Answer: Unlike leading strands, lagging strands are synthesized as discrete short DNA fragments, termed 'Okazaki fragments' which are later joined to form continuous duplex DNA. Synthesis of an Okazaki fragment begins with a primer RNA-DNA made by polymerase (Pol) α-primase.
Explanation:
How can the role of epigenetics in cancer be reconciled with the idea that cancer is caused by the accumulation of genetic mutations in tumor-suppressor genes and proto-oncogenes
Answer:
Epigenetic mechanisms control the activity of genes involved in DNA repair pathways and cell growth
Explanation:
Epigenetics can be defined as the study of the alterations in gene expression patterns that do not involve alterations in the DNA sequence. Epigenetic mechanisms include 1-DNA methylation, 2-histone modifications (i.e., methylation, acetylation, phosphorylation, ubiquitination, etc.) and 3-non-coding RNA pathways (microRNAs, long ncRNAs, etc). These epigenetic mechanisms work together to control gene expression patterns by activating or silencing genes at the level of transcription, in a mode that is dependent on the cell type and developmental stage. In consequence, the failure of the epigenetic mechanisms modifies the activity of genes which may be involved in DNA repair pathways and thereby it may lead to severe disorders including some cancers.
what is the main function of nervous tissue? a: to transport materials and defend the body, b. send signals to control the body, c. contract the casue movement in the body, d. cover the body to protect other cells
Answer: to contract to cause movement in the body
Explanation:
AP*X
The main function of nervous tissue C. contract causes movement in the body.
What is the main function of the nervous system and how is it structured?The nervous system is a complex collection of nerves and specialized cells known as neurons that transmit signals between different parts of the body. It is essentially the body's electrical wiring. Structurally, the nervous system has two components: the central nervous system and the peripheral nervous system.
Conclusion: The nervous system is a highly integrated system. The nervous system has three overlapping functions based on sensory input, integration, and motor output. At a more integrative level, the primary function of the nervous system is to control and communicate information throughout the body.
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Why is it important that animals have different characteristics? Include at least two examples of animals and their characteristics.
Answer:
some animals have 4 legs and some have 2
Explanation:
1. Compare and contrast mitosis and meiosis. 2. What major event occurs during interphase?
Answer:
1.
contrast between mitosis and meiosis
Mitosis
- it takes place in somatic cells in multi cellular organisms in order to provide growth, however, in unicellular organisms it is reproductive division as well. is the means of reproduction in single-celled organisms. Other organisms use it for the growth of tissues (somatic cells)
- exact number of chromosome in offspring
- no recombination or crossing over
- no pairing found
- major phase: prophase, metaphase, anaphase, telophase
Meiosis
- takes place in sex cells to form gamete formation during sexual reproduction
- half of the chromosome number found in gametes of the parents thus, known as reduction division
- due to crossing over takes place recombination found.
The pairing of chromosomes takes place
- major steps:
Meiosis 1 – prophase, Metaphase, anaphase, Telophase, and
Meiosis 2: Prophase, Metaphase, Anaphase, and Telophase
2. Interphase takes place prior to both mitosis and meiosis which is divided into 3 sub phases-G1, S and G2 phases.
The major events are as follows:
G1- RNA and protein synthesis takes place and cell grows in size
S- DNA replication takes place, Centriole duplication occurs and synthesis of histone proteins.
G2- RNA and Protein synthesis continues.
Which of these is an environmental benefit of converting to solar energy?
O A. an increase in the use of fossil fuels
O B. a decrease in air pollution
O C. an increase in the cost of energy
O D. a decrease in electrical energy production
Answer:
i think it's the first one
The answer is B. a decrease in air pollution.
In a paternity testing case, a child's DNA was collected to see if it matched both parents' DNA. Which type of genetic material can be used for the DNA fingerprinting?
A. Coding DNA
B. Noncoding DNA
C. RNA
What two major events occur during meiosis that give the new cells genetic variation
Genetic variation is increased by meiosis
Because of recombination and independent assortment in meiosis, each gamete contains a different set of DNA. This produces a unique combination of genes in the resulting zygote. Recombination or crossing over occurs during prophase.
Which cellular structure in plant cells is most responsible for having less flexible animal cells
Answer:
The cellulose cell wall in plants
Explanation:
All eukaryotic cells, both plant and animals cells have a cell membrane which is an outer covering of the contents of the cell. Also plants and animals cells have many structures and cell organelles in common such as the mitochondria, the endoplasmic reticulum, ribosomes, golgi bodies, etc. However, plant cells have a more rigid structure than animals cells because of the presence of an extra structure known as the cell wall, covering their cell membranes.
The cell wall is a rigid layer that is found outside the cell membrane and surrounds the cell, providing structural support and protection. The cell wall is composed mainly of cellulose, but contains proteins as well as other polysaccharides too.
Another structure present in plants that serves to maintain the rigidity of the plant cell is the large central vacuole. The main role of the vacuole is to maintain turgor pressure by pushing the plasma membrane against the cell wall due to the pressure of fluids contained within it.
Which part of the brain is used to integrate incoming information and send it to the appropriate portion of the cerebrum?
Answer:
the Brarin that what it is
Which division has a single preganglionic neurons with many axon collaterals that forms 20 or more synapses with postganglionic neurons?
a. sympathetic motor division
b. parasympathetic motor division
c. sympathetic sensory division
d. parasympathetic sensory division
Answer:
i believe its c
Explanation:
A single sympathetic preganglionic fiber has many axon collaterals and may synapse with 20 or more postganglionic neurons.
The postganglionic axons typically terminate in several visceral effectors and therefore the effects of sympathetic stimulation are more widespread than the effects of parasympathetic stimulation.
explain movement of water in the root
Answer:
Water initially moves into the root hair cells by osmosis, because the mineral content of the cells is higher than that of the surrounding environment. Thus, a root pressure is established and extends into the microscopic tubes of the xylem.
Explanation:
Which type of neurons keep us informed about what is happening both inside and outside of our bodies?
Answer:
Sensory neurons keep us informed of is happening both inside and outside our bodies.
Explanation:
Brainly! For the first one to answer! Answer in one paragraph.
Do you solar cells, wind farms, tidal power, hydropower and thermal energy will solve our future energy needs?
Yes, according to my point of view I strongly believes that solar cells, wind farms, tidal power, hydropower and thermal energy will solve future energy needs.
Which source of energy is common now a days?The most common energy now a days is coal and by burning fossils fuels, we are risking climate change as well as limiting our resources. Supplies won’t last forever especially at the rate we are going. By using sun, wind, and water as sources of energy, we have renewable energy which would not run out anytime as soon as we required. Those energy charges are low cost and solves pollution issues too.
Heat energy has been transferred from one place to another by three main processes and in convection, heat energy has been carried by the movement of particles of matter. In conduction, heat is transferred by particles vibrating. In radiation, heat is carried directly by electromagnetic waves.
Therefore, Yes, according to my point of view I strongly believes that solar cells, wind farms, tidal power, hydropower and thermal energy will solve future energy needs.
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which type of transport requires energy to move a cell
help and not just guess i need someone who actually knowz
Answer:
no
Explanation:
though the waves of the graph are same but it is not constant because the waves goes down and up again. we know constant is what goes without falling down or climbing up.
please help me with this question:)
HELP! time crunch!
"Describe the flow of blood through the human heart starting in the left atrium and ending in the left atrium."
in two or three sentences please...Thanks in advance!
Willing to give 40 points!
Answer:
Explanation:
The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle through the mitral valve. The left ventricle pumps the oxygen-rich blood through the aortic valve out to the rest of the body. pl give brainly
Thigmitropism is a plant growth response to _ . A. water B. touch C. light D. humidity
How do plants contribute to the water cycle?
Answer:
Plants absorb water from the soil. The water moves from the roots through the stems to the leaves. Once water reaches the leaves, some of it evaporates from the leaves, adding to the amount of water vapor in the air. This process of evaporation through plant leaves is called transpiration.
I really hope this helps!
Plants contribute to the water cycle in several ways through Transpiration, evaporation, Precipitation: and infiltration.
How do we explain?Plants take in water through their roots and transport it up to their leaves. As water evaporates from the leaves, it creates a force that pulls more water up from the roots through a process called transpiration, and it is a major way that water moves through the atmosphere.
Water from plants and soil also evaporates into the atmosphere. This process is called evaporation, and it is another important way that water moves through the water cycle.
When water vapor in the atmosphere cools, it condenses and falls back to Earth as precipitation. This can be in the form of rain, snow, sleet, or hail.
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SOMEONE PLZ HELP ME!!!!!!!!!!!!!!!!!!!!!!
Explain in a few sentences how the carbon, nitrogen, and phosphorus overlap. How do these cycles cross paths through earths spheres?
Answer:
Explanation:Energy flow and nutrient circulation are the major functions of the ecosystem.
Energy is lost as heat forever in terms of the usefulness of the system. On the other hand, nutrients of food matter never get used up. They can be recycled again and again indefinitely.
Carbon, hydrogen, oxygen, nitrogen and phosphorus as elements and compounds makeup 97% of the mass of our bodies and are more than 95% of the mass of all living organisms.
In addition to these, about 15 to 25 other elements are needed in some form for the survival and good health of plants and animals.
These elements or mineral nutrients are always in circulation moving from non-living to living and then back to the non-living components of the ecosystem in a more or less circular fashion.
This circular fashion is known as biogeochemical cycling (bio for living; geo for atmosphere).
Among the most important nutrient cycles are the carbon nutrient cycle and the nitrogen nutrient cycle.
There are many other nutrient cycles that are important in ecology, including a large number of trace mineral nutrient cycles.
SOMEONE PLZ HELP ME, THIS IS DUE TODAY PLZ!!! I WILL MARK BRAINLIEST!!!!!!!!!
Answer: hi
Explanation:
List what you are thankful for! (It's Thanksgiving!!! Answer if you bake or if you like cakes pies cookies and treats!!! )
Answer:
I am thankful for my best friend I am thankful for my girlfriend and the person who said this:
HEY PLS DON'T JOIN THE ZOOM CALL OF A PERSON WHO'S ID IS 825 338 1513 (I'M NOT SAYING THE PASSWORD) HE IS A CHILD PREDATOR AND A PERV. HE HAS LOTS OF ACCOUNTS ON BRAINLY BUT HIS ZOOM NAME IS MYSTERIOUS MEN.. HE ASKS FOR GIRLS TO SHOW THEIR BODIES AND -------- PLEASE REPORT HIM IF YOU SEE A QUESTION LIKE THAT. WE NEED TO TAKE HIM DOWN!!! PLS COPY AND PASTE THIS TO OTHER COMMENT SECTIONS!!
Sort the bones based on whether they belong to the appendicular skeleton or the axial skeleton.
Answer:
The axial skeleton includes the bones that form the skull, laryngeal skeleton, vertebral column, and thoracic cage. The bones of the appendicular skeleton (the limbs and girdles) “append” to the axial skeleton.
The appendicular skeleton is the portion of the skeleton of vertebrates consisting of the bones that support the appendages. There are 126 bones. The appendicular skeleton includes the skeletal elements within the limbs, as well as supporting shoulder girdle pectoral and pelvic girdle.
Explanation:
hope this helps let me know if you need anymore help!!
We know gender differences are based in biology because all cultures practice the same gender norms and ideologies.
True
False
Answer:
false
Explanation:
not all cultures practice the same gender norms and ideologies
What type of cloud is Cloud A? What kind of weather might you expect when you see clouds of this type?
Answer:
Cloud A is a cumulus cloud. When these fluffy, white clouds are in the sky, you can expect fair weather.
Explanation:
in an experiment the group is exsposed to the varible to be tesetd is called the
Answer: Experimental Group
Explanation: This group is being scientifically tested on and is exposed to the variable. Compared to a Control Group which doesn’t get scientifically tested on and isn’t exposed to the variable.
Hope this helps you, sweetie!
What effect does high temperature have on radish germination?
Answer:
is concluded that while high temperature has an unfavourable effect on seed set of radish plants, it also weakens the incompatibility reaction between pollen and style, so that the result is a small increase in yield.
How does ground water relate to lakes or rivers?
All lakes and rivers are replenished by groundwater.
When ground water reaches the surface it can form lakes or rivers.
Groundwater can affect the size of lakes and rivers.
Lakes and rivers produce groundwater.
Answer:
When ground water reaches the surface it can form lakes or rivers.
Explanation:
Groundwater in valleys is often pushed under pressure by rainwater that falls on the nearby highlands. If the water table reaches the surface, a lake, a river, or a spring is formed. A spring in desert country is surrounded by plants that take advantage of the water supply, forming an oasis. Water now coming to the surface at oases in the Sahara Desert came from rain that fell on hills near the desert during the Middle Ages--eight hundred to one thousand years ago.
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What are internal structures?
Answer:
Internal structures are the inner pieces and parts that keep organisms alive, help them grow, and help them reproduce.
Explanation: