Based on DNA's structure and function, why did Meselson and Stahl
choose to grow E. coli in broths of nitrogen isotopes?
A. The bacteria's phosphate groups would be replaced by the
nitrogen.
OB. The nitrogen would be incorporated into deoxyribose.
C. The nitrogen would influence bonding between base pairs.
D. The nitrogen would be incorporated into the DNA
nucleotides

Answers

Answer 1

Answer:

Ecoli has certain istopyes in where the molecules such as carbon dioxide re introduces the carbon molecules therfore ecoli has certain phosphate groups.

Explanation:


Related Questions

How do landfills impact groundwater? A. litter
B. Sharp metal and glass get in the soil.
C. Liquids leak into the ground.
D. Landfills do not impact groundwater.

Answers

Answer: c. Liquids leak into the ground

Explanation:

what type of organism is Eospirifer?

Answers

Answer:

Its a fossil that is in the section of Rhynchonellata

The characteristic of a muscle to be stretched is known as
O a. contractility.
b. extensibility.
c. elasticity.
d. excitability

Answers

please mark brainlist

b. extensibility

the characters of a muscle to be stretched is known as extensibility

I will mark you brainlist!

What is the meaning of chaise?

A. A harness

B. A person

C. A vehicle

D. A farming tool

Answers

Answer: A ?

Explanation:

Answer:

C.

Explanation:

a horse-drawn carriage for one or two people, typically one with an open top and two wheels.

SURVIV.IO CODE

5GRV

NOWWW

Answers

Answer:

ight im in

Explanation:

Describe DNA synthesis in detail

Answers

Answer:

DNA synthesis is the biological process by which a deoxyribonucleic acid (DNA) molecule is created. In the cell, each of the two strands of the DNA molecule acts as a template for the synthesis of a complementary strand.

Answer:

The discovery of the double-helical nature of DNA by Watson & Crick explained how genetic information could be duplicated and passed on to succeeding generations. The strands of the double helix can separate and serve as templates for the synthesis of daughter strands. In conservative replication the two daughter strands would go to one daughter cell and the two parental strands would go to the other daughter cell. In semiconservative replication one parental and one daughter strand would go to each of the daughter cells.

Through experimentation it was determined that DNA replicates via a semiconservative mechanism. There are three possible mechanisms that can explain DNA's semiconservative replication.

(a) DNA synthesis starts at a specific place on a chromosome called an origin. In the first mechanism one daughter strand is initiated at an origin on one parental strand and the second is initiated at another origin on the opposite parental strand. Thus only one strand grows from each origin. Some viruses use this type of mechanism.

(b) In the second mechanism replication of both strands is initiated at one origin. The site at which the two strands are replicated is called the replication fork. Since the fork moves in one direction from the origin this type of replication is called unidirectional. Some types of bacteria use this type of mechanism.

(c) In the third mechanism two replication forks are initiated at the origin and as synthesis proceeds the two forks migrate away from one another. This type of replication is called bi-directional. Most organisms, including mammals, use bi-directional replication.

is the earth flat or not

Answers

Answer:

its not flat

Explanation:

Answer:

Hello There!!

Explanation:

The Earth is not flat but it is round.

hope this helps,have a great day!!

~Pinky~

QUESTION 12

neuronal pool that might rely on fatigue to end its impulse propagation is a:
A. converging circuit
B. diverging circuit
C. oscillating circuit
D. parallel after-discharge circuit
E. circuit breaker

Answers

Parallel after-discharge circuit

Which type of digestion takes place when chunks of food are physically torn into smaller pieces?

Absorption
Chemical
Elimination
Mechanical

Answers

mechanical digestion
occurs in mouth

Answer:

mechanical bc its physically

Explanation:

Limestone formation in caves is considered what kind of weathering? A.mechanic B.chemical C.biological D.hydraulic

Answers

Chemical I think pretty sure

most of the biomass in the ecosystem above would be found at the...

Answers

Answer:

A. Producers

Explanation:

Each level higher reduces by 10% so the bottom will have the most biomass.

Different measurements are expressed in different units. Cheese the corect si units for the following types of
measurement

The SI units for measuring the velocity of the car

The SI units for measuring the acceleration of the cars

The SI units for measuring force:

The SI units for measuring mass:

Answers

Answer:

The SI units for measuring the velocity of the car is "M/s"

The SI units for measuring the acceleration of the cars is "M/s2

The SI units for measuring force: Newton(N)

The SI units for measuring mass: kg

Based on the figure above, _________ATP molecules are formed by fermentation.

a. 2 c. 36

b. 8 d. 38

Answers

Answer:

Hey!

The answer is:-

2 ATP molecules.

how does a change in speed cause a wave to change direction​

Answers

When a wave enters a new medium at an angle, one side of the wave changes speed before the other side. This causes waves to bend. Bending occurs because the different parts of the wave travel at different speeds.

Answer:

Refraction is an effect that occurs when a light wave, incident at an angle away from the normal, passes a boundary from one medium into another in which there is a change in velocity of the light. ... The wavelength decreases as the light enters the medium and the light wave changes direction.

Hey, WHo loves horses soooooooooooooo much, That they want to pursue a career in them. Who wants to make some extra cash. I have a job for you! plese let me know fast

Answers

Can you do my physics hw

Answer:

lol i already have horses XD

Explanation:

what is the natural cause of wild fores

Answers

Explanation:

Naturally occurring wildfires are most frequently caused by lightning. Also, volcanic, meteor, and coal seam fires depending on the circumstances.

pretty please answer!! giving brainliest to the one who is correct first!!!

Answers

A box of butter sticks

Fruiting Bodies of Fungi The recognizable forms of fungal reproductive bodies, or fruiting bodies, encountered in nature vary structurally. Common forms of fungal fruiting bodies include trumpet, club fungus, bracket, cup fungus, gill fungus, bolete, puff ball, and stinkhorn. Close observation of fruiting body anatomy can lend clues during identification of a species. Differing species of fungi can appear similar, and it is never advised to eat a wild mushroom because poisonous varieties can resemble edible ones.
1. Fungal fruiting bodies, or reproductive bodies, have different structural forms.
a. true
b. false
2. Many experiments require student-supplied items, such as _____.

Answers

Answer to Question 1:

True

Explanation

As indicated in the passage, fruiting bodies of fungi differ structurally. However, different species can appear to be similar and often misleading thus creating the risk of food poisoning.

Question 2:

Many experiments require student-supplied items, such as _____.

1. Chicken

2. Fresh flowers

3. Distilled water

4. All of the Above.

Answer to Question 2:

The correct answer is 3.

Explanation

Water comes in varying degrees of purity. When water that contains other substrates or impurities is used for an experiment, it distorts the results and creates errors. So the scientist's ability to determine the root of a problem becomes enervated.

Using distilled water impurities removes the possibility of such an error. Distilled water is also used for cleaning laboratory equipment.

Cheers

In which division phase is the nucleolus formed and spindle fibers broken down?
A) anaphase
B) prophase
C) metaphase
D)telophase

Answers

Answer:

Prophase

Explanation:

During prophase, the nuclear envelope and nucleolus are dissolved and the chromosomes condense. The centrioles and spindle fibers begin to form at opposite poles of the cell.

Answer:

telophase

Explanation:

Spindle fibers disperse as the chromosomes are separated and become housed within two new nuclei.

Andrew did a mutant screen with his favorite bacterium that he used for marine phage hunting. He identified three base-substitution mutations on the bacterial recA gene:

Mutant A: A base substitution occurred, which changed T to C, and consequentially abolished transcription of the recA gene.
Mutant B: A base substitution, which changed codon 2 from ACC to ACT, which did not change encoded amino acid.
Mutant C: A base substitution occurred, which changed codon 3 from TCA to a stop codon TGA.

Based on the above info, which of the mutants would still have functional RecA protein?

a. Mutant B
b. Mutant A
c. Mutant C

Answers

Answer:

a. Mutant B

Explanation:

This question is describing a kind of mutation called SUBSTITUTION MUTATION, in which one or more nucleotide base is replaced by another in a sequence. In this case, the base-substitution mutations occcurs in the bacterial recA gene sequence.

However, base substitutions can be grouped into three based on the different results it yields namely: missense mutation, nonsense mutation, silent mutation.

- In Mutant A: A base substitution occurred, which changed T to C, and consequentially abolished transcription of the recA gene. This is an example of missense mutation because it changes the sequence.

- In Mutant B: A base substitution, which changed codon 2 from ACC to ACT, which did not change encoded amino acid. This is an example of silent mutation because it does not alter the sequence of the gene.

- In Mutant C: A base substitution occurred, which changed codon 3 from TCA to a stop codon TGA. This is an example of nonsense mutation because it leads to a STOP CODON.

According to the question, MUTANT B would still have functional RecA protein because it doesn't change the encoded amino acid sequence, which will still lead to the production of the RecA protein.

SER
Which of the following is not a contributing factor to environmental policy decisions?
a. human health
b. availability of natural resources
environmental health
d. none of the above
C.
Please select the best answer from the choices provided
Оооо

Answers

Answer:

D. None of the above

Explanation:

I took the quiz.

Answer:

It's D. None of the above

Explanation: hope it helps ^w^

How can climate change impact on the ecosystem? Think of two different scenarios and describe them

Answers

Increased heat, drought and insect outbreaks, all linked to climate change, have increased wildfires. Declining water supplies, reduced agricultural yields, health impacts in cities due to heat, and flooding and erosion in coastal areas are additional concerns.

7. A scientist is investigating using a chemical that will destroy lysosomes within cells.
A student presents an argument as to the importance of lysosomes. Which of the
following statements would be a valid justification to support the student's argument?
A. Lysosomes are needed to digest biomolecules
B. Lysosomes are needed to store energy
C. Lysosomes are needed to package proteins
D. Lysosomes are needed to synthesize proteins

Answers

Answer:

A

Explanation:

Lysosomes break down cell parts when needed, and can self-destruct the cell. Organelles are made of biomolecules, the building blocks of life. Therefore, A is the answer. Hope it helps :)

Will give brainliest
Below are two sequences of a segment of DNA.

Normal sequence CAT TAC ACC
Mutated sequence CTT TAC ACC

Which type of mutation has occurred?
Choose 1 answer:

A deletion is the removal of a nucleotide from a DNA sequence.


(Choice B)

B

Nonsense mutation


(Choice C)

C

Insertion mutation


(Choice D)

D

Substitution mutation

Answers

Answer:

D

Explanation:

CAT= CTT

A was substituted by T

It didn't stop, can't be B

It didn't add more letters to the sequence, can't be C

2. Which is a function of the cardiovascular system? *
convert oxygen and glucose into ATP (energy)
O convert oxygen into glucose
O carry oxygen and glucose to body cells
O store oxygen and glucose in the blood

Answers

carry oxygen and glucose to body cells
hope that helps!!

Cohesion of water is produced by the interaction of numerous?

Answers

Answer:

please give me brainlist and follow

Explanation:

In cohesion, water molecules are attracted to each other (because of hydrogen bonding), keeping the molecules together at the liquid-gas (water-air) interface, although there is no more room in the glass.

What relationship do the deer and rabbits have in common with the squirrels and chipmunks?

Answers

Answer:

b

Explanation:

Predation and parasitism are similar because in both predation and parasitism -
both organisms are harmed in some way.
one organism is harmed while the other benefits.
one organism is neither harmed nor benefits.
both organisms receive a benefit.

Answers

Answer: on organism is harmed while to the other benefits

Explanation:

Predation and parasitism are similar because, in both predation and parasitism, one organism is harmed while the other benefits. Therefore, option B is correct.

What are predation and parasitism?

The act of eating all or a portion of the body of another organism, the prey, is known as predation. Herbivory is the term for predatory behavior in which the prey is a plant.

When one creature, the parasite, feeds on another, the host, hurting or even killing the host, the connection is said to be parasitism. The parasite stays within or on the host's body. Tapeworms, fleas, and barnacles are a few examples of parasites.

Thus, predation and parasitism are similar because, in both predation and parasitism, one organism is harmed while the other benefits. Therefore, option B is correct.

Learn more about predation, here:

https://brainly.com/question/12410124

#SPJ6

Makali and his parents recently emigrated from the highlands of Papua New Guinea. His family is part of the famous Fore tribe; after living in the tribe for most of their lives, they decided to give Makali a different life in the United States. His mother starts to cry as she recalls that both her parents died in the kuru epidemic that made the tribe famous, and she is terrified that Makali might be coming down with kuru. His father interjects to say that it is not possible and that he is far more concerned that Makali has some other infectious disease to which he had never previously been exposed.

His father says that Makali had a severe allergic reaction to the tetanus/pertussis booster shot as a child and has been unable to be re-vaccinated due to the risk of anaphylactic shock. Therefore, Makali may be susceptible to whooping cough (pertussis). This would not have been a concern 10 years ago, but vaccination rates for whooping cough have plummeted in the United States, eliminating herd immunity and sparking a return of the disease in some regions. Ironically, vaccination rates in the Fore tribe are much higher than in the United States, so Makali's parents had concerns about coming to the United States, which is falling behind other countries in this area of basic medical care!

One of the doctors you are working with says that checking immunoglobulin (Ig) levels should reveal if there is a serious infection. He also points out that kuru does not cause immunoglobin levels to rise. If Makali does have kuru, a brain biopsy may be required to make a definitive diagnosis.

1. Select the next step or steps that would be appropriate to diagnose Makali?
a. Test immunoglobulin (IgG, IgA, and IgM) levels in the blood for signs of infection.
b. Perform a brain biopsy.
c. Interview one of Makali's friends to ask about the day he first became sick.

2. Which statement most accurately describes the citric acid cycle?
a. It is an unregulated process, like an intersection without signal lights.
b. It is the main center of ATP production during anaerobic metabolism.
c. It plays a central role in key metabolic processes in the cell, with many metabolic intermediates leaving and entering.
d. It serves a catabolic role only, which is to generate ATP and reducing equivalents for cellular energy needs.

Answers

Answer:

Explanation:

It is important we understand what is immunoglobulin test.

Immunoglobulins, also known as antibodies, are measured by the test carried out in the blood. Antibodies are proteins produced by the immune system to combat pathogens such as viruses and bacteria that cause disease. Immunoglobulins are proteins produced by the body to combat various substances.

The immunoglobulin assay tests three forms of immunoglobulins in total. IgG, IgM, and IgA are the three types of antibodies. IgG, IgM, and IgA levels that are too low or too high may indicate a severe health condition.

Thus, from the above question; the next step that would be appropriate is:

Assuming the test uncovers an increase in immunoglobulin, it demonstrates contamination or infection. Thus, a fitting treatment ought to be begun against the infection.  

However, suppose the text doesn't uncover an increase in immunoglobulin and assuming he shows manifestations of symptoms, then the brain biopsy ought to be performed to affirm the diagnosis of kuru.

(2)

The citric acid cycle is the metabolic center of the cell. It is the doorway to the aerobic metabolism of any molecule that can be changed into an acetyl group or a part of the citric acid cycle. The cycle is additionally a significant wellspring of prototype for building blocks of numerous different molecules like amino acid and nucleotide base.

Thus, the best accurate statement is: Option C

What is the answer to that question

Answers

Answer:

D. Steps to use for doing the Heimlich maneuver

Explanation:

That's what the section is talking about.

Other Questions
Which statement is true please help ASAP will give brainleast to correct answer plus thank you! A tow truck pulls a 7,800 N car 5m out of a ditch in 6.5 seconds. How much power does thetow truck have? Last month you purchased 6 individual songs and 1 albums for a total of $21.99. This month you spent a total of $44.97 on 4 individual songs and 3 albums. How much does each song and album cost A plane is flying at an altitude of 300 meters on a headingtowards both a maintenance hangar and the main runway.The pilot sights the end of the main runway atan angle of depression of 15. She then sights themaintenance hangar at an angle of depressionof 32. What is the distance between the end ofthe main runway and the maintenance hangar? What is the frequency of a light source that has a wavelength of 430 NM? What is the energy of this wave? What is the meaning of fable Lines that appear to be tangent are tangent. O is the center of the circle. What is the value of x? When and where does "Manuel and the Magic Fox" take place? Cite specific evidence from the story or make inferences drawn from the text to support your answer. How does the graph of g(x) = 10x 8 compare to the graph of f(x) = 10x?The graphs are the same.The graphs are translated upward 8 units.The graphs are translated downward 8 units.The graphs shift to the left 8 units. If dogs has 78 chromosomes in each somatic cell, how many chromosomes does each dog sperm have? Is it possible for 2 dog spend cells to simultaneously enter a dog egg? Why or why not? PLS HURRYWhich pharaoh of the New Kingdom did NOT build a tomb in the Valley of the Kings in Egypt? Where were Jews forced to live in German controlled cities? verify X + y equal to y + X when:x=-8/9and y=-3/5 True/False Schools in India's capital New Delhi closed for two days due to a spike in air pollution that triggered a public health emergency and prompted protests by residents and environmental groups. A.True B.False 1. What is ironic about the ending of the short story "Dirty Bird"?A. A character abandons his efforts to do the best thing for his family.B. A character realizes that he has ignored a possible solution to a problem.C. A character discovers that his behavior has upset someone he loves.D. A character tries to save something that is important to his daughter.2. Which statement best describes the purpose and effect of irony in "The Story of a Good Little Boy"?A. to remind readers of their own childhood experiencesB. to reveal an important lesson about human natureC. to cast doubt on the author's knowledge of boysD. to create a reason for readers to continue reading The coded information of a DNA molecule is determined by the A .sequence of amino acids. B .number of enzymes. C. sequence of sugar-phosphate units D. sequence of nitrogenous bases. What is the median of the data represented by the box plot? enter your answer in the box Help!! Select the statement that best describes what you might see on Broadway today.a. Commercial, Big Budget, Spectacle and /or star heavyb. Low Budget, Often original scripts, Experimental or Boundary-pushingc. Focus on sharing American theatre with local communities, off-stage artistic innovation 16ef8ef=24mn_____=2mn2k+k_____=4k