Cancer is due to irregularities in cell division that are caused by mutations in cancerous cells. These mutations inhibit apoptosis and favor cell division. Among the options, the correct ones are 1, 2, 4, and 5.
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Cancer is the result of irregular cell division.
Its development and progression are closely related to changes in the cell cycle regulator factors.
Cancerous cells
• Divide when they should not do it ⇒ overactivity of the positive cell division regulators.
• Do not stop dividing when they should ⇒ reduction in the activity of cell division inhibitors
• Do not die when they should ⇒ loss of the apoptotic capability
• Leave the area where they are growing ad travel to other parts of the body ⇒ metastasis
Normal cells divide and die during a programmed period.
When a normal cell mutates or suffers from any alterations that can not be repaired, it automatically activates its apoptotic process.
However, cancerous cells lose the capability of dying and their reproductive inhibition, so they keep growing and dividing with no limits.
The unlimited division occurs because mutations in cancerous cells influence the cell cycle by favoring proliferation and inhibiting senescence and apoptosis.
These cells do not depend on external growth factors or other protein signals to divide.
Cancerous cells can release their own growth factor and even influence neighbor cells to produce and release these substances.
Cell division is constant even when there is no space.
Sometimes over multiplication creates tumors that might affect healthy neighbor cells and the tissue itself.
Among the options,
1) Such cells are not inhibited by density. CORRECT
2) Such cells can divide in the absence of growth factors. CORRECT
3) Such cells skip the G1 phase of the cell cycle. INCORRECT
4) Such cells do not require anchorage to a surface in order to divide. CORRECT
5) Such cells do not respond to signals that normally trigger apoptosis. CORRECT
6) Such cells do not need enzymes for DNA replication. INCORRECT
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Cancer cells can divide in the absence of growth factors. Cancer cells do not require anchorage to a surface in order to divide. Cancer cells do not respond to signals that normally trigger apoptosis.
Cancer cells can multiply without any growth factors whereas normal cells will not divide without the addition of growth factors. Cancer and tumor cells are less dependent on anchorage. They are free to proliferate, and invade tissues. A normal cell that have damaged DNA will undergo apoptosis while on the other hand, cancer cell with unfixable DNA will not undergo apoptosis and will continue multiplication.
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Labeling the Water Cycle
Tyt
Place each step of the water
cycle in its correct location.
Evaporation
Precipitation
Condensation
Groundwater
Transpiration
Runon +
Check
Intro
Answer:
what you have is correct
Answer: the image above is correct :))
Explanation:
because
KUES Questions
8. A water wave has a frequency of 2 Hz and a wavelength of
5 m. How fast does it travel through the water?
Answer:
10m/s
Explanation:
Given parameters:
Frequency of wave = 2Hz
Wavelength = 5m
Unknown:
Speed of the wave = ?
Solution:
The speed of a wave is derived from the product of wavelength and frequency;
speed = frequency x wavelength
Insert the parameters and solve;
speed =2 x 5 = 10m/s
ILL GIVE BRAINLY PLZ HELP Fisherman at Reelfoot Lake, in Northwest Tennessee, noted a drop in the number of catfish. What is the most reasonable conclusion, based on the data provided?
A) The pH of the rain will not affect the fish that live in the lake.
B) The pH of the rain falling into the lake is of level that it is killing the adult fish.
C) The pH of the rain falling into the lake is of level that it is affecting fish reproduction.
D) The pH of the rain falling into the lake is of level that it is both affecting fish reproduction and killing adult fish.
Answer:
D, if you look at the acid rain it covers both death of fish and reproduction
How does deforestation affect coral reefs?
Answer: When the forest cover is lost, soil washes away into rivers that flow into the oceans and, they believe, onto coral reefs. That runoff adds nutrients to the ocean water.
Explanation: Basically, when this occurs, the roots are no longer attached to the soil, letting all the nutrients get ruined in the ocean water instead of feeding plants/animals/trees.
Help!! Why do geologists radioactive/carbon dating determine absolute age? (i need this quickly!)
Absolute dating methods determine how much time has passed since rocks formed by measuring the radioactive decay of isotopes or the effects of radiation on the crystal structure of minerals. Paleomagnetism measures the ancient orientation of the Earth's magnetic field to help determine the age of rocks.
Which of the following is NOT a necessary input for the process of cellular respiration? 1. CO2 (carbon dioxide) 2. Glucose 3. Sugar 4. O2 (oxygen)
Answer:
CO2
Explanation:
Hope this helps :)
CO2 (carbon dioxide) is NOT a necessary input for the process of cellular respiration.
What is cellular respiration ?
A series of chemical reactions known as cellular respiration break down glucose into ATP, which can be used as energy to power numerous body processes. Cellular respiration has three main stages: the citric acid cycle, glycolysis, and oxidative phosphorylation. The citric acid cycle takes place in the mitochondrial matrix, glycolysis takes place in the cytosol, and oxidative phosphorylation takes place on the inner mitochondrial membrane. Glucose, ATP, and NAD+ are the cellular respiration starting reactants, the rate-determining enzymes for cellular respiration are phosphofructokinase-1, pyruvate dehydrogenase, and isocitrate dehydrogenase, and the final products include ATP and water. One or more enzymes involved in cellular respiration, like succinyl-CoA-synthase or pyruvate kinase, are typically disrupted by diseases that affect this process.Glycolysis is the only process that can take place without oxygen, and only two ATP molecules can be produced for each glucose molecule. ATP and H2O are the two final end products of cellular respiration. Glycolysis produces two pyruvate molecules, four ATPs (a net of two ATP), two NADH molecules, and two H2O molecules.One acetyl-CoA, one NADH, and one CO2 are produced for each pyruvate molecule when oxygen is present. One GTP, three NADH, one FADH2, and two CO2 are the products of the TCA cycle. GTP is an energy-rich compound similar to ATP that is typically used in environments with lower pH. The electron transport chain can then use NADH and FADH2 to make more ATP as part of oxidative phosphorylation.
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Brainly involved! :) Why is studying animals in the wild considered to be somewhat experimentally "out of control"?
A) There are many factors that cannot be controlled that could influence the study.
B) It does not take place in a laboratory and is therefore not a valid experiment.
C) The test subjects are not trained to behave in a certain manner.
D) The experimenters are as careful with recording their results.
Answer:
Hmmm i tied between A and C because they both seem correct but since C sounds a little off ima say A
Explanation:
Answer:
A)
Explanation:
Other answers seem to appear only partially correct or not correct at all. If there's anything unclear, feel free to ask.
Aerobic respiration takes place in the mitochondria because?
i’ll mark as brainliest!! and give u 20 points!! please help :(((
Answer:
A and D i think
hope this helps
4 pros and 4 cons of nuclear desalination
20 points
Four pros of nuclear desalination; nuclear desalination provides accessible drinking water, helps with habitat protection, provides water to the agricultural industry, and uses a large amount of energy.
Four cons of nuclear desalination; Waste Disposal, nuclear desalination could lower down Ocean populations, nuclear desalination creates Health Concerns, and uses energy.
a nucleic acid is Long repeating chain of what?
Adenine and Thymine are examples of...
Adenine and Thymine are examples of nitrogenous bases in a nucleotide.
What is a nucleotide base?A nucleotide is the monomer constituting DNA or RNA biopolymer molecules.
Each nucleotide consists of a nitrogenous heterocyclic base (or nucleobase), which can be either a double-ringed purine or a single-ringed pyrimidine; a five-carbon pentose sugar (deoxyribose in DNA or ribose in RNA); and a phosphate group.
The two classes of nitrogenous bases are purines and pyrimidines and they are as follows;
Purines - Adenine and GuaninePyrimidines - Cytosine, Uracil, ThymineAccording to this question, Adenine and thymine are examples of nitrogenous bases.
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g The gastrointestinal tract has 4 basic layers. Which layer is the one that comes in contact with the food that you eat?]
Answer:
Muscularis propria
Explanation:
The gastrointestinal tract has the following four basic layers:
1. Mucosa is the innermost layer
2. Submucosa is underneath the Mucosa
3. Muscularis propria
4. Adventitia is the outermost layer
Muscularis propria is the one that comes in contact with the food that you eat.
where are chloroplasts located
Your pet dog has 78 chromosomes in each of its body cells. How many chromosomes are in each of its sperm cells?
Answer:
the answer should be 39
Explanation:
the sperm cell has half as many chromosomes the a regular cell
Question 4 of 5
The box shows the element nitrogen as it appears in the
periodic table.
N
Nitrogen
14.0
Which two parts are needed to make a neutral atom of nitrogen?
O A. Electron clouds with a total of 14 electrons
I B. A nucleus with three protons and four neutrons
C. A nucleus with seven protons and seven neutrons
O D. Electron clouds with a total of seven electrons
Answer:D & C
Explanation:
In a strike-slip fault, the rocks on either side of the fault slip past each other sideways with little
Which of the following are not present in animal cells?
Fecal coliform is an indicator of what type of disease?
Answer:
Explanation:
Some waterborne pathogenic diseases include typhoid fever, viral and bacterial gastroenteritis and hepatitis A. The presence of fecal contamination is an indicator that a potential health risk exists for individuals exposed to this water.
Answer:
Thermotolerant coliform bacteria (commonly referred as fecal coliforms) are the group most frequently used as indicators of fecal pollution because they behave in a similar way to most pathogenic bacteria in the environment, and, during treatment, they are abundant and easy to determine.
DNA provides a very significant role in the formation and development of an organism.what is that role?
Answer:
The significant role that DNA provides is the organism's genetic information. It stores its information inside, and that's what makes up all the traits of the organism. All known cellular life contains DNA for this reason, and basically serves as long-term storage of information about the organism.
MARKING PEOPL AS BRAINLIST⚠️
Why does cell size need to be limited?
Where does the DNA come from that is in the parent cell?
Answer:
Your genome is inherited from your parents, half from your mother and half from your father. The gametes are formed during a process called meiosis. Like your genome, each gamete is unique, which explains why siblings from the same parents do not look the same.
The need to be able to pass nutrients and gases into and out of the cell sets a limit on how big cells can be. The larger a cell gets, the more difficult it is for nutrients and gases to move in and out of the cell. As a cell grows, its volume increases more quickly than its surface area.
Explanation:
The need to be able to pass nutrients and gases into and out of the cell sets a limit on how big cells can be. The larger a cell gets, the more difficult it is for nutrients and gases to move in and out of the cell. As a cell grows, its volume increases more quickly than its surface area.\
And as for the DNA, your genome is inherited from your parents, half from your mother and half from your father. The gametes are formed during a process called meiosis. Like your genome, each gamete is unique, which explains why siblings from the same parents do not look the same.
how are the cells in the leaf of a plant and the cells in the roots of the plant different
Answer:
Explanation:
The water needed for photosynthesis is absorbed through the roots and transported through tubes to the leaf. The roots have a type of cell called a root hair cell. ... Note that root cells do not contain chloroplasts, as they are normally in the dark and cannot carry out photosynthesis.
Answer:
genrally speaking :
1)the cells of a leaf have chloroplasts, the root cell doesnt
2)as a result of the first point, root cells dont carry out photosyntheis
3)the root hair cells have elongated structures for water and mineral absorption
Explanation:
5. Which of the following statements correctly identifies a way in which
prokaryotic cells are different from eukaryotic cells? *
Prokaryotic cells have flagella, while eukaryotic cells do not.
Prokaryotic cells have chloroplasts, while eukaryotic cells do not.
O
Prokaryotic cells only have free-floating DNA, while eukaryotic cells have DNA
enclosed in a nucleus.
Prokaryotic cells only have cell membranes, while eukaryotic cells have both cel
membranes and cell walls.
Answer:
I think the correct answer is the number 2
A student collects a sample of water from a pond near her home. She
examines a drop of the water under a microscope and sees four very
differently shaped single-celled organisms. Which of the following
can she reasonably conclude as the reason the organisms look so
different?
Answer:
A. Each organism had a different parent that passed on a set of unique genetic instructions.
Explanation:
Organisms can either be single-celled or multicellular. According to this question, a student collects a sample of water from a pond near her home. She then examines a drop of the water under a microscope and noticed it contains four very differently shaped single-celled organisms.
The single-celled organisms are of different shapes because they are from different parents, which passed on a set of unique genetic instructions via their genes to them. Organisms of the same species from the same parent will possess the same shape because they contain same gene which makes them look and behave similar.
However, in this case, the four different shaped single-celled organisms are of DIFFERENT SPECIES and hence, contain individual unique genes that makes them so
5. The role of mitosis in asexual reproduction has what effect on genetic variation?
a. It greatly increases genetic variation.
b. It limits genetic variation.
C. It prevents genetic variation from occurring.
d. It has no effect on genetic variation.
Answer: D: it has no effect on genetic variation.
Explanation:
What is planned goal for the Europa Clipper mission (if you answer you get 100 pints need ASAP
Answer:
NASA's Europa Clipper will conduct detailed reconnaissance of Jupiter's moon Europa and investigate whether the icy moon could harbor conditions suitable for life.
Explanation:
Do you think oxygen turns the penny dark brown all the way through or just on the surface
Answer:
just on the surface
Explanation:
you can clean it
ILL MARK BRAINLIEST PLEASE ANSWER QUICK!!!!
Answer:
C, B, A, D
Explanation:
I'm pretty sure this is it, sorry if it's wrong
A hurricane sweeps across the ocean and damages the houses of people living along the coast. This is an example of interactions between the
biosphere, atmosphere, and sand
hydrosphere, sand, and biosphere
atmosphere, sand, and hydrosphere
atmosphere, hydrosphere, and biosphere
Answer:
I think its atmosphere, sand, and hydrosphere
Explanation:
good luck :)
non- examples for Induction
Answer:
▲ Opposite of the act of inaugurating, or inducting into office or a position. blackballing. end. expulsion.
Explanation: