The question is incomplete, the complete question is;
Researchers investigated the influence of environmental pH on the activity of peroxidase, an enzyme that catalyzes the conversion of hydrogen peroxide to water and oxygen gas. In an experiment, the researchers added a hydrogen peroxide solution containing guaiacol to several identical test tubes and adjusted the solution in each test tube to a different pH. The researchers included the guaiacol because it caused the solutions to change color as the reactions proceeded, which the researchers relied on for measuring reaction rates. Finally, the researchers added the same amount of peroxidase to each test tube and measured the rate of each reaction at 23°C. The results of the experiment are represented in Figure 1.
Figure 1. The effect of pH on peroxidase activity
Which of the following actions will provide a negative control for the investigation?
A
Repeating the experiment at 25°C
B
Repeating the experiment using twice the amount of hydrogen peroxide
C
Repeating the experiment using twice the amount of peroxidase
D
Repeating the experiment using heat-denatured peroxidase
Answer:
D
Repeating the experiment using heat-denatured peroxidase
Explanation:
A Negative control is a situation in which a particular reagent added to an experimental set up just as all the other samples is not expected to effect any change in the responding variable.
In this case the independent variable is the pH of the solution while the responding variable is the activity of peroxidase enzyme.
A denatured enzyme is not expected to have any effect on the responding variable. Hence, this is a negative control.
The action that will give a negative control for the investigation is D. Repeating the experiment using heated-denatured peroxide.
A negative control simply means the situation where a reagent that is added to an experimental set up is not expected to have an impact on the responding variable.
It should be noted that repeating the experiment at 25°C will not lead to a negative control for the investigation. On the other hand, the repetition of the experiment using heated-denatured peroxide will lead to a negative control as the responding variable isn't affected.
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The Himalayan rabbit's habitat has cold, snowy winters and mild summers. The body is
typically covered in white fur except for the nose, feet, tail, and ears, which are covered in
black fur
Himalayan Rabbit
A scientist shaved an area of white fur on the back of a Himalayan rabbit and placed an ice
pack over the shaved area. The shaved area grew black fur.
Which of these best explains why the hair that grew back where the ice pack was placed was
black and not white?
F The genes for black hair were activated by specific temperatures.
G The white hair mutated to black hair as the rabbit's body temperature decreased.
H The coat color changed from white to black with the age of the rabbit.
3 White hair only grows during certain times of the year.
Answer:
F. The genes for black hair were activated by specific temperatures
Explanation:
The white hair only grows in cold temperatures. Just because they put an ice pack on the rabbit does not mean that its cold.
Rabbits regulate their body temperature by using their ears. A fever or a dip in body temperature could be indicated by extremely chilly or hot ears. Thus, option F is correct.
What are the adaptation rabbits have in Himalayan?In general, rabbits thrive in cooler climates. In the fall, rabbits stop shedding their fur and develop a thick coat of fur that keeps them warm in the winter. Low temperatures of 32 degrees don't really bother them.
Strong back legs offer rabbits the speed they need to run away from predators. Their feet have fur on the bottoms for warmth and strong claws for traction.
The white hair only grows in cold temperatures. Just because they put an ice pack on the rabbit does not mean that it's cold.
Therefore, The genes for black hair were activated by specific temperatures
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plsssss helpppp asap
Answer:
cant see the pic
Explanation:
when would an offspring not exhibit an inherited mutation?
Answer:
when the paternal don't have said mutation to begin with
Explanation:
This system provides energy from food
A. Circulatory
B. Endocrine
C. Digestive
D. Lymphatic
Answer:
c
Explanation:
Carbohydrates, proteins, and lipids provide this energy. Chemical bonds in molecules of these nutrients contain energy. When the bonds are broken during digestion to form simpler molecules, the energy is released.
What is the location of carbohydrates in the cell?
Answer:
I think its cell membranes
Please correct me if I am wrong thank you
Explanation:
A. The sun heats the air at the equator, followed by hot air rising and moisture condensing
B. Air moves towards the poles as it cools
C. The dry air moves back to the equator, picking up a lot of moisture on the way
D. The air sinks around 30° latitude and is very dry.
Answer:
B. Air moves towards the poles as it cools
Explanation:
The image represent convection cell or Hadley cell is a natural phenomenon in the atmosphere that occur due to difference in the density within a body of liquid or gas. These differences in density causes rise and fall in currents.
The process in step A refers to when hot air moves up and in the step B, the hot air encounters a cold surface, it direct exchange the heat with cold surface and the air cools down and move towards the poles.
Hence, the correct answer is "B. Air moves towards the poles as it cools".
During the nitrogen cycle, through which structure are nitrogen compounds first absorb into the plant?
A.) roots
B.)leaves
C.) flower
D.) stem
Answer:
It's B
Explanation:
I took the test
Answer: B (Leaves)
Explanation:
Did it engenuity unit test
Due to the intense heat and pressure on the inner core, scientists believe it is a:
A. Solid
B. Liquid
C. Semi - Fluid
D. Gas
Answer:
c. semi-fluid
Explanation:
im dumb
What is the main function of the cell membrane?
A. To pass the genetic information from one cell to another.
B. To protect the cell from Invaders.
C. To regulate what enters and leaves the cell.
Answer:
pretty sure its b
Explanation:
The answer for this is A.
Which of the choices below provide direct evidence of evolution
A. Fossil
B. Plate tectonics
C. DNA
D. Both A and C
PLEASE ANSWER QUICK
The figure presents a diagram of adding d T M P to a growing strand of D N A. A D N A template that consists of nine nucleotides is shown. Five nucleotides have already been added to the complementary strand that is growing from left to right along the template. The left end of the growing strand is labeled 5 prime, and the right end is labeled 3 prime. The left end of the template strand is labeled 3 prime, and the right end is labeled 5 prime. An incoming d T T P has three phosphate groups. Arrows indicate that the two outermost phosphate groups split off as the d T M P with the remaining phosphate group is about to join to the 3 prime end of the growing strand.
Figure 1. Model showing details of adding a deoxythymidine monophosphate (dTMP) nucleotide to a growing strand of DNA
The features of this model provide evidence for which explanation of why all growing strands are synthesized in a 5′ to 3′ direction?
A. The two strands need to be antiparallel to bond properly.
B. Thymine and adenine would not bond properly if the strand grew from 3′ to 5′.
C. The translation of mRNA occurs in the 5′ to 3′ direction; therefore, the growing DNA strand must also grow in the 5′ to 3′ direction.
D. The phosphate group, attached to the 5′ carbon of the dTMP, forms a covalent bond with the oxygen atom attached to the 3′ carbon of the growing strand.
Answer:
D - The phosphate group, attached to the 5′ carbon of the dTMP, forms a covalent bond with the oxygen atom attached to the 3′ carbon of the growing strand.
Explanation:
I got it checked and it was right
The feature of the model provides evidence in a 5′ to 3′ direction is the phosphate group, attached to the 5′ carbon of the dTMP, forms a covalent bond with the oxygen atom attached to the 3′ carbon of the growing strand. The correct option is D.
What are DNA bases?The sequence of DNA bases is referred to as the DNA sequence. RNA and DNA are both genetic elements composed of nucleic acids composed of deoxyribose acid, while RNA is composed of ribonucleic acid.
Both DNA and RNA have four bases that are linked together by a hydrogen bond. RNA has uracil in place of thymine, but DNA has timing and all other bases are the same.
Therefore, the correct option is D. The phosphate group, connected to the dTMP's 5′ carbon, creates a covalent bond with the oxygen atom associated with the developing strand's 3′ carbon.
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A cell that has 6 chromosomes in the G2 phase will have how many sister chromatids during that same phase
Answer:
12 chromatids.
Explanation:
If a cell has 6 chromosomes in the G2 phase will have 12 sister chromatids during that same phase because replication of chromosomes occurs which produces two exact copies of each chromosomes. Then 6 chromatids are distributed in one daughter cell while the other 6 chromatids are distributed in other daughter cell and finally the cell division occurs.
please help please giving brainlest
Answer:
hmm it think it is option one as the answer
Explanation:
because i typed it in and i found the answer
This is the origin of new combinations of traits in offspring(fourth option). This process is called crossing-over or intrachromosomial recombination. This is the reason why parents and offspring don't look alike
Please actually answer the question i need the answer, i'll give brainliest!!!!
A city is located in an area that has experienced 7.5-magnitude earthquakes in the past.
The city is considering building a new skyscraper.
Use the earthquake magnitude scale to predict the amount and type of damage residents should expect from future earthquakes of similar magnitude.
Then suggest a way to minimize the effects of future earthquakes on the skyscraper.
PLZ HELP IM TAKING MY EXAM!! which of the following best explains the impact of mrna being double stranded before translation
Answer:
Impact of double-stranded mRNA before translation would inhibit the binding of tRNA to mRNA ti synthesize protein.
Explanation:
The mRNA is a molecule that, with the exception of viruses with double-stranded RNA, has only one chain. It is in charge of conducting to the ribosomes the sequence of nucleotides that makes possible the translation and the synthesis of proteins.
Once the ribosome translates the information of each codon of the mRNA, a transfer RNA (tRNA) molecule, with a complementary anticodon, provides the amino acid corresponding to the translated codon.
If the mRNA were double-stranded, the translation process would be altered, since binding of the tRNA with the amino acid it carries and mRNA codon would not be possible, as well as the protein synthesis.
name the fluid present between arachnoid and pia mater
Answer:
Cerebrospinal fluid fills the ventricles of the brain and the space between the pia mater and the arachnoid.
Explanation:
Why are plants in the alpine biome typically low growing?
A) They have access to nutrient-rich soil.
B) They have limited access to sunlight.
C) They have too much access to water.
D) They have limited access to nutrients.
E) They get trampled on by the alpine animals.
PLS HELP ASAP!!!
Answer:
hi
lm'iranian
11years old
D
During a "fight or flight" response in mammals, the adrenal gland releases a hormone called epinephrine that stimulates liver cells to release glucose for emergency fuel. Describe and explain the signal transduction pathway that follows the release of epinephrine.
Answer:That is, a signal is released by the sending cell in order to make the receiving ... In some cases, we can describe a cellular response at both the molecular ... Many signaling pathways cause a cellular response that involves a change in ... Adrenaline, also known as epinephrine, is a hormone (produced by the adrenal gland) ...
Explanation:
which best describe this scenario
Explanation:
what is the scenario?
Answer:
Multiple different things. You could be doing a psychology experiment. The possibilities are endless. In this scenario I'm trying to think of what you could be thinking about and what scenario you want to be explained.
Help!! Pls ASAP!! Offspring from asexual reproduction are__________,
but offspring from
Sexual reproduction are _____________.
Explanation:
1.
genetically identical to each other and to the parent
2.
Sexual reproduction involves two parents and produces offspring that are genetically unique.
Hopw this helps..... ^_^Did you guys know...
In Justin Bieber’s song “yummy” he says “you make my toes curl” look up the lyrics it’s hilarious
Answer:
thats make me cry of laughter bro... lm ao
Explanation:
Answer:
ya that is
Explanation:
Give two ways in which saliva aids digestion.
Explanation:
Saliva contains special enzymes that help digest the starches in your food. An enzyme called amylase breaks down starches (complex carbohydrates) into sugars, which your body can more easily absorb. Saliva also contains an enzyme called lingual lipase, which breaks down fats.
Are the Earth's seasons caused by the differences in the distance
from the Sun throughout the year or the tilt of the Earth's axis?
Earth's tilted axis causes the seasons. Throughout the year, different parts of Earth receive the Sun's most direct rays. So, when the North Pole tilts toward the Sun, it's summer in the Northern Hemisphere. And when the South Pole tilts toward the Sun, it's winter in the Northern Hemisphere.
In about 100 words, explain how the use of flashback adds meaning to “Rules of the Game.” Be sure to use details from the story to support your answer.
Answer:
“Every time people come out from foreign country, must know rules. Throughout the story, Waverly describes past incidents when cultural differences caused her and her mother to view events differently. Waverly sees events differently because of her American upbringing. Her mother sees events differently because of her Chinese upbringing. She shows this struggle when she describes her mother’s reaction to the game manual for her brother’s new chess set: “This American rules,” she concluded at last.The The use of flashback in "Rules of the Game" provides insight into the complicated relationship between Waverly and her mother. You not know, judge say, Too bad, go back. Better you take it, find out why yourself.” She tossed her head back with a satisfied smile. Waverly notes that her mother has had difficulty adjusting to American culture. They say, Don’t know why, you find out yourself. They not telling you why so you can use their way go forward. But they knowing all the time.
Explanation:
Paraphrased sample answer- you're welcome
AYY YOO :)))
What is the variable in an experiment that stays the same?
A. Responding Variable
B. Independent Variable
C. Dependent Variable
D. Controlled Variable
Whats TWO Answer Giving Brainliest To first Correct AnSwEr:D......... HELP HELP
Answer:
C
Explanation:
Why is the line graph a curve instead of a straight line?
Answer:If it's important to display the exact values, then the straight lines do a much better job. But often you'll find that what matters is the trend and the precise measurements are secondary. ... A straight line suggests that the value between the two measurements increased linearly, while a curved line suggests otherwise.
Explanation- you better read all of that!
The purpose of photosynthesis is …...
helppppp
Answer:
Is for plants to receive energy without hunting for food. they are stationary organisms, therefore depend on photosynthesis for food/energy.
Answer:
Explanation:
to convert light into food
if you want me to pick a multiple choice question just comment on my answer
The cell membrane controls movement of materials into and out of the cell. The following particles are moving from high concentration to low concentration and are using a carrier protein. How would you describe this type of movement across the membrane?
A. simple osmosis
B. active transport
C. simple diffusion
D. facilitated diffusion and please give a reason why you chose this answer
Answer:
B. active transport
Explanation:
Answer:
b
Explanation:
because active transport obey the concentration gradient..
Why do only house geckos and Pacific gulls have two temporal holes in their skills?
Answer:
They listen to sound and feel vibrations through those two temporal holes to grasp their surroundings and survive.
Explanation:
Hope this helped!