"the two strands of a dna double helix are held together by _____ that form between pairs of nitrogenous bases."

Answers

Answer 1
I think it's held by Hydrogen bonds
Answer 2

The two strands of a DNA double helix are held together by hydrogen bonds that form between pairs of nitrogenous bases.

What are the functions of DNA?

Deoxyribonucleic acid is a polymer composed of two polynucleotide chains that coil around each other to form a double helix. The polymer carries genetic instructions for the development, functioning, growth and reproduction of all known organisms and many viruses.

DNA is the information molecule. It stores instructions for making other large molecules, called proteins. These instructions are stored inside each of your cells, distributed among 46 long structures called chromosomes.

DNA is a complex, long-chained molecule that contains the genetic blueprint for building and maintaining all living organisms. Found in nearly all cells, DNA carries the instructions needed to create proteins.

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Related Questions

A physician may be virtuous (kind, just, and honest) and still not know:

Answers

A physician may be virtuous (kind, just, and honest) and still not know which actions are known as morally permissible. There are more ways to define "morally permissible." One is to break the words apart, to define "morally" and then "permissible." However, there is a more holistic way. In Ethics in the First Person, Deni Elliott defines permissibility thusly. Permitted [means] behavior that is within the bounds of the moral system.

Which actions help keep your digestive system healthy?

Answers

Take in a suitable amount of Fibre works. Fibre can stimulate the movement of intestine by adding bulk to our food. Fibre can prevent constipation.

Drink plenty of water and avoid fatty foods.



Birds and strawberries benefit each other. Strawberries provide food for the birds; the birds provide a way for strawberries to widely disperse their seeds. This kind of animal/plant interdependence is known as _____. commensalism mutualism parasitism dispersism

Answers

mutualism would be your answer :)

Answer: mutualism

Mutualism is a symbiotic relationship, between two organisms, living in close association with each other. In this relationship both the organisms gains benefit. Both organisms are dependent on each other for competing their life cycle.

The given situation is an example of mutualism because both the species are benefited for the relationship. Birds receive food from strawberries in turn birds disperse the seeds of strawberry to promote growth of more strawberry plants. Both organisms are interdependent on each other.

Tina's 5-year-old cousin comes into the clinic and you notice that her heart rate increases with inspiration and decreases with expiration. what is your differential diagnosis and treatment plan for this finding

Answers

Numerous kids have a cyclic example in which heart rate is quicker on motivation and abatements on termination. This is a sinus arrhythmia and is a typical finding in your kids. In the event that the patient isn't griping of any agony or shortness of breath, at that point, the in all probability treatment is not do anything. The specialist can propose a resound if there are side effects.

It is a normal situation in children in which heart rate increases with inspiration and decreases with expiration and is called Sinus Arrhythmia. If you find that child is not facing any serious problem then no treatment is required.

Further explanation

Sinus Arrhythmia

Respiratory sinus arrhythmia, in which heart rate increases with inspiration and decreases with expiration, isn't an anomalous mood and is most generally found in youngsters. Sinus arrhythmia is available when the P wave morphology is ordinary and predictable and the P-P interims fluctuate by in excess of 120 milliseconds. Nonrespiratory sinus arrhythmia, in which phasic changes in sinus rate are not identified with the respiratory cycle, can be complemented by the utilization of vagal operators, for example, digitalis and morphine; its mechanism is unknown.

Children and Arrhythmia

For childeren, the pulse, or a number of times a heart pulsates every moment, can change. Exercise, for instance, makes the heart beat all the more frequently, while the pulse backs off during rest.  

The "typical" pulse for a more established youngster or adolescent very still is around 70 beats for each moment. In a newborn child, the heart thumps 140 times each moment by and large.  

A few arrhythmias, or sporadic pulses, are ordinary. For instance, in numerous kids, the pulse accelerates while taking in, at that point backs back off while breathing out. This heartbeat variety with breathing is called sinus arrhythmia, and it's no reason for concern.  

In the event that your kid's primary care physician finds an arrhythmia, the individual in question will probably perform tests to find out additional. You could likewise prefer to a pediatric cardiologist, who works in heart issues in kids.

Treatment of sinus arrhythmia

If doctor finds unusual heartbeats, child feel weak and lightheaded, fainted then he will prescribe medicine. By realizing all that you can about arrhythmias, you can play a functioning job in your childcare. Also, rest guaranteed, a few treatment alternatives are accessible. Together, you and your kid's primary care physician can decide the correct game-plan.

Answer details

Subject: Biology

Level: High school

Keywords

Sinus Arrhythmia Children and Arrhythmia Treatment of sinus arrhythmia

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Explain why soft-bodied invertebrates, like slugs, die when you pour salt on them.

Answers

The process of osmosis is triggered and large amounts of fluid from inside the slug rush to the surface to restore equilibrium and dilute the concentration of salt. This results in the thick goo you see. The unfortunate slug rapidly loses more fluid than it can tolerate, and quickly dies from dehydration.
because the salt drys them up 

What is the primary difference between impersonation and masquerading?

Answers

One is more active, the other is more passive

The internal framework or stroma of organs such as the spleen, liver, and lymph nodes is made up of ________ tissue.

Answers

is made up of soft tissue

Final answer:

The internal framework or stroma of the spleen, liver, and lymph nodes is made up of reticular connective tissue, which is composed of reticular fibers forming a supportive mesh-like structure for these organs.

Explanation:

The internal framework or stroma of organs such as the spleen, liver, and lymph nodes is made up of reticular connective tissue. This tissue is mostly composed of reticular fibers that form a network or 'little net', supporting the shape and function of these organs. Reticular cells produce the reticular fibers that make up this mesh-like framework, which not only provides structural support but also serves as a scaffold for lymphatic and white blood cells.

Within the spleen, which is a component of the secondary lymphoid tissue, these reticular fibers support fixed macrophages and dendritic cells, as well as circulating B-lymphocytes and T-lymphocytes. This arrangement is essential for the spleen's function in filtering blood and capturing pathogens and antigens. Similarly, in lymph nodes, the reticular framework contains germinal centers rich in B and T lymphocytes, crucial for the immune response.

PLEASE HURRY!! 15 POINTS
What method would you use to assess the status of the biosphere on a global basis?

Answers

Capturing satellite images of chlorophyll if I'm not mistaken
Final answer:

The status of the biosphere can be assessed globally using remote sensing and biodiversity studies. Remote sensing involves using satellite technology to track environmental and biological conditions, while biodiversity studies involve detailed analysis of the variety of life in different regions.

Explanation:

To assess the status of the biosphere on a global basis, scientists and researchers could use a method called remote sensing. This involves satellites and radars that monitor conditions on Earth, providing important data on global indicators. For example, NASA's Earth Observing System tracks parameters such as temperature, humidity, vegetation, carbon dioxide and other critical measurements. Data from remote sensing offers comprehensive, global information about environmental and biological processes in the biosphere.

Another method is through biodiversity studies. This involves counting, comparing and monitoring the variety of life, including plants, animals and microorganisms, in different areas of the biosphere. Many of these studies are conducted through field work, laboratory research and statistical analysis, all aiming to comprehend the dynamics of the biosphere.

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Amoebae move by crawling over a surface (cell crawling), which involves ________. amoebae move by crawling over a surface (cell crawling), which involves ________. assembly of microtubule extensions that vesicles can follow in the direction of movement reinforcement of the pseudopod with intermediate filaments growth of actin filaments to form bulges in the plasma membrane localized contractions driven by myosin and microtubules

Answers

Actin filaments are found in cells that form cytoskeletal structures. These are generally present below the plasma membrane. 

Amoebae move by crawling over a surface (cell crawling), which involves GROWTH OF ACTIN FILAMENTS TO FORM PSEUDOPODIA. Pseudopodium is a bulge in the plasma membrane towards the direction of movement.

How does light intensity and the rate of photosynthesis relate to the position of the sun, both during the day and during the year?

Answers

the more sun (day length) the more photosynthesis

Final answer:

Light intensity and photosynthesis rates are closely connected to the sun's position, which changes daily and seasonally due to Earth's tilt. Longer days in summer with more direct sunlight increase photosynthesis, while shorter, less intense light in winter decreases it. Plants use photoperiods, determined by sun position, to regulate vital processes like flowering and vegetative growth.

Explanation:

The intensity of light and the rate of photosynthesis are directly related to the position of the sun, which varies both during the day and throughout the year due to the Earth's tilt and orbit. During the day, the sun's position affects the angle at which sunlight strikes the Earth’s surface, which in turn affects the intensity of light. When the sun is directly overhead, the light intensity is greatest and can increase the rate of photosynthesis. In contrast, when the sun is low on the horizon, sunlight is less intense as it travels through a greater amount of the Earth's atmosphere, resulting in a lower rate of photosynthesis.

Throughout the year, the Earth's tilt causes variations in day length and the sun's trajectory across the sky. Summer days, having longer hours of daylight and a higher sun elevation, provide more light, thereby enhancing photosynthesis. Conversely, winter has shorter days with less intense light, reducing the photosynthetic activity of plants. The photoperiod, or the duration of daylight, is a crucial indicator that plants use to sense seasonal changes and adjust their growth cycles accordingly. Plants detect these changes through a phytochrome system which involves the conversion of phytochrome molecules between different forms in response to red and far-red light found in sunlight.

For example, short-day plants flower when nights exceed a critical length, which occurs in late summer or early fall, whereas long-day plants flower in spring when nights are shorter than a critical length. This demonstrates how light intensity and day length, governed by the position of the sun, play essential roles in the life cycle of plants.

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In ____________ , signals pass through a cell junction from one cell to adjacent cells.

Answers

The answer should be NEURONES (nerve cells).
Neurons transmit electrical signals called NERVE IMPULSES from the cell body through the axon to the end plate. The junction between the end plate and the adjacent cell is called SYNAPSE. impulses passes through the synapse by diffusion of chemicals.

Which is not a high-level radioactive waste? contaminated clothing fuel rods reactor coolant control rods

Answers

Answer:

A) contaminated clothing

Explanation:

You can safely treat and dispose of clothing contaminated with low-level radioactive waste by following specific guidelines. Highly radioactive nuclear reactor waste requires deep geological disposal due to its extreme radioactivity. You can dispose of radioactive waste, including contaminated clothes, gloves, and tools, by incineration, compaction, or burial at approved facilities.

 

In contrast, high-level waste remains radioactive for thousands of years and requires secure storage facilities. Regular monitoring and containment are necessary to prevent leaks and contamination. This includes nuclear fission waste components, such as reactor coolant and spent fuel. This hazardous waste poses a threat to both humans and the environment.

Mishandling this waste could result in permanent damage.Strict laws and standards ensure the safe handling and disposal of high-level nuclear waste. Specialized facilities separate this waste from the environment to minimize radiation exposure. Additionally, research is underway to find more sustainable and effective ways to handle high-level nuclear waste.

When using a rock hammer to take a sample of a rock in the field, which of the following pieces of safety equipment should you use?

A.
ear plugs
B.
heat-resistant gloves
C.
eye goggles
D.
apron

Answers

C. eye goggles

Imagine getting that stuff in your eye. Ouch.

The nurse recognizes that which patient condition is associated with a sweat chloride level of 75 mmol/l and chromosome 7 mutation's effect on the development of bone?

Answers

Cystic fibrosis (CF)

Cystic fibrosis is a genetic disorder caused by a mutation of the cystic fibrosis transmembrane conductance regulator (CFTR) gene in chromosome 7. This disorder mostly affects the lungs, and may affect other organs such as liver, kidneys, intestines, and pancreas as well.

Patients mostly suffer from difficulty breathing, frequent lung infections, and from a buildup of thick mucus in the lungs, pancreas, and other organs. Patients with CF often have "salty skin," with sweat chloride levels greater than 60 mmol/L (in comparison to the normal concentrations of <40 mmol/L). 

Sections of dna that code for a particular protein are called _____.

Answers

The answer would be "genes".

Sections of DNA that code for a specific protein are called genes. These genes contain codons, which are sequences of three nucleotides that specify individual amino acids, essential for creating proteins.

Sections of DNA that code for a particular protein are called genes. A gene is the specific section of DNA required to produce one protein. The information to make proteins, which are crucial for various cellular functions, is stored in an organism's DNA. Proteins are made up of hundreds or thousands of amino acids, and the genes that code for these proteins are typically hundreds or thousands of base pairs in length. Within the gene, sequences of nucleotides consisting of adenine (A), cytosine (C), thymine (T), and guanine (G), known as codons, specify the amino acids. Each codon is a sequence of three nucleotides that corresponds to a specific amino acid or a start or stop signal for protein synthesis.

The nurse is reviewing aspects of cultural care. which statements illustrate proper cultural care? select all that apply

Answers

The question is missing the options, here are the options for the above question:

A. Examine the patient within the context of one's own cultural health and illness practices.

B. Select questions those are not complex.

C. Ask questions rapidly.

D. Touch patients within the cultural boundaries of their heritage.

E. Pace questions throughout the physical examination.

 

The correct choices are “B, D, and E”.

Complex questions may not be responded in satisfactory ways due to cultural variations and touching patients have various boundaries as in every cultural heritage that is different and finally pacing the question throughout the examination may help patient get better care.

How can plants and animals affect neighboring cells directly?

Answers

Plants and animals affect neighboring cells directly because when in terms with the plants, they use their plasmodesmata in which allowed them to communicate and affect neighboring cells. While the animals use their gap junctions that is use for them to communicate and affect their neighboring cells.

Answer;

Through Plasmodesmata in plants and Gap Junctions in animals.

Explanations;Plants contains structures called plasmodesmata .Plasmodesmata are open channels that are located in the cell walls of plant cells. Plasmodesmata allow cells to communicate with the neighboring cells. Animals on the other hand contain structures called Gap junctions in their cells.Gap junctions functions to connect cells to neighboring cells. Therefore; both plasmodesmata and gap junctions allow signaling substances dissolved in cytosol to pass freely between adjacent cell.

Definition: vocabulary audio this is the stage of mitosis where chromosomes align in the middle of the cell before being separated into each of the two daughter cells.

Answers

The stage of mitosis where the chromosomes align in the center of the cell before splitting is metaphase.

If the victim of a toxicologic emergency vomits, an emt should _________.

Answers

If the victim of a toxicologic emergency vomits, an emt should observe the vomitus for fragments of pills or look for other signs to properly care for the victim.

What is the primary function of the phloem in vascular plants?

Answers

 Phloem is used primarily to transport nutrients such as sugar to all parts of the plant including roots
Xylem, on the other hand, primarily transports water and minerals up from the root to other parts of the plant.

Answer:

Phloem is the food transporting vesicles of a vascular plant

Explanation:

Phloem and Xylem together forms the vascular tissue. While Xylem transport fluid in the plant , phloem is responsible for transportation of soluble organic substances such as sugar, protein etc. Phloem transports food produced during the process of photosynthesis in leaves to all other non-photosynthesizing body parts such as stem and roots.  The food travels from the leaves to the roots with the assistance of gravity.  

The substance in phloem travel through the “sieve tube members” and “ companion cells” .

The constant balancing of an organism's energy-producing and its energy-using processes is called

Answers

It is called metabolism. 

Lard, butter, and cream are rich sources of ________. saturated fatty acids monounsaturated fatty acids polyunsaturated fatty acids trans fatty acids

Answers

These items are rich in saturated fatty acids. These are the items that are usually not healthful in the body in extraneous amounts, and can lead to health problems if consumed too regularly. These are the acids that will lead to plaque buildup in blood vessels when over-consumed.

A(n) __________ is a rule that describes a pattern in the natural world.

Answers

The answer would be the scientific law :))

Scientific law is a rule that describes a pattern in nature. Hope I helped!

What model organism did mendel use for determining the inheritance of traits?

Answers

mendel used the garden pea to determine the inheritance of traits.

To study osmosis, a student placed a thin potato slice in a salt solution. The slice became soft and shriveled. Then, he placed the shriveled slice in water. The slice regained its original shape. Based on the observations, which of these statements is correct?
A) The slice regained its shape because salt moved into the potato.
B) The potato slice shriveled because water moved from the salt solution into the slice.
C) The potato slice shriveled because water moved out of the slice into the salt solution.
D) The slice regained its shape because the concentration of salt inside and outside the slice became equal.

Answers

Osmosis is the movement of water from a region of higher water concentration to a region of lower water concentration across a selectively permeable membrane. Simply put, water passes across membranes into areas where more 'stuff' is dissolved.
In this system, The slice shriveled in salt solution. That means water left the potato's cells. Then the slice regained its shape when placed in pure water. That means water moved back into the cell. 
A) incorrect. Salt does not move across the membrane
B) incorrect. If water moved into the slice, it would have swelled, not shriveled
C) correct. Water moved out of the cell into the more concentrated salt solution
D)incorrect. Placing the slice in pure water does not balance the concentration of salt between the cells and the water.
the answer is c hope this help

The recognition that two different stimuli call for two different responses is known as ____.

Answers

The answer is discrimination. It is a way of showing differentiation in terms of other categories such as things, animals, people or anything that exist. In which is connected to the statement above as it differentiates stimuli of different responses.

helpppp???!

Which of the following waves, from the electromagnetic spectrum, have the highest energy?


Radio wave
Microwave
Visible light
Gamma wave

Answers

Gamma waves have the highest energy and can be extremely harmful. Hope this helped.
The highest energy wave is gamma, x-ray and the highest wave energey have the shortest wave length.

Consider this animal cell. Which organelle is responsible for producing the energy for cellular processes?

Answers

The Mitochondria is the "Power House of the cell." This shows that the Mitochondria creates energy (Composed of ATP)

Answer:

The mitochondria is the key player in the animal cell energy production because it has no other element as important to that function.

Explanation:

The mitochondria are present in both animal and plant cells, nevertheless, the plant cells also have chloroplasts that are the major factor in the creation of the energy in the plant cell. Meanwhile, the animal cell has no presence of chloroplasts and they only rely on the mitochondria to carry on their energy-related activities. Therefore the mitochondria are considered the major energy function contributor in the animal cell.

Certain amino acids are called essential because they ______.

Answers

Essential amino acids are amino acids that must be supplied to one's body by their diet because they cannot be synthesized from scratch. 

Certain amino acids are called essential because they cannot be synthesized from the scratch. There are nine essential amino acids.

What are the essential amino acids?

An essential amino acid or the indispensable amino acid is an amino acid which cannot be synthesized from that of scratch by the organism fast enough to supply its demand in the body, and must therefore come from the diet they eat. Out of the 21 amino acids which are common to all the life forms, the major nine amino acids include humans those who cannot synthesize include phenylalanine, valine, threonine, tryptophan, methionine, leucine, isoleucine, lysine, and histidine amino acids.

Foods which contain all the nine essential amino acids are called as complete proteins. These food components include beef, poultry, fish, eggs, dairy, soy, quinoa, and buckwheat.

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In three (3) sentences, explain the function of a vacuole in plant cells.

ANSWER:
A vacuole is used for temporary storage of water, waste products, food, and cellular material. Plants take in large amounts of water and need a place to store the water. Vacuoles are larger in plant cells than animal cells to store the water and other materials needed by the cell.

Answers

A vacuole is an organelle found in different forms of life (i.e., animal, plant, protist, fungi and bacteria). The plant vacuoles are filled with water containing both inorganic and organic compounds in solution.

The plant cells contain one or more vacuoles, which are membrane-bound structures (organelles) surrounded by a membrane called tonoplast.

In plant cells, the vacuole helps to provide structural support and plays diverse roles including storage of water, waste products and growth.

The plant vacuoles also serve for maintaining internal hydrostatic pressure within the cell and balancing the internal (acidic) pH.

In conclusion, a vacuole is an organelle found in different forms of life. The plant vacuoles are filled with water containing inorganic (salt) and organic (e.g. enzymes) substances in solution.

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Final answer:

A vacuole in plant cells serves as a storage area for water, nutrients, and wastes, maintains turgor pressure to support the plant's structure, and plays a role in protecting the plant from herbivory. It can occupy up to 90% of a plant cell's volume and is essential for the plant's responsiveness to water availability, contributing to cell expansion and wilting depending on environmental conditions.

Explanation:

The function of the vacuole in plant cells is multifaceted, primarily involving storage and maintenance of internal pressure. A large central vacuole is a signature feature of plant cells, taking up to 90% of the cell's volume, and it is crucial for storing water, nutrients, and waste products. Additionally, the central vacuole helps maintain turgor pressure, which supports the cell structure and is vital for plant rigidity and overall health.

By regulating the water balance within cells, the vacuole plays a key role in cellular function, particularly in changing environmental conditions. When a plant lacks water, the vacuole will release some of its water content, causing the plant to wilt due to loss of turgor pressure. Furthermore, the vacuole is involved in the storage of pigments that color flowers and has a role in deterring consumption by animals and insects due to the bitter taste of the fluid within.

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