Which one of the following statements holds true for the induced-fit model? a. Once the enzyme binds to the specific substrate molecule, no structural changes can occur in the active site of the enzyme. b. Once the enzyme binds to the specific substrate molecule, structural changes can occur in the active site to accomodate the product. c. Once the enzyme binds to a specific substrate molecule, subtle structure changes occur in the active site, which are reverted when the reaction is over.

QUESTION POSTED AT 14/01/2020 - 03:06 PM

Answered by admin AT 14/01/2020 - 03:06 PM

C. once the substrates bind to the enzyme, the active site of the enzyme changes, to the shape of the substrate. Once the product detaches from the enzyme, then the active site returns to it's normal shape
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Related questions

Water is the most abundant molecule found in living organisms. Most mammals, in fact, are approximately 70% water by weight. About two-thirds of this water is present inside cells. The other one-third is present outside cells (e.g., in blood plasma or other body fluids). Why is water so important to cells?. . A.Water determines which proteins are translated from the cellular DNA.. . B.Water is stored in the cells to be used when the organism gets thirsty.. . C. Almost all the chemical reactions in life processes occur in solutions with water.

The answer is letter C. Almost all the chemical reactions in life processes occur in solutions with water.

Water is known to be the universal solvent. Because of its high polarity, it can easily dissolve and bond with other solutes. It makes it easier for the chemical process that is happening inside the body

ANSWERED AT 21/01/2020 - 10:37 AM


QUESTION POSTED AT 21/01/2020 - 10:37 AM

Cells lining the small intestine absorb glucose. Which of the following is required to transport glucose molecules across the cell membranes of the intestine?. A:ATP to bind the glucose molecules . B:ATP to start the process . C:ADP to break down the glucose molecules

Transporting molecules through a membrane against their concentration gradient is called active transport. It needs a transporter (protein) and energy (ATP). ATP doesn't bind to the glucose molecules, the transporter does. Also the glucose isn't broken down So the only correct answer is B :)

ANSWERED AT 21/01/2020 - 10:35 AM


QUESTION POSTED AT 21/01/2020 - 10:35 AM

How do products of photosynthesis reach the other parts of the plant body?. Select one of the options below as your answer: . A. Xylem transport . B. Phloem transport . C. Transpiration

Answer: Option B

Explanation:

The phloem transports the food(glucose) to the various parts of the body.

The food is transported from the leaves to other parts of the plant so that every cell of the plant body can perform its function.

The water and mineral is supplied from the soil by xylem tissue to plants. The cells present in the leaves perform photosynthesis and the glucose produced is transported to other parts of the plant.

ANSWERED AT 21/01/2020 - 10:33 AM


QUESTION POSTED AT 21/01/2020 - 10:33 AM

It is advantageous for a predator to prey exclusively on a single prey species. True or False

False.

This would cause species to be endangered. When a predator preys on a single prey, it might end up to over-hunting. This will cause a domino effect, if there are no more preys in the area, there is also a big tendency that the predators will die because of the lack of preys in the area, which will eventually lead to extinction of both species.

ANSWERED AT 21/01/2020 - 10:33 AM


QUESTION POSTED AT 21/01/2020 - 10:33 AM

Pat wants to observe mitotic cell division in an onion plant. Which part of the plant body is most suitable for this activity and why?.

The most suitable part of the onion for observation of mitotic cell division is its root tips. The onion root tips are a rapidly growing part of the onion. Because of rapid cell division, many cells in this part undergo mitosis.

ANSWERED AT 21/01/2020 - 10:31 AM


QUESTION POSTED AT 21/01/2020 - 10:31 AM

Enzymes are proteins that speed up reactions by providing an additional energy source supplying additional molecules for the reaction removing inhibitors that slow down reactions lowering the amount of energy required

Lowering the energy required

Enzymes are biological catalyst or chemical reactants that can speed up rate of reaction between the substances without them being affected by it. They play a vital role in bodily functions like digestion. Enzymes and co-enzymes would often work together in order to create a fermentation process in the body

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


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

Which of these animals is considered a model for punctuated equilibrium?

Ammonites

Ammonites are squid like creatures that are named after the Egyptian god, Ammon. This extinct creature is an example of the punctuated equilibrium. Ammonites are the ancestors of the cephalopods. These creatures also came from the bactries. In the punctuated equilibrium, the ammonites have shown that they were able to evolve thru cladogenesis.

ANSWERED AT 21/01/2020 - 10:25 AM


QUESTION POSTED AT 21/01/2020 - 10:25 AM

Cell division occurs in two main stages, the second of which is called __________. a. mitosis b. binary fission c. cytokinesis d. subdivision

Cell division occurs in two main stages namely meiosis and mitosis. The mitosis has several phases namely Prophase, Prometaphase (sometimes considered part of prophase), Metaphase, Anaphase, Telophase and Cytokinesis. During the mitosis stage the chromosomes are duplicated and are aligned, separated and moved into new and identical daughter cells.

ANSWERED AT 21/01/2020 - 10:24 AM


QUESTION POSTED AT 21/01/2020 - 10:24 AM

Measuring electrical activity of the brain over time is done using __________. a. PET scans b. EEGs c. MRIs d. CT scans

Answer: The correct answer for the fill in the blank is B) EEGs.

EEG stands for Electroencephalogram, which is a test used for recording electrical activity of the brain. In this test, electrodes are placed along the scalp, which are used to detect the voltage fluctuations within the neurons of the brain that are produced because of ionic currents.

It is generally used to diagnose any abnormality related to brain like Epilepsy, sleep disorders.


ANSWERED AT 21/01/2020 - 10:21 AM


QUESTION POSTED AT 21/01/2020 - 10:21 AM

Which of the following monomers vary based on the structure of their side chains?. . Fatty acids. . Monosaccharides. . Nucleotides. . Amino acids. . What type of molecule is represented by the model below?. . -A molecule made up of four carbon rings with other atoms bonded to those rings-. . A.Fat. . B.Carbohydrate. . C.Steroid. . . D.Protein

1. Which of the following monomers varies based on the structure of their side chains, the correct answer is Amino acids.


2. What type of molecule which is represented by the model below? The correct answer is Steroid.

Amino acids are termed as organic compounds which contain amine. The key elements of amino acids are Hydrogen, Nitrogen, Oxygen, and Carbon. Amino acids from the second largest component which is found in human muscles and other tissues. Amino acids function as a transport of neurotransmitter and in biosynthesis.

Steroids are referred to as organic compounds which have four rings which are managed in a specific molecular configuration. Steroids functions as 1.components of cell membranes which alters membrane fluidity.
2. Signaling molecule.
They are found in fungi, animals, and plants. They are composed of 17 carbon atoms.

ANSWERED AT 21/01/2020 - 10:16 AM


QUESTION POSTED AT 21/01/2020 - 10:16 AM

The maltose molecule can be broken down into two individual glucose molecules with the help of an enzyme produced within a cell. Which of the following changes is most likely to slow down this reaction?. . A. Adding more maltose molecules. . B.Increasing the volume of the cell. . C.Adding more of the enzyme. . D. Increasing the pH within the cell.

D. Increasing the pH within the cell.

Maltose is also known as malt sugar and commonly found in germinating grains. Thus, maltase is enzyme that split the disaccharides maltose into two glucose molecules and can be found within the small intestine of vertebrates which includes human and animals. However, increase in pH of the cell will generally result in incomplete loss of enzyme activities thereby slowing down the enzyme reactions.

ANSWERED AT 21/01/2020 - 10:15 AM


QUESTION POSTED AT 21/01/2020 - 10:15 AM

Which statement is true of all organic compounds? . . All contain carbon.. . All contain nitrogen. . . All are hydrophobic.

All organic compounds contains carbon. Letter B cannot be true. Methylamine (CH3NH2) contains nitrogen and is organic so as methane (CH4). Phenol may be hydrophobic but isopropyl alcohol is hydrophilic. Hence, the answer is A since all of the organic compounds, with or withour nitrogen, hyrdophobic or hydrophilic, they all contain carbon. 

ANSWERED AT 21/01/2020 - 10:14 AM


QUESTION POSTED AT 21/01/2020 - 10:14 AM

The Precambrian time period is segmented into very few parts because:. a.. . the fossil record is scarce. b.. . life did not exist. . c.. . cyanobacteria were the only life form. . d.. . volcanic activity ruined the fossil record. .

The answer is letter A. Fossil records are very scarce to find

The Precambrian era refers to the earliest era of the earth. During this time, there were less evidences of life was found. Though there were some rocks that originated from this era however scientist are not sure if it was in the Precambrian era

ANSWERED AT 21/01/2020 - 10:13 AM


QUESTION POSTED AT 21/01/2020 - 10:13 AM

Select all that apply.:Which structures are found in plant cells?. . A. central vacuole. . B. cell wall. . C. cilia. . D. chloroplast.

Plant cells have a central vacuole, a large chloroplast, and a cell wall. However, they do not have a cilia. The chloroplast is significantly bigger than that of animal cells. The vacuole, too, is larger than that of an animal cell. The large vacuole is one way to identify a plant cell. 

ANSWERED AT 21/01/2020 - 10:09 AM


QUESTION POSTED AT 21/01/2020 - 10:09 AM

The male reproductive structure of nonvascular plants is called a(n) _____. a. antheridia c. rhizoid b. archegonia d. pinnae

The gametophytes of the nonvascular plants have distinct male or female reproductive organs. For male reproductive organ it is called antheridia, it produces motile sperm cells with two flagella, and for female reproductive organ it is called archegonia, it produces the egg cells.

ANSWERED AT 21/01/2020 - 10:07 AM


QUESTION POSTED AT 21/01/2020 - 10:07 AM

Where do the light-independent reactions of photosynthesis occur?

Light-independent reactions of photosynthesis occur in the stroma, which is the fluid filled area of a chloroplast outside of the thylakoid membranes. The light-independent reaction of photosynthesis are chemical reaction that converts the carbon dioxide and other compounds into glucose.

ANSWERED AT 21/01/2020 - 10:06 AM


QUESTION POSTED AT 21/01/2020 - 10:06 AM

What is the substance within a cell that holds all the cell parts?

The cell membrane (or cell wall for plant cells) is what holds everything inside the cell itself, the CYTOPLASM is a jelly-like substance inside the cell that keeps everything in it's place!

ANSWERED AT 21/01/2020 - 10:06 AM


QUESTION POSTED AT 21/01/2020 - 10:06 AM

A strand of DNA serves as a model of the synthesis of RNA molecules. is this true or false?

The statement "A strand of DNA serves as a model of the synthesis of RNA molecules" is totally a false statement. Each and every DNA strand only serves as a template or a model for the formation of other DNA molecule which was called as the process of replication.

ANSWERED AT 21/01/2020 - 10:04 AM


QUESTION POSTED AT 21/01/2020 - 10:04 AM

Cell division occurs in two main stages, the second of which is called __________. a. mitosis b. binary fission c. cytokinesis d. subdivision

The Answer to this this question would be letter A

ANSWERED AT 21/01/2020 - 10:02 AM


QUESTION POSTED AT 21/01/2020 - 10:02 AM

Enzymes______chemical reactions.

Speed up.


Enzymes are used to speed up chemical reactions by being a catalyst.

ANSWERED AT 21/01/2020 - 10:01 AM


QUESTION POSTED AT 21/01/2020 - 10:01 AM

Through _______ larger molecules are formed

The right answer is Polymerization.

Polymers surround us and their place is growing in our daily lives.

There are two main routes of polymerization: chain polymerization and polycondensation.

1 - Polycondensation, also referred to as "step polymerization".

2 - The chain polymerization: the chain reactions involve a reduced number of active centers but these are very reactive.

ANSWERED AT 21/01/2020 - 09:37 AM


QUESTION POSTED AT 21/01/2020 - 09:37 AM

Which of the following is the result of the process that binds many amino acids on to another? A. allele B. DNA C. RNA D. protein

The answer is protein. Hoped this has helped

ANSWERED AT 21/01/2020 - 09:36 AM


QUESTION POSTED AT 21/01/2020 - 09:36 AM

Which of the following is not true concerning the energy harnessed by humans throughout history? a. Early hominids harnessed the least energy, just that of their own bodies. b. Fire let humans increase their energy use tenfold. c. Neolithic farmers were able to harness the energy of animals. d. Modern humans use more than a hundred times the energy of early humans.

Correct answer choice is :


B) Fire let humans increase their energy use tenfold.


Explanation:


Solar energy is just the light and heat that come from the sun. People can harness the sun's energy in a few various ways. Photovoltaic cells, which change sunlight into electricity. Solar thermal technology, where heat from the sun is utilized to make hot water or steam. The human power handled to be all the heat. 150 years ago, stocks that relied on human energy such as the bicycle, pedal-powered machine or stitching machine could be found in most homes.  But humans release energy that can easily be provided by our daily behavior.

ANSWERED AT 21/01/2020 - 09:35 AM


QUESTION POSTED AT 21/01/2020 - 09:35 AM

An organic molecule will always contain _____.

The answer is Carbon AND hydrogen.

ANSWERED AT 21/01/2020 - 09:35 AM


QUESTION POSTED AT 21/01/2020 - 09:35 AM

Do predators really kill only the old and sick prey? What evidence is there for this statement?

Predators will not only kill the old and sick prey. Many predators, like lions, will prey on younger herd animals because they tend to be slower. 

ANSWERED AT 21/01/2020 - 09:33 AM


QUESTION POSTED AT 21/01/2020 - 09:33 AM

Which of the following is true about the alpine biome? a. The alpine biome has four distinct seasons. b. It is characterized by the presence of coniferous trees. c. It is the largest biome in the world. d. It is located in mountain regions.

Alpine Biome, although found on the five of the seven continents of the world, is not the largest biome in the world. It has only two distinct seasons,not four and is characterized by the presence of coniferous trees (the first indicator that you are about to enter an alpine biome) mosses, and even wild flowers too . It is not just located in mountain regions but it in great and wide mountain ranges of the world. --The answer to this question then is not letter C but letter B.

ANSWERED AT 21/01/2020 - 09:33 AM


QUESTION POSTED AT 21/01/2020 - 09:33 AM

How many cell divisions occur during meiosis?

During meiosis, two successive nuclear divisions happens namely Meiosis I or reduction and Meiosis II or division. In meiosis I, it separate chromosomes after allowing crossing over. In meiosis II, it the then separates each chromosomes by splitting them. This division produces 4 haploid cells.

ANSWERED AT 21/01/2020 - 09:28 AM


QUESTION POSTED AT 21/01/2020 - 09:28 AM