Answer:
d. Phosphorylation by ATP, which turns the complex off, and dephosphorylation, which turns the complex on
Explanation:
Pyruvate dehydrogenase complex (PDC) is a complex enzymes which is responsible for the conversion of pyruvate into acetyl-CoA, NADH and CO2 through oxidative decarboxylation.
Pyruvate dehydrogenase is one of the main component of PDC that catalyze conversion of pyruvate to acetyl-CoA. Pyruvate dehydrogenase (PDH) enzymes is first modified by covalent modification in the pyruvate dehydrogenase complex. Pyruvate dehydrogenase kinase undergo phosphorylation with ATP and inactivates PDH which turns the complex off. then the pyruvate dehydrogenase phosphatase support dephophorylation which turns the complex ON.
Hence, the correct option is d.
Which of the following is an example of conduction?
A. The sun heating the ground
B. The ground heating the air
C. The hot air rising and cold air falling
Answer:
C
Explanation:
In conduction, heat moves from areas of more heat to areas of less heat by direct contact. In the atmosphere, conduction is more effective at lower altitudes where air density is higher.
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Hope this answer can help you. Have a nice day!
If all of the red squirrels were diseased and died off what would happen to this food web?
Jaden’s mass is 50 kilograms. His weight on Earth is
Answer:
Weight of the Jaden on earth is 490 N.
Explanation:
Formula
w = mg
Where w is the weight of an object , m is the mass of an object and g is acceleration of gravity .
Gravity on Earth is 9.8 m/s² .
Jaden’s mass is 50 kilograms.
g = 9.8 m /s²
m = 50
Put the values in the formula
Thus
w = 50 × 9.8
= 490 kg m /s²
(As N = kg m/ s²)
= 490 N
Therefore the weight of the Jaden on earth is 490 N.
Select the correct answer.
Why are kelp and seagrass not found in deep oceanic water?
Answer:
There is no sunlight/light in deep ocean waters, therefore the plants cannot grow.
Explanation:
Answer:
B) There’s no availability of sunlight
Explanation:
I just took a test with this question on it and got it right.
Hope this helps! :)
Which of the following explains one of the ways plants and animals depend on each other?
A
Animals make minerals, which plants take in through their roots and pass up to their stems.
B
Animals release water vapor when they breathe, which plants take in through their leaves.
C
Animals make their own food, which plants take in through their roots and pass to their leaves.
D
Animals release carbon dioxide when they breathe, which plants take in to help make food.
Answer:
Animals release carbon dioxide when they breathe which plants take in to help make food
Animals release carbon dioxide when they breathe which plants take in to help make food. So the correct option is D.
Why do animals and plants depend on each other?
All species present on earth depend on each other for performing basic life processes. Humans are not able to survive beyond a particular range of temperature and pressure. For all the species to survive, a healthy environment is required.
Plants and animals are dependent on each other. This is because, in ecological systems, no species can survive alone. Animals are dependent on plants. Plants are the primary producers in our ecosystem. They produce food that is consumed by primary consumers and the primary consumers are consumed by secondary consumers.
Plants use carbon dioxide for photosynthesis and it results in the production of oxygen. This is used by animals for the process of respiration.
Plants depend on animals for several reasons. These can be fruit and seed dispersal, pollination, and also for the carbon dioxide that the animals produce. Thus, both plants and animals are interdependent on each other.
Therefore, the correct option is D.
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In simplest form what is RNA and how is it different from DNA?
In any food web, plants are considered to be producers. They convert sunlight (solar energy) into usable chemical energy (glucose).
When we eat plants our bodies are using that chemical energy. What elements are rearranged to make glucose in plants?
Answer:
6 carbon atoms, 12 hydrogen atoms, and six oxygen atoms
If, after adding those channels, you were to wait long enough for the system to equilibrate (i.e., reach a stable state in which the number and type of molecule in each compartment no longer changes much over time), about how many peptide molecules would you expect to find on the left side of the cell and how many on the right? How about the water molecules? Explain your reasoning.
Answer:
1 We can infer that when permeable channels are added to the peptides and a cell is incorporated in water, the concentration of peptides and water will change, generating an equilibrium causing an equivalence of equal intracellular and extracellular concentration
2. If there is no alteration and the environment is in equilibrium, we can say that there will be an equal concentration of petids and water in the intracellular and extracellular space. If we have 40 peptides on the left side, the right side will move looking for a balance and that both environments are the same, becoming 60 for each of the spaces
Although your question has some missing details a general answer is provided above
After adding the channels to a system to achieve equilibrium the number of peptide molecules on both sides of the cell have to be equal.
A difference in the peptide molecules on either side of the cell will lead to a diffusion gradient and this will lead to diffusion of peptide molecules from the side with higher concentration of peptide molecules to the side with lower concentration of peptide molecules ( this means that the system is not at a stable state ). while
A difference in the concentration of the water molecules will lead to an osmotic gradient ( this means the system is not at a stable state ).
Hence we can conclude that for the system to reach a stable state the number of peptide molecules and the water molecules on both sides of the cell should be equal.
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what opposes the sliding motion of two
surfaces that are in contact.
Answer:
Friction: A force that opposes the motion of objects that touch as they move past each other. Friction acts at the surface where objects are in contact.
Explanation:
The force that acts against your pushing force is called friction. is a force that resists the motion between two surfaces in contact. When you try to slide two surfaces across each other, the force of friction resists the sliding motion.
Which the following is not and intertidal area? A. Marsh B. Coral reef C. Rocky Shore D. Estuary
Answer:
B. Coral reef
You prepare an agar plate by spread plating & place an antibiotic disk in the middle of the plate. After incubating for a day at 37 degrees C, there are no bacteria on the plate. Which of the following is NOT a reasonable interpretation of what might have happened?
O The bacteria in the culture tube were already dead when you made the plate
O The medium used was defective and provided no nutrition for the bacteria
O The bacteria grew all over the plate but were then killed by the antibiotic
O The spreading tool was too hot when spreading the bacteria
Answer:
A.The bacteria in the culture tube were already dead when you made the plate
Explanation:
Antibiotics are the chemical substance used to kill or stop the growth of bacteria and some other microorganism.
Antibiotics are added to agar plate during experiment for the selection of only those bacteria with resistance to that antibiotic.
There can be several interpretation for the absence of bacteria such as:
The bacteria grows on the nutrients in the medium but due to defective medium they were unable to grow and die.It may also happen bacteria might have grown in all over the plate but due to the action of antibiotic, all the bacteria got killed.Tool used for spreading might kill bacteria as it was hot and bacteria may not be able to tolerate the excessive heat and die.Hence, the only not reasonable interpretation is bacteria in the culture tube were already dead when you made the plate.
So, the correct option is A.
What is a natural selection?
A. A process that happens in the absence of environmental conditions.
B. A single process of adaptation within an individual
C. The survival of the fittest
D. An ability to predict the outcome of a defined species over time.
Answer:
a
Explanation:
what is the importance of the folds and grooves of on the surface of the cerebrum
How does the impact of disease in a stressed reef compare to the impact of disease in a healthy reef?
Answer:
stressed reef will loose photosynthesis and fail to bear fruits compared to a healthy reef that produces bitter fruts
Based on Kepler's observations about planetary motion, what is the relationship between a planet's orbital velocity and its distance from the sun?
Answer is the greater the distance, the slower the orbital velocity..
I do not understand it. Can someone please explain it to me? Thank you!
Answer:
Explanation:
The closer the planet is to the sun,the faster it moves because the suns gravitational pull is stronger.The answer tells you that the greater the distance,the slower the planet will rotate
Kepler laws of planetary motion can be stated as planets move around the sun in elliptical orbits, the radi joins the planets to sun leaves out equal areas to equal intervals in the equal lengths of time.
The planets that are farther away from the sun have slow velocity and longer paths such as pluto. These factors make it longer for one complete revolution.Thus greater will be the distance the slower will be the velocity of movement such as that of mercury and pluto. As sun gravitational pull will be weaker.Learn more about the Kepler's observations about planetary motion.
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Conservationistis strive to preserve or improve biodiversity in ecosystems, which includes monitoring populations of organisms to detect changes. Name two challenges that scientists may encounter when they’re monitoring populations of organisms in the wild.
Answer:
Conservationists are responsible to preserve or improve the biodiversity in ecosystem. Many wildlife sanctuaries are made to protect the biodiversity. There are several ways by which conservationists accomplish their aim such as monitoring populations of organisms to detect changes and promoting importnce of wildlife.
Two main challenges conservationists will face while monitoring population of organisms in wild are:
weather conditions may not support the monitoring equipments or clothing.Wildlife animals are dangerous and can cause harm.Hence, conservationists face the above challenges while dealing with wild.
Answer:
One challenge is cost. To effectively monitor populations in the wild, scientists need special equipment such as cameras, computers, and GPS monitoring equipment. Another challenge is accuracy. It’s impossible to count every single organism in an ecosystem, so scientists often work with estimates.
Explanation:
Darwin would probably say that Rudolph the Red Nosed Reindeer was the first reindeer to have a red
nose as a result of:
Answer:
genetic mutation
Explanation:
the first of any trait is due to some form of mutation, whether it may be in the DNA or chromosomes as a whole.
How much exercise is recommended for children?
A 60 minutes or more of moderate to vigorous exercise every day
B 45-60 minutes of moderate to vigorous exercise every other day
C 10-20 minutes of vigorous exercise every day
D20-30 minutes of moderate to vigorous exercise every day
Answer:
A. 60 minutes or more of moderate to vigorous exercise every day
Describe the microscopic structures you would expect to see in the lungs.
Answer:
Alveoli
Explain:
They are the workhorses of your respiratory system. You have about 480 million alveoli, located at the end of bronchial tubes. When you breathe in, the alveoli expand to take in oxygen. When you breathe out, the alveoli shrink to expel carbon dioxide.
Why is it incorrect to say plants “breathe” Carbon dioxide (CO
Answer:
Becoz as we know that human being breathe oxygen and through carbon dioxide. Like wise it's opposite to plants. So it's incorrect to say that plant breathe carbondioxide.
Plant species A cannot fight most fungal infections, while plant species B makes a protein that kills many fungi.
What is one possible way for humans to engineer species A plants that can produce the fungus-killing protein?
Answer:They can insert the gene for the protein from species B into a chromosome in species A.
Explanation:
The one possible way for human to engineer species should be that it should insert the gene for the protein.
What is fungal infections?It is known as the mycosis that represent the disease on the skin that should be caused by the fungus. There are various kind of species of fungi. It should be lived on dirt, on plants, or the surface on the household and even on the skin. It would leads into the rashes or bumps in the skin problem
Therefore, The one possible way for human to engineer species should be that it should insert the gene for the protein.
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Anya and Greg are working in their research laboratory. Anya tells Greg that one of the mice has a 50% probability of having the alleles DD and a 50% probability of having the alleles Dd. How can Anya explain her reasoning? In two out of 50 times, the mouse has the alleles DD or Dd. The probability that the mouse has the alleles DD is equal to the probability that it has the alleles Dd. The mouse is twice as likely to have the alleles DD than it is to have the alleles Dd. There are two more possible outcomes besides the mouse having DD or Dd alleles.
Answer:
Option B: The probability that the mouse has the alleles DD is equal to the probability that it has the alleles Dd.
Explanation:
Anya tells Greg that one of the mice has a 50% probability of having the alleles DD and a 50% probability of having the alleles Dd.
She can explain her reasoning by saying that both pairs of alleles (DD and Dd) has equal chance of being expressed i e, the probability that the mouse has the alleles DD is equal to the probability that it has the alleles Dd. Both pairs each has 0.5 chance of occuring.
Answer:
Explanation:
A Dominant Allele is an Allele that express itself.
DD- this represent a dominant homozygous allele
Dd- represent a dominant heterozygous allele
When an individual with DD is crossed with Dd we will have DD,Dd,DD,Dd
Phenotypic ratio is 2:2
i.e homozgous dominant crosses with heterozygous dominant
which means both DD and Dd have 50% chance of occuring in the genotype and the probabality is the same.
Note that in the phenotype of an individual with homozygous dominant (DD) is the same phenotype with heterozygous dominant(Dd)
A biologist wants to know which fertilizer will result in the tallest pea plants. A chemist wants to know how much energy is required to change liquid water into water vapor. A geologist wants to know which type of soil is most permeable to water. A physicist wants to know what type of material reflects the most light.
Which of the following methods can best be used by all of these different scientists to answer their individual questions?
A.
taking a survey of their fellow researchers
B.
drawing a diagram as a model
C.
using popular magazines as reference materials
D.
performing a controlled experiment
Answer:
performing a controled experiment
Explanation:
this is because they can experience it themselcves, without having risk of external disturbance that would change tha outcome
Answer:
The answer is D - performing a controlled experiment
Explanation:
Wildfires are _____.
Answer:
C
Explanation:
I think it is C I hope this helps!
Learning the rights, obligations, and expectations of a role to prepare for assuming that role in the future. ???
Answer:
Explanation: Anticipatory socialization involves learning the rights, obligations, and expectations of a role to prepare for assuming that particular role in the future
The process of learning the rights, obligations, and expectations of a role to prepare for assuming that role in the future is known as anticipatory socialization.
What is socialization?The term socialization refers to the rigorous process of acquiring the behavior pattern that enables a person to perfectly fit into the society of which he/she is an integral part of.
The term anticipatory socialization refers to the learning of the rights, obligations, and expectations of a role to prepare for assuming that role in the future.
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Which of the following would not be found in a prokaryotic cell?
Answer:
C) mitochondria.
Explanation:
All prokaryotic cells do not have membrane-bound organelles. In the case of mitochondria, however, it has a double membrane. It itself was originally a prokaryotic cell, but it evolved into an organelle.
A: Prokaryotic cells do glycolysis in which a net of 2 ATP's are produced, 2 NADHs are yielded, as well as 2 pyruvate.
B: Ribosomes are not membrane-bound and thus found in prokaryotse.
C: N/A.
D: Cytosol is most definitely found in prokaryotes; it's the jelly-like fluid that surrounds the organelles inside the cells.
E: Yes, prokaryotic cells have plasma membranes.
Why are stems considered to have a small role in photosynthesis while roots are not?
Roots are the main source of absorption and make the plant survive. Both the stem and roots. Xylem is founded in both stem and roots.
A region with a variety of organisms like tiger, fish, rabbits, birds, insects, etc.,
have a high level of
genetic diversity
species diversity
ecosystem diversity
none
Answer:
Species diversity is the right answer.
Explanation:
It is stated that the region is full of different organisms. An organism is defined as an individual animal, plant, or single-celled life form. All this variety of a region makes an ecosystem so having multiple ecosystems in a specific region is out of hand.
What is the lowest starting height from which the skater can start to successfully complete the ramp? Use the data from your chosen ramp design from the “Testing” section of the lab. Be sure to include if your results support your hypothesis.
Answer:
The lowest starting height the skater can be so that he complete the loop is 6 meters.
Explanation:
Answer:
mine was 8 but it might be 6
Explanation:
Materials such as minerals, soil, fuels, and clean water are called
O natural resources
bio-elements
O habitats
O non of the above
Answer: natural resources
Explanation:
