:7 because of the interaction between the two genes.
Swamps can occur seasonally.
Answer:
If you are asking a true or false this is sometimes true with small swamps
Explanation:
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Answer:Esta cobertura comprende las tierras bajas, que generalmente permanecen inundadas durante la mayor parte del año, pueden estar constituidas por zonas de divagación de cursos de agua, llanuras de inundación, antiguas vegas de divagación y depresiones naturales donde la capa freática aflora de manera permanente o estacional. Comprenden hondonadas donde se recogen y naturalmente se detienen las aguas, con fondos más o menos cenagosos. Dentro de los pantanos se pueden encontrar cuerpos de agua, algunos con cobertura parcial de vegetación acuática, con tamaño menor a 25 ha, y que en total representan menos del 30% del área total del pantano.
Distribución geográfica: Las zonas pantanosas se identificaron en las llanuras de inundación a lo largo de los ríos Caquetá, Caguán y Orteguaza y sus tributarios en el departamento del Caquetá; a lo largo del Río Guaviare en el norte de la región amazónica y en el río Vaupés en los departamentos de Guaviare y Vaupés.
Explanation:
A 45 year old man had coronary artery stents placed 2 days ago. Today, he is in severe distress and reporting crushing chest discomfort.
Answer:
idk man
Explanation:
Regulation of expression of genes is important because: Group of answer choices A. some genes function in opposition to other genes. B. it is energetically wasteful to produce all possible genes. C. multicellular bacteria need specialized cell types. A and B. All of the above
Answer:
All of the above.
Explanation:
Regulation of the expression of genes refers to different processes tge cells use to increase or decrease the production of some gene content. It involve Turing gene on and off so as to ensure that appropriate genes are expressed at the right times. This allow organism to respond to changes in their environment.