If [e]t was the concentration of lactase in the kinetics trials, what expression gives the concentration of lactase in the commercial preparation of this enzyme?
Answers
DF = 1/250 x 1/2
Vt = Et
Vf = final concentration of lactase in the commercial preparation
DF = Vt / Vf
Vf = Vt / DF
Vf = Et / (1/250)(1/2)
Vf = Et x 500
The commercial preparation was first diluted by 1 - 250 to prepare the stock solution, and it was further diluted by 1 -2 by mixing with the substrate stock solution to perform the kinetics experiments.
Therefore, the dilution factor is done when you take whatever you initial volume was - in this case 1mL - and divide it by the new diluted volume - 0.1mL + 25mL. Then we get is 0.1/25.1, which is more easily solved as 1/250.
Since, this was a double dilution, 1mL of the initial dilution was diluted further with 1mL of substrate. So the second dilution factor will be 1/(1+1) = 1/2.
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Related Questions
What describes the conversion of ADP to ATP?
A)an input of energy as both phosphate groups detach
B)a release of energy as one phosphate group detached
C) a release of energy as a third phosphate group is attached
D) an input of energy to attach a third phosphate group
Answers
Answer:
D
Explanation:
The option that describes the conversion of ADP to ATP is D) an input of energy to attach a third phosphate group.
What is ADP?ADP (adenosine diphosphate) is a molecule that is made up of adenosine and two phosphate groups. ATP (adenosine triphosphate) is a molecule that is made up of adenosine and three phosphate groups. The conversion of ADP to ATP is an energy-intensive process that requires an input of energy.
The third phosphate group is attached to ADP by a process called phosphorylation. Phosphorylation is an energy-requiring reaction that uses ATP as a source of energy.
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student obtain a dear image of window bars on a screen with the help of a convex lens. But
in order to have the best image, his teacher suggested him to obtain the image of a distant tree
Where will the lens has to be moved in order to obtain a clear image?
a, away from the screen
b. behind the screen
c. towards the screen
d. at a very long distance from the screen
Answers
Answer:
A is the answer- away from the screen the lens needs to move
Experiment 2:
Compare the circumference of the balloon before and after freezing. What is the percent increase in this measurement?
Answers
Answer:
17%
Explanation:
Answer:
17%
Explanation:
2. The theory that shows that the Sun is in the center of the solar system is called
a. Geocentric Theory
b. Scientific Theory
C. Egocentric Theory
d. Heliocentric Theory
Answers
Which scenario would most likely result in cooperative hunting? Finches eat grass seeds, but grass seeds are not found in an area during winter months. A shark eats a certain kind of fish, and the fish swim together when the shark comes close. Wolves eat rabbits, and the number of rabbits in an area is low. Lions eat zebra, and there are a lot of zebra and lions living in an area.
Answers
1 DNA unzips exposing nitrogen bases.
2 RNA nucleotides pair up with their corresponding DNA bases, copying the code.
3 mRNA carries the newly copied code out of the nucleus and to the ribosome.
4 tRNA brings the appropriate amino acids to the ribosome depending on the code.
5 A series of amino acids make up the newly formed proteins.
6 The proteins get to work!
Which of the above steps is Transcription?
Which of the above steps is Translation?
(Please answer ASAP)
Thanks for answering, I appreciate you for the help you have provided me! Enjoy your day/night.
Answers
Translation: 4,5,6 (RNA-> PROTEIN)
2. A food web explains why there are more _____. It is because more energy is available to _____. A. Decomposers than consumers / consumers b. Producers than decomposers / consumers c. Consumers than producers / producers d. Producers than consumers / producers
Answers
Answer:
D
Explanation:
A food web explains why there are more producers than consumers. It is because more energy is available to producers.
The food web is a structural representation of the feeding relationship that exists among the living organisms in a particular environment.
A typical food web groups living organisms as producers, consumers, or decomposers. Producers are those that fix sunlight energy into chemical energy, a process known as photosynthesis while consumers are those that either feed on producers or other living organisms in the environment. The decomposers return both producers and consumers back to the earth and help nutrients circulate in the environment.
In a typical food web, producers are usually more than consumers because more energy is usually available at this level. Less and less energy becomes available as we move up the ladder in each food chain that makes up the food web.
The correct option is D.
Science cells pls help
Answers
Answer:
sou brasileira bem não posso ajudar ok
In the body, red blood cells have a much shorter lifetime than cheek cells.
Use ideas about the different structure of these cells to suggest why.
Answers
It does not consist of a cell membrane or a cytoplasm.
It simply only transports oxygen around the body.
Pls mark me brainliest:)
what is site of gaseous exchange in an insect
Answers
Answer:
what are the answers? if I knew the answers I could tell ya
DNA relays information in the _______ of its nitrogenous bases.
1.Length
2.Size
3.Order
4.Composition
Answers
Answer:
3
Explanation:
DNA RELAYS INFORMATION IN THE ORDER OF ITS NITROGEN BASES
Complete a Punnett square for the cross-pollination of a female (TT) and a male (Tt). Write in the correct answers to complete the square.
Answers
first row: T, T
first column: T, t
row 2, column 2: TT
row 2, column 3: TT
row 3, column 2: Tt
row 3, column 3: Tt
it doesn't matter whether you put the female (TT) in the first row or the male (Tt) in the first row. you can interchange those positions.
i hope this helps! have a great day :)
If you see an ant digging an anthill, chances are it's:
a. A worker
b. A drone
c. A larva
d. A queen
Answers
Answer: A
Explanation:because the queen sits and because i got it right
HELPPP ASAPPPP!!!! Plsssss
Answers
Answer:
Waxing gibbous
Answer:
waxing gibbous
Explanation:
BRAINLIEST Explain the difference between a scientific law and a scientific theory.
Answers
Answer:
A theory is a group of related hypotheses that can be accepted as true based on repeated investigations with similar results. A law is a scientific concept that explains what patterns of behavior will be seen through repeated investigations
Explanation:
sample response on edge
What activities can increase the amount of atmospheric CO2?
Answers
Answer:bush burning
Explanation:
Since CO2 is a byproduct of combustion, it is released in a large quantity during bush burning
ex. coal, gas
Radiant energy is the source of electromagnetic waves, which include x-rays, infrared and ultraviolet waves among others. The diagram below shows the electromagnetic spectrum. Which wave has the greatest frequency?
Answers
Answer:
gamma
Explanation:
In the electromagnetic spectrum, gamma rays are the electromagnetic waves which have greatest frequency.
What is electromagnetic spectrum?The electromagnetic spectrum consists of electromagnetic radiation which consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.
The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.
In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.The waves are arranged in decreasing order of energies in the electromagnetic spectrum.There are seven types of electromagnetic waves.
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1. Look at the five structures shown here. How do you think they are related to each other?
Answers
Answer:
They are all related to cells
Explanation:
;^; can you list the answers
DNA is a structure made up of two coiled polynucleotide chains with nitrogenous bases present in chromosomes. These chromosomes are present in the nucleus of the cell. These cells together form an organism.
What are Cells?Cell is define as the smallest unit which can live on its own and that makes up all living organisms and the tissues of the body. A cell has three main parts:
1. The cell membrane
2.The nucleus
3. The cytoplasm.
A nucleus is defined as the membrane-enclosed organelle within a cell that contains chromosomes. It is an array of pores, or pores, in the nuclear membrane that allow the selective passage of certain molecules, such as proteins and nucleic acids, into and out of the nucleus.
Chromosomes are define as the threadlike structures made of protein and a single molecule of DNA which serve to carry the genomic information from cell to cell. These DNA (Deoxyribonucleic acid) is a polymer which is composed of two polynucleotide chains that coil around each other to form a double helix consisting of nitrogenous bases.
Thus, DNA is a structure made up of two coiled polynucleotide chains with nitrogenous bases present in chromosomes. These chromosomes are present in the nucleus of the cell. These cells together form an organism.
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2. RNA polymerase is a type of enzyme. Enzymes help chemical reactions occur quickly. Click the Release enzyme button, and describe what happens.
Answers
Answer:
The nucleotides are split
Explanation:
With the release of enzyme, enzyme take part in the chemical reaction without utilizing in it.
When the enzyme release by any glands in the body, it attached to the substrate and speed up the chemical reaction without using in it. Once the chemical reaction ended, the enzyme which attached the substrate earlier detached and then attached other substrate in order to speed up the chemical reaction.
Without enzyme, chemical reaction occurs but at a very slower rate so we can conclude that with the release of enzyme, enzyme take part in the chemical reaction without utilizing in it.
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Which factor is needed for both thunderstorms and hurricanes to form?
Answers
Answer:
C. rising moist air
Explanation:
for the storm to start/process it needs the moist air in order for both hurricanes and thunderstorms to happen, because the rotation with the moistness creates the storms.
Hope this helps
Answer:
rising, moist air
Explanation:
because it is i got it right on my test
A scientist is studying a worm. It is three millimeters long and pointed at each end. The worm is unsegmented and has only male reproductive structures.
Which kind of worm is the scientist most likely studying?
a tapeworm
a flatworm
a roundworm
an earthworm
Answers
Answer:
i think the answer is c roundworms
Explanation:
i know im right becausee i made a 90% with this being right
Answer:
a roundworm
Explanation:
I got the answer right on quiz .
Which of the following is not a premise of Cell Theory?
l. All cells arise from other cells.
ll. All living cells require water for survival.
lll. All living things are only composed of cells.
Choose 1 answer:
a. I only
b. ll and lll
c. ll only
d. lll only
Answers
All cellsarisefromothercells a I only
The Colorado River provides water and electricity for over 40 million people. But so much water is withdrawn from this river for agriculture/livestock and drinking water, that very little of it reaches the sea. Due to drought and overuse, it currently is drying up. This will be a major problem because crops and livestock in the USA depend on this water. What percent of the nation's crops and livestock rely on the river's water?
Answers
Answer:
About 80%
Explanation:
why do you think using a person's own cell to make a new organ or tissue for them will increase the chance that their body will accept the transplant?
Answers
Answer:
In my personal opinion, I think this is possible because your body already knows the cell. It is already familiar with it.
Explanation:
What usually happens to a population of organisms when the region's carrying capacity has been reached?
Answers
Answer:
the population starts to slowly decline
Explanation:
The population will decline drastically because there is not enough resources to sustain the population or increase the population.
WILL GIVE BRIANLIEST
What evidence supports the law of conservation of energy?
Light energy is converted to chemical energy during photosynthesis.
Oxygen is made from the breakdown of carbon dioxide during photosynthesis.
Energy is absorbed by chlorophyll during photosynthesis.
The sun gives off light energy that is absorbed by plants.
Answers
Answer:
Light energy is converted to chemical energy during photosynthesis.
Explanation:
nevermind.............
1. What are 5 sources of natural gas used today.
Answers
PLEASE HELP WILL MARK THE BEST!!!!
Answers
Answer:
#3#5#7
Explanation:
hopes this helps
PLEASE HELP, WILL MARK BRAINLEST
The picture below shows a model of the solar system.
Picture shows the sun in the center and six circular orbits around it. The first orbit around the sun has the planet Mercury, the second orbit has planet Venus, the third orbit has planet Earth, the fourth orbit has planet Mars, the fifth orbit has planet Jupiter, and the sixth orbit has planet Saturn.
Which of these is most likely a use of this model?
make the concepts about solar system more understandable
show the exact distances between objects in the solar system
reproduce every characteristic of the solar system accurately
prove that most theories about the solar system have loopholes
Answers
Answer:
A
Explanation:
It is likely used as a representation of the solar system to help visual learners understand better.
Answer:
A
Explanation:
Grace and Carlos are going for a walk the temperature is -15°C with wins at 10 to 12 mph what should I wear