True , Helicase - breaks H-bonds between bases; binds at the replication fork
topoisomerase - breaks covalent bonds in DNA backbone; binds ahead of the replication fork
single-strand binding - prevents H-bonds between bases; binds after the replication fork
As DNA replication continues and the replication bubble expands, the parental double helix is unwound and separated into its two component strands. This unwinding and separating of the DNA requires three different types of proteins:
helicase - breaks H-bonds between bases; binds at the replication fork
topoisomerase - breaks covalent bonds in DNA backbone; binds ahead of the replication fork
single-strand binding - prevents H-bonds between bases; binds after the replication fork.
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Can someone please help grade 9 biology about photosynthesis
A plant cell's chloroplast is where photosynthesis takes place.The sun's light energy is converted throughout this procedure into chemical energy that is then stored in food.
For Grade 9, what is photosynthesis?"Green plants & a few other species prepare their food through a process called photosynthesis, which involves the utilization of water, carbon dioxide, and sunshine."Plants, algae, and some microorganisms employ the photosynthesis process to transform chemical energy into light energy.
Which four steps make up photosynthesis?The four stages of photosynthesis include light absorption, electron transfer, ATP production, and carbon fixation.The equation for the photosynthetic process is 6CO2 + 6H2O C6H12O6 + 6O2.
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Compare the amount of kinetic energy of particles in each state of matter.
Solids have the lowest kinetic energy so vibrate very little, Liquids have more kinetic energy so particles slide past each other while Gases have the most kinetic energy so fly around in the air.
What is matter?Matter is anything that takes up space and can be weighed. Matter has volume and mass.
Therefore matter is something that takes up space and has a mass. The three states of matter are solid, liquid and gaseous. Physical transition includes the conversion of a material from one state of matter to another without changing it's chemical composition.
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The table represents the transcription of a short peptide sequence in a human cell.
DNA: TTG CTG TGT GAG GCA GAA
RNA: AAC GAC ACA CUC CGU CUU
Protein (peptide sequence: ?
What is the expected gene product of the given nucleotide sequence when it is engineered in a bacterial plasmid?
1. Asn Asp Thr Leu Arg Leu
2. Leu Leu Cys Glu Ala Glu
3. Lys Gln Arg Asp Ala Glu
4. Phe Val Ser Leu Arg Leu
Answer:
1
Explanation:
use the chart with the condons being translated to amino acids
Figure 1 shows an image of a diseased plant. The fungus causes pollen to be replaced with powdery, dark colored spores. The fungus is spread by pollinators. What structure of the flower is most likely impacted by this fungus?
The anthers of the flower are most likely impacted by this fungus.
What is a fungus?
Fungus is a type of organism that is neither a plant nor an animal. It is a member of a group of organisms called eukaryotes, which includes all living things except bacteria and viruses. Fungi are made up of microscopic cells organized into long, branching structures called hyphae. Fungi are extremely diverse and can be found in all types of habitats, from soils and plants to animals, including humans. Fungi play important roles in the ecosystem, breaking down dead organic matter, cycling nutrients, and providing food for other organisms.
The anthers are the organs responsible for producing and releasing pollen, so if they are replaced with powdery, dark colored spores, the flower will be unable to produce viable pollen.
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Match the elements with its description
Potassium
Barium
Neon
Boron
Barium is a good heat and electrical conductor. Potassium is very reactive and malleable. possesses characteristics of both nonmetals and metals. Boron , Neon is a non-reactive gas.
Is malleable a good or bad thing?A person who is malleable is adaptable, inclined to accept other people's opinions, and lacks the self-assurance to stand up for his or her own beliefs. Being flexible is more a virtue than a flaw.
What is an illustration of flexibility?When a substance is hammered nor rolled under tension, it can form thin sheets, which is referred to as being malleable. Examples such malleable metals include lead, copper, silver, aluminum, gold, and iron.
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Spoilage of canned foods stored at high temperatures, accompanied by gas production, is
A) Thermophilic anaerobic spoilage.
B) Flat sour spoilage.
C) Spoilage by mesophilic bacteria.
D) Caused by acid-tolerant fungi.
E) Putrefactive anaerobic spoilage.
Spoilage of canned foods stored at high temperatures, accompanied by gas production, is Thermophilic anaerobic spoilage. Correct option (a)
What is thermophilic spoilage?
Thermophilic anaerobic spoiling is produced by anaerobic Thermoanaerobacter and Thermoanaerobacterium, which produce huge amounts of H2 and CO2 gases when fermenting medium-acid canned foods at high temperatures.
What causes canned food to spoil?Yet, certain bacteria that develop in canned goods do not create gas and so do not give an odd look of the can; however, they do cause spoiling of the product. Spoilage is typically caused by the development of germs as a result of leaking or underprocessing.
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LIMITED TIME, HELP!!!!!!!!!!!!!!!
The diagram ( image ) shows the changes in the shape of the beak in a species
of bird over a period of 300 years.
Which best explains the change shown?
Select one:
Mutations caused the birds to find new food.
Birds with long beaks had greater reproductive success.
Long-beaked birds catch more insects.
Short-beaked birds cannot find food.
Answer:
birds with long beaks had greater reproductive success
hope this was helpful
Answer:
Birds with long beaks had greater reproductive success
Explanation:
I got it right on my test.
Hi i would like some help assap
Answer:
the answer would be A, the nucleus!
Explanation:
the nucleus does the processing in a cell. the transcription process also occurs inside the nucleus.
im 99% pretty sure this correct, good luck! :0
Answer: ribosome
Explanation:
RIDOSOMES
Directions: Enter a '1' for true and a '2' for false.
Statement
Ribosomes are composed of rRNA and protein
Ribosomes are a membrane bound organelle only found in
eukaryotes
Ribosomes produce proteins
Ribosomes exist in the cytoplasm of all cells
Bound ribosomes produce proteins that will ultimately end up in
the cell membrane or be exported from the cell.
Answer:
2,2,1,1,1
Explanation:
Which Monomers combine to form portion of haemoglobin in red blood cells
The monomers that combine to form portion of haemoglobin in red blood cells are called the two alpha monomers and the two beta monomers.
What is haemoglobin?Haemoglobin is defined as the protein part of the red blood cells that helps in the transport of oxygen and removal of carbondioxide from the cells.
The major components of the haemoglobin include the following:
The protein component and The iron complex of a porphyrin derivative.The protein aspect.of the haemoglobin is then made up of the monomers that combine to form portion of haemoglobin in red blood cells are called the two alpha monomers and the two beta monomers.
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Which of the following is not one of the steps of the PCR cycle?
a. The sample is heated to 72 degrees Celsius and DNA polymerase synthesizes new copies of DNA.
b. The sample is heated to about 95 degrees Celsius to separate the strands, so they can be replicated.
c. The sample is cooled to about 10 degrees Celsius to deactivate the DNA polymerase until the next step is ready.
d. The sample is cooled to about 50 degrees Celsius and the primers can bind to the single DNA strands.
Option C is correct. Cooling the sample to about 10 degrees Celsius to deactivate the DNA polymerase is not one of the steps of a PCR cycle.
The Polymerase Chain Reaction (PCR) involves choosing a portion of the genome to be amplified utilizing short synthetic Fragments of DNA called primers, and amplifying that segment using several rounds of DNA synthesis.
There is three easy phases of every DNA synthesis reaction
(1) denaturing the template into single strands;
(2) annealing primers to each template DNA strand for new strand synthesis; and
(3) extending the new DNA strands from the primers.
In PCR, DNA is heated to a temperature of 94–98°C to denature it into single strands.
Then cooled to a temperature of 50–64°C to allow primer binding.
And finally raised to a temperature of 72–80°C to enable the polymerase to synthesis the complementary strand to produce double-stranded DNA.
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what are the parts labeled a-e? Figure 1. Electron micrograph of a young plant cell.
Mitochondria and the g plasma membrane are seen here.The response to the question is thus as follows.The cell wall, nucleus, vacuoles, mitochondria, endoplasmic reticulum, Golgi apparatus, and ribosomes are all clearly visible in this transmission electron micrograph.
What is meant by electron micrograph??Mitochondria and the g plasma membrane are seen here.The response to the question is thus as follows.The cell wall, nucleus, vacuoles, mitochondria, endoplasmic reticulum, Golgi apparatus, and ribosomes are all clearly visible in this transmission electron micrograph.Young plants' main cell walls are what they have.Cellulose makes it up.a picture made by irradiating a sample with an electron beam that is precisely focused (about 10 nm in diameter) and accelerating it in vacuum, then observing the transmitted, secondary, backscattered, and diffracted electrons as well as the distinctive X-rays that result.Especially for recording Trace evidence, micrographs are frequently employed in forensic science and engineering.To learn more about electron micrograph refer
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Why can't the CDC experiment with the virus and make a vaccine?
The CDC would not experiment with the virus and make a vaccine because of the risk of infection as well as mutation of the virus to a more deadly form.
What is a vaccine?A vaccine is a biological treatment that offers active acquired immunity against a specific infectious or cancerous disease. Numerous studies and analyses have been done to confirm the efficacy and safety of vaccines.
Vaccines can be made from weakened pathogenic organisms or parts of the pathogenic organism which are then introduced into the body to elicit an immune response.
However, some viruses are so contagious that it is risky to experiment with them in order to produce vaccines from the weakened organism or parts of the organism.
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5. A test was done to determine the biological father of a child. The child's blood
Type is A and the mother's is B. Baby Daddy #1 has a blood type of O, and Baby
Daddy #2 has blood type AB. Who is the true Baby Daddy? Explain how you
know
Start with what you know first:
child's genotype
Mother's genotype.
Daddy #1
Daddy #2_
remember that the child gets one gene from each parent
Based on the genotypes provided, it is not possible to determine who the true Baby Daddy is.
Who is the true Baby Daddy?This is because the child would need to have the same genotype as one of the two possible fathers in order for it to be determined that one of them is the true father. Since the child has a blood type of A, and neither Daddy #1 or Daddy #2 have the same type, it cannot be determined which one is the true father.The process of determining the biological father of a child is known as paternity testing. To determine paternity, the child's blood type (A) and the mother's (B) must be known. Baby Daddy #1 has a blood type of O, while Baby Daddy #2 has a blood type of AB. From this information, we can deduce that Baby Daddy #2 is the true biological father.The mother's genotype must include both an A and a B gene, since the child's blood type is A. Baby Daddy #1's genotype must contain two O genes, as his blood type is O. Baby Daddy #2 is the only possible father, since his genotype must contain one A gene and one B gene in order for the child to have a blood type of A. By testing the blood types of the mother, the potential fathers, and the child, we can determine the true biological father. This process is known as paternity testing, and it is useful for determining the legal father of a child, as well as for providing medical information to parents and their children.To learn more about paternity testing refer to:
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I'm having trouble wording how I would describe the molecular change in chocolate when melted. I'm asked to explain changes I would make to a model in order to correctly show what changed the chocolate molocules freedom of movement. can anyone help?
Answer:
When chocolate melts, the molecules in the chocolate gain more freedom of movement. To correctly show this change in a model, you can add a layer of movement to the molecules, such as showing them vibrating or rotating. You can also show the molecules breaking apart and reforming into different shapes, as they gain more freedom of movement.
Explanation:
Research a tundra plant or animal that is being affected by
climate change. What is the name of it? Where on Earth does it
live? How is its lifestyle being affected by climate change?
What is the outlook for this organism? Write your answer in
complete sentences below.
The tundra also takes a long time to recover from physical disruptions such as tyre tracks from big vehicles.
what is a climate change ?
Climate change, as it is often used, refers to global warming—the continual rise in global average temperature—and its consequences on the Earth's climate system. In a larger sense, climate change encompasses prior long-term changes to the Earth's climate. The current rise in global average temperature is faster than previous changes, and it is primarily the result of humans burning fossil fuels. The use of fossil fuels, deforestation, and some agricultural and industrial practises all contribute to the increase of greenhouse gases, particularly carbon dioxide and methane.
The tundra also takes a long time to recover from physical disruptions such as tyre tracks from big vehicles. Changes in the Climate A warming temperature might significantly alter tundra landscapes.
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B) A green pigment present in all plants that absorbs light to provide energy for photosynthesis
Answer: A green pigment present in all plants that absorbs light to provide energy for photosynthesis is chlorophyll.
Explanation:
Chlorophyll is a green pigment found in almost all parts of plants. it is essential in the process of photosynthesis. It absorbs light in the blue and red parts of the visible spectrum, but it reflects green light.
However, as this pigment cannot absorb the green color spectrum, it tends to impart the green color to the plant tissues. CChlorophyll is located in plant cells called chloroplasts. These are special cells that are located in the thylakoid membrane compartments.
Green plants are green because they contain a pigment called chlorophyll. It absorbs certain wavelengths of light within the visible light spectrum. Chlorophyll absorbs red and blue light. There are two chlorophylls in plants that are critical for absorbing light:
chlorophyll Achlorophyll BTo learn more about chlorophyll,
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what are the characteristics of living things and how are they used to identify new discoveries?
Answer: they can make their own food and fend for themselvse
Explanation:
n
Where can I find a website that will help me study diagrams of things like the cell cycle and cell organelle recognition?
Brainly.com is one of the sites that can help study diagrams of things like the cell cycle and cell organelle recognition.
What is cell cycle?The cell cycle, or also known as the cell-division cycle, is the series of events that take place in a cell that cause it to divide into two daughter cells.
Websites such as Wikipedia will also help you to facilitate your study of diagrams of things like the cell cycle and cell organelle recognition.
The cell cycle is a four-stage process in which the cell increases in size (gap 1, or G1, stage), copies its DNA (synthesis, or S, stage), prepares to divide (gap 2, or G2, stage), and divides (mitosis, or M, stage).
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2. Describe how the structures of the nervous system are organized in a hierarchy.
Answer:
Functionally, the nervous system is organised hierarchically; this is analogous to a business corporation with workers and managers. The hierarchy consists of effectors (sensory and motor) and different levels of information processing and integration in the spinal cord, brainstem and forebrain.
Explanation:
The structures of the nervous system are organized in a hierarchy: the brain, spinal cord, and peripheral nervous system, where the brain is at the top, regulating most all functions of the body.
What is the significance of the hierarchy in the nervous system?The hierarchy is important in all aspects, including the nervous system, as it allows a division of labor that increases the efficiency of doing the task and works together to coordinate the body, the highest level of the hierarchy is the brain, which regulates most of the functions. The spinal cord carries out the reflex actions, and they both regulate the body.
Hence, the structures of the nervous system are organized in a hierarchy: the brain, spinal cord, and peripheral nervous system, where the brain is at the top, regulating most all functions of the body.
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Arrange these images of the phases during the cardiac cycle in order starting with atrial contraction. Rank the phases of the cardiac cycle from first to last. Do not overlap any phases.
The activity of the human heart between the start of one heartbeat and the start of the next is known as the cardiac cycle. The phase from first to last (from left to right) are given in figure.
The process by which deoxygenated blood in the lungs is changed to oxygenated blood, and then the heart pumps that blood through the aorta to the rest of the body, is known as a cardiac cycle.
It consists of two phases: the diastole, which comes after the systole—a period of strong contraction and blood pumping—during which the heart muscle relaxes and replenishes.
The four phases of ventricular activity are rapid ventricular ejection, rapid ventricular filling, isovolumic contraction, and isovolumic relaxation.
The heart cycle has four main phacycleses: (1) "Isovolumic relaxation," (2) "Inflow," (3) "Isovolumic contraction," and (4) "Ejection."
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Which of the following phases of drug product development may be improved as a result of equipment, regulatory, supply, or market demands? Stage 1, stage 2, stage 3 or stage 4?
Answer:
stage 3
Explanation:
Equipment:
The set of articles or physical resources serving to equip a person or thing: such as. (1) : the implements used in an operation or activity : apparatus. sports equipment.
Types and Examples:
Types of equipmentMaterial.Agricultural equipment. List of agricultural equipment.Audio equipment.Camping equipment.Capital equipment.Cricket equipment.Diving equipment.Computers, trucks and manufacturing machinery are all examples of equipment. They are tangible because they have a physical form—unlike intangible assets (such as patents, trademarks or copyrights) that do not.Equipment is a general time with a broader definition compared to tools and equipment. It refers to a set of tools needed to perform a specific task. People often use the word equipment as the plural form of tool. In this case, a collection of tools will be called equipment
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What do gradualism and punctuated equilibrium have in common?
They are both explanations of the rate of evolutionary change.
They are both explanations that were put forth by Darwin.
They both discredit the theory of evolution.
They both utilize radioactive dating over relative dating.
Answer: a
Explanation:..
Gradualism and punctuated equilibrium have in common as they are both explanations of the rate of evolutionary change.
Option A is correct.
Gradualism and punctuated:The evolution of a species can take place in two different ways: punctuated equilibrium and gradualism.
Selection and variation that occurs more gradually is referred to as "gradualism." It's hard to notice in a short amount of time. For the following reasons, organisms are chosen for small variations that are slightly more suited to their environment: Those with more of the helpful quality live to see another day, while those with less of it pass away.
Change occurs in spurts in punctuated equilibrium. There is a time when very little changes, and then one or a few big changes happen, usually through genetic mutations in a few people. Random changes in DNA that are passed on to subsequent generations rather than being inherited are known as mutations.
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LIMITED TIME!!!! HELP PLEASE!!
The biological species concept emphasizes whether populations
Select one:
can mate with each other.
look the same
have similar ecological requirements.
share common ancestry.
The purpose of Carson's book was to:
O call attention to the issue of global climate change.
Owarn people about the dangers of certain pesticides.
Oraise awareness about the dangers of oil spills.
Oraise funds for wildlife preservation.
Rachel Carson's most well-known book, Silent Spring, was published in 1962. The book issued a caution against the use of pesticides created by humans, particularly DDT dichlorodiphenyltrichloroethane. During World War II, the insecticide DDT was produced in large quantities.
For what is Rachel Carson best known?The 1962 publication of Rachel Carson's book Silent Spring, a marine biologist turned nature writer, ignited the global environmental movement.
What was the subject of Rachel Carson's book?In her books on the sea, Carson discussed geologic findings made possible by submarine technology and breathing underwater, including how islands were founded, how currents alter and merge, how air temp affects sea creatures, and how erosion affects not only shorelines but salinity, fish farms, and tiny microbes.
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bacteria and viruses can only survive on a dry surface for about two hours true or false
Bacteria and viruses can only survive on a dry surface for about two hours is false.
The survival time of bacteria and viruses on a dry surface can vary widely depending on the type of microbe, the conditions of the surface, and the environment.
Some bacteria and viruses can survive for extended periods on dry surfaces, while others may die off quickly.
For example, non-enveloped viruses such as norovirus and adenovirus can survive for several days on dry surfaces, while enveloped viruses such as influenza and rhinovirus can survive for only a few hours on dry surfaces.
Bacteria such as Staphylococcus aureus can survive for several days on dry surfaces, while others such as Escherichia coli may only survive for a few hours.
It's important to note that some microorganisms are more resistant to survive in dry conditions than others, and the survival time can also vary based on the environmental conditions.
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it must be done as quickly as possible!!!, I give 20 points
Johann Friedrich Miescher, a Swiss chemist, made the initial discovery of the DNA molecule in the 1860s.
Who Discovered DNA?
As a crucial aspect of our body's immune system, white blood cells, Johann set out to investigate their essential components. These cells primarily came from bandages covered in pus that were gathered from a neighboring clinic.
This unknown chemical was given the name "nuclein" by Johann. Unbeknownst to him, Johann had found DNA, the fundamental building block of all life.
Johann conducted research utilizing salt solutions to learn more about the composition of white blood cells. When he introduced acid to a cell solution, he observed that something detached from the solution.
Therefore, Johann Friedrich Miescher, a Swiss chemist, made the initial discovery of the DNA molecule in the 1860s.
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Characteristics of a Myth
Add ONE example from the text in rip van winkle to support the myth characteristic
(must include page numbers)
Set in the past, often in
remote or exciting places
and times
Filled with characters who
are remarkable, strange,
and/or
exaggerated
Answer:
In Washington Irving's "Rip Van Winkle," the setting of the story takes place in the remote and picturesque Kaatskill Mountains, which serves as the perfect backdrop for the mythic and supernatural elements of the story. (page 2)
The main character, Rip Van Winkle, is a remarkable, strange and exaggerated figure; he is a lazy and careless man who spends his days avoiding work and spending time in the mountains. He is also blessed with the ability to sleep for 20 years, which is a exaggerated characteristic. (page 3)
Explanation:
Please help. I cant figure this out
Imagine that you need to make a solution of 3% nutrient agar. You need 100 mL of the solution. How much nutrient agar do you weigh out? Show/explain your answer.
You have to weigh 8.4 g of nutrient agar to make a solution of 3% nutrient agar in 100 ml solution.
How to calculate nutrient agar?Nutrient agar weighs 28 g of powder in 1000ml, so it will weigh 2.8 g in 100ml which is 1% of the solution, so 2.8 x 3 = 8.4 g of powder to weigh for making the solution, for sterilizing provide a temperature of 121°C for 15 minutes.
The nutrient agar is used to grow the bacterial population by providing the nutrient which is essential for the bacterial population to grow.
Therefore, weigh 8.4 g of nutrient agar to make a solution of 3% nutrient agar in 100 ml solution.
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Which of the following phrases best summarizes Chapter 13 bankruptcy? a. discharge debt and keep property b. discharge debt and liquidate assets c. reorganize debt and keep property d. reorganize debt and liquidate assets Please select the best answer from the choices provided. A B
reorganize debt and keep property.
What is Bankruptcy?bankruptcy is a legal process involving an individual or business that is unable to pay off its debts.
The chapter 13 of the Bankruptcy Code allows for the adjustment of debts for a person with regular income and permits the debtor to maintain their property while paying off their debts gradually over a period of time, often three to five years.
A petition is filed, either on behalf of the debtor, which is more often, or on behalf of creditors, which is less frequent, to start the bankruptcy process.
Therefore, reorganize debt and keep property.
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