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.
Read related link on:
https://brainly.com/question/6749890
Science 6th grade digital INB- You dont know what parts of the ground are safe and what parts are thin crusts of soil covering fires or sinkholes. Design a system that can access the area and take measurements that show changes in the fire. (No right or wrong answer just need someone to come up with something and quick.)
Answer:
Fire detecting Scanner.
Explanation:
Fire detecting Scanner is a system which has the ability to scan the area and tells the changes occurs in the fire inside the earth crust. This scanner collect all information about the area on the basis of which we can take steps to avoid the damage caused by the fire. With the help of this scanner we can tell that which part is safe and which part of the area is dangerous for people.
DNA and RNA differ in the following way(s):
1. DNA has a phosphate and RNA does not
2. DNA and RNA have different 5 carbon sugars
3. DNA and RNA have the same nucleotides
4. Both A and C
Answer:
2
Explanation:
RNA contains the sugar ribose, while DNA contains the slightly different sugar deoxyribose
What's healthier for you bottled water are top water
Answer:
bottled
Explanation:
Salivary amylase is an enzyme in humans that breaks down starches. What substances would humans have difficulty digesting without this enzyme
Group of answer choices
Answer:
Carbohydrates
Explanation:
High in fats and very fatty
In the absence of salivary amylase, humans would have difficulty digesting carbohydrates.
What is salivary amylase?Salivary amylase is produced by the salivary glands located towards the back of our mouth. Salivary amylase is a very small percentage of the total amount of amylase produced by the body.
Most of the amylase in the body is secreted by the pancreas. Salivary amylase is secreted in the saliva. This begins the process of the breakdown of food in the mouth itself.
Salivary amylase breaks down carbohydrates into maltose units which is a disaccharide. The maltose is ultimately broken down into glucose.
Carbohydrates are a very significant portion of the diet of a large percentage of the global population. Various kinds of bread and rice have a large portion of them composed of carbohydrates.
Therefore, in an absence of salivary amylase, humans would have difficulty digesting carbohydrates.
Read more about carbohydrates, here
https://brainly.com/question/14614055
#SPJ6
Blank 1) Proteins
Cytoplasm
Chromosomes
Blank 2) Alleles
Proteins
Chromosomes
Blank 3) Mutations
Adaptations
Chromosomes
Blank 4) Neutral
Harmful
Beneficial
Beneficial, neutral, or harmful
Answer:
Blank 1) chromosomes
Blank 2) proteins
Blank 3) mutations
Blank 4) harmful
Most animals living in the_______migrate or hibernate during the winter.
options:
Tropical Rainforest
Desert
Tudra
Answer:
Tundra
Explanation:
to survive the long cold winters and to breed and raise young quickly during the winter they migrate
Senescence __________. Question 5 options: a) begins at the moment of conception and accelerates after age 40 b) occurs across all parts of the body at the same time and speed c) begins once body structures reach maximum capacity and efficiency d) occurs because the physical body wears out from use
Answer: c. Senescence begins once body structures reach maximum capacity and efficiency
Explanation: Senescence is simply ‘growing old’. Aging sets in at the time when physical development is complete - when a person reaches their ‘prime’. After that a person is ‘past their prime’ which is the subjective recognition of the on set of gradual deterioration. The biological rationale is that the purpose of life is to survive to reproductive age and to reproduce, and in some species to assist progeny to survive to reproductive age. Beyond that, survival has limited value.
An analogy is the length of an elephant’s trunk. It is as long as it needs to be, determined by natural selection, but no longer than it needs to be for optimum efficiency, again determined by natural selection.
At night, a land breeze forms because
A) water releases less solar energy during the day; warm ocean air moves into land.
B) land cools more quickly than water; cool land air moves to replace rising warm air over the water
C) land absorbs less solar energy during the day; cool land air moves to replace rising warm air over the water
D) water absorbs more solar energy during the day; cool land air moves to replace rising warm air over the water
Answer:
B) land cools more quickly than water; cool land air moves to replace rising warm air over the water
Explanation:
During the day, the land surface heats up faster than the water surface. Therefore, the air above the land is warmer than the air above the ocean. ... The bottom of the following image illustrates the land breeze that occurs at night. Recall that the land surface cools quicker than the water surface at night.
1. This is a glucose molecule, the sugar made in photosynthesis. Saccharides, or sugars, are
the building blocks for carbohydrates. What is another term for “building block?"
Study the diagram of a cell.
Which structures are found in both plant and animal
cells?
Wand X
W and Z
X and Y
Y and Z
Answer:
W and Z
Explanation:
Answer:BBBBBB
Explanation:
Because I got it right on the asihnement
energy transfer through molecule to molecule contact is called?
Answer:
It's called conduction
Explanation:
Which organelle is found in plant cells only? A.7 B.1 C.3 D.6
Hi- Uhm, Help, please?
Answer:
At the end of meiosis there are two daughter cells, at the end of meiosis telopashe there is four different cells
Explanation:
what happens to all the weight of the food we eat
Answer:
All the weight of food we eat can happen in many ways. It can be digested and turned into waste. It can also be turned into body fat. The weight of the food we eat can help give us nutrition and vitamin s.
Explanation:
The weight of food can slightly go away due to food going in to the digestion system and turns into waste.
Apologies if this isn't the best answer.
A dry beaker has a mass of 55.0 g. When 50.0 mL of water is added to the beaker, the mass of the water and the beaker is 105.0 g. What is the density of the water?
A nucleotide consists of
A nucleotide is made up of a sugar molecule connected to a phosphate group and a nitrogen-containing base. These bases in nucleotides are adenine, cytosine, guanine, and thymine (Note: Thymine is not present in RNA so it is replaced with Uracil.)
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.
Put the following in order from most thermal energy to least thermal energy.
from hottest to coldest:
- the turkey
- the tea
- the beach
- the, what is it, an iceberg or ocean?
- the ice cube
refer to the other question I answered by you. 0 degrees Celsius would be frozen, 100 would be boiling hot. Since -2 is the lowest, that would be the coldest/ least amount of thermal energy. 60 degrees Celsius is the highest, so it has the most thermal energy. Again, thermal energy is just heat energy, so you just need to figure out which is hottest.
Grizzly bears have a diploid number of 74 chromosomes in their body cells. How many chromosomes were in each of the male's sperm cells?.
Answer:
74 ÷ 2 = 37
since it's only one gamete cell then it's twice less the number
what are the 7 factors of classification of living things
1 Nutrition
Living things take in materials from their surroundings that they
use for growth or to provide energy. Nutrition is the process by
which organisms obtain energy and raw materials from nutrients
such as proteins, carbohydrates and fats.
2 Respiration
Respiration is the release of energy from food substances in all
living cells. Living things break down food within their cells to
release energy for carrying out the following processes.
3 Movement
All living things move. It is very obvious that a leopard moves but
what about the thorn tree it sits in? Plants too move in various
different ways. The movement may be so slow that it is very
difficult to see.
4 Excretion
All living things excrete. As a result of the many chemical
reactions occurring in cells, they have to get rid of waste products
which might poison the cells. Excretion is defined as the removal of
toxic materials, the waste products of metabolism and substances
in excess from the body of an organism.
5 Growth
Growth is seen in all living things. It involves using food to
produce new cells. The permanent increase in cell number and size
is called growth.
6 Reproduction
All living organisms have the ability to produce offspring.
7 Sensitivity
All living things are able to sense and respond to stimuli around
them such as light, temperature, water, gravity and chemical
substances.
Answer:1 Nutrition.
2 Respiration. ...
3 Movement. ...
4 Excretion. ...
5 Growth.
6 Reproduction. ...
7 Sensitivity.
Explanation: Im 98% sure this is correct.
Sodium has the atomic number 11. How many electrons are in a sodium ion, which has the symbol Nat?
A.
10
B.
11
C.
12
Answer:
11
Explanation:
Hope this will help you
The condition of ketoacidosis is Select one: a. a potentially fatal buildup of acetoacetate or 3-hydroxybutyrate lowering blood pH. b. due to a lowered production of ketone bodies than is normal. c. the increase in pH of the cells due to ketone body production. d. only found when anaerobic catabolism of fat occurs.
Answer:
The correct answer is option A ( a potentially fatal buildup of acetoacetate or 3-hydroxybutyrate lowering blood pH.)
Explanation:
Ketoacidosis results in a type of body metabolic state where the urine concentrations are high in ketone bodies, such as acetoacetic acid , 3-hydroxybutyrate. Fatty acids are converted to ketone bodies, resulting in a very high level of ketone bodies which automatically lowers the blood pH.
Ketoacidosis is of different types, Diabetic ketoacidosis, alcoholic ketoacidosis, starvation ketoacidosis. They are all associated with the accumulation of ketone bodies within the bloodstream. The underlying disease common with ketoacidosis is Diabetes.
help please don't know the answer
All life on Earth has DNA. All life on Earth has the same set of mutations in its genes
Messenger RNA (mRNA) travels from the nucleus of a eukaryotic cell to the ribosome. At the ribosome, the amino acids are lined up in order as the tRNA molecules line up with complementary bases on the mRNA. This process is called _____ and results in the formation of _____.
Answer:
The correct answer is - translation, polypeptide/amino acid chain.
Explanation:
The translation is the process that involves the movement of mRNA from the nucleus to the ribosome and where amino acids are formed in sequence linked with one another in the same order as the transfer RNA line up with the complementary bases encoded on the messenger RNA or mRNA.
This amino acid chain or the polypeptide folds in a specific way to active protein for the specific function or expression. This process is the last stage or phase of protein synthesis.
Type your answer in the box.
The video reports a decline in the number of "packers" in California. What are packers, and what challenges does
their decline pose to firefighters who fight wildfires?
Answer:
packers are people who pack mules with firefighting supplies and deliver those supplies to the firemen fighting fires in california. The decline of packers in california means that there is a smaller chance that the firemen wont have gear and supplies to fight the fire. The fires will win and burn down people's homes and cost some people thier lives.
Explanation:
Don't worry; this isn't the direct answer. I wrote this by myself.
HELPPPPP ILL MARK YOU BRAINLY
Answer:
Photosynthesis transforms light energy into chemical energy by making sugars. Cellular respiration releases the chemical energy from food by breaking down sugars.
Which describes gas exchange in the respiratory system?
A. Gas exchange happens through diffusion.
B. Gas exchange removes oxygen from the body.
C. Gas exchange occurs between the body’s cells and bronchi.
D. Gas exchange protects the body against foreign invaders.
Answer:
A.
Explanation:
A. Gas exchange happens through diffusion.
Answer:
A
Explanation:
What does the image above depict?
a. images and fragments from the artist's dreams
b. a ymbolic representation of a German officer
C. symbolic memories of the artist's life
d. the horrors of war
Answer:
B. symbolic representation of a German officer
Explanation:
"Portrait of a German Officer is an early 20th century portrait by American modernist painter Marsden Hartley. Done in oil on canvas, the portrait depicts the abstract figure of an Imperial German officer as being composed entirely of military decorations and badges of rank."
The image above depicts a symbolic representation of a German officer.
Portrait of German officer
The picture in the given image depicts a portrait of a German officer an early 20th century.
The portrait was designed by an American modernist painter Marsden Hartley. Done in oil on canvas, the portrait depicts the abstract figure of an Imperial German officer as being composed entirely of military decorations and badges of rank.
Thus, the image above depicts a symbolic representation of a German officer.
Learn more about image here: https://brainly.com/question/25938417
#SPJ2
Match the type of metamorphism to its cause.
Answer:
Contact - Heat
Dynamic - Directed Pressure
Impact - Meteorite
Regional - Surrounding
Which describes an old technology and a current technology that can fulfill people’s needs?
emerging technologies
overlapping technologies
obsolete technologies
coexisting technologies
Answer:
coexisting
Explanation:
Answer:
Coexisting
Explanation: