Storing DNA in the form of linear chromosomes creates problems for replication of dna at the ends of the chromosomes because DNA polymerase can only synthesize DNA in the 5' to 3' direction and it's difficult to reach the ends of the linear strands.
The replication mechanism for DNA has a physical size. As a result, towards the ending of a linear chromosome's DNA chain, there simply isn't enough physical room for the replication complex to remain connected to the remaining DNA and finish the replication of the last few base pairs.
It is challenging to replicate linear DNA molecules because it is difficult for the enzymes involved in replication to reach the very end of the linear strands. As a result, a small number of nucleotides are lost from the ends of each chromosome with each replication, leading to a gradual shortening of the chromosomes over time. Eukaryotic cells overcome this difficulty with an enzyme called telomerase, which establishes repeating DNA sequences called telomeres at the ends of chromosomes.
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You are doing a study on the enzymatic effects of lysosomes and want to follow the whole process from the formation of the enzymes to their use in the lysosome. In what location of the cell would you begin this observation?.
Answer: You are doing a study on the enzymatic effects of lysosomes and want to follow the whole process from the formation of the enzymes to their use in the lysosome. In what location of the cell would you begin this observation? Endoplasmic reticulum.
The universe is around 13. 5 billion years old, and homo sapiens could have been argued to have emerged in the last 200,000 years. If you scaled the life of the universe to one day long, starting at midnight and ending at midnight, at what time would homo sapiens emerge?.
Following this analogy, homo sapiens would appear at 23:59:58:72.
13.5 billion years is equal to [tex]13.5 x 10^{9}[/tex] years.
200,000 years is equal to [tex]2 x 10^{5}[/tex] years.
We can do a proportion:
[tex]13.5x10^{9} : 24 h = 2x10^{5} : X\\ X=24 h * 2x10^{5}/13.5x10^{9} = 3.56 x 10^{-4}h\\[/tex]
Because 1 hour has 3600 seconds, we can make the following proportion:
[tex]1 hour : 3600 s = 3.56x10^{-4}h : X\\X = 3.56x10^{-4}h * 3600 s / 1 h = 1.28 s[/tex]
This means that, if 13.5 billion years lasted 24 hours, 200,000 years would last 1.28 seconds. This does seem like a very small number for an immense period of time like 200,000 years, but it does put into perspective all the time that has passed since the creation of the universe.
So, homo sapiens would emerge 1.28 seconds before midnight or at
23:59:58:72.
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WILL GIVE BRAINLIEST
Which of the following correctly compares the changes that take place in an ecosystem during primary succession and secondary succession?
Primary succession takes place over a long period of time on newly formed land, while secondary succession quickly occurs in areas that has been disrupted by a natural disaster.
Primary succession takes place quickly on newly formed land, while secondary succession occurs over a long period of time in an area that has been disrupted by a natural disaster.
Primary succession takes place over a long period of time in an area that has been disrupted by a natural disaster, while secondary succession quickly occurs on newly formed land.
Primary succession takes place quickly in an area that has been disrupted by a natural disaster, while secondary succession occurs over a long period of time on newly formed land.
Answer:
Primary succession takes place over a long period of time on newly formed land, while secondary succession occurs quickly in areas that have disrupted by a natural disaster
Explanation:
what is the genue name for cocoa
Answer:
Theobroma
Hope this helps :)
Explication: Had to do a project about it
When a scientist makes a discovery, it must be peer-reviewed (read and edited by a group of scientists that he does not know or do not know one another) before the finding can be published in a journal. which reason would not prevent the finding from being published?
Answer: if its multiple choice its d
Explanation:
A__________ is a list of chronological steps that an experimenter must follow when
conducting an experiment.
Otrial
O "to do" list
procedure
conclusion
Please help asap NO LINKS PLS
What is the suggested first order of cells out of
anaerobic prokaryotes, multicellular eukaryotes,
photosynthetic prokaryotes, unicellular
eukaryotes?
Answer:
Anaerobic prokaryotes.
Explanation:
Hope this helps!
the deliberate manipulation of organisms by transferring genetic material from one organism to another, a type of genetic engineering, is known asdna technology.
Gene therapy, the deliberate manipulation of organisms by transferring genetic material from one organism to another, a type of genetic engineering, is known asdna technology.
Gene remedy is a way that modifies a person's genes to deal with or remedy disease. Gene healing procedures can paintings via way of means of numerous mechanisms: Replacing a disease-inflicting gene with a wholesome reproduction of the gene. Inactivating a disease-inflicting gene that isn't functioning properlyGenetic engineering, additionally referred to as genetic change or genetic manipulation, is the change and manipulation of an organism's genes the usage of technology.
The method of manipulating the genetic cloth of organisms, additionally referred to as biotechnology.The advent of recent DNA into an present organism's cell, typically via way of means of vectors which includes plasmids and changed viruses.Genetic engineering is described because the direct manipulation of an organism's genes which include heritable and nonheritable recombinant DNA constructs.
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Which of the following is NOT true about cytokinesis?
A. Begins in anaphase and continues on through telophase
B. Nuclei have taken on the appearance of interphase nuclei
C. Is the process whereby the cytoplasm of a single cell is divided to
spawn two daughter cells
D. Is first seen when the cell begins to pucker in, a process called
furrowing
Answer: A
Explanation:
I hope this helps!
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Thank you.
Scientists use science to____________________the world.
Answer:
Scientists use science to___Study_________________the world.
Explanation:
Hope this helps :)
Jess measured the door with the meter stick. Upon measuring, he found that the door to the classroom was 1.25 meters long. How many decimeters (dm) would this be?
Answer:
12.5 decimeters
Explanation:
Suppose actively dividing eukaryotic cells were treated with a chemical that blocks the activity of the enzyme telomerase. What would happen to these cells?.
Cells would lose DNA at the ends of the chromosomes over many generations if treated with a chemical that blocks the activity of telomerase.
Telomerases are enzymes that add nucleotides to the ends of chromosomes since DNA polymerase III is unable to do so. It inserts TTAGGG sequences to the chromosomal ends roughly 1000 times. The inclusion of TTAGG sequences lengthens the original chromosome. Actively dividing eukaryotic cells treated with a telomerase inhibitor would be unable to duplicate the DNA at the tail end of their linear chromosomes.
As a result, the chromosomal ends are shortened. As cells divide, their chromosomes get shorter. Repeated sequences are added to the ends of the chromosomes, and the shortening process only shortens these sequences, leaving the major chromosomes containing genetic information intact. Telomeres therefore aid in the preservation of genetic information between generations.
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5. It takes 3 hours to cook an 8-pound turkey.
How long would it take to cook a turkey that is
14 pounds?
6.
The unitary method is a technique for problem-solving that involves first determining the value of a single unit, then multiplying that value to determine the required value.
It takes 3 hours to cook an 8-pound turkey. How long would it take to cook a turkey that is 14 pounds?
A problem can be solved using the unitary method by first determining the value of a single unit, and then multiplying that value to determine the required value. Essentially, the purpose of this procedure is to calculate the value of a unit from the value of a multiple.
It can be solved using simple unitary method.
Time taken by 8 pound turkey to get cooked = 3 hours
Therefore, time taken by 1 pound turkey to get cooked = (3/8) hours
Hence, time taken by 14 pound turkey to get cooked = (3/8*14) hours
= 5 hours 25 mins.
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What type of transport requires energy to carry a nutrient from outside the cell, through the cell membrane, and into the cell?.
The amino acids which can provide positive charge will be Arginine or lysine .
What do a polypeptide's N-terminus and C-terminus look like?
The "N-terminus," also known as the "amino terminus," and the "C-terminus," also known as the "carboxyl terminus," are the free amine and carboxylic acid ends of the chain, respectively. These two protein termini differ chemically from one another, hence it follows that they will naturally have various chemical properties.
Arginine is an amino acids that helps in body build protein . In packaging of DNA arginine and lysine are used because they carry positive charge.
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Active transport requires energy to carry a nutrient from outside the cell, through the cell membrane, and into the cell.
What is active transport?Active Transport is defined as a process involving the movement of molecules against a gradient or an obstruction from a location of lower concentration to a region of greater concentration with the use of external energy.
During active transport, a protein pump uses ATP, which is a sort of stored energy, to move molecules.
Some examples of active transport include the uptake of glucose by the human intestine and the uptake of minerals or ions by plant root hair cells.
Primary active transport and secondary active transport are the two categories of active transportation.
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The task of moving our bodies from one place to another belongs to our_______.
Answer:
the Locomotor system
Explanation:
the locomotion system is also known as the musculoskeletal system. it is made up of the skeleton, skeletal muscles, ligaments, tendons, joints, cartilage.
Model 2 foot width in a high school classroom determine the mean for each data group, and describe in a complete sentence how you calculated them
Answer:
Good Luck... I have no idea
When Kevin was younger, he was amazed by dinosaurs and was always very fascinated by their extinction. He wants to study animals and ensure they do not become extinct in the future. Which career in biology would be best for Kevin? Why?
The career in biology that would be best for Kevin is to become a paleontologist.
What do you mean by Animal extinction?Animal extinction may be defined as the complete process of termination or elimination of a particular organism's species through the impacts of numerous consequences.
The branch of biology that significantly deals with the detailed study of prehistoric species is known as paleontology. This branch of biology determines the characteristics of past living organisms on the basis of their fossils.
Therefore, the career in biology that would be best for Kevin is to become a paleontologist.
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All of the following are examples of passive transport except:____.
a. filtration.
b. osmosis.
c. endocytosis.
d. dialysis.
All of the given options are examples of passive transport except (c) endocytosis.
Passive transport refers to the movement of substances along a concentration gradient, i.e. from a higher concentration to lower concentration. No external energy is required in passive transport since the substances are moving down the concentration gradient.
On the other hand, endocytosis is an example of active transport. Active transport refers to the movement of substances against a concentration gradient, i.e. from a lower concentration to a higher concentration. Since it involves the movement of substances against the gradient, therefore, energy is needed to carry out this process.
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17. What product do all three reactions in Model 2 have in common?
In all the reactions, reactants release water as a by-product. Thus, this is a type of condensation reaction which is common in Model 2.
What is a condensation reaction?A chemical reaction in which two small molecules combine with each other to form a larger molecule is defined as a condensation reaction. Water is released as a by-product in this type of reaction.
Formation of sucrose, a disaccharide by combining two monosaccharides (Glucose + fructose) is an example of condensation reaction. Similarly, two amino acids are joined together to form a dipeptide through the elimination of water molecule.
Thus, condensation reactions are important in biochemistry for the formation of macromolecules.
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Answer:
Reactants release water as a by-product
Explanation:
The human population has changed in ways that are similar to other populations. How has the human population changed since it first appeared on earth?.
Answer:
b. the population is generally increase, and at rates that have varied over time
Explanation:
The change in internal energy for a given system is –325 j. The system loses 155 j of energy as heat at the same time that it expands from an initial volume of 15. 0 l at 1. 00 atm of pressure. What is the final volume of the system in liters? enter your response without units to the nearest 0. 1 l.
(B) 16.7 L is the final volume of the system in liters when the change in internal energy for a given system is –325 j and he system loses 155 j of energy as heat at the same time that it expands from an initial volume of 15. 0 l at 1. 00 atm of pressure.
In thermodynamics, internal energy is a characteristic or state function that characterizes a substance's energy in the absence of capillary effects and the impacts of external magnetic, electric, and other fields.
The value of the energy is dependent on the substance's state, not the type of procedures used to get there, just as with any other state function. The work is equal to the change in internal energy when a system changes state as a result of a process in which only work is involved, according to the first law of thermodynamics.
The solution for the final volume of the system in liters when the change in internal energy for a given system is –325 j and he system loses 155 j of energy as heat at the same time that it expands from an initial volume of 15. 0 l at 1. 00 atm of pressure is attached which is 16.7 L.
We first must get the final volume (v2) after we plugged the equation (i) on the enthalpy. After getting the final volume, we will then convert the units to liter using the conversion factor of 1 L.atm = 101,325 J.
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Question correction:
The change in internal energy for a given system is -325 J. The same system loses 155 J of energy as heat at the same time that it expands from an initial volume of 15.0 L at 1.00 atm of pressure. What is the final volume of the system?
A) 13.3 L
B) 16.7 L
C) 32.0 L
D) 170. L
E) 185 L
the blood flow of healthy individuals is laminar but becomes turbulent during certain vascular diseases. endothelial cells (ecs), which line the lumen of blood vessels, are in direct contact with blood. you hypothesize that different types of blood flow (i.e. laminar vs. turbulent) may cause endothelial cell dysfunction which in turn contributes to the progression of diseases. to test this hypothesis, you fabricated a microfluidic device in which ecs were seeded inside a rectanugular channel of prescribed width
Blood flows in orderly, parallel layers through the arteries in laminar flow when there are no impediments to disturb the layers. A healthy artery, like the femoral artery, exhibits laminar flow.
When the flow channel becomes disordered, layers fail to form, and eddy currents develop, the scenario is referred to as turbulent flow.
The current vascular hemodynamics paradigm views typical blood flow as pulsatile laminar flow. Diseases like atherosclerosis and brain aneurysms can be brought on by the transition to turbulence. But recently, we showed that turbulence can exist in both the aneurysm sac and the main artery of experimental models of brain aneurysms.
The necessity for even mixing of blood corpuscles as they travel along the arteries drives the turbulence of blood flow, which originates in the cardial cavities. We think that the energy expended might be sufficient to overcome a resistance in the main arteries, where the wall lacks active contraction components.
Small arterial micro vessels (Metereriolar-like type) have a similar inner wall relief that must be extruded into the lumen of the nuclear zone of the endothelial cell. However, blood movement within arterial micro vessels is highly dependent on the myogenic wave activity of intramural smooth muscle cells.
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Assume that a g1 somatic leaf cell nucleus in sunflower contains 16 picograms of dna. how much dna would be expected in a metaphase i cell of a flower?
A flower's metaphase I cell should have 32 picograms of DNA, based on the assertion made.
What is the metaphase?A phase of cell division known as "metaphase" (mitosis or meiosis). Individual chromosomes are typically dispersed throughout the cell nucleus. The chromosomes of the cell condense and move toward one another, aligning in the center of the dividing cell, and the nucleus of the cell disintegrates during metaphase.
What occurs first during the metaphase?Meiosis I's initial metaphase entails the alignment of paired chromosomes along the cell's middle (metaphase plate), guaranteeing that the two daughter cells that follow from meiosis I have two full copies of each chromosome.
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A herd of deer lives in a forest where they eat the leaves of trees. The number of energy storage molecules in the trees and in the deer has increased. What has happened to the amount of carbon in the trees and in the deer?
The amount of carbon in the trees and in the deer . . .
a
has increased.
has increased.
b
has decreased.
has decreased.
c
has not changed.
has not changed.
d
is not related to the number of energy storage molecules.
Which area should have the lowest temperatures?
Α 1
B. 2
C. 3
D. 4
Answer: A 1
Explanation: A 1 has th highest altitude. Hope this helps!
The synthesis of sugar molecules through the process of photosynthesis requires energy absorbed from sunlight. Bearing this in mind, what kind of reaction is photosynthesis?.
Answer:
endothermic reaction
Explanation:
This means it cannot occur without energy (from the Sun).
: minimally-invasive midline posterior interbody fusion with cortical bone trajectory screws compares favorably to traditional open transforaminal interbody fusion
In comparison to the conventional open TLIF procedure, midLIF required less time to perform and resulted in less blood loss.
What is MidLIF?
For the treatment of degenerative disorders, lumbar spinal fusion can be achieved using a variety of surgical procedures. Although midline lumbar interbody fusion (MIDLIF) provides a legitimate substitute for the more conventional pedicle screw trajectory, transforaminal lumbar interbody fusion (TLIF) is the most widely used method. This study's objective is to assess the clinical results from a cohort of patients who underwent MIDLIF in a single facility during the first training phase of the surgical team.
In comparison to the conventional open TLIF procedure, midLIF required less time to perform and resulted in less blood loss. These variations compare favorably to reported tubular minimally invasive TLIF values in the literature. In comparison to typical open TLIF, patient reported results from 6 weeks to 24 months after surgery, hospital length of stay, and reoperation/readmission rates all preferred MidLIF.
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Which of the following statements best
describe what happens to the energy
released during cellular respiration in a
mouse?
Choose 2 answers:
A Some energy is transferred to the mouse's
muscles to power movement.
B Some energy is destroyed when it's lost as
heat to the environment.
C Some energy is used to help regulate the
mouse's internal temperature.
Answer:
a and c is the correct answer
Answer: Some energy is transferred to the mouse's
muscles to power movement (A)
Some energy is used to help regulate the
mouse's internal temperature. ()
Explanation:
Many bacteria and fungi have a difficult time surviving on our food if the food is very salty. The best explanation for this is.
Many bacteria and fungi have a difficult time surviving on our food if the food is very salty. This happens because the food acts as a hypertonic solution for the bacteria and fungi.
Bacteria are the microorganism that are prokaryotic in nature. These are unicellular organisms present everywhere in an environment. These can be of varying shapes and sizes like coccus, spirillum, vibrio, etc. Bacteria can be both harmful as well as useful for the organisms and environment.
Hypertonic solution is the one in which when any cell is placed, it loses its water. The solution contains more solute particles than the cell placed in it. As a result of osmosis, water moves out of the cell. The same phenomenon happens with bacteria in salty foods, it loses its water and becomes dehydrated.
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Kevin has learned about planarians, which are a species of flatworm. Some of these worms have two methods of reproduction. A planarian can produce new offspring by splitting itself and growing new body parts on each portion. Or it can mate with another planarian to produce offspring. Kevin believes that both methods of reproduction will produce offspring that are genetically identical to the parent. Do you agree? Explain your answer.
Answer:
No
Explanation:
Planarians reproduce asexually and sexually. In asexual reproduction, the offspring is made from only the genes of the mother planarian. Planarians splitting is an example of budding. Budding is asexual, and asexual reproduction creates a clone of the mom. Sexual reproduction uses both the genes of the father and mother, so the offspring is a mix of both the parent's genes. That means that the offspring is not a clone of either one of the parents.