why does a red blood cell unable to replace damaged protein?
The reason is because the cells are unable to replace and lack DNA and cell organelles such as nucleus, ribosomes and mitochondria which are crucial for protein synthesis, assembly and repair.
From: Taskmasters, Ace
Final answer:
Red blood cells cannot replace damaged proteins because they lack the necessary organelles for protein synthesis, leading to a range of complications including anemia. In particular, sickle cell anemia results from a mutation in hemoglobin that alters the shape of RBCs and causes premature breakdown, as well as various health issues.
Explanation:
Red blood cells (RBCs) have a limited lifespan and are unable to replace damaged proteins due to a lack of organelles that are essential for protein synthesis. When myeloid stem cells are defective or overtaken by cancer, insufficient RBCs are produced, leading to anemia. Specific diseases, like sickle cell anemia, cause the production of abnormal hemoglobin (HbS), where valine is substituted for glutamic acid. This mutation leads to the sickle shape of red blood cells, causing them to clump in blood vessels and subsequently break down prematurely, leading to a shortage of RBCs. This results in symptoms such as fatigue, shortness of breath, and growth problems in children.
Oxidatively damaged proteins are usually degraded by the proteolysis process; however, when extensively oxidized, these can become resistant to break down and interfere with cellular functions. In sickle cell anemia, abnormal hemoglobin forms fibers, distorting RBCs into a crescent shape, which obstructs blood flow and causes significant health issues. Moreover, RBCs may also be destroyed during conditions like transfusion reactions or erythroblastosis fetalis.
Metabolism is _____.
1. a measure of the hydrogen ion concentration in a solution
2. the energy required to start a chemical reaction
3. all of the chemical reactions in an organism required to sustain life
4. a chemical reaction in which the substrates trade constituent parts
Answer: 3 : All of the chemical reactions in an organism required to sustain life.
Explanation: Metabolism is the process of converting food into energy form ( ATP). Metabolism is set of biochemical reactions which is completed in presence of necessary enzymes and is essential to sustain life.
In which part of a lab report would the following sentence most likely occur?
“Since the data showed that the growth of the fruit flies was not affected by the temperature, the hypothesis was not supported.”
hypothesis
procedure
conclusion
Answer: Conclusion
Explanation:
A hypothesis can be define as presupposed statement for the cause of natural processes based on few evidences. This is required to be tested by scientific methodology.
Conclusion is the description of the findings of the experiment. It will describe the fact that the output of the experimentation was not related to the set hypothesis or not answerable for scientific question or vice versa.
Conclusion is the correct option. As the data obtain cannot justify the hypothesis. It is depicting the outcome of the experiment.
Enzymes effect the reactions in a living cell by changing the
A) products of the reaction
B) Speed of the reaction
C) Temperature of the Reaction
D) pH of the reaction
are puffer fish and balloon fish and blow fish the same thing
Final answer:
Puffer fish, balloon fish, and blowfish are different names given to the same type of fish that belong to the family Tetraodontidae . They can puff up their bodies to appear larger and intimidate predators, thanks to their elastic stomachs and the ability to store water or air in their bodies.
Explanation:
Puffer fish, balloon fish, and blowfish are all different names given to the same type of fish, which belong to the family Tetraodontidae. So, yes, puffer fish, balloon fish, and blowfish refer to the same thing.
These fish are known for their unique ability to puff up their bodies by swallowing water or air, which makes them appear larger and more intimidating to potential predators.
The inflation is possible due to the presence of elastic stomachs and the ability to store large amounts of water or air in their bodies. This unique adaptation helps protect them from predators. Therefore statement written above is true
This image is of a human embryo. It took many weeks of development to get to this stage. Prior to this, all of the human cells were not differentiated, and the organism would have simply looked like a grouping of all the same type of cells. What is the name given to the type of cells in humans that are not differentiated?
What is a tetrad?
A. A chromatid before meiosis
B. Another term for a sperm cell
C. A haploid cell produced by meiosis
D. Two sets of sister chromatids
A tetrad is a structure that forms during meiosis I, consisting of two sets of sister chromatids. It allows for the exchange of genetic material between homologous chromosomes, contributing to genetic variation in offspring.
A tetrad is a structure that forms during meiosis, the process of cell division that produces haploid cells such as sperm and egg cells. Specifically, a tetrad refers to two sets of sister chromatids that come together during meiosis I.
During meiosis I, homologous chromosomes pair up and undergo a process called synapsis. This pairing results in the formation of a tetrad, which consists of two homologous chromosomes, each consisting of two sister chromatids. The sister chromatids within each homologous chromosome are identical because they are replicated copies of the same chromosome.
The formation of a tetrad allows for the exchange of genetic material between the homologous chromosomes through a process called crossing over. Crossing over occurs when sections of DNA are swapped between the non-sister chromatids of the homologous chromosomes. This genetic recombination contributes to genetic variation in offspring.
After crossing over and genetic recombination have occurred, the tetrad undergoes separation during meiosis I. This results in the formation of two haploid cells, each containing one set of sister chromatids. These haploid cells are then further divided during meiosis II to produce four haploid cells, each containing a single set of chromosomes.
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what structure is outside of the nucleus of the cell and contains DNA
Which of the following distinguishes a prokaryotic cell from a eukaryotic cell?
the presence of a nucleus
the presence of a cell membrane
the ability to interact with the environment
the ability to reproduce
Answer:
The presence of a nucleus
Explanation:
Living organisms have been classified into a large group called DOMAIN. The basis of this classification is the possession or not of a membrane-bound housing that encloses the organism's genetic material. This housing is called NUCLEUS. Based on this, organisms were either classified as EUKARYOTES or PROKARYOTES.
Eukaryotic organisms, in addition to the possession of other membrane-bound cellular organnelles, possess a membrane bound nucleus that surrounds their genetic material. Prokaryotic organisms do not have these membrane-bound nucleus, instead their genetic material is found naked in a region of their cytoplasm called NUCLEOID.
What might be a consequence of unlimited human population growth?
A. There will be no undeveloped countries economically.
B. Humans will not use enough of the earth's resources.
C. There will not be enough resources to sustain a high human population.
D. Birth rates will become too low.
Which one of the following choices is not a monosaccharide?
a. glucose.
b. fructose.
c. galactose.
d. sucrose.
Answer: The correct answer is- D) Sucrose.
Monosachharide is the simplest form of a sugar that can not be hydrolysed into any further simple form. It is also called as simple sugar.
Example of monosachharide- Glucose, fructose, galactose.
Sucrose is a disaccharide ( formed by two monosachharide units) as it is made up of two monosachharide that is glucose and fructose.
Sucrose is a disaccharide rather than a monosaccharide. Fructose and glucose are monosaccharides that combine to make sucrose. Sucrose is not a monosaccharide.
The simplest carbohydrates are monosaccharides, which are also known as simple sugars. The most frequent monosaccharides are unbranched single-bonded chains with three to six carbon atoms.
The most fundamental type of carbohydrates is monosaccharides. The majority of organisms convert monosaccharides like glucose into energy, which they then store or use as needed. The number of carbon atoms in this form of glucose and the functional group that is connected to it is used to classify it. Aldose is the name given to the monosaccharide that includes aldehyde, while ketose is the name given to the monosaccharide that has a ketone group.
Therefore, sucrose is not a monosaccharide.
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Which process will decrease the level of CO2 in the atmosphere? growing trees cutting trees burning trees increasing the human population
help me out on #31 I would appreciate it thanks.
The traditional view of mangrove forests as wastelands and unhealthy environments helped promote their degradation because _______.
Answer: People did not feel it was necessary to preserve them they saw them serving no purpose.
Explanation:
What is the main function of the nucleolus?
How a main sequence star like the sun is able to maintain a stable size?
How are photosynthesis and cellular respiration related?
the processes are not related: photosynthesis occurs in plants and cellular respiration occurs in animals
photosynthesis and cellular respiration are part of the same electron transport chain
cellular respiration produces ATP, which is used to power the steps of photosynthesis
the sugars produced in photosynthesis are broken down in cellular respiration
Answer:
Option D, the sugars produced in photosynthesis are broken down in cellular respiration
Explanation:
Photosynthesis and cellular respiration are connected in a way that product of one is used as reactant in the other one. Here, the products of photosynthesis are used in cellular respiration. The glucose and oxygen produced during photosynthesis are used in cellular respiration to produce carbon dioxide and oxygen. Both the processes uses ATP as a source of energy
Hence, option D is correct
The brain is most active during which portion of each sleep cycle? A. the beginning of each sleep cycle B. the middle of each sleep cycle C. the end of each sleep cycle D. The brain is not active during the sleep cycle.
Answer:
B
Explanation:
Final answer:
The brain shows the highest level of activity similar to wakefulness during the REM stage of sleep, which normally occurs toward the end of each sleep cycle. So the correct option is C. the end of each sleep cycle.
Explanation:
The brain is most active during different portions of the sleep cycle. While we do go through stages of lighter and deeper sleep, the brain does not simply shut off. Instead, the brain goes through a series of complicated chemical changes and displays various brainwave activities throughout these stages. The REM portion of the sleep cycle, in particular, shows brainwave patterns that are very similar to those during wakefulness. If we're discussing the peak activity in terms of brainwave similarity to an awake state, the brain is most active during the REM stage, which tends to happen toward the end of each sleep cycle. Therefore, the answer to the question would be C. the end of each sleep cycle.
Biology is an interdisciplinary study. Explain what that means in your own words. Give a detailed example or story—from the news, from your life, or from the lives of people you know—that clearly illustrates the interdisciplinary nature of biology and the importance of biology in the world around you.
Biology is an interdisciplinary study that encompasses everything from cellular biology to global ecosystems, often intersecting with other scientific fields as demonstrated by the study of the Zika virus and efforts to address medical and environmental challenges.
Biologists might investigate elements from the cellular level to the complexity of entire ecosystems and the planet as a whole. This intertwining with various other disciplines is evident through the daily news, where we frequently encounter topics such as outbreaks of Escherichia coli in spinach, efforts to cure AIDS, Alzheimer's disease, and cancer, and global initiatives to combat environmental and climate issues.
A practical example of biology's interdisciplinary nature is the study of the Zika virus, which illustrates how biology, epidemiology, and public health converge. During the Zika virus outbreak, understanding the biology of the virus was essential not only for developing a vaccine but also for advising public health initiatives and creating models to predict and curtail the spread of the virus.
What is a cell and what are the parts of a cell?
A cell is a unit of life It includes features from all cell types. A cell consists of three parts: the cell membrane, the nucleus, and, between the two, the cytoplasm. Within the cytoplasm lie intricate arrangements of fine fibers and hundreds or even thousands of miniscule but distinct structures called organelles.
The adjustment of materials that follow a major earthquake often generates smaller earthquakes called?
Foreshocks
Surface waves
Aftershocks
Body waves
The right option is; Aftershocks
The adjustment of materials that follow a major earthquake often generates smaller earthquakes called aftershocks.
Aftershocks are lower intensity earthquakes that follow the main (largest) shock of an earthquake sequence. Aftershocks are usually smaller than the main shock, but they tend to be the most severe and occur more often in the hours and days after an earthquake. The larger the main shock, the larger the aftershocks. However, the intensity and magnitude of aftershocks reduces over time.
which substance acts as a buffer in natural water
The material which acts as a buffer in natural water is - Decomposing animal elements. Adding these elements will probably combat PH difference if another acid or base are combined. This will create an atmosphere where we could sustain the pH of the solution to be extremely stable
What is the atomic number for neon?
Ques.what will happen if the stretch receptors of the urinary bladder wall are totally removed?
a)there will be no micturation
b)urine will not be collected in bladder
c)micturation will continue
d)urine will continue to collect normally in bladder Ques.what will happen if the stretch receptors of the urinary bladder wall are totally removed?
a)there will be no micturation
b)urine will not be collected in bladder
c)micturation will continue
d)urine will continue to collect normally in bladder
During DNA replication, which sequence of nucleotides will bond to the sequence ACGTAT?
A. TCGATA
B. UGCAUA
C. TGCATA
D. UCGUAU
Ans.
DNA replication involves formation of two identical copies from DNA from a single parent DNA molecule. The parent DNA strands act as template, and new DNA strands are made by DNA polymerase enzyme, complementary to parent strands.
According to base-pair rule, adenine (A) pairs with thymine (T) and Guanine (G) pairs with cytosine (C). Thus, the sequence TGCATA will bind to the sequence ACGTAT.
Thus, the correct answer is 'option C). TGCATA.'
Leaves with carotenoid pigment turn _________ during the fall.
a. red and green
b. yellow and orange
c. green
d. brown and yellow
The correct answer is option (b). yellow and orange.
The carotene or tetraterpenoids is a class of pigment produced by many organism including plants and the fungi. This pigment gives the yellow and the orange color to the leaves.
Generally, the leaves are green colored, due to the presence of chlorophyll, but during the fall, the amount of chlorophyll is decreased and the carotene gives a orange or yellow color to the leaves.
distinguish between monogenic & polygenic inheritance ...?
Some biology students wanted to determine whether a pair of brown mice purchased at a pet store was homozygous dominant or heterozygous for fur color. They let the mice mate and examined the offspring. Six mice were born. All six had brown fur.
Some of the students felt that this was enough evidence to prove that the mice were homozygous for brown fur color. Other students did not, so another experiment was planned.
Describe the next experiment the students could conduct to determine whether the parent mice are homozygous brown or heterozygous. Explain your answer.
...?
Mark me brainiest answer is b
How does natural selection change the frequency of genes or traits over many generations? Biology students conducted an experiment mimicking genetic variation and coloration. Students used different colored beans to represent animals that might be prey: mice, for example. A student in each group was the predator: a hawk. Beans (mice) were randomly scattered on multicolored floor tiles, each color within four tiles. The hawk collected mice (beans) for 10 seconds. Mice not eaten reproduced. Three generations of data a shown in the table.
Speckled and striped beans (mice) had the best survival rates. Why?
A) They reproduced very rapidly.
B) Coloration was a form of camouflage.
C) They mimicked other mice and were spared.
D) The speckled and striped beans had a wider range.
what is a good sentence for the word absolute dating
a naked male corpse was found at 8 a.m. on Tuesday, July 9. The air temperature was already 26.7 degrees Celsius. The body exhibited some stiffness in the face and eyelids and had a body temperature of 34.4 degrees Celsius. Livor mortis was not evident. Approximately how long ago did the man die? CSI
The time of death for the man is estimated to be a few hours before his body was found at 8 a.m., possibly within a 2-6 hour timeframe based on the observed onset of rigor mortis and the body temperature of 34.4 degrees Celsius, as the body cools post-mortem. Further forensic evidence would be needed for a more precise determination.
Explanation:Estimating the time of death for the na ked male corpse found at 8 a.m. on Tuesday, July 9, can be approached by considering several forensic factors including body temperature (the post-mortem interval), rigor mortis, and livor mortis. The body temperature noted was 34.4 degrees Celsius, which is lower than the average normal body temperature of 37.0 degrees Celsius.
In general, after death, the body temperature falls by about 1-1.5 degrees Celsius per hour under normal conditions. However, the exact rate can be influenced by factors such as environmental temperature, the deceased's clothing, and body composition. Given that some stiffness was observed in the face and eyelids, we can infer the onset of rigor mortis, which typically begins within 2-6 hours post-mortem and is fully developed by approximately 12 hours. The absence of livor mortis suggests that the body may have been discovered fairly soon after death.
Combining these observations with known scientific data about normal body temperature ranges allows us to hypothesize that the man's death occurred a few hours before his body was found, potentially within a range of 2-6 hours prior to discovery given the onset of rigor mortis. However, this estimation can vary based on environmental conditions and the individual's specific circumstances at the time of death. It is important to note that while these methods can provide an estimate, they are not exact and should be corroborated with additional forensic evidence for a more accurate determination.