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Which of the following is true regarding enzymes?
Choose 1 answer:
Choose 1 answer:
(Choice A)
A
Enzymes can only be used once during a reaction.
(Choice B)
B
Enzymes are reusable.
(Choice C)
C
Enzymes are usually carbohydrates.
(Choice D)
D
Enzymes denature at their optimum temperatures.
Answers
Answer:
I believe the answer is B
Explanation:
An element with 5 protons, 6 neutrons, and 8 electrons has an atomic number of Group of answer choices
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The mass number of an element is the sum of the protons and neutrons. The number of neutrons for a given element is the only number that can change and still have the identity of the element stay the same, (because the atomic number is the number of protons). In this case the mass number would be 11
In which step of mitosis does a new nuclear membrane form around each new nucleus? O telophase prophase metaphase anaphase
Answers
Answer:
Telophase
Explanation:
is the final step of mitosis. During this phase, the nuclear membrane reforms, the nucleolus reappears, and the chromosomes unravel into chromatin.
ATP is produced in all stages of cellular respiration. Which two statements describe the process of ATP synthesis in the electron transport chain?
A. The ATP synthase spins when the hydrogen ions rush past, acting as a "matchmaker" and grabbing another phosphate group to attach to an ADP molecule.
B. The high concentration of NAD+ acts as a catalyst to speed up the formation of ATP from ADP.
C. The high concentration of hydrogen ions in the intermembrane space allows them to diffuse across the membrane into the matrix.
D. The FADH2 synthase spins as the high-energy electrons rush past, synthesizing ATP from ADP.
Answers
Answer:
C. The high concentration of hydrogen ions in the intermembrane
Explanation:
Merry Christmas
The two statements that describe the process of ATP synthesis in the electron transport chain are: "ATP synthase spins when the hydrogen ions rush past, and high concentrations of hydrogen ions in the intermembrane space allow them to diffuse." These are options A and C.
What is the significance of the hydrogen in the electron transport chain?In this electron transport chain process of cellular respiration, electrons are passed from molecule to molecule through a series of protein complexes in the inner membrane of the mitochondria, where ATP synthase is an enzyme located in the inner membrane that makes ADP into ATP.
Hence, the two statements that describe the process of ATP synthesis in the electron transport chain are: "ATP synthase spins when the hydrogen ions rush past, and high concentrations of hydrogen ions in the intermembrane space allow them to diffuse." These are options A and C.
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Does an animal cell have a cell wall?
Answers
Answer:Plant cells have a cell wall, as well as a cell membrane. In plants, the cell wall surrounds the cell membrane. This gives the plant cell its unique rectangular shape. Animal cells simply have a cell membrane, but no cell wall
Explanation:
Answer:
No
Explanation:
Animal cells have cell membranes, but not cell walls. Cell walls are much more structured and are only present in plant cells who also have a cell membrane.
5. The following cell structures are located within cells that make proteins. Which description
best explains the relationship among these cell structures in making a protein?
nucleus
• ribosome
• endoplasmic reticulum (ER)
A. nucleus makes protein → protein winds through the ER → protein folds into active shape
B. nucleus directs ER to assemble the protein → ribosomes surround protein → protein
folds into its active shape
C. ER creates protein → DNA in the nucleus codes for ribosomes to surround protein →
protein folds into its active shape
D. DNA in nucleus codes for protein protein assembled in ribosomes and moves to ER →
protein folds into its active shape
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Answer:it’s d
Explanation:
DNA in nucleus codes for protein protein assembled in ribosomes and moves to ER →protein folds into its active shape best explains the relationship among these cell structures in making a protein.
What are the functions of DNA?Deoxyribonucleic acid is a polymer composed of two polynucleotide chains that coil around each other to form a double helix.
There are four nucleotides, or bases, in DNA: adenine (A), cytosine (C), guanine (G), and thymine (T).
The polymer carries genetic instructions for the development, functioning, growth and reproduction of all known organisms and many viruses. DNA and ribonucleic acid are nucleic acids.
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The most common cause of biliary ductal obstruction is the presence of ductal. Cyst. Tumor. Stone. Stricture.
Answers
Answer:
tumor
Explanation:
Which statement is true?(1 point) The Calvin cycle is the light-independent stage of photosynthesis and occurs in the thylakoid membrane. The Calvin cycle is the light-dependent stage of photosynthesis and occurs in the stroma. The Calvin cycle is the light-dependent stage of photosynthesis and occurs in the thylakoid membrane. The Calvin cycle is the light-independent stage of photosynthesis and occurs in the stroma.
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The true statement about calvin cycle is "The Calvin cycle is the light-independent stage of photosynthesis and it occurs in the stroma"
Photosynthesis is generally the process whereby cells of autotrophic organisms obtain their food in form of sugars in the presence of sunlight. The photosynthetic process occurs in two stages namely: light dependent and light independent stage. The light dependent stage is the first stage, which occurs in the thylakoid membrane of the chloroplast. In this stage, ATP and NADPH is produced for the second stage.LIGHT INDEPENDENT STAGE is also known as CALVIN CYCLE. It is so called because it does not need light to occur. This stage occurs in the STROMA, where the glucose is synthesized.Therefore, the true statement about calvin cycle is "The Calvin cycle is the light-independent stage of photosynthesis and it occurs in the stroma"Learn more at: https://brainly.com/question/17600594?referrer=searchResults
Answer:
For connexus students: Cell Work Unit Test
Explanation:
1. 12
2. Chlorophyll breaks down because there's less sunlight.
3. The Calvin-Cycle is light independent (does not need sunlight)
4. light
5. C6 H12 O6 + 6O2 + 6H2O + energy
6. Pyruvic Acid+ NADH --> Lactic Acid+ NAD+
7. Acetyl-CoA joins with a large molecule called oxaloacetic acid
8.Electrolosis
9. ATP
10. Krebs Cycle
11. Oxygen
12. 12
13. Ectotherms cannot insulate- and can only control their body temperature by choice.
14. Shivering
Which best identifies a function of carbohydrates? chool production of antibodies source of energy building of a cell development of hormones
A. production of antibodies
B. source of energy
C. building of a cell
D. development of hormones
Answers
Answer:c
Explanation:
I said soo
 what is the volume of a spear with a radius of 7
Answers
Answer:The volume of a sphere whose radius is 7 cm is V = (4/3)*(pi)*r^3 or V = (28/21)^7^3 = 457.3333 cc.
Explanation: Your Welcome!
Why is carbon so useful in building organic molecules?
Answers
Answer: Carbon is the basis for the organic molecules that constitute life because it can form multiple strong bonds with itself and with other elements.
Explanation:
The increasing demands for fossil fuels has led governments and businesses to
consider several possibilities to solve the energy crisis. Which solution will reduce the
impact of this crisis on the environment and future generations?
(1) increase the number of drilling sites for crude oil in North America
(2) build more power plants away from population centers
(3) limit the number of people in each vehicle
(4) develop alternative fuel sources that can be produced from renewable
resources
Answers
The rise of fossil fuels demands various nations has created problems for the government to meet the increasing supplies as fossil fuels are fast depleting and heavily pollute the environment at large.
The government is trying to build more alternative fuel sources and produce some renewable resources in case of fossil fuels get depleted completely.Hence the option 4 is correct.
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What is the primary source of energy that flows through food webs?
Group of answer choices
sun
herbivores
consumers
decomposers
Answers
Answer:
Sun
Explanation:
The sun sends out energy to plants then herbivores eat the plants
Explanation:
Trust me
Pay attention to what happens to the things around you as you go about
your day. Describe three examples of Newton's third law in action (use
different ones from those described in the lesson). In your examples
describe the action and the equal and opposite reaction.
Answers
Answer:
Examples of Newton's third law of motion are ubiquitous in everyday life. For example, when you jump, your legs apply a force to the ground, and the ground applies and equal and opposite reaction force that propels you into the air. Engineers apply Newton's third law when designing rockets and other projectile devices. Two other examples are: As a professor paces in front of a whiteboard, he exerts a force backward on the floor. A car accelerates forward because the ground pushes forward on the drive wheels, in reaction to the drive wheels pushing backward on the ground.
Explanation:
When calcium levels in the blood are too low, the body releases a hormone that removes calcium from the bones. A
person who suffers from a certain type of thyroid disease will often have low blood calcium and brittle bones because
the body is taking the calcium from the bones. The afflicted person will typically see an endocrinologist, who studies
hormones, and an orthopedist, who studies bones. What do these two doctors have in common?
A) They both focus on hormone levels.
B) They both focus on bone density.
C) They both focus on calcium levels.
D) They both focus on the thyroid.
Answers
Answer:
they both focus on calcium levels
Explanation:
on edge
These two doctors have in common is :
C) They both focus on calcium levels.
DoctorsAn Endocrinologist is a doctor who has extraordinary preparing in diagnosing and treating clutters of the endocrine framework (the organs and organs that make hormones). These disarranges incorporate diabetes, barrenness, and thyroid, adrenal, and pituitary organ issues.
An orthopedist a specialist who specializes within the department of medication concerned with the adjustment or avoidance of distortions, disarranges, or wounds of the skeleton and related structures An orthopedist treated her knee damage.
These two doctors have in common is that they both focus on calcium levels.
Thus, the correct answer is C.
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An inherited trait that improves the chances of survival and reproduction for a living organism is _______________________.
Answers
Answer:
Adapting
Explanation:
Adapting is when the organism slowly changes as each generation goes by because the organism more suited for the environment is going to survive and reproduce while others will have a harder time and more than likely die off.
I need help asap please help
Answers
Answer:
The answer is A
Explanation:
Less genetical diversion isnt good
why is dowry system a social problem
Answers
women and girls in India and other nearby countries where dowry is still prevalent. Dowry can put great financial burden on low income families. Often times, instead of being a gift, it more of a demand from bridegroom's family.
Dowry system can also lead to many unwanted situations
Answer:
Dowry system is one of the contributing factors toward social problems that effects women and girls in India and other nearby countries where dowry is still prevalent. But however, families with low income or under the poverty line, dowry is a huge problem. Dowry can put great financial burden on low income families.
An egg, a model of a cell, is placed in a concentrated sugar solution (hypertonic) for 24 hours.
What will happen to the egg? The egg will
1. lose mass and shrink in size
2. gain mass and increase in size.
3. stay the same mass and size.
Answers
Answer:
gain mass and increase in size
Answer:
1. lose mass and shrink in size
Explanation
the egg is a more dilute solution that the one it is placed in. Through osmosis it will lose water until both solution(the inside and outside of the egg) have roughly the same concentrations. Losing water will cause it to shrink.
A certain species of fish (A) preys on a smaller species of fish (B). The smaller species of fish mostly consumes seaweed. What would be the effect of overfishing species A? If species A is overfished, then the drop in population of species A will have a(n) (direct, indirect or cascading) effect on the population of species B. The population of species B will increase. A(n) (direct, indirect, or cascading) effect of overfishing would be a drop in seaweed, because the larger population of species B would consume more seaweed.
Answers
Answer:
B. The population of species B will increase, A(n) (direct, indirect, or cascading) effect of overfishing would be a drop in seaweed, because the larger population of species B would consume more seaweed.
Explanation:
As population of Fish A is directly dependent on population of fish B and population of fish B is dependent on seaweed. Overfishing of species A will have a direct effect on species B and population of species B will increase as there will be less predator (species A).
Due to overfishing of species A resulting into increase in species B, there will be an indirect drop in the seaweed, because the larger population of species B would consume more seaweed.
Hence, the correct answer is "B".
Many plants have waxy coatings on some surfaces. This coating reduces water loss because it is not water-permeable. This waxy coating is which of the following types of organic molecule?
Answers
Answer: Chemically, it consists of hydrophobic organic compounds, mainly straight-chain aliphatic hydrocarbons with or without a variety of substituted functional groups. The main functions of the epicuticular wax are to decrease surface wetting and moisture loss.
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Which statement best describes the energy flow as it passes from producers to tertiary consumers?
A. 10% of the energy is transferred through each trophic level.
B. 100% of the energy produced passes to each trophic level.
C. 50% of the energy produced is transferred through each trophic level.
D. 1% of the energy is lost as heat is transferred through each trophic level.
Answers
Answer:
The answer is A
Explanation:
At any given trophic level, only 10% of the energy is transmitted to the next level; the remaining 90% is primarily wasted as heat during metabolic activities. Thus, option A is correct.
What is the role of energy flow in an ecosystem?Typically, only 10% of energy is transmitted from one trophic level to the next. This restriction on the number of trophic levels that an ecosystem may support is referred to as “the 10% rule.” organisms that are alive and the energy they hold.
Each trophic level's energy content diminishes as it progresses through an ecosystem.
The 10% Rule states that only 10% of the energy will be transferred when it moves from one trophic level to the next in an ecosystem.
Therefore, An energy pyramid provides a graphic representation of energy loss at each level of the feeding stages of species in an ecosystem.
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Which method best describes how a homeothermic organism maintains a constant internal temperature, despite changes in its external environment? (4 points)
A. Using negative feedback to decrease its external temperature when it rises above its normal range
B. Using negative feedback to increase its internal temperature when it falls below its normal range
C. Using positive feedback to decrease its internal temperature when it rises above its normal range
D. Using positive feedback to increase its external temperature when it falls below its normal range
Answers
Answer:
A
Explanation:
Yes
Answer:
B. Using negative feedback to increase its internal temperature when it falls below its normal range
Explanation:
The question asked about INTERNAL temp and how its stbalized, we know that MOST to ALL of negative feedback is getting the organism to return to its original state, high body temp was its original state, therfore,Using negative feedback to increase its internal temperature when it falls below its normal range, is the correct answer.
Who defined the term 'population education for the first time?
Answers
Answer:
Professor Solar Wayland
How would a small, uncharged lipid move across the cell membrane?
o through simple diffusion, down the concentration gradient
O through simple diffusion, against the concentration gradient
o through facilitated diffusion, down the concentration gradient
O through facilitated diffusion, against the concentration gradient
Answers
Answer:
Through simple diffusion, down the concentration gradient.
Explanation:
The phospholipids of the membrane are amphipathic with hydrophillic heads and hydrophobic tails. Other polar molecules cannot go through this hydrophobic interior. Since small uncharged lipids are non polar and hydrohobic, they are able to go through the membrane without the help of transport proteins. Therefore, the last two options can be ruled out because facilitated diffusion includes the use of a protein. Diffusion involves molecules moving down the concentration gradient so the second option can be ruled out.
Which element in period 3 on the periodic table is a metalloid?
Answers
magnesium (mg) aluminum (al) silicon (si) sulfur (s)
Answer:
C.) Silicon is a metalloid
Explanation:
edg 2021
What type of organisms are most likely to be found as fossils?
Answers
Organisms with hard body parts such as a mineralized shell are much more likely to become fossilized as har parts are not fed by scavengers.
Types of organisms that are most likely to be found in the fossils have completely made up of hard bodies or at least some hard body parts.
The deposit of sediments and the finer the sediment deposited the likelier fossilization is to occurThe hard parts of organisms, for instance, bones, and teeth have had becoming fossils.Scavengers normally leave such hard parts, however, they also decay with time but this gives more time to be buried in sediments.These hards parts have better chances than the organisms with soft body parts to be found in fossils.
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name the device that helps you to maintain potential difference across a conductor
Answers
Answer:
battery
Explanation:
Any source of electricity, the battery, or the power supply is there to maintain the potential difference across a conductor.
To measure this difference we use VOLTMETER - Instrument for measuring potential differences, voltage differences. It is called a voltmeter as it allows the measurement of the potential difference or voltage that exists between two points belonging to an electrical circuit. The voltmeter, therefore, detects the voltage.
MCO,
Name the acids present in unripe green apple
1. Malic acid
2. Tannic acid
3. citric acid
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How does the uncontrolled cellular division result in cancer cells?
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