What might explain the reason why obligate anaerobes cannot grow at all in the presence of oxygen?
They lack an electron transport chain
The oxygen displaces their required carbon dioxide
They lack enzymes to degrade toxic forms of oxygen
They can only carry out fermentation
Answers
Obligate anaerobes cannot grow in the presence of oxygen due to their lack of enzymes to degrade toxic forms of oxygen. These organisms are adapted to live in environments without oxygen and have evolved to use alternative electron acceptors for energy production.
Oxygen, being a highly reactive molecule, can form harmful byproducts called reactive oxygen species (ROS), such as superoxide radicals, hydrogen peroxide, and hydroxyl radicals.
In order to protect themselves from ROS, most aerobic organisms possess specific enzymes, like superoxide dismutase, catalase, and peroxidase, which neutralize the toxic oxygen species. However, obligate anaerobes lack these protective enzymes and are unable to detoxify ROS. As a result, exposure to oxygen can lead to the damage of cellular components, such as proteins, lipids, and DNA, ultimately causing cell death.
The other factors mentioned, like the absence of an electron transport chain, displacement of carbon dioxide, or being able to carry out only fermentation, may contribute to the inability of obligate anaerobes to thrive in oxygen-rich environments, but they do not directly explain their vulnerability to oxygen toxicity. The primary reason remains their lack of defense mechanisms against the harmful effects of oxygen.
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Related Questions
Write your question here (keep it simple and clear to get the best answer)
Answers
QUESTION : If you study in Inproper light, then your eye sight get damaged. Is this true? Why?
The big idea of the Flame Test lab is
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The big idea of the Flame Test lab is to demonstrate the characteristic colors emitted by different metal ions when heated in a flame.
The Flame Test lab is a common chemistry experiment used to identify and distinguish between different metal ions based on the color of the flames they produce when heated.
The characteristic colors observed in the flame result from the excitation of electrons in the metal ions to higher energy levels, followed by their subsequent relaxation back to lower energy levels, accompanied by the emission of light.
The colors emitted by different metal ions are unique and can be used to identify the presence of specific metals in a sample. The Flame Test lab provides a visual demonstration of the relationship between the colors observed in the flame and the identity of the metal ions present in a sample, and it is widely used in chemistry education and analytical chemistry to teach about the properties of different metal ions and their spectroscopic characteristics.
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38. What do you think about the threat of nuclear war? Should that deter us from expanding our own nuclear energy? Should we be worried? Why or why not? 2+ sentences (opinion question)
the website is
https://www.nti.org/learn/countries/north-korea/
help me please please help me please
Answers
What two places can translation occur?
Answers
The big and small components of the ribosomal bind to the mRNA in the cytoplasm of prokaryotic organisms (bacteria and archaea), where translation takes place.
Translation takes place in the cytoplasm or within the endoplasmic reticulum membrane in eukaryotes through a procedure known as co-translational translocation. Prokaryotic and eukaryotic creatures have a subtle difference in these processes: in prokaryotes, translation involves the transfer of electrons, whereas in eukaryotes, translation happens in the endoplasmic reticulum. Therefore, the eukaryotic nucleus offers a unique compartment within the cell, enabling transcription and breaking to commence before the start of translation. As a result, in eukaryotes, translation takes place in the cytoplasm while transcription happens in the nucleus.
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The relationship between a food web and a food chain is most similar to the relationship between a road map and:
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Answer:
I think a driving route/road because a food web is a diagram made up of multiple food chains. A food web could not exist without food chains. So, it's basically the same, a road map could not exist without roads or driving routes.
which of the following is true for a eukaryote?
A. it is one of the first life forms to appear on earth.
B. it doesn't have a nucleus and organelles.
C. it must be a multicellular organism.
D it evolved from prokaryotes
Answers
Answer:
D it evolved from prokaryotes
Explanation:
let me know if you have any questions
How Many Milligrams Are In 1455 grams?
First To Answer Gets Brainliest 3
Answers
Answer:
Grams to milli-grams
1455 = 1455000
Just multiply by 1000
Answer:
1455000 milligrams.
•Multiply the grams by 1000 to find milligrams
5. The basic process of gas exchange requires no structures at all and is
called _
A. gills
B. spiracles
C. diffusion
Answers
Brainliest if you get it right
Answers
Answer:
A B C D is your answer....
pitcher plants are carnivorous plants that grow in areas where the soil contains low levels of key nutrients such as nitrogen. to obtain these nutrients, most pitcher plants capture prey using traps containing a digestive fluid. the captured prey are then broken down and digested, and the pitcher plant absorbs the nutrients. the traps of one species of pitcher plant, nepenthes hemsleyana, do not contain digestive fluid. instead they provide a suitable place for woolly bats (kerivoula hardwickii) to sleep. the feces from the bat are released into the trap where nutrients in the feces are absorbed and provide the plant with the nitrogen it needs. which of the following best describes the relationship between the pitcher plant and the woolly bat? responses the relationship is an example of parasitism because the bat is harmed while the plant benefits. the relationship is an example of parasitism because the bat is harmed while the plant benefits. the relationship is an example of mutualism because both the plant and the bat benefit. the relationship is an example of mutualism because both the plant and the bat benefit. the relationship is an example of commensalism because the plant benefits but the bat is unaffected. the relationship is an example of commensalism because the plant benefits but the bat is unaffected. the relationship is an example of commensalism because the plant is unaffected while the bat benefits.
Answers
Primary succession happens when a pristine environment is exposed (lava flow). Pitcher plants are carnivorous plants that may survive in areas with little nitrogen in the soil.
The majority of pitcher plants catch animals using digestive fluid-filled traps in order to obtain these nutrients. Most plants get adequate nitrogen from the soil's nitrates. Carnivorous plants must obtain their nitrogen from the digestion of their food because nitrates are in short supply where they can flourish. Nepenthes plants are carnivorous and eat insects mostly for food. They accomplish this using specialised pitfall traps known as "pitchers," which draw in, capture, and devour insects.
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describe how four spheres are considered an open system
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Answer:
These four subsystems are called "spheres." Specifically, they are the "lithosphere" (land), "hydrosphere" (water), "biosphere" (living things), and "atmosphere" (air). Each of these four spheres can be further divided into sub-spheres.
how does natural selection led to the adaptation of the cliff swallow population along l-80?
Answers
Answer:
0110011101101111001000000110011001110101011000110110101100100000011110010110111101110101011100100010000001110011011001010110110001100110
Explanation:
A book on a table has _______ potential energy than a book on a chair because the table is ________ off the ground.
Answers
Answer:
A book on a table has more potential energy than a book on a chair because the table is higher off the ground.
Explanation:
Feel free to correct me If i'm wrong :)
Answer:
ttttuyyyyyyyugtvyzj6dbydbxubfydkaidbghg
which cell component functions like the digestive system in the human body?
Answers
Answer:
Lysosomes
Explanation:
Other organelles like lysosomes are responsible for digesting and recycling toxic substances and waste. They are embedded with proteins called enzymes, which break down macromolecules, including amino acids, carbohydrates, and phospholipids.
Answer:
Lysosomes
Explanation:
Lysosomes serve as the cell's digestive system, degrading material brought in from outside the cell as well as digesting outdated components within the cell.
Y’all know the answers to this
Answers
Answer:
c
Explanation:
Answer:
i think option. B is correct.........
Blood dyscrasia is a potentially life-threatening infection caused by bacteria entering the bloodstream.
a. True b. False
Answers
The statement "Blood dyscrasia is a potentially life-threatening infection caused by bacteria entering the bloodstream" is (B) false because it is a term that refers to an abnormality or imbalance in the blood components, which include red blood cells, white blood cells, platelets, and plasma.
This imbalance in the blood components can be a result of various factors, such as genetic mutations, underlying diseases, or exposure to certain medications or toxins.
While blood dyscrasia itself is not an infection, it can potentially lead to life-threatening complications. Depending on the specific type of dyscrasia, symptoms and risks may vary. For example, anemia is a type of blood dyscrasia that affects red blood cell production, which can cause fatigue, weakness, and shortness of breath. Leukopenia, another type of blood dyscrasia, results in a reduced white blood cell count, which compromises the immune system's ability to fight infections.
It is essential to diagnose and manage blood dyscrasias promptly to avoid complications and protect overall health. Treatment options may include medication, blood transfusions, or bone marrow transplants, depending on the severity and underlying cause of the condition.
In conclusion, blood dyscrasia is not an infection but rather an imbalance in the blood components that can lead to various complications. It is vital to seek medical attention to diagnose and treat these abnormalities to maintain overall health. Hence, the correct answer is Option B False.
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Please help me out once again
Answers
I hope this help you
What part of DNA provides the code for proteins?
Answers
Answer:
Gene
Explanation:
The genome of an organism is inscribed in DNA, or in some viruses RNA. The portion of the genome that codes for a protein or an RNA is referred to as a gene. Those genes that code for proteins are composed of tri-nucleotide units called codons, each coding for a single amino acid.
Attached earlobes are a recessive trait in humans. In the tree below, people
with attached earlobes are shaded in. Which best describes the person
labeled X in the tree?
A. A female with no recessive alleles
B. A male with no recessive alleles
C. A male with one recessive allele
D. A female with one recessive allele
Answers
Answer:
It would be C
Explanation:
If you look at the tree you can see that one of the male's parents had the recessive allele, and one of the siblings has the ressive allele, the means the male could have the trait but isnt showing it.
A male with one recessive allele describes the person labeled X in the tree.
What is Recessive allele?
In terms of genetics, the term "recessive" describes the connection between an observed trait and the two inherited forms of a gene associated with that feature.
Each gene has two alleles that an individual inherits from each parent. When a characteristic is recessive, both of the (recessive) alleles of the gene that causes the trait must be present for the trait to manifest.
When there is only one copy of an allele, it has no effect at all. This is in contrast to a dominant trait, which can only be expressed when one of the two alleles is present.
Therefore, A male with one recessive allele describes the person labeled X in the tree.
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You find a small, elongated animal embedded in the sand with one end sticking out. Among other things, it has segmental musculature, a coelom, a notochord, and a complete digestive tract with an anus located partway down the body. This animal is a chordate. a larval echinoderm. either a larval echinoderm or a chordate. an annelid.
Answers
This animal with segmental musculature, a coelom, a notochord, and a complete digestive tract is a Chordate.
A is the correct answer.
Animals that have a notochord belong to the phylum (category) called Chordata. Vertebrates are included in the group, along with a few closely related invertebrates. just in case you're unfamiliar with the term. Notochord. Chordates get their name from a cartilage-based flexible skeletal rod.
The majority of the species that make up the phylum Chordata, or class of backboned animals, are vertebrates (subphylum Vertebrata). Vertebrate chordates include creatures including fish, amphibians, reptiles, birds, and mammals. One species of mammal that falls under the chordate category is the contemporary human.
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The complete question is:
You find a small, elongated animal embedded in the sand with one end sticking out. Among other things, it has segmental musculature, a coelom, a notochord, and a complete digestive tract with an anus located partway down the body. This animal is:
A. a chordate.
B. a larval echinoderm.
C. either a larval echinoderm or a chordate.
D. an annelid.
during exhalation, the ribs become depressed as the intercostal muscle relax - this the lung volume decreases which increases the alveolar pressure. what does this cause
Answers
Answer:
The correct answer will be option A.
Explanation:
Exhalation is a mechanism of breathing which exhales out the gases from the lungs to the atmosphere.
During the exhalation process the thoracic volume decreases which decrease the lung volume. This decreases alveolar volume. Due to this decrease in alveolar volume the intra- alveolar pressure increases above atmospheric pressure up to +2 cm of H₂O which results in the release of the gas or air out of the lungs.
Thus, option A is the correct answer.
all of the following mechanisms are used to regulate protein production except group of answer choices dna replication. splicing the breakdown of mrna. protein activation.
Answers
All of the given mechanisms, including DNA replication, splicing, and protein activation, are involved in regulating protein production except for the breakdown of mRNA.
Protein production is a highly regulated process involving multiple mechanisms. DNA replication is not directly involved in regulating protein production but is responsible for the replication and transmission of genetic information from one generation to the next. It is not directly related to the regulation of protein synthesis.
On the other hand, splicing plays a crucial role in gene expression regulation. It is the process by which introns (non-coding regions) are removed from pre-mRNA molecules, and exons (coding regions) are joined together to form mature mRNA. This splicing process influences the types and amounts of proteins produced by alternative splicing and regulation of gene expression.
Protein activation refers to the post-translational modifications that occur after protein synthesis to activate or deactivate proteins. These modifications include phosphorylation, glycosylation, acetylation, and others, which can alter the protein's structure and function.
The breakdown of mRNA, also known as mRNA degradation, is involved in the regulation of protein production. It is a process by which mRNA molecules are degraded and removed from the cell, controlling the abundance and availability of mRNA for translation into proteins.
In summary, all the given mechanisms, except the breakdown of mRNA, are involved in regulating protein production. DNA replication is not directly involved in protein regulation, while splicing and protein activation play crucial roles, and mRNA degradation influences the availability of mRNA for protein synthesis.
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Which organelle makes proteins using coded instructions that come from the nucleus
Answers
Answer:
Ribosome
Explanation:
Ribosomes are small particles made up of RNA and protein that produce proteins following coded instructions that come from the nucleus
Hair samples can provide information on all of the following EXCEPT.....
a
Age
b
Gender (sex)
c
Race
d
Hair samples can provide information on all of these.
Answers
Answer:
the answer should be A) Age
Which type of cell is produced at the end of meiosis?.
Answers
Answer:
Two genetically identical daughter cells!
Explanation:
I hope this helps :)
Darwin observed finches with many different shapes and sizes of beaks on the Galapagos Islands. He noticed that these finches lived in different areas of islands and on different islands that had different food sources. The beaks of finches that lived in a particular area were adapted better for eating the food available in that area. For example, the medium ground finches were well adapted for eating small seeds, an abundant food source on the island. During a severe drought, many plants that produced the small seeds died, limiting small seeds available for food. Another food source for the birds was a larger, harder seed produced by a different plant.
What do you predict would occur? Choose all THREE that apply.
Responses
A Some of the medium ground finches left to find food sources in other places.Some of the medium ground finches left to find food sources in other places.
B The finches all died.The finches all died.
C Birds with thicker beaks were able to eat the larger seeds and had less competition for food allowing them to survive and reproduce.Birds with thicker beaks were able to eat the larger seeds and had less competition for food allowing them to survive and reproduce.
D The medium ground finches developed thicker, larger beaks.The medium ground finches developed thicker, larger beaks.
E The medium ground finches competed for the limited number of small seeds and many of them died.
Answers
⚠️please help ASAP, this is a one of the last questions for a very important test I’m taking and I would like to make sure my answer is correct
What did sharks and
rays develop that
their ancestors did
not have?
A. lobes that were the beginnings of arms and legs
B. jaws that helped with catching prey
C. legs to be able to survive on land
D. amniotic eggs
Answers
Answer:
i believe its D, amniotic eggs.
Explanation:
Which of the following is NOT a resource that organisms fight over for survival?
Reproduction
Food
Water
Oxygen
Shelter
Answers
Answer:
Oxygen
Explanation:
Oxygen because when was the last time you saw one organism beating up another organism because that one was taking too much, its air, or air near it. Organism, however, do fight for mating rights (Reproduction), Food, Water, and Shelter because these are things that could go scarce, unlike oxygen which is always being pumped out by plants.
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Fermentation allows for the production of ATP without using either oxygen____________ or any _________________________________.
Answers
Answer:
Fermentation allows for the production of ATP without using either oxygen or any ELECTRON TRANSPORT CHAIN.
Would damage to γ-motor neurons result in an inability to contract the muscle?
Infants are monitored for their developmental milestones at each visit to the doctor. One of the most notable milestones when dealing with motor function is development of the pincher grasp, in which the baby is able to use his or her finger and thumb to grab a small object. How does this relate to the concept of motor units?
Answers
Yes, damage to γ-motor neurons can result in an inability to contract the muscle.
γ-motor neurons are responsible for controlling the sensitivity of the muscle spindles, which are responsible for detecting changes in muscle length. If the γ-motor neurons are damaged, the muscle spindles will not be able to detect changes in muscle length and the muscle will not be able to contract properly.
The development of the pincher grasp is related to the concept of motor units because it requires the coordination of multiple motor units. A motor unit is a group of muscle fibers that are controlled by a single motor neuron. In order to perform the pincher grasp, multiple motor units must be activated in a coordinated manner to allow for the precise movement of the finger and thumb.
This requires the proper functioning of the motor neurons, including the γ-motor neurons, which control the sensitivity of the muscle spindles. Without the proper functioning of the motor neurons, the pincher grasp may not develop properly.
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