A researcher measured the temperature at which two different samples of double-stranded DNA denature (separate into single strands) Sample 1 denatured at a significantly lower temperature
than sample 2 did. Based on the data, the researcher claims that the DNA in sample 2 is composed of a higher percentage of guanine and cytosine than the DNA in sample Ils
Which of the following best supports the researcher's claim?
Sube
The bonds between guanine and cytosine are covalent bonds, which require more energy to disrupt than those between adenine and thymine
B
Guanine cytosine pairs denature at a higher temperature because they have more hydrogen bonds between them than adenine-thymine pairs do
с
Aderine thyminepalis require less energy to separate because adenine and thymine are both single-ring bases
D
Guinine cytosine pas require more energy to separate because one is purine and one is a pyrimidine

Answers

Answer 1

Answer:

The correct option is b

Explanation:

There are four nitrogenous bases that can be found in a DNA molecule; Adenine, Thymine, Guanine and Cytosine. The adenine on one strand can only bond (hydrogen bond) with the thymine on the complimentary strand (to form base pair) and vice versa while the guanine on one strand can only bond (hydrogen bond) with the cytosine on the complementary strand (to form base pairs) and vice versa.

There are three hydrogen bonds between Guanine and cytosine base pair while there are two hydrogen bonds between adenine and thymine base pair; hence, DNA samples with higher guanine-cytosine base pairs denature at a higher temperature than DNA samples with lower guanine-cytosine base pairs or with more adenine-thymine base pairs. This is because, it requires more energy to break the triple bonds between the guanine-cytosine base pairs than the double bonds of adenine-thymine base pairs.

From the description above, we can deduce that the correct option is b

Answer 2

Answer:

the correct answer is D

Explanation:

i have checked the answer in a flashcard


Related Questions

where does a photosystem occur in a plant cell

Answers

Answer:

thylakoid membrane

Explanation:

yes


What are the functions of sugars

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Answer:

the provide the energy u need

Explanation:

list 3 pros to cow calf operation

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Answer:

1. Profits

2. Forage is cheaper than feed

3. low death loss

Which one of the following is true of the structures labeled D in the cell membrane?A.They are membrane proteins.B.They are hydrophilic.CThey are carbohydrates.D.They are hydrophobic?

Answers

The structure labelled D in the cell membrane is hydrophilic in nature. That is option D.

What is phospholipid bilayer?

Phospholipid bilayer is defined as the part of the cell membrane that is made up of two phospholipid layers which include:

Hydrophobic layer: The interior which is water hating

Hydrophilic layer: The exterior that is water loving.

Therefore, from the diagram, the structure labelled D is the interior part of the phospholipid bilayer which is hydrophilic in nature.

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What is used to select the entire table

Answers

Answer:

Select an entire table using a keyboard. To select an entire table using a keyboard, position the cursor in the first cell of the table. Press Alt + Shift + End on your keyboard to select to the end of the first row and then press Alt + Shift + Page Down to select to the last cell.

6. Alex wanted to find out what toothpaste made teeth the cleanest. Everyday she brushed her teeth with a different product and then took a plaque test to see how much plaque was left. She used Crest, Colgate, Close-up, and water. a. Independent Variable (IV): ______________________________________________ b. Dependent Variable (DV): ______________________________________________ c. Control: _____________________________________________________________ d. Constants:__________________

Answers

Answer:

Independent variable: Different products of toothpaste

Dependent variable: Amount of plaque left in her teeth

Control group: Water

Constant: Same amount of time for product to have an effect

Explanation:

Independent variable is the variable that is subject to manipulation or change by the experimenter in order to effect a measurable response. The independent variable in this experiment is the DIFFERENT PRODUCTS OF TOOTHPASTE USED.

The dependent variable is the variable that is measured during the experiment. In this experiment, the dependent variable is the AMOUNT OF PLAQUE LEFT IN ALEX'S TEETH.

The control group in an experiment is the group that does not receive the treatment/independent variable. In this case, the usage of WATER is the control.

The constant is the variable kept the same for all the groups in the experiment. In the case, the Same amount of time for each product to have an effect on her teeth is the CONSTANT.

Ultimately, all scientific knowledge comes from:
Select one
a. textbooks
O b. experimentation
O c. experimentation & observation
O d. observation

Answers

Ultimately, all scientific knowledge comes from:

Select one

O a. textbooks

O b. experimentation

O c. experimentation & observation

O d. observation

Ultimately, all scientific knowledge comes from experimentation and observation (Option c).

What are experimentation and observation?

Experimentation and observation are procedures used in the scientific method to validate hypotheses.

The experimental and observational procedures can also be used to reject my working hypothesis.

In conclusion, ultimately, all scientific knowledge comes from experimentation and observation (Option c).

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HELP ME

A plate moves south at a rate of 2 cm/year. How many meters south from its original location will the plate be in
4,000 years?
8,000 meters south
04.000 meters south
O 200 meters south
O 80 meters south

Answers

Answer:

8,000 meters south

Explanation:

2 times 4,000

Answer:

80 meters

Explanation:

2cm per year would be 8000 cm in 4000 yearsconvert 8000 cm to meters there are 100cm in a meterso 8000 cm is equal to 80 meters

why must a scientific explanation be supported by data

Answers

Answer:

Supporting a scientific inquiry with data helps reduce the bias opinion that's humans have.

What would you need to know to determine the total amount of photosynthesis going on in the canopy and near the forest floor? Why?

Answers

Answer:

you would need alot of water and soil

Explanation:

The main focus of conservation is to
a. wisely manage natural resources for people's use
b. set aside land and protect it from human activities
c. demand government action to pass environmental laws
d. prevent wild species from becoming endangered
e. limit society's demand for natural resources

Answers

Answer:

A.) Wisely manage natural resources for people's use

Explanation:

Because conservation is like preservation but conservation wants to seek sustainable use of nature by humans for activities such as, hunting, logging, and even mining.

I’m gonna go with D. Prevent wild species from becoming endangered . Because most of the time, the purpose of conservation is to protect species from extinction.

A very thin slice is removed from a peanut and treated with Sudan III, another indicator that turns red in the presence of a lipid. Then the same slice is treated with Biurets reagent. When the peanut is examined under a microscope, little patches of red and blue-violet can be seen. What conclusions can be drawn from this examination? Why would you expect this result?

Answers

Answer:

Little patches

Explanation:

blue- violet

Little patches and blue- violet.

What is Little patches?

Sudan III is a bis(azo) chemical that has a 4-[(2 methylphenyl)diazenyl]phenyldiazenyl group replaced at position 1 of the 2-naphthol ring. a fat-soluble dye that can stain some protein-bound lipids in paraffin sections and is mostly used to show triglycerides in frozen sections.

It functions as a histology dye, a fluorochrome, and a carcinogen. It belongs to the class of azobenzenes, is a bis(azo) chemical, and is a naphthol. It is similar to a 2-naphthol in terms of function.

"It certainly does not mean, as many writers have assumed, that the lipid in question belongs to the carbohydrate-containing glycolipid (cerebroside) group.

Therefore, Little patches and blue- violet.

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How do consumers use the sun to get their energy?

Answers

The producers use photosynthesis to make glucose(their food). The consumers get their energy from eating producers. Consumers cannot use the sun directly for energy.

Which of the following is(are) true about ribosomes? Select all that apply. They are found free floating in the cytoplasm. They are the site of production of carbohydrates. They are found on the surface of the smooth endoplasmic reticulum. They are the site of protein synthesis.

Answers

They are found free floating in the cytoplasm & They are the site of protein synthesis

They are found free floating in the cytoplasm & They are the site of protein synthesis

forensic odontologists might be involved in which of the following circumstances?
a: a femur bone is found in a field
b: a victim has a bite on his arm
c: a profile of a suspect is needed
d: beetles are collected from a decomposed body

Answers

Answer:

A victim has a bite on his arm

Explanation:

took the test and got it right

After researching the rock they found, Mary and Jim believe it contains large pieces of the mineral limonite. They observed that their rock was yellow in color. And, according to the data they gathered, limonite is also yellow. They plan to conduct an investigation using the scientific method. Part A What is Mary and Jim’s hypothesis?

Answers

The definition of a hypothesis is a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation. therefore this means that there hypothesis is that the stone is limonite  because limonite is also yellow.

For each picture shown, choose the level of organization depicted.

Answers

Answer:

1. cell

2. organ system

3. tissue

4. organ

Explanation:

I had the same question and got these answers and they were registered as correct  

Hopefully this helps you

pls mark brainlest

1. cell

2. organ system

3. tissue

4. organ

What is cell?

"A cell is defined as the smallest, basic unit of life that is responsible for all of life's processes.” Cells are the structural, functional, and biological units of all living beings. A cell can replicate itself independently. Hence, they are known as the building blocks of life

What defines an organ system?

An organ system is defined as a group of organs that work together to perform bodily functions. For example, the organs in the gastrointestinal (GI) system each play a unique, important role in food digestion.

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Which organelle transports material throughout the cell?
Cell Membrane
O Endoplasmic Reticulum
O Mitochdadria
O Lysosome
o

Answers

Answer:

lysosome I think.

Explanation:

Fox is related to cunning, as leaf is related to
1. Calcium
2. hub
3. sap
4. crump​

Answers

I'm sure it's 1, Calcium .

How many meters per hour did marica run?

Answers

how many meters per hour did marica run ? 12,600

Which best describes the relationship between temperature and dissolved oxygen in a lake?
As temperature increases, dissolved oxygen increases.
As temperature increases, dissolved oxygen decreases.
As temperature decreases, dissolved oxygen decreases.
A change in temperature has no
effect on dissolved oxygen.

Answers

Explanation:

Air and Water Temperature Increases

For example, increases in water temperatures are expected to result in the following: Lower levels of dissolved oxygen due to the inverse relationship that exists between dissolved oxygen and temperature. As the temperature of the water increases, dissolved oxygen levels decrease.

Where does photosynthesis happen the fastest and the slowest?

Answers

Answer: It's basically fastest when white light hits and when yellow, red and green light hits it's at its lowest

Explanation: i hope this helped

Need help emt class

Answers

Answer:

3.

ExplaA bilateral hip replacement, for instance, replaces both hip bones in the same operation.

4. The immune system

marks me as brainiest.

say thanks

where does the word atom come from​

Answers

Answer:

greek word atomos which means invisible a- means not and -tomos means cut

Explanation:

Explanation:

Greek philosophers such as Democritus and Epicurus suggested that matter is made up of tiny indivisible particles called atoms. The word atom is derived from the Greek word atomos, which means indivisible or uncut.

Many cells make and use an enzyme, called catalase, to facilitate the decomposition of hydrogen peroxide (H2O2). The products of the decomposition are hydrogen (H2) and oxygen (O2).

Which of these changes to the cell would cause the greatest reduction in the activity of catalase?


A)
a decrease in the concentration of hydrogen and oxygen

B)
an increase in the concentration of hydrogen peroxide

C)
an increase or decrease in pH beyond normal range

D)
a return of pH to the normal range

Answers

Answer:

B an increase in the concentration of hydrogen peroxide.

Explanation:

When writing a hypothesis in this class, an if... and... then... statement is
used. What is written after the if?
Controlled Variable
Independent Variable
Dependent Variable
Constant

Answers

Independent variable ex) if I water the flowers each day(independent) then they will grow faster(dependent)

When blood glucose levels are high and the glucose is not utilized for cellular respiration, the human body will store this glucose in the liver and muscles. In what form is this glucose stored?
A) glycogen
B) maltose
C) starch
D) sucrose
When blood glucose levels are high and the glucose is not utilized for cellular respiration, the human body will store this glucose in the liver and muscles. In what form is this glucose stored?
A) glycogen
B) maltose
C) starch
D) sucrose

Answers

Answer:

a and d ok

Explanation:

hello

what are several defenses that keep pathogens from getting inside the body

Answers

Answer:

The body has two lines of natural defense to protect against infection. The first are physical barriers, such as the skin, body secretions and mucous membranes. The second line of defense is the immune system. Specialized immune cells coordinate and execute attacks to kill germs that make it past the body's physical barriers.

How are decomposers important to the health of an ecosystem?
A. Decomposers recycle nutrients.
B. Decomposers convert solar energy to chemical energy.
C. Decomposers provide the foundation for the food web.
D. Decomposers are parasites.

Answers

It should be decomposers recycle nutrients

Answer:

Decomposes recycle nutrients

Explanation:

Ape-x

Where is the spine ? i want the answer

Answers

Answer:

in your back

Explanation:

Answer/Explanation:

The spine is located in the person's back. It is right along the midline and is split in half when looking at the sagittal plane. Although some people have spinal issues which can cause it to be dislocated.

Hope that helps and have a great day!

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