Answer:
True
Explanation:
Cancer cells are abnormal cells that divide aggressively to form solid tumors, thereby differing from normal cells. Cancer cells do not need any stimulation to multiply them, i.e., they can synthesize their own growth factors that trigger uncontrolled cell proliferation. Mutations in genes associated with the progression through the cell cycle and programmed cell death (i.e., apoptosis) are a well-known hallmark of cancer cells. The mutated genes can be either 1-tumor suppressor genes that slow down cell division and repair DNA mistakes or 2-proto-oncogenes that normally help cells grow, and whose mutations cause normal cells to become cancerous (oncogenes are mutated forms of proto-oncogenes). Cancer cells are characterized by their invasiveness and metastatic potential, i.e., their ability to spread to healthy surrounding tissues through the lymph system and/or bloodstream, where these cells proliferate and produce new tumors. Finally, genomic instability, i.e., the increased susceptibility of cells to acquire and spread mutations at the genome level, is also a hallmark of cancer cells. Genomic instability results from damage to genes that regulate cell division and tumor suppressor genes.
In the electron transport chain
protons are pumped into the intermembrane space
water is split into oxygen and hydrogen
electrons combine with oxygen to form carbon dioxide,carbon dioxide
combines with water to form glucose
In the electron transport chain, protons are pumped into the intermembrane space.
Which of the following statements is correct with respect to the photosynthetic pathway of grass or a cactus?
Answer:
Where are statement
Explanation:
Please tell
an iron ball is heated from 50 degree celsius to 2000 degree celsius. what is the state of the iron ball at 2000 degree celsius
Answer:
It is in liquid state loosing it's magnetic property
Explanation:
Iron melts at 1538 °C after loosing it's magnetic property at 770 °C
If an iron ball is heated from 50 degree celsius to 2000 degree celsius. The state will be liquid state as it is loosing it's magnetic property
what is magnetic property of a matter ?The magnetism property is defined as the force exerted by magnets by either attracting or repulsing each other.
In a magnetic field of a matter, two important basic particles are the magnetic moments and the electric currents. It is depend on pressure, temperature, and the applied magnetic field.
Magnetic materials are up three types such as diamagnetic, paramagnetic and ferromagnetic.
Two Sources of magnetism are electric current and Spin magnetic moments of elementary particles.
The behavior of magnetic material is completely depend on its structure, electron configuration.
Learn more about magnetic property, here:
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Why would AZT be a poor candidate to inhibit SARS-CoV2?
Answer:
Due to its less effectiveness.
Explanation:
Azithromycin would be a poor candidate to inhibit SARS-CoV2 due to its less effectiveness. Azithromycin has no effect on the virus because this antibiotic can only attack on the structure of bacteria. Azithromycin is an antibiotic which is used for the treatment of a number of bacterial infections not viruses. They are not designed to destroy the structure of virus but for the bacteria.
a ___ is made up of nonliving pieces of DNA or RNA wrapped in a protein shell.
A pathogen is made up of nonliving pieces of DNA or RNA wrapped in a protein shell.
Answer:
Virut
Explanation
Nhìn chung các loại virus bao gồm các phần cấu tạo sau:
- Lớp vỏ protein
- Bên trong là nucleic acid (DNA hoặc RNA).
- Một số loại virus có màng bao
Give a positive and a negative impact of an environmental law or regulation.
Answer:
negative impact
Humans impact the physical environment in many ways: overpopulation, pollution, burning fossil fuels, and deforestation. Changes like these have triggered climate change, soil erosion, poor air quality, and undrinkable water. These negative impacts can affect human behavior and can prompt mass migrations or battles over clean water.
positive impact
Environmental regulations have greatly improved air and water quality, especially in areas that were dirtiest before regulation. Reducing airborne particulates is especially beneficial, saving thousands of lives and preventing millions of illnesses each year.
Explain how the structure of a red blood cell is related to its function
Answer:
It doesnot have a nucleus to increase the surface area
Explanation:
Red blood cells carry oxygen from our lungs to the rest of our bodies .Then they make the return trip, taking carbon dioxide back to our lungs to be exhaled.
Answer:
it has no nucleus which creates more room for the transport of oxygen,it also has a biconcave shape..they are flat and also flexible.
I hope this helps
A common genetic mutation that lowers levels of the enzyme cathepsin C severely reduces a person’s ability to ward off periodontitis, or gum disease. The enzyme triggers immunological reactions that destroy diseased cells and eliminate infections
in the mouth. But researchers are developing ways to restore the enzyme to normal levels. Once that happens, we will be able to eliminate periodontitis.
Which one of the following is an assumption on which the argument depends?
(A) Restoring cathepsin C to normal levels is the only way to eliminate periodontitis.
(B) Genetic mutation is the only cause of lowered levels of cathepsin C.
(C) Researchers will soon succeed in finding means of restoring cathepsin C to normal levels.
(D) Persons who do not have the genetic mutation that lowers levels of cathepsin C do not get gum disease.
(E) A person whose cathepsin C level has been restored to normal will not suffer from periodontitis.
Answer:
(E) A person whose cathepsin C level has been restored to normal will not suffer from periodontitis.
Explanation:
Considering the fact that there may be some other causes of periodontitis aside from the lowered levels of the enzyme.
Therefore, should there be some other causes of periodontitis, hence, it can be concluded the process of restoring the enzyme to normal levels might not be sufficient for eliminating periodontitis.
Hence, the author's argument is solely based on this assumption, and option. Hence, option (E) is the correct answer.
Earth's biosphere is described as?
8. How is penicillin used?
O to make cheese
O to kill protists that cause disease
O to kill bacteria that cause disease
O to make bread rise
Answer:
O to kill bacteria that cause disease
Explanation:
penicillins are a group of antibiotics used to treat a number of bacterial infections.
hope this helps!
define the term excretion.
state an excretory product that is passed out trough the lungs.
outline the role of the liver in excretion.
Answer:
Excretion is a process in which metabolic waste is eliminated from an organism. In vertebrates this is primarily carried out by the lungs, kidneys, and skin.
Carbon dioxide
The liver regulates most chemical levels in the blood and excretes a product called bile. This helps carry away waste products from the liver. All the blood leaving the stomach and intestines passes through the liver. The liver processes this blood and breaks down, balances, and creates the nutrients and also metabolizes drugs into forms that are easier to use for the rest of the body or that are nontoxic.
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Write atleast 2 functions of a frontal lobe.
describe the role of enzymes in seeds germination
Answer:
Enzymes such as amylase ,protease and lipase are liable for solubilizing spare food materials in form of starch, protein and lipids correspondingly
in seed and deliver energy and other fundamentals food materials to germinating embryo.
The seed proteins are catalyzed by protease enzyme and break it into amino acid and peptides that a e transferred to growing embryo.
The amino acids obtained from metabolism of the proteins are further used in biosynthesis of enzymes,hormones,proteins, pyrimidines and Purine bases.
The starch is catalyzed by enzyme amylase that provides the food materials for growth and development of embryo . Similarly lipase are enzymes that are responsible for metabolism of the triacylglycerols into glycerols and fatty acids.This is also the source of energy for growing embryo
How is  eukaryotic RNA processed before leaving the nucleus 
Answer:
Messenger RNA, or mRNA, leaves the nucleus through pores in the nuclear membrane. ... During mRNA processing, the introns (non-coding regions) of the pre-mRNA are removed, and the exons (the coding regions) are spliced together. Additionally, a 5' cap and a 3' poly A tail are added to the pre-mRNA
Explanation:
For the numbered steps below, select the option that places them in the correct order. 1) The ribosome binds to the mRNA and uses tRNAs to translate mRNA into the corresponding amino acid polypeptide sequence. 2) The spliceosome removes introns. 3) The primary structure of the polypeptide chain undergoes hierarchical foldings to form the tertiary structure. 4) RNA polymerase binds to the promoter region of a gene and initiates transcription.
Answer:
first 4, then 2, then 1, and lastly 3
Explanation:
First, RNA polymerase binds to the promoter region of a gene on the DNA and initiates transcription. Transcription is the process by which we get mRNA (coding RNA) which is used as a template for protein synthesis. Then, in transcription, the resulting mRNA undergoes modification and maturation. This involves removal of introns, addition of 3'-poly-A tail and 5'-cap. Introns are sequences that do not code for protein and are hence removed. The structure that removes introns is the spliceosome. Thirdly, mature mRNA travels to the cytoplasm. Ribosome (composed of rRNA) binds to mRNA and tRNA to start the process of protein synthesis. The process of formation of protein is called translation. Lastly, the primary structure of protein may undergo folding to form a tertiary structure.
What components does the chemical level include
Answer:
The chemical level of organization, scientists consider the simplest building blocks of matter: subatomic particles, atoms and molecules.
Explanation:
This is the correct answer I hope this helps you out!
1. alveoli, tiny air sacs within the lungs muscle below the lungs used for, 2. bronchi, breathing the two tubes into which the, 3. diaphragm, trachea divides before entering the lung
Answer:
1. Alveoli: tiny air sacs within the lungs.
2. Bronchi: the two tubes into which the trachea divides before entering the lung.
3. Diaphragm: a muscle below the lungs used for breathing.
Explanation:
Living system can be defined as the internal systems of organisms and how materials circulate within organisms.
Some examples of living systems in organisms are respiratory system, nervous system, digestive system, and circulatory system.
Additionally, living systems comprises of the following components; cells, organs, muscle, tissues, blood, etc., which are typically used for carrying out various bodily functions such as respiration, metabolism, digestion, etc.
In Human anatomy, cardiac cycle can be defined as a complete heartbeat of the human heart which comprises of sequential alternating contraction and relaxation of the atria and ventricles, therefore causing blood to flow unidirectionally (one direction) throughout the human body.
1. Alveoli: it comprises tiny air sacs and it's located within the lungs of living organisms.
2. Bronchi: these are the two (2) tubes into which the trachea divides (the right bronchus and the left bronchus) before entering the lung.
3. Diaphragm: it's a muscle located below the lungs and typically used for breathing in all living organisms.
It is believed that the ratio of cyclic electron transport to Z-scheme photosynthesis changes in response to metabolic demands. If a plant were actively engaged in a large amount of reductive biosynthesis, requiring NADPH, how would it alter these processes compared to a plant just performing the Calvin cycle to produce glucose
Answer:
The correct answer is (b) More Z-scheme photosynthesis, less cyclic photophosphorylation
Explanation:
Z-scheme is the schematic flow of the electrons from water to NADP+ and as it connects the two different photosystems that look like z in the diagram it is termed as Z-scheme of photosynthesis. The ratio of cyclic electron transport to Z-scheme photosynthesis alters as per the metabolic requirements. In the question, it is given that If a plant were actively engaged in a large amount of reductive biosynthesis, requiring NADPH, then it will acqiuire more z-scheme photosynthesis compared to a plant just performing the Calvin cycle to produce glucose.
Answer: More Z-scheme photosynthesis, less cyclic photophosphorylation
Quá trình phát sinh giao tử của một loài động vật lưỡng bội 2n ở giới cái một số tế bào sinh trứng có cặp nhiễm sắc thể số 2 không phân li trong giảm phân 1 ở giữa được giảm phân diễn ra bình thường sự kết hợp tự do giữa các loại giao tử có thể tạo ra các loại hợp tử có bộ nhiễm sắc thể như thế nào
Answer:
i cant understand
Explanation:
because your language in vietnamese
please if you want to asking, you need to talk in english, you understand?
Or you learn english, okay?
sorry
help needed asap please?
Answer:
I think A
Carbon is stored on our planet in the following major sinks (1) as organic molecules in living and dead organisms found in the biosphere; (2) as the gas carbon dioxide in the atmosphere; (3) as organic matter in soils etc
Annette has her thyroid gland removed because of a malignant tumor. She takes synthetic thyroid hormone to replace the thyroxine that her thyroid gland would have produced, but she is worried about her blood calcium level since she has lost her source of calcitonin. Does she need to worry about this problem
Answer:
She doesn't need to worry if her parathyroid glands are working.
Explanation:
Although Annette has to worry about the impacts of thyroid gland removal and synthetic thyroid hormone intake, the calcium levels in her body need not be a concern as long as her parathyroid glands are functioning normally.
This is because the parathyroid glands are responsible for regulating calcium levels in the blood, through the production of parathyroid hormones or parathormone.
You will create a molecular clock model for an arthropod gene. Follow these guidelines to make your model:
Your timeline will span from 90 million years ago to the present. The common ancestor in your model is an arthropod that lived 90 million years ago. The gene that you’ll track codes for a protein in the species’ venom.
The DNA sequence you’ll track contains 10 nitrogen bases. You can choose the order of the bases and where the mutations occur.
This gene mutates at a rate of approximately 0.76 base pairs every 17.1 million years. To build your model, calculate the estimated time period it takes for 1 base pair to mutate.
The first time period will only show the common ancestor. At the beginning of the second time period, three lineages will diverge from the common ancestor, each with a different mutation in their gene sequences.
The first and third descendant species will survive for the rest of the timeline. The second descendant species was extinct 50 million years ago.
Calculate how long it will take for one full base pair mutation to occur. Explain your reasoning by constructing a mathematical equation.
Answer:
The mutations occur at a rate of 0.56 base changes every 1 billion years. If this rate stays consistent, the mutation rate can be used to determine when different lineages of a particular species split
Answer:
It takes about 17.1 Million years for a base pair to mutate at a rate of 0.76 base pairs. To get the time it takes for one full mutation to occur, you must divide 17.1 to 0.76 and multiply it by 1. So, (17.1/0.76)×1=22.5. It would take about 22.5 million years for one full base pair mutation to occur. Having this being said, the first descendant with one base pair mutation would change after 22.5 million years from the common ancestor. For the second descendant, it would take 45 million years as 22.5 time 2 is 45. 5 million years later, the second descendant will become extinct while the first descendant survives. The third descendant will take about 22.5×3= 67.5 million years. Now, the first and third descendants will survive while the second descendant is extinct.
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WHAT IS PHOTOSYNTHESIS ??
[tex] \huge \boxed{\mathfrak{Question} \downarrow}[/tex]
What's photosynthesis?[tex] \large \boxed{\mathfrak{Answer \: with \: Explanation} \downarrow}[/tex]
Photosynthesis is the process in which green plants derive their food (nutrients and water) through the capturing of light energy (sunlight) and using it to convert carbon dioxide (CO2) and water (H2O) into oxygen (O2) and other substances (compounds) that are rich in energy. Chlorophyll a green pigment present in plants is used in this process.
__________________
Formula ⟶ [tex]\boxed{\bf\:6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 6O_2} [/tex]
__________________
So, the products of photosynthesis are [tex]\large\boxed{\boxed{\bf\:C_6H_{12}O_6 + 6O_2}}[/tex]
Identify the four key concepts of Darwin's theory of natural selection. (2 marks)
Explain how Lamarck's theory was different and why it got rejected over time. (2 marks)
Can someone please help me with this biology question?
Answer:
I think it's C. The female parent hemophiliac..eta
but I would wait for a second opinion
What is the function of the enzyme RNA polymerase during transcription?
aids in packaging amino acids for use at a later time
aids in destroying the mRNA sequence that was read
helps speed up the process of transcription
helps slow down the process of transcription
Answer:
RNA polymerase is an enzyme that is responsible for copying a DNA sequence into an RNA sequence, duyring the process of transcription.
The introduction of some nonnative species has been helpful. How can initially useful organisms become harmful to an ecosystem?
Answer:
See explanation
Explanation:
The introduction of nonnative species in an ecosystem maybe both helpful and harmful. Initially, the introduced nonnative species maybe prove helpful in some ways.
As time goes on, the nonnative species begin to compete with the native species for resources in the ecosystem. The nonnative species may outdo the native species in such competition and entirely replace them. This may ultimately lead to a permanent loss of the native species from the ecosystem.
Define the word ⇒ Biosphere
THANK YOU!! :)
The biosphere is a narrow zone of the earth where land, water, air interact with each other to support life.
Answered by Gauthmath must click thanks and mark brainliest
Questions for Activity 3: Making Molecular Models of Aerobic and Anaerobic Respiration
Text BoxDraw what you think the models of aerobic and anaerobic respiration would look like if you constructed them using models like in figures 3-6
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Irineu vc não sabe nem eu
sksosmmsos!s s s s s. s sim cofmc. kc c. ocmc c. ximc.
heheheheheheheheheheeheheheeheh
sou toxic
toma trou xa deu mtos pontos atoa kakakakakaja
Can you guys help me please ?
Answer:
a
Explanation:
