Normal cells die in a nutrient medium containing thymidine and methotrexate, whereas mutant cells defective in thymidylate synthase survive and grow. The mutant cells grow because the medium contains the___________ they are unable to make normal cells, however, continue to synthesize their own and thereby convert their limited supply of to________ . The methotrexate inhibits , so cannot be regenerated. Without a supply of___________ for the synthesis of nucleotides and amino acids, the cells die.
Answer:
*Thymidine
*THF to DHF
*THF
Explanation:
Normal cells die in a nutrient medium containing thymidine and methotrexate, whereas mutant cells defective in thymidylate synthase survive and grow. The mutant cells grow because the medium contains the_____Thymidine______ they are unable to make normal cells, however, continue to synthesize their own and thereby convert their limited supply of to__THF to DHF______ . The methotrexate inhibits , so cannot be regenerated. Without a supply of______THF_____ for the synthesis of nucleotides and amino acids, the cells die.
NOTE:
THF means Tetrahydrofolate
DHF means Dihydrofolate
Thymidine which is also reffered to as deoxythymidine, is described as a deoxynucleoside that is composed of the pyrimidine base thymine that is attached to the sugar deoxyribose. Thymidine is a nucleoside made up of pentose sugar, pyrimidine base tymine and deoxyribose, it is one of the the four nucleoside found in exclusively DNA as well as T-loop of tRNA.
Tetrahydrofolate also known as tetrahydrofolic acid can be described as part of folic acid that function as a coenzyme which aid metabolic reactions that includes nucleic acid and amino acids. It is also reffered to as one-carbon metabolism, and it's oone-carbon mechanism is associated to the histidine, serine of amino acid.
The image shows the femur bone of the leg and part of skull . Identify the various bone markings in the image
Answer: A fossa is a shadow depression in the bones of the skull. A firearm is a hole in a bone. In the image of the skull, the hole at the base is the opening through which the spinal cord passes. A tubercle is a small nodualr projection, which is visible in the image of the femur bone of the leg.
Explanation: Edmentum
Will change in ocean salinity cause a change in climate overall? Why or why not?
Answer:
Yes
Explanation:
Ocean play very important role in climate change. Change in the salinity of ocean definitely going to affect climate because changes in salinity have effect on water density.
Change in density allows changes in the movement of seawater and shift in climate pattern. if salinity will increase, water will become heavier and sink deep in ocean, which joins the currents that circulate all over the world. These currents affects the transport of heat and affect the rainfall pattern, example of such currents is gulf stream.
So, stable salt densities or salinity in the oceans keep the earth’s climate in balance.
Question 2 (1 point)
The main goal of conservation biology is to
Answer:
(1) to investigate and describe the diversity of the living world; (2) to understand the effects of human activities on species, communities, and ecosystems ; and (3) to develop practical interdisciplinary approaches to protecting and restoring biological diversity.
Explanation:
To protect species from extinction, preserve their habitats and protect bio diversity.
How did Scientist find the human gene that makes insulin
Answer:
Recombinant DNA is a technology scientists developed that made it possible to insert a human gene into the genetic material of a common bacterium. This “recombinant” micro-organism could now produce the protein encoded by the human gene. Scientists build the human insulin gene in the laboratory.
Explanation:
Which phrases accurately describe this rock? Check all that apply.
1.formed underground
2.randomly arranged grains
3.formed through sedimentation
4.formed by extreme heat and pressure
5.layers that tend to split apart along bands
Explanation:
4. formed by extreme heat and pressure
1. formed underground
Answer: Formed underground
Formed by extreme heat and pressure
Explanation:
The ______________ system consists of the hypothalamus, pituitary, amygdala and hippocampus. They are located in the brain just under the cerebrum.
A) endocrine
B) limbic
C) nervous
D) skeletal
Answer:
The answer is B or limbic.
Explanation:
"The amygdala is the emotion center of the brain, while the hippocampus plays an essential role in the formation of new memories about past experiences."
Answer: LIMBIC
Explanation: I JUST DID IT.
What is the runoff pollution, and what causes it?
Answer:
Polluted agricultural runoff is a major source of water pollution globally. Agricultural runoff is primarily caused by melted snow or rainfall. It is, in essence, water that does not stay in the soil but instead flows on the surface and carries a variety of polluting elements.
Explanation:
The lovely people at google
What is the purpose of the cell cycle?
Answer:
The most basic function of the cell cycle is to duplicate accurately the vast amount of DNA in the chromosomes and then segregate the copies precisely into two genetically identical daughter cells. These processes define the two major phases of the cell cycle.
Explanation:
2. Name the vessels that arise from the aortic arch
Answer:
Three vessels come out of the aortic arch: the brachiocephalic artery, the left common carotid artery, and the left subclavian artery.
Explanation:
Hope this helps! <3
What type of asteroid/meteorite do they believe brought some water to the Earth?
a. Stoney Iron
b. Iron
c. Steel
d. Carbonaceous Chondrite
7. Compare and contrast the roles and structures of DNA
and RNA
Answer: dna and rna have four nitrogenous three of which they share Cytosine, Adenine, and Guanine the differs between the rna has Uracil and the dna has thymine but dna is doubled stranded and rna is single stranded
Thymine
Explanation:
What is the process responsible for gamete formation?
Answer: Formation of Gametes
Both the male and female gametes are formed during a process of cellular reproduction called meiosis. During meiosis, the DNA is only replicated or copied one time. However, the cells are divided into four separate cells.
Explanation:
Which resource is a non-renewable resources? A.fresh water B.Maple trees C.Solar Energy B.Precious metal
Answer:
Precious Metal, bc nature will not renew it and there's just a limited amount on any given planet.
Technically true for the sum of all water on the planet too, but fresh water gets renewed by cyclical processes in nature.
and solar energy (and trees for that matter) are also just renewed from our earthly perspective of space and time. stars do nuclear fusion, and this is a one-way process, single use basically.
so nothing is truly renewable, but we can't use up some things and get new supply for any given time, at least in time spans we can grasp.
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Answer:
B
Explanation:
When you smile, you have dimples is this a gen or a jene
Answer:
It's a gen.
Explanation:
Yersinia pestis, the organism that causes the bubonic plague, led to the deaths of approximately 75 million people is the 1300's. This was known as the Black Death. Which type of organism caused the bubonic plague?
Answer:
Yersinia pests
Explanation:
it is a bacterium. its vectors is infected flea from an animal. The plague can also results from contact with contaminated fluid from dead infected animal from bubonic plague.
when the flea bites, the bacterium enters the blood stream and through the lymphatic systems it finds it way into the lymph nodes of the armpit and pubic region.
it localized in the nodes leading to swelling, enlarged nodes-buboe, with painful sensation.
chills, high fever, seizures, are some of the symptoms.
proper hygiene is the best preventive methods.
Incineration is a way to control pollution. which is an example of an incinerator
Answer: For example, hospitals and research facilities generally use incinerators to dispose of biological tissues, blood-contaminated materials, and other medical wastes such as disposable hypodermic needles and tubing.
Explanation:
Answer:
afterbuner
Explanation:
The carbon cycle is closely related to which of the following?
nitrogen cycle
movement of oxygen
rock cycle
water cycle
Answer:
Actually, the correct answer is B. movement of oxygen.
Explanation:
Calculate pH a decrease of one unit on the pH scale means a solution is ten times more acidic. a decrease of two units means the solution is 100 times more acidic. how much more acidic is acid precipitation( pH = 4.0) than pure water (PH= 7.0 )
Answer:
Each unit of decrease has an exponential increase. So if you are looking at an item that has a Ph of 4 and water has a Ph of 7 —-that means it is 10 to the 3rd power more acidic or 1000 times more acidic than water.
Explanation:
A decrease of one unit on the pH scale means a solution is ten times more acidic; a decrease of two units means the solution is 100 times more acidic; so pH 4 means the solution is thousands of times more acidic than normal water.
What is the effect of pH on the cell?The pH scale shows the pH from 1 to 14, where pH 7 is taken as neutral, below which the solution is more acidic, and above which the solution is more basic. The pH has an important role in the organism as it regulates the blood and maintains enzymatic function.
Hence, a decrease of one unit on the pH scale means a solution is ten times more acidic; a decrease of two units means the solution is 100 times more acidic; so pH 4 means the solution is thousands of times more acidic than normal water.
Learn more about the pH here.
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Which of the following are examples of an inherited trait for plants? (Check ALL correct answer.)
a) The type of fruit it makes
b) How tall it grows
c) If it receives enough rain
d) The color of its flowers
Answer:
A,b,d
Explanation: These are traits
Which factors of earth postion would contribute to long term climate change?
Answer:
Strength of the sun. ...
Changes in the Earth's orbit. ...
Changes in the orientation of the Earth's axis of rotation. ...
Quantity of greenhouse gases in the atmosphere. ...
Carbon dioxide content of the oceans.
Explanation:
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What part of the fungus is seen in the woods or on the lawn? Please help I will mark you the branniest!
Damp conditions can bring out other types of fungi that can create more serious problems for your lawn. Brown patch, fusarium blight, and rust are a few of the diseases that thrive in wet grass.
Polypores are also called bracket fungi, and their woody fruiting bodies are called conks. Most polypores inhabit tree trunks or branches consuming the wood, but some soil-inhabiting species form mycorrhiza with trees. Polypores and their relatives corticioid fungi are the most important agents of wood decay.
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Answer:
i think its C.population density
Explanation:
biomass shows how much biomass (the amount of living or organic matter present in an organism) is present in the organisms
Answer:
A biomass pyramid shows the population density at each trophic level
Decomposers act in which level of the trophies pyramid?
Answer:
Decomposeds act on the last trophie level.
Explanation:
A separate trophic level, the decomposers or transformers, consists of organisms such as bacteria and fungi that break down dead organisms and waste materials into nutrients usable by the producers.
Choose the true statements about amyloid fibrils. 3 options are correct:a) An amyloid fibril typically forms from aggregates of misfolded peptides resulting from frameshift mutations. b) An amyloid fibril is stabilized by hydrophobic interactions between aromatic residues. c) Soluble proteins that misfold and form amyloid fibrils become insoluble. d) Because most newly synthesized proteins fold correctly, the accumulation of misfolded proteins (or fragments) tends to occur slowly, thus explaining the slow onset of disease. e) Proteins that convert to an amyloid fibril structure tend to have low solubility in their native form.
Answer:
The correct answers are: b) "An amyloid fibril is stabilized by hydrophobic interactions between aromatic residues", c) "Soluble proteins that misfold and form amyloid fibrils become insoluble", and d) "Because most newly synthesized proteins fold correctly, the accumulation of misfolded proteins (or fragments) tends to occur slowly, thus explaining the slow onset of disease".
Explanation:
Amyloid fibrils are protein aggregates that can cause pathological conditions, for instance, they are found in brain tissue in people with Alzheimer disease. This disease, and other relates diseases, have a slow onset because most newly synthesized proteins fold correctly and the protein aggregates are made up misfolded proteins. This newly synthesized proteins are soluble, but once the proteins are misfolded, they form amyloid fibrils that are insoluble. The amyloid fibrils are stabilized by hydrophobic interactions between aromatic residues, which are formed within the complex of insoluble misfolded proteins.
state what scientists might do to successfully combat bacteria that are resistant to vancomycin
Answer:
Probably make a new medicine.
which statement best explains the difference the difference in growth among the plants
Answer:
Where are the statements
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The apple tree receives 1000kJ of light from the Sun, but only uses 500kJ. Of this, only 250kJ are stored in the tree to be transferred through the food chain.
a)Calculate the efficiency of the tree (2)
b)State the ways in which the remaining energy has been transferred out the of the food chain (3)
a) [tex]\frac{250}{1000}[/tex] × [tex]100[/tex] [tex]= 25[/tex]%
b) Respiration, decomposition
Which of these are included in the immune response? Select 3 correct answers. T-cells lymphocytes B-cells stem cells oil
Answer:
A, B, C
Explanation: