Answer: Meselson & Stahl reasoned that these experiments showed that DNA replication was semi-conservative: the DNA strands separate and each makes a copy of itself, so that each daughter molecule comprises one "old" and one "new" strand. The semi-conservative model, in which each strand of DNA serves as a template to make a new, complementary strand, seemed most likely based on DNA's structure. ... From the patterns of DNA labeling they saw, Meselson and Stahl confirmed that DNA is replicated semi-conservatively.
Explanation:
Describe DNA synthesis in detail
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.
Limestone formation in caves is considered what kind of weathering? A.mechanic B.chemical C.biological D.hydraulic
Which type of digestion takes place when chunks of food are physically torn into smaller pieces?
Absorption
Chemical
Elimination
Mechanical
Answer:
mechanical bc its physically
Explanation:
is the earth flat or not
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~
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.
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 relationship do the deer and rabbits have in common with the squirrels and chipmunks?
Answer:
b
Explanation:
Which statement below is an accurate claim that can be made based on the lizard table?
A The number of lizards always stays the same.
B The lizard population shifts from being mostly brown to being mostly red.
С The lizard population get more diverse as more generations go by.
D The lizard population shifts from being mostly brown to being most black.
!!
Answer: did you get the right answer ?
Explanation:
The statement is an accurate claim that can be made based on the lizard table, the lizard population shifts from being mostly brown to being mostly black. The correct option is D.
What is a population?The term “population” refers to all citizens who are either permanently residing in a country or who are just passing through. This indicator reveals how many people typically reside in a certain area.
Growth rates are the population changes that occur each year as a result of births, deaths, and net migration.
We can see in the table that the population of lizards or black lizards is increasing, and the brown lizard population is decreasing.
Therefore, the correct option is D. The lizard population shifts from being mostly brown to being mostly black.
To learn more about the population, refer to the link:
https://brainly.com/question/28542051
#SPJ2
how does a change in speed cause a wave to change direction
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.
In which division phase is the nucleolus formed and spindle fibers broken down?
A) anaphase
B) prophase
C) metaphase
D)telophase
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.
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
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 :)
Which idea is not in the correct position on the chart?
A. Biomass Fuels
B. Natural gas
C. Wind
D. Geothermal energy
*If you cant read the top of the chart it says:
Alternative Energy Sources | Fossil Fuels*
Answer:
Biomass Fuels, Geothermal energy
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:
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/s2The SI units for measuring force: Newton(N) The SI units for measuring mass: kgSURVIV.IO CODE
5GRV
NOWWW
Answer:
ight im in
Explanation:
scientists on mars have been investigating the genetic makeup of organisms in this community. use the information provided and your knowledge of genetics to answer the following questions.
Answer:
please where are the questions
Explanation:
Answer:
please provide the questions
Explanation:
What is the answer to that question
Answer:
D. Steps to use for doing the Heimlich maneuver
Explanation:
That's what the section is talking about.
pretty please answer!! giving brainliest to the one who is correct first!!!
most of the biomass in the ecosystem above would be found at the...
Answer:
A. Producers
Explanation:
Each level higher reduces by 10% so the bottom will have the most biomass.
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
Answer:
D. None of the above
Explanation:
I took the quiz.
Answer:
It's D. None of the above
Explanation: hope it helps ^w^
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
How can climate change impact on the ecosystem? Think of two different scenarios and describe them
Suppose the brown allele for eye color (B) is completely dominant over the blue allele for eye color (b). If two brown-eyed parents produce a child that is blue-eyed, what is the probability that at least one out of the next two children they produce will also have blue eyes
Answer:
The probability that at least one out of the next two children they produce will also have blue eyes equels 44%
Explanation:
Due to technical problems, you will find the complete explanation in the attached files
I will mark you brainlist!
What is the meaning of chaise?
A. A harness
B. A person
C. A vehicle
D. A farming tool
Answer: A ?
Explanation:
Answer:
C.
Explanation:
a horse-drawn carriage for one or two people, typically one with an open top and two wheels.
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
I know this might be selfish and all but I have a female and male rabbit and I am afraid the female rabbit is going to get pregnant I don't want her to get pregnant because rabbits have many kids what can I do to avoid my female rabbit veering pregnant?
Answer:
We did this with gerbils so basically separate their cages or kennels
Explanation:
If you really want to avoid pregnncy you can sterilize them...
what is the natural cause of wild fores
Explanation:
Naturally occurring wildfires are most frequently caused by lightning. Also, volcanic, meteor, and coal seam fires depending on the circumstances.
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
Answer:
lol i already have horses XD
Explanation:
www.biologycomer.com
10. At 100x, you will see a cell that is larger and has a dark shape in it. This cell doesn't look like the others because it is a
white blood cell and it functions to protect your body against microbes. Red blood cells do not have a nucleus. White blood cell
count is used as a diagnostic tool to determine if someone is sick. If you were fighting an infection, would you expect to have
more or less WBC's? Why?
Answer:
More
Explanation:
When your body needs more of a cell, it produces more of that cell. Since WBC’s (white blood cells) are used to fight infections, if you are sick you need more of them. Hope it helps :)
The characteristic of a muscle to be stretched is known as
O a. contractility.
b. extensibility.
c. elasticity.
d. excitability
Cohesion of water is produced by the interaction of numerous?
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.
Based on the figure above, _________ATP molecules are formed by fermentation.
a. 2 c. 36
b. 8 d. 38
Answer:
Hey!
The answer is:-
2 ATP molecules.