Which one of the following statements correctly defines active site? a. The active site is a site on the enzyme molecule where specific substrate molecules bind. b. The active site is a site on the substrate molecule where specific enzyme molecules bind. c. The active site is a site on the substrate molecule where specific product molecules bind.

QUESTION POSTED AT 15/01/2020 - 01:31 AM

Answered by admin AT 15/01/2020 - 01:31 AM

The correct answer is A. #PlatoLivesMatter

Post your answer

Related questions

Muddy water contains microorganisms, clay, and silt. Which of the following statements suggests that muddy water is a suspension?

Based on my research here are the choices that I found:
A. It is a heterogenous mixture and particles settle down if left undisturbed.
B. It is a heterogenous mixture and particles do not settle down.
C. It is a homogenous mixture and particles settle down if left undisturbed.

Then the answer is 
B. It is a heterogenous mixture and particles do not settle down. 

ANSWERED AT 27/01/2020 - 01:34 AM


QUESTION POSTED AT 27/01/2020 - 01:34 AM

Question 1 (Multiple Choice Worth 2 points) During which step in the Can Crush Lab did water vapor condense inside the can? The can was filled nearly to the top with water. The can was placed on the hot stove burner for several minutes. The can was removed from the hot stove burner. The can was placed upside-down in the water-filled pan. Question 2 (Multiple Choice Worth 2 points) A river flows from approximately 45° north latitude toward the equator, as shown in the diagram below. As the water molecules in the river approach the equator, which step in the water cycle is most likely to happen next? Diagram showing a river flowing south toward the equator © 2010 FLVS The molecules cool and eventually form clouds. The molecules freeze and eventually form ice crystals. The molecules heat up and eventually form water vapor. The molecules break apart and eventually form precipitation. Question 3 (Multiple Choice Worth 2 points) Which of the following is considered a benefit to using wind energy as a source of power? Winds blow consistently. Wind energy does not pollute. Wind turbines require very little land to construct. Winds produce higher quality energy than other sources. Question 4 (Multiple Choice Worth 2 points) A meteorologist predicts that the weather in a region will soon change from clear skies to probable thunderstorms. Prior to making this prediction, what did the meteorologist most likely observe on a barometer? The barometer fell slightly. The barometer fell substantially. The barometer rose slightly. The barometer rose substantially. Question 5 (Multiple Choice Worth 2 points) The density of gas particles in a section of Earth’s atmosphere decreases. Which of the following is the most likely explanation for this event? The air pressure in that section of Earth’s atmosphere decreased. The air pressure in that section of Earth’s atmosphere increased. The total number of gas particles in Earth’s atmosphere decreased. The total number of gas particles in Earth’s atmosphere increased. Question 6 (Multiple Choice Worth 2 points) Which of the following correctly describes a way in which Earth’s atmosphere interacts with the hydrosphere? Living organisms breathe gases in the atmosphere. Water moves between Earth’s surface and the atmosphere. Gases in the atmosphere trap incoming solar radiation. Carbon cycles between sediment on Earth and the atmosphere. Question 7 (Multiple Choice Worth 2 points) Which of the following do meteorologists not typically use weather balloons to record? atmospheric pressure cloud types humidity temperature Question 8 (Multiple Choice Worth 2 points) What is the relationship between temperature and altitude in the troposphere? As altitude increases, temperature decreases. As altitude increases, temperature increases. As altitude increases, temperatures remain the same. As altitude increases, temperatures vary. Question 9 (Essay Worth 5 points) Based on your observations from the Can Crush Lab, explain why a helium balloon that rises into the atmosphere will eventually burst. Question 10 (Essay Worth 5 points) Where on Earth’s surface might you be if you are experiencing the trade winds? Explain how air pressure, temperature, and the Coriolis effect influence the movement and direction of these winds.

"1. Body composition is defined as D. ratio of muscle to fat. 2. Slow-twitch fibers are designed for D. endurance. 3. A by-product of ATP breakdown is D. ADP and phosphorous 4. A tendon is important for muscles. C. It serves as an attachment point to bone 5. Most joints in the body form B. FIRST-CLASS levers. 6. The correct statement concerning good posture is D. Good posture may help to improve balance. 7. The C. Buttocks is considered part of the pelvic girdle? 8. Fitness professionals know that good posture B. is a habit that can be learned and maintained. 9. One of the positive health-related benefits of muscular fitness is D. increased endurance during exercise. 10. The sagittal plane divides the body D. into left and right halves. 11. A normal spine appear on an x-ray B. With natural curves in the neck and lower back 12. Based on the factors of stability, A. Leg curl would be the most unstable lift 13. When you flex your arm, you're performing a/an C. CONCENTRIC contraction. 14. The three body systems that benefit from good posture are B. Digestive, circulatory, and respiratory 15. C. IRON is essential for both bone health and muscle contractions. 16. B. FASCIA is the type of tissue that covers and separates skeletal muscles, providing shape and aiding in function. 17. The most common debilitating disorder among Americans under age 45 is C. tension headaches. 18. Tension headaches usually begin in the D. neck. 19. When you sit with good posture, your spine should be A. very relaxed. 20. A/an C. NEUTRAL spine is one that allows for natural curves and arches. 21. Posture and muscular balance can usually be improved by A. exercising and stretching. 22. D. SYNOVIAL is a freely movable joint? 23. Postural muscles tend to C. WEAKEN if they aren't regularly stimulated to produce adequate force. 24. Aerobic production of ATP comes from D. CARBOHYDRATES during high-intensity training. 25. Standing on your toes is an example of D. Second class lever.

ANSWERED AT 27/01/2020 - 01:33 AM


QUESTION POSTED AT 27/01/2020 - 01:33 AM

Which statement describes the dependent variable? It is the causal variable. It is the controlled variable. It is the stimulus variable. It is the measured variable.

The statement which describes the dependent variable would be the measured variable. We usually use the independent variable and manipulate it and change its levels to see how the levels of the measurable (dependent) variable change. 

ANSWERED AT 27/01/2020 - 01:32 AM


QUESTION POSTED AT 27/01/2020 - 01:32 AM

Which statements are true of heterogeneous mixtures? 1) they settle out. 2) the proportions of solute to solvent may vary. 3) the solute is evenly distributed throughout. 4) they are composed of two solvents and two solutes. a.1 and 2 b.2 and 4 c.3 only d.2 only

The statements that are true of heterogeneous mixtures are: they settle out and the proportions of solute to solvent may vary. The correct answer is option A. 1 and 2. Heterogeneous mixtures are considered mixtures wherein the components are not uniform and still retain their properties. Characteristics of heterogeneous mixtures are: the ratio of solute and solvent is not equal, the substances can be separated physically and they still retain their properties even if mixed with another substance. 

ANSWERED AT 27/01/2020 - 12:41 AM


QUESTION POSTED AT 27/01/2020 - 12:41 AM

Scientific theory, defined?

Answer:

A scientific theory is a well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment. Such fact-supported theories are not "guesses" but reliable accounts of the real world.

Explanation:

ANSWERED AT 27/01/2020 - 12:41 AM


QUESTION POSTED AT 27/01/2020 - 12:41 AM

Which equation is correct according to ohm’s law? check all that apply. v = ir i = r/v r = i/v r = iv i = v/r

Ohm's law deals with the relation between voltage and current in an ideal conductor. It states that: Potential difference across a conductor is proportional to the current that pass through it. It is expressed as V=IR. The correct answers from the choices are:

 v = ir
i = v/r

ANSWERED AT 27/01/2020 - 12:39 AM


QUESTION POSTED AT 27/01/2020 - 12:39 AM

Which statement describes the relationship of resistance and current? resistance is directly proportional to current because r = . resistance is inversely proportional to current because r = . resistance is directly proportional to current because r = vi. resistance is inversely proportional to current because r = vi.

Well , the relationship between voltage, current , and resistance is : 

V = I . R

v = voltage
I = Current
R = Resistance

So the answer would be : Resistance is inversely proportional to current because R = V/I

hope this helps

ANSWERED AT 27/01/2020 - 12:37 AM


QUESTION POSTED AT 27/01/2020 - 12:37 AM

____ is a condition of low red blood cell production often related to low iron intake. question 43 options: diabetes acid reflux food allergies anemia

The correct answer is Anemia.

Anemia is medical condition in which the there is reduction in the number of red blood cells in the body. As red blood cells carry oxygen to the whole parts of the body. Due to reduced number of Red blood cells the working efficiency of the body is affected and body feels tired very soon. Without adequate amount of iron in the body, the body cannot make hemoglobin, as a result the body feels weaken.


ANSWERED AT 27/01/2020 - 12:31 AM


QUESTION POSTED AT 27/01/2020 - 12:31 AM

Molecules in all organisms are composed in part of radioactive carbon-14. which statement best explains the presence of carbon-14 in organisms? the radioactive isotope reacts in the same way as stable isotopes in the nuclear reactions in the body. the radioactive isotope reacts in the same way as stable isotopes in the chemical reactions in the body. the radioactive isotope reacts faster than stable isotopes in the nuclear reactions in the body. the radioactive isotope reacts faster than stable isotopes in the chemical reactions in the body.

The answer is the radioactive isotope reacts in the same way as stable isotopes in the chemical reactions in the body.

C-14 and C-12 are carbon isotopes used to measure the approximate age of organic remains. C-12 is stable, and it does not break down into other elements over time. C-14 is not stable. It breaks down into N-14. But, in the body, the radioactive isotope reacts in the same way as stable isotopes in the chemical reactions.

ANSWERED AT 27/01/2020 - 12:21 AM


QUESTION POSTED AT 27/01/2020 - 12:21 AM

Which is the first step in the dissolving process? the solute becomes like the solvent. the solute molecules are carried into the solution. the solvent molecules surround the solute particles. the solvent molecules are attracted to particles at the surface of the solute.

The answer is the solvent molecules are attracted to particles at the surface of the solute. This overcomes the lattice forces of the solute that keeps the particles together. When the solute particles begin to break apart (from the surface towards the core), the forces of attraction between the solvent molecules and the solute particles causes the solute particles to be held in the intermolecular spaces of the solvent.

ANSWERED AT 27/01/2020 - 12:21 AM


QUESTION POSTED AT 27/01/2020 - 12:21 AM

The portion of the nervous system that controls involuntary activities is a subdivision of the _______ nervous system. a. sympathetic b. peripheral c. parasympathetic d. central

Parasympathetic nerves govern involuntary actions such as pupil dilation, peristalsis, gland secretions, etc.

ANSWERED AT 26/01/2020 - 11:59 PM


QUESTION POSTED AT 26/01/2020 - 11:59 PM

These statements compare and contrast ascomycota and basidiomycota. i. some species in both groups can cause plant diseases. ii. species from both groups can be used in making bread rise. iii. all species in both groups can be used as food. iv. ascomycota produce spores in a sac-like structure; basidiomycota produce spores in a club-shaped structure. which of the statements are true?

The answer is i. and iv.

The similarity between Ascomycota and Basidiomycota is that in both groups are some species that cause plant diseases. The example of  Ascomycota is Ophiostoma ulmi causing Dutch elm disease and the example of Basidiomycota is Ustilago causing corn and wheat disease.

The difference between Ascomycota and Basidiomycota is thaAscomycotata produce spores in a sac-like structure while Basidiomycota produce spores in a club-shaped structure

ANSWERED AT 26/01/2020 - 11:31 PM


QUESTION POSTED AT 26/01/2020 - 11:31 PM

If a deep-ocean trench is located adjacent to a continent, active volcanoes would likely be found _____.

If a deep ocean trench is located adjacent to a continent, active volcanoes would likely be found landward from the trench. 

ANSWERED AT 26/01/2020 - 11:18 PM


QUESTION POSTED AT 26/01/2020 - 11:18 PM

Which autonomic system conserves energy by returning the body to a normal activity level through a lowered heart rate and blood pressure? a peripheral nervous systemb sympathetic nervous systemc somatic nervous systemd parasympathetic nervous system

The parasympathetic nervous system conserves energy as it slows down heart rate, increases intestinal and glandular activity, and relaxes the sphincter muscles of the gastrointestinal tract. It gets the nickname "rest and digest" for doing exactly so. Typically most active when sleeping, however is also the explanation for post-prandial fatigue, or being tired after eating (especially a large meal).

ANSWERED AT 26/01/2020 - 11:16 PM


QUESTION POSTED AT 26/01/2020 - 11:16 PM

Which of the following correctly organizes these genetic terms in order from smallest to largest? A:chromosome, gene, nucleotide, DNA B:nucleotide, gene, DNA, chromosome C:DNA, nucleotide, gene, chromosome D:DNA, nucleotide, chromosome, gene

The correct answer is nucleotide, genes, DNA, chromosomes or letter B. Nucleotides are composed of base pairs like adenine and thymine, 5 carbon sugar and a phosphate group which form together a DNA strand with repeated nucleotides. Chromosomes are composed of DNA strands coiled together. Chromosomes thus, contain a hundred genes. Genes are made up of DNA, it is a certain segment in the DNA which dictate a trait. 

ANSWERED AT 26/01/2020 - 10:21 PM


QUESTION POSTED AT 26/01/2020 - 10:21 PM

How does a law differ from a theory?a law is a theory that has been proven to be true and universal.a theory is a group of hypotheses that prove a law is true.a law is a statement of fact, but a theory is an explanation.a theory is a proposed law that has not yet been peer reviewed.

Answer: A law is a statement of fact, but a theory is an explanation.

Explanation:

A law is a factual statement which is based on phenomena occurring in the natural world. It holds true based on the evidences obtain after the experimental trails. It does not tell why something happens and how. It remains unchangeable and abide by the human society. But a theory provides detail explanation for the cause of a natural process. The content of the theory can vary with technology and repeated experimental trails.        

ANSWERED AT 25/01/2020 - 08:53 PM


QUESTION POSTED AT 25/01/2020 - 08:53 PM

Describe at least one advantage and one disadvantage of the production of novel proteins.

Answer:Novel proteins can be defined as the protein source by which the pets are generally not exposed. This protein generally comes from animal source but not always. Some examples are: kangaroo, duck, et cetera.

Advantage: These are used in the case of allergic reactions that is caused by the normal protein, in this case novel protein is used as the supplement.

Disadvantage: There are some health issues related by the production of protein. Some animals might be sensitive to these proteins.





ANSWERED AT 25/01/2020 - 08:48 PM


QUESTION POSTED AT 25/01/2020 - 08:48 PM

What does the enzyme reverse transcriptase do?

Makes a complimentary DNA strand from an RNA template. The process is known as reverse transcription as transcription involves DNA to RNA.

ANSWERED AT 25/01/2020 - 08:43 PM


QUESTION POSTED AT 25/01/2020 - 08:43 PM

5. Which one of the following statements does not accurately describe vibrations? A. Two bodies with the same vibration frequency that are placed next to each other will exhibit sympathetic vibrations as one body causes the other to vibrate. B. Forced vibrations, such as those between a tuning fork and a large cabinet surface, result in a much lower sound than was produced by the original vibrating body. C. Resonance occurs as a result of sympathetic vibrations. D. A non-vibrating object can begin to vibrate as a result of forced vibrations. 8. Which of the following statements is untrue in regard to sound traveling in air? A. Sound waves in the air are transverse and consist of compressions and rarefactions of air molecules. B. The area covered by the wave front increases as the wave advances, but the energy passing through a wave front in a unit of time decreases. C. During a single vibration of the diaphragm, molecules in the air near it will also complete one vibration. D. As the distance from the Earth increases, the sound wave intensity also decreases due to the lessening density. 18. Which of the following statements incorrectly describes a scenario where the source of the sound waves and the person hearing the sound are remaining stationary? A. The frequency of the sound waves is not affected by the nature of the medium. B. The frequency of the sound waves is not altering as a result of the distance between the sound source and the listener. C. The frequency of the sound waves will change for the listener as a result of the Doppler effect. D. The frequency of the sound waves will remain the same to the listener.

Answer:

5-B

8-B

18-C

Explanation:

Hello! Let's solve this!

The answers are

5- B- Forced vibrations, such as those that occur between a fretboard and a large cabinet surface, produce a much lower sound than that produced by the original vibrating body.

8- B. The area covered by the wavefront increases as the wave progresses, but the energy that passes through a wavefront in a unit of time decreases.

18- c- The frequency of the sound waves will change for the listener as a result of the Doppler effect.

The Doppler effect is a change in frequency due to a change in the source.

ANSWERED AT 25/01/2020 - 03:50 PM


QUESTION POSTED AT 25/01/2020 - 03:50 PM

Molecules made by living organisms that contain lots of carbon atoms joined together?

Macromolecules/giant molecular lattice/giant molecular structure

ANSWERED AT 25/01/2020 - 03:45 PM


QUESTION POSTED AT 25/01/2020 - 03:45 PM

Which of the following statements about change in ecosystems is true? a. Ecosystems experience change through human activity only. b. Ecosystems experience change through natural events only. c. Ecosystems experience no change. d. Ecosystems experience change through human activity and natural events.

Answer:

The correct answer would be d. Ecosystems experience change through human activity and natural events.

Ecosystem refers to a community consisted of all the living organisms (biotic component), their surroundings (abiotic component), and their interaction with each other as well as with abiotic component in a given area.

The biotic and abiotic components of an ecosystem are mainly connected through energy flows and nutrient cycles.

Both components can affect the ecosystem in positive as well as negative manner.

Thus, both human activities (such as deforestation, pollution, sustainable development), as well as natural events (such as earthquake, tsunami, forest fires), can affect the ecosystem.

ANSWERED AT 25/01/2020 - 03:20 PM


QUESTION POSTED AT 25/01/2020 - 03:20 PM

Substitutions, additions, or deletions of one or more nucleotides in the DNA molecule are called ___________. a. Genetic variations c. Recombinant DNA b. Gene mutations d. DNA fragmentation

I believe that the best answer for this question is "gene mutations." Gene mutations can either take place through nucleotide substitutions, which occur when the the sequence of nucleotides are altered. Frameshift mutations can also occur. They involve the insertion or deletion of a DNA molecule's bases. Hope this helps.

ANSWERED AT 25/01/2020 - 03:13 PM


QUESTION POSTED AT 25/01/2020 - 03:13 PM

What is semen?C an exocrine gland near the opening of the urethraO the testes located on the outside of the male bodyO a combination of sperm and other reproductive fluidsa production of fluid that gives the sperm nourishment

Answer:

A combination of sperm and other reproductive fluids.

Explanation:

  • Semen is a fluid released from the penis during ejaculation that consists of the sperms along with the fluid secretion of the seminal vesicles, bulbourethral glands, and the prostate gland.
  • The fluids secreted by the seminal vesicles and prostates glands are essential to maintain the motility of the sperm as well as maintain their viability.
  • Some of the components of the semen besides sperm are sucrose, citrate, vitamins, acid phosphatase, fibrinolysin, galactose, mucus, etc.

ANSWERED AT 25/01/2020 - 03:00 PM


QUESTION POSTED AT 25/01/2020 - 03:00 PM

Which statement best describes the role of phosphorus in the body

Phosporus is a structural component bones, teeth, DNA and RNA, and has a central role as part of the ATP and ADP which is important for our metabolisms in energy creation.

ANSWERED AT 25/01/2020 - 02:35 PM


QUESTION POSTED AT 25/01/2020 - 02:35 PM

In a molecule of water, how many electrons are shared between each hydrogen atom and an oxygen atom? A.) One B.) Two C.) Four

In water molecules there are 2 atoms of hydrogen of and 1 atom of oxygen present. each hydrogen atom shares 1 electron with the oxygen atom. So the total number of electrons shared with oxygen are 2,total no. of electrons shared by hydrogen is 2 and the total no. of electrons shared by each hydrogen atom is 1.

ANSWERED AT 25/01/2020 - 01:59 PM


QUESTION POSTED AT 25/01/2020 - 01:59 PM

Select the correct answer. Which of the following structures represents the sporophyte stage of the bryophytes? protonema antheridia capsule NextReset

Capsule.  The sporophyte projects from the gametophyte upon which it is dependent, holding the spores inside a capsule until which point the capsule bursts and the spores are spread. 

ANSWERED AT 25/01/2020 - 01:58 PM


QUESTION POSTED AT 25/01/2020 - 01:58 PM

___________ is the attraction of water molecules to one another, while _________ is the attraction of water molecules to other polar substances. A: Adhesion; cohesion B: Cohesion; adhesion C: crossed out D: Surface tension; adhesion

Answer:

The answer is Cohesion;adhesion

Explanation:

Cohesion means attracted to one another.Adhesion means attracted to the polar substances.

ANSWERED AT 25/01/2020 - 01:54 PM


QUESTION POSTED AT 25/01/2020 - 01:54 PM

Which essential nutrients does the body MOST need in order to build molecules within cells? a. fats b. proteins c. minerals d. carbohydrates

B. Proteins
Hence why body builds drink protein shakes in order to build muscle.

ANSWERED AT 25/01/2020 - 01:47 PM


QUESTION POSTED AT 25/01/2020 - 01:47 PM