If a DNA molecule had a total of 1000 nucleotides and 200 of these are adenines, then the total number of pyrimidines is 500. Adenines (A) are purine bases.
DNA is a double helix molecule composed of two long chains of nucleotides that are held together by hydrogen bonds.
In DNA, there are four types of nucleotides, each containing one different nitrogenous base: Adenine (A), Guanine (G), Cytosine (C) and Thymine (T).
Adenine (A) and guanine (G) are purines, whereas cytosine (C), thymine (T), are pyrimidines.
According to the base pair rules, Adenine always pairs with Thymine, whereas Guanine pairs with Cytosine.
In this case, the number of A + T is equal to 400 (200 + 200) and the number of G + C is 600 (300 + 300), thereby the number of pyrimidines or C + T is equal to 500 (200 + 300).
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Please help I am confused between option (b) and (c)
Answer:
option B
Explanation:
the cell is nucelated
descibe 3 impact due climate change
Answer:
Ice melting habitat lossHeating and cooling of the earth's atmosphereWhat structure within the eye could cause distortions?
At plasma glucose levels of greater than 300 mg/100 mL plasma, what happens to the glucose that is not reabsorbed
Answer:
I think it's gets stored up in the liver
Explanation:
Something's including glucose that are in access in the body gets stored up in the body
The magic word is:
A) Ostoma
B) cristae
C) chemiosmosis
D) chromosome
E) aneuploidy
F) gene
G) meristem
H) zygote
Answer:
What is this off of, can you give me more information so I can help you
Explanation:
Compare the population growth rate in industrially developed countries to that in developing countries
Answer:
The worlds developing regions will see 1.2 billion people added, a 20.7% increase; while the population of developed countries will increase a mere 3.3% adding 41 million to the current 1.3 billion people. ... There is a difference of more than ten years between the median age in developing and developed regions.
The population growth rate in industrially developed countries is much lower than that in developing countries.
The population growth rate is the number of births per 1,000 people in a population in a year. The population growth rate in industrially developed countries is typically around 1%, while the population growth rate in developing countries is typically around 2%.
There are several reasons why the population growth rate is lower in industrially developed countries. First, people in industrially developed countries tend to have fewer children. This is due to a number of factors, including the availability of birth control, the increasing participation of women in the workforce, and the rising cost of raising children.
Second, people in industrially developed countries tend to live longer. This is due to advances in medicine and healthcare. As a result, the number of people in the population who are of childbearing age is lower in industrially developed countries than in developing countries.
The lower population growth rate in industrially developed countries has a number of implications. First, it means that the population in these countries is aging. This is because the number of people who are of working age is shrinking, while the number of people who are retired is growing.
Second, the lower population growth rate means that there is less pressure on resources such as land, water, and food. This can help to reduce poverty and improve the standard of living in these countries.
However, the lower population growth rate also means that there is a smaller pool of workers to support the economy. This can lead to labor shortages and economic problems.
Overall, the lower population growth rate in industrially developed countries has both positive and negative implications. It is important to carefully consider these implications when making policy decisions.
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57- From classes of Phylum: Annelida
A- Cestoda
B- "Trematoda
C- Myriapoda
D- Oligochnota
Answer:
D- Oligochnota.
......
using example, explain the concept of homeostasis
Answer:
Homeostatis: maintenance of constant internal environment (optimum temperature or optimum optimum osmotic concentration) that permits all the biochemical reactions and physiological functions to proceed with maximum efficiency.
▪For example, when we exercise, there is heat production in the body and the body temperature rises which gets detected by the nerve sensors present in the body and the temperature control system in the brain is activated. It then activates sweat glands that helps in bringing the body temperature back to normal.
Explain why water is essential for the light reactions.
Answer:
During the process of photosynthesis, six molecules of carbon dioxide and six molecules of water react in the presence of sunlight to form one glucose molecule and six molecules of oxygen. The role of water is to release oxygen (O) from the water molecule into the atmosphere in the form of oxygen gas (O2).
Explanation:
Water is important for photosynthesis because it the source of hydrogen for the sugars created through photosynthesis
HOPE THIS HELPS PLS MARK ME BRANLIEST
The closing on your ad gives details about your services.
True
False
Answer:
True
Explanation:
In the closing, often a brief explanation is given on the company's name what they do how u can contact them and maybe some other information
P.s I do not take this subject
What are the two reasons why viruses have such small genomes. (Select both correct options) Viruses have fewer genes than living organisms. Increased selection for multiple chromosomes in viruses Viruses utilize a variety of genetic material for their genome Viruses have very little non-coding DNA
Answer:
WITHDRAWN
The publisher has withdrawn permission for online, public display of this title via the NLM Literature Archive. For additional information, please contact the publisher.
Two reasons for which viruses have such small genomes include 'viruses have fewer genes than living organisms' and 'viruses have very little non-coding DNA'.
What is the genome?The genome is all the genetic material present in the cells (either somatic or geminal cells) of an organism.
In eukaryotic organisms, the genome is big because it contains many genes required to synthesize different cellular components.Moreover, the eukaryotic genome also contains many non-coding regions, which are laking in smaller simpler genomes.In conclusion, two reasons for which viruses have such small genomes include 'viruses have fewer genes than living organisms' and 'viruses have very little non-coding DNA'.
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What's biology?
Biology is a natural sciences that deals with the study of living things.
Answer:
True
Explanation:
You study plants, animals, and cells in biology if I'm not mistaken.
Which one of the following fuels directly produces CO2 but is considered carbon neutral?
Question 2 options:
a)
Wind
b)
Biomass
c)
Oil
d)
Coal
e)
Hydropower
Answer:
A. wind
B. coal
Explanation:
there are two fuels directly produces CO2 but is considered carbon neutral which are wind and coal
What is the genetic makeup of offspring resulting from mitosis?
What is the characteristic of tropical rainforest?
Explanation:
The tropical rainforest biome has four main characteristics: very high annual rainfall, high average temperatures, nutrient-poor soil, and high levels of biodiversity (species richness)How many iodine atoms are in a molecule of the compound carbon
tetraiodide?
A. 4
B. 5
C. 6
D. 3
Awnser:
6
Explanation:
it Is 6 because their is 2 electrons on the inside and 4 electrons in the outside
Answer: its 4
Explanation:
Which statement describes how basic DNA technology is used to construct recombinant DNA molecules? (10 points)
A. Scientists use a gel-filled electrical chamber during gel electrophoresis to isolate DNA fragments.
B. Scientists use restriction enzymes to cut DNA molecules and ligation to paste DNA fragments together.
C. Scientists use heat and bacterial
transformation to add novel DNA into bacterial cells.
D. Scientists use high temperatures to separate strands of DNA molecules during polymerase chain reaction.
The statement 'Scientists use restriction enzymes to cut DNA molecules and ligation to paste DNA fragments together' describes the construction of recombinant DNA molecules. This technology is called recombinant DNA.
Recombinant DNA is a genetic engineering approach by which scientists uses specific enzymes to cut and paste nucleotide (DNA) target sequences of interest.
The enzymes that recognize and cut DNA are called restriction enzymes, while enzymes that ligate DNA fragments are called ligase enzymes.
Recombinant nucleotide sequences are placed into specific vectors (e.g., a plasmid) that transport the DNA in a host cell in where this sequence is expressed as protein.
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Which of the following correctly describes one way that cellular respiration contributes to the carbon cycle?
Choose 1 answer:
Choose 1 answer:
(Choice A)
A
Cellular respiration breaks down carbon-based molecules and releases oxygen into the atmosphere.
(Choice B)
B
Cellular respiration takes carbon dioxide from the atmosphere and uses it to make carbon-based molecules that are stored as biomass.
(Choice C)
C
Cellular respiration helps move carbon from the bodies of living organisms into the atmosphere.
Answer:
Choice A
Explanation:
Recall that trees release oxygen as a byproduct of photosynthesis. And you need oxygen to breathe. Do you know why? So your cells can perform cellular respiration and make ATP.
Cellular respiration contributes to the carbon cycle as cellular respiration helps move carbon from the bodies of living organisms into the atmosphere.
How does cellular respiration contribute to the carbon cycle?
During cellular respiration, organic molecules are broken down using oxygen molecule and carbon dioxide is released into environment.
This carbon dioxide is used by plants during photosynthesis and they synthesize organic matter.
This is how respiration contributes to carbon cycle.
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Which of the following substances can cause atherosclerosis and should be eliminated from the diet for health reasons?
A. butter
B. olive oil
C. liver, kidney or animal organs
D. avocado, liver and kidney
Answer:
A. butter
Explanation:
Draw a model that correctly illustrates cellular division and differentiation in stem cells...
What should I draw?
Answer:
I dotnt know that but you can do that
Cellular division (Mitosis) is the biological process whereby a parent cell breaks itself into different parts called daughter cells.
This process is important because it helps to divide cells so that they can:
Experience growth Repair broken cells Reproduce, etc
Cellular differentiation is the process of a cell going from one form to a more specialized cell.
A good example of this is the process of a fetus being formed from a single celled zygote.
Attached below is an image of cell differentiation and cellular division.
aside from the hard-boiled egg, what other things can you compare to the earth's interior layer
Answer:
The Avocado because its seed represents its core and the avocado meat represents the mantle and the skin of the avocado represents the crust
Explanation:
Hope it Helps
Answer:
An Avocado can be another example
Explanation:
What is the food web for Altamaha shiner ?
Answer:
The bottom of the pyramid was fertilizer or something and the little top triangle was a silhouette of a man. Those were simple days and the food chain seemed simpler.
Explanation:
If all burning of fossil fuels was stopped today, why will temperatures continue to rise? A) Fossil fuel emissions are not responsible for the enhanced greenhouse effect. B) Greenhouse gases remain in the atmosphere for many years. C) Deforestation must also be stopped in order for temperatures to decline. D) Increased methane emissions will more than make up for the difference.
Answer:
I think it's d)
Explanation:
What's your guess?
If the burning of fossil fuels was stopped immediately, the temperature still continues to rise because of the green house gases which remain in the atmosphere for many years. Thus, the correct option is B.
What causes global warming?Global warming is the increase in the temperature of the planet as a whole due to many factors such as burning of fossil fuels, deforestation, pollution, increase in green house gases, etc.
Global warming lead to the depletion of ozone layer and affect the air quality which can cause various diseases. If the burning of all fossil fuels was stopped today, the temperature of the planet still continues to rise because of the green house gases which remain in the atmosphere for many years. These are the heat-trapping gases.
Therefore, the correct option is B.
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una característica que se puede observar o medir sin cambiar la composición de la materia es una propiedad química ¿cierto o falso ?
Answer:
Falso, una propiedad química cambia no solo su apariencia, sino que la cambia por completo. Por ejemplo, la madera sigue siendo madera hasta que la pones al fuego y QUÍMICAMENTE se convierte en col. =)
Explanation:
the heart is an organ made from
Drag the correct RNA bases to their matching DNA bases.
Answer:
DNA and RNA bases are also held together by chemical bonds and have specific base pairing rules. In DNA/RNA base pairing, adenine (A) pairs with uracil (U), and cytosine (C) pairs with guanine (G).Which method of timber harvesting removes all trees from the harvest area?
2. According to the graph below, what temperature will result in the highest rate of photosynthesis?
1004 Oxygen flow (ml)
80
50
40
20
0
0
Temperature (1)
50
10
20
30
40
O A 5°C
OB. 40°C
O C.30°C
O D. 25°C
Answer:
At medium temperatures, between 50 and 68 degrees Fahrenheit, or 10 and 20 degrees Celsius, the photosynthetic enzymes work at their optimum levels, so photosynthesis rates gauge high. Depending on the particular plant in question, set the greenhouse thermostat to a temperature within this range for best
Mount St. Helens is a volcano that erupted with great force in 1980. Which phrase best describes this eruption?
Quiet eruption
Gentle lava flows
Magma low in silica
High viscosity magma
high-viscosity magma
have a good day :D
what regulates the growth and development of all the body cells