The oxidase test is used to differentiate between fermentative and oxidative metabolism.Fermentative and oxidative metabolism are two types of metabolic pathways that are utilized by microorganisms for energy production.
Fermentative metabolism occurs when glucose is broken down into organic compounds without the presence of oxygen. On the other hand, oxidative metabolism occurs in the presence of oxygen and results in the complete breakdown of glucose to CO2 and water.
The oxidase test is used to differentiate between these two types of metabolism by identifying whether an organism produces cytochrome oxidase, an enzyme involved in the electron transport chain in oxidative metabolism. Results of the oxidase test include:Positive result: A blue-purple color change on the strip indicates that the organism produces cytochrome oxidase and is capable of oxidative metabolism.
Examples of organisms that produce cytochrome oxidase and test positive for the oxidase test include Pseudomonas aeruginosa, Neisseria spp., and Vibrio cholerae.Negative result: No color change on the strip indicates that the organism does not produce cytochrome oxidase and is incapable of oxidative metabolism. Examples of organisms that do not produce cytochrome oxidase and test negative for the oxidase test include Escherichia coli and Streptococcus spp.
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How does an atom become a positive ion?
a. It gains an electron
b. It gains a neutron
c. It loses a neutron
d. It loses an electron
Answer:
This does not happen all the time but an atom's charge is like a scale if there is more electrons than protons then it will be negative and if there is less electrons than protons then it be positive.
Explanation:
What parts of the animal do you think were removed to make bath sponges a marketable product?
Answer:
The natural sponges we use in our baths are actually animal skeletons. Bath sponges consist of a highly porous network of fibres made from a collagen protein called spongin. The skeletons are obtained by cutting the growing sponges and soaking the cut portions in water until the flesh rots away. The exposed network of spongin fibres is cleaned and bleached. In recent years New Zealand scientists have investigated the possibility of farming a native species of bath sponge, Spongia manipulatus, for commercial production. Sea sponges have been over-harvested from the major sponge-gathering areas around the Mediterranean, Caribbean and Florida coasts, but demand remains high. Pictured here are two New Zealand bath sponge skeletons, bleached and unbleached.
Explanation:
Which does a monomer most closely resemble?
A) link in a chain
B) circle
C) chain
D) intersections
Answer:
A
Explanation:
Answer:
I would say A. but it could also be C.
Explanation:
What is an example of reactivity?
A. A piece of paper being torn
B. A nail heating up
C. An ice cube melting
D. A bicycle rusting
HELP ME PLS
Gene therapy involves the transplantation of normal genes into a genome in place of missing or defective genes. Many scientists believe that gene therapy will lead to revolutionary new treatments for cancer. Why do you think gene therapy is such a promising field for this disease?
Answer:
it is so promising for the medical field because as people age their gene's and dna age. as the dna ages sometimes certain proteins are mixed up and if the replicate themselves they could cause a deformity or cancer. switching out those bad gene's with better ones could help reduce the death rate of cancer by stopping the cancer cell's from multiplying.
Explanation:
hope that's right
Gene therapy attempts to treat illness or strengthen your body's resistance to illness by replacing a damaged gene or adding a new gene. Numerous disorders, including cancer, cystic fibrosis, heart disease, diabetes, haemophilia, and AIDS, may be treated with gene therapy.
What gene therapy is such a promising field for disease?Patients could be able to live without the stress of continual medical care or day-to-day disease management thanks to gene therapy. We go beyond assisting patients in controlling their illnesses.
Because people's genes and DNA mature as they become older, it holds great promise for the medical industry. Some proteins can mix up as the DNA matures, and if they reproduce themselves, they could result in a deformity or cancer.
Therefore, By stopping the cancer cells from proliferating, replacing those harmful genes with better ones may help lower the death rate from cancer.
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What term describes a pair of chromosomes consisting of one chromosome from the father (paternal chromosome) and one from the mother (maternal chromosome)?
Answer:
A couple of homologous chromosomes, or homologs, are a set of one maternal and one paternal chromosome that pair up with each other inside a cell during fertilization.
Explanation:
What is life without death?
Answer:
endless cycle of hell
Explanation:
Answer:
life without death is like not having a life at all. you need to die to have been living.
Which structure is found in an animal cell but not in a plant cell?
a) nucleus b) mitochondria c) lysosomes d) ribosomes
Why are roses red?
would appreciate an answer
Answer:
While the researchers expected that flowers would be red due to the presence of red pigments, they found that plants often combine yellow-orange carotenoids with purple anthocyanins to produce red flowers.
Explanation:
Biology/science
During which phase would you expect the amount of DNA in the cell to increase?
Answer: you would expect the DNA the increase in the Interphase
How is universe and galaxy alike
Answer:
they are full of meteorites ,stars ,planets and sun's
WILL MARK BRAINLIST IF YOUR ANSWER MAKES SENSE
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An area's climate is described by its average temperature and precipitation patterns over a long period of time.
Why does describing an area's climate require weather data for more than one or two years?
Please please answer this! I have it due today, and I really struggle with science!
Answer:
Describing an area's climate requires weather data for more than one or to years because climate is the weather conditions over a very long period of time.
Explanation:
out of 500 fruit brought i
n a market,it is know from experience that 25 fruit are bad , what is the probability that a fruit picked with good
Answer:
formula is "part/wholeX100" = 25/500 X100 = 5% bad fruit 5-100= 95% therefore the probability that a good fruit will be picked is 95%
Explanation:
I hope that's clear...
In a hypotonic solution, the solute concentration is higher
outside the cell.
True
False
Answer:
False I think not too sure
Explanation:
ANSWERRRRR ITTTT TYYY
What is unique about stem cells?(1 point)
They are only found in plants.
They are unspecialized.
They are differentiated.
They are only found in embryos.
Answer:
The answer is that they are unspecialized.
Explanation:
Stem cells can turn into multiple different cell types, therefore they have no specific cell that they will become. They are unique because they can turn into many different cells. (Example being one turning into a tissue cell while another turns into a cell for the lungs)
Stem cells are UNSPECIALIZED cells, which are capable of self-renewing in order to create functional tissues.
Stem cells are body cells that have the ability to generate new cell types.Conversely, mature cells (e.g., mature red blood cells) are specialized to play a specific role (e.g. red blood cells transport oxygen).Embryonic stem cells are found in embryos, while adult stem cells are localized in the bone marrow of adults.Embryonic stem cells are pluripotent, thereby they differentiate into different cell types.In conclusion, stem cells are UNSPECIALIZED cells, which are capable of self-renewing in order to create functional tissues.
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What does scientific evidence indicate to be the correct sequence of these events, from present to past, in the evolution of life on Earth?
origin of mitochondria
origin of multicellular eukaryotes
origin of chloroplasts
origin of cyanobacteria
origin of fungal-plant symbioses
5, 2, 3, 1, 4
2, 5, 1, 4, 3
4, 1, 2, 3, 5
3, 1, 4, 2, 5
Answer: the answer is A:
5,2,3,1,4 :)
This one can be tricky, sometimes it asks for it from present to past (52314) and sometimes it asks from past to present (41325) so pay attention to the wording of the question.
The correct sequence of the events from present to past, in the evolution of life on Earth, is 5, 2, 3, 1, 4. The correct option is A.
What is evolution?Evolution is the changing or development of an organism or any place with the moving time. Evolution occurs due to many reasons like survival, adjustment, etc.
Thus, the correct sequence is:
5. origin of fungal-plant symbioses
2. origin of multicellular eukaryotes
3. origin of chloroplasts
1. origin of mitochondria
4. origin of cyanobacteria
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Metric system
.034m = ? cm
A boy volunteers to help his mom build a vegetable garden. Right before they started to build the garden, he notice a huge ant pile right in the middle of where they wanted to build the garden. This ant pile is an example of:
A. An ecoregion B. A biome C. A microhabitat D. A mini-area
Answer: I think microhabitat
What will happen to the concentration of ATP, NADPH, and sugar when you increase the temperature. Will they decrease, increase, or stay the same?
Answer:
Hello!What happens with ATP, NADPH, and sugar when you increase the temperature is that the mixture will INCREASE.
Explanation:
Hope this helps! :)-jade
The concentration of ATP, NADPH, and sugar will increase if temperature increases.
The rate of photosynthesis is depends upon several factors such as Light intensity and Temperature.
In very low temperature the rate of photosynthesis decreases because some enzymes will not able to work at very low temperatures.At very high temperature the rate of photosynthesis decreases because, enzymes denatured and become unable to work.If the temperature is increased slightly, the the rate of photosynthesis will increase because the enzymes become more active.Therefore, the concentration of ATP, NADPH, and sugar will increase if temperature increases.
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Read each question carefully. Write your response in the space provided for each part of each question. Answers must be written out in paragraph form. Outlines, bulleted lists, or diagrams alone are not acceptable and will not be scored.
White blood cells called B cells produce proteins that can be used for the treatment of certain illnesses. However, these B cells do not live for very long on their own. To keep the B cells growing for a long time in laboratories, scientists fuse the B cells with cancer cells (fused B-cancer cells) that do grow for a very long time. The particular cancer cells used for the fusion are treated with chemicals that make them unable to produce the nitrogenous bases adenine and guanine, but the B cells with which they are fused do produce these nitrogenous bases. The scientists grow the large fused B-cancer cells in a growth medium that contains necessary nutrients for the cells and includes a source of carbon.
(a) Describe the role of carbon in biological systems.
Answer:
The role of carbon in biological systems is to allow the formation of organic molecules, in addition to providing energy for living beings.
Explanation:
Carbon is the fourth most abundant element on earth and one of the main elements of the viological systems, and its presence is essential for life on the planet to be maintained.
Carbon is necessary for all living beings, without exception. This is because it is used in the construction of organic molecules without which no living thing can survive, in addition to providing energy when it participates in sugar molecules, such as carbohydrates.
Carbon is the backbone of all biological molecules. It is the most essential element for life processes.
Carbon is the most important element required in nature. This is because all organic molecules that occur in nature all contain carbon atoms. It lies at the backbone of all biological molecules.
Bio molecules such as sugars, enzymes, proteins, fats etc all contain long chains of carbon thereby showing that there can not be any life form without carbon.
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What two essential molecules found in all organisms, require nitrogen to make them?
A. fats
B. DNA
C. carbohdrates
D. Proteins
Answer:
Two essential molecules found in all organisms and that require nitrogen to make them are DNA and proteins (options B and D).
Explanation:
Nitrogen is the most abundant element in the atmosphere and is important for the construction of some organic molecules.
Both nitrogenous bases and amino acids have nitrogen in their molecular structure, and they serve for the constitution of nucleic acids, such as DNA, and proteins.
The process of incorporating nitrogen into living organisms begins with the nitrogen-fixing bacteria found in the soil, which are absorbed by plants and then consumed by animals.
Other options are not correct because both carbohydrates and fats have a predominant composition of carbon, hydrogen and oxygen.
Which best describes the nucleus of an atom?
Name the phenomenon in which shrinkage of cytoplasm takes place, when a cell is
placed in hypertonic medium.
Answer:
Plasmolysis
Explanation:
This phenomenon occurs when a cell is placed in a hypertonic (there is more solvent inside the cell than outside the cell) medium.
Due to this osmotic imbalance, the cell starts to lose water to its environment but due to the difference in volume between the cell and the hypertonic medium it's in (in other terms) a candle consumes itself lighting others.
It will continue to lose water to its environment till it has shrunk and become flaccid. This is known as plasmolysis.
How are doctors and paleontologists most similar?
Both diagnose injuries.
Both study bones.
Both look at preserved remains.
Both develop treatment plans.
Answer:
Both study bones.
Explanation:
The similarity between a doctor and paleontologist is that both study bones. A medical doctor deals with human life, a paleontologist studies the remains of preserved dead organisms in nature.
In both professions, it is common to encounter bones of the subject. A good knowledge of bone anatomy is important for recommendation of treatment. The bone structure can be used by a paleontologist to make very important deductions about how an organism once lived.
Answer:
both study bones
Explanation:
i just took the test home slice
All of the following have membranes around them EXCEPT one.
1.endoplasmic reticulum
2.chloroplast
3.ribosome
4.nucleus
Answer:
Ribosomes
Explanation:
Rough endoplasmic reticulum, choloroplast and nucleus all are important organelles and are membrane bound except for ribosome
What are hydrogen bonds and how do they affect the physical characteristics of water?
Explanation:
A hydrogen bond is a common type of chemical bond in organisms. As the name suggests, this type of bond involves a hydrogen atom. The hydrogen is attracted to a strongly electronegative atom, such as oxygen, fluorine, or nitrogen of a polar covalent bond in the same or another molecule.
This gives water unique properties, such as a relatively high boiling point, high specific heat, cohesion, adhesion and density.
Help can someone answer this question xx
Plz I need help with this!!
Explain how entropy relates to the amount of energy that is available in the different trophic levels of a food chain
Answer:
There ya go!!
Explanation:
Entropy is defined as the measure of heat that is available in any kind of system. When moving towards the next levels in the food chain, the distribution of heat will be less at each stage and at the lower levels of food chain the heat energy that is produced will be high and the value of entropy will be less.
Answer:
Entropy is the tendency of a system towards a larger number of random arrangements. Overall, entropy must increase during processes, so a system will tend towards greater disorder. The energy available for organisms decreases from one trophic level to another, because some of the energy is dissipated as heat from each level to the next because of that tendency toward disorder.
Explanation:
List out 3 reasons why adaptations are important
Answer:
it will make the animal comfortable,the animal will be able to sirvive, and he has to get along with other people or animals
Explanation:
