Consider two kinesin motor proteins at the mitotic spindle midzone: kinesin A is a tetrameric motor that walks toward the plus end of both microtubules to which it is attached via its motor domains; kinesin B, on the other hand, walks toward the minus end of one microtubule while it is attached to another microtubule via its tail domain.How do these motors affect the length of the spindle?
A. They both work to shorten the spindle.
B. Kinesin-5 works to shorten the spindle whereas kinesin-14 works to lengthen it.
C. Kinesin-5 works to lengthen the spindle whereas kinesin-14 works to shorten it.
D. They both work to lengthen the spindle.
Answer:
C. Kinesin-5 (kinesin A) works to lengthen the spindle whereas kinesin-14 (kinesin B) works to shorten it.
Explanation:
Kinesins are microtubule-based motors localized in the mitotic spindle in order to ensure the correct segregation of the chromosomes during cellular division. These proteins are classified regarding their sequences at the core motor domains which determine their motility. Kinesins can move along microtubules in opposite directions, walking toward the plus end (i.e., the end that grows more rapidly) or moving toward the minus end. Recently, it has been shown that opposite forces between kinesin-5 (plus-end-directed) and kinesin-14 (minus-end-directed) microtubule-based motors regulate the length of the spindle during cellular division. Kinesin-14 is a minus-end-directed motor protein that walks along microtubules from plus- to minus-end, while kinesin-5 is a plus-end-directed motor protein that walks along microtubules from minus- to plus-end, and thereby they work to shorten and lengthen the mitotic spindle, respectively.
PLEASE HELP !! ILL GIVE BRAINLIEST *EXTRA 40 POINTS* DONT SKIP :(( .!
Answer:
it's a because
When we burn oil, coal, and gas, we change the ocean's basic chemistry, making it more acidic. Our seas absorb as much as a quarter of all man-made carbon emissions. Since the start of the Industrial Revolution (and our coal-burning ways), the ocean has become 30 percent more
Answer:
A - Burning coal
Explanation: When you burn coal you create polution which contributes to global warming, and global warming warms up the earth.
what is a good blood pressure?
Answer: A normal blood pressure level is less then 120/80mmHg
Explanation:
When new dirt is created from organic and inorganic materials, it is called
O A) erosion
B) weather
C) composting
OD) conservation
Answer:
the answer is C) composition
PLEASE HELP TAKING TEST NOW!!!!!!!!!!!!!! What is the main factor causing the salinity of the Everglades to change? (1 point)
O snake populations
O flood control levees
O climate change
O transportation canals
Answer: snake populations
Explanation:
Osmotic pressure is: the pressure required to stop the flow of solvent from a region of high solute concentration to a region of low solute concentration. the pressure required to stop the rupture of the semipermeable membrane. the pressure required to reverse the flow of solvent through a semipermeable membrane during osmosis. the pressure required to stop the flow of solvent from a region of low solute concentration through a semipermeable membrane into a region of high solute concentration. None of these
Answer:
the pressure required to stop the flow of solvent from a region of low solute concentration through a semipermeable membrane into a region of high solute concentration.
Explanation:
Osmosis is the movement of water (solvent molecule) from a region of low solute concentration to a region of high solute concentration via a semipermeable membrane.
Osmotic pressure is the pressure (force) applied to a given solvent in order to prevent it's movement via osmosis across a semipermeable membrane. Since, osmotic pressure is the pressure required to stop osmotic process, then it can be further defined as follows:
Osmotic pressure is the pressure required to stop the flow of solvent from a region of low solute concentration through a semipermeable membrane into a region of high solute concentration.
You can find the correct mass of a solid by using ________
Answer:
weights
Explanation:
Mitosis is the division of the _____ and begins with a stage called ____ . As the nuclear envelope finishes dissolving, the cells enter ____, where microtubules from the spindle attach to the duplicated X-shaped chromosomes.
When all chromosomes are fully attached to the spindle, they align at the midplate between poles. This marks the middle of mitosis, which is ____ . As sister chromatids separate, cells enter ____ and they finish separating and a nucleus reforms around each set of new chromosomes in ____ . During this phase, cytokinesis also becomes visible as the cells themselves begin to divide.
Answer:
cell; prophase. prometaphasemetaphase. anaphase, telophase.Explanation:
Mitosis is the division of the cell and begins with a stage called prophase. As the nuclear envelope finishes dissolving, the cells enter prometaphase, where microtubules from the spindle attach to the duplicated X-shaped chromosomes.
When all chromosomes are fully attached to the spindle, they align at the midplate between poles. This marks the middle of mitosis, which is metaphase. As sister chromatids separate, cells enter anaphase and they finish separating, and a nucleus reforms around each set of new chromosomes in telophase. During this phase, cytokinesis also becomes visible as the cells themselves begin to divide.
Which factor listed below is abiotic? Bacteria, water, fungi, protists
Answer:water
Explanation:
Answer:
Water
Explanation:
Water does not contain cells, therefore it is non-living.
how many total autosomes do human cells have
Answer:
22
Explanation:
....hope it helps.......
Answer:
Humans have 22 pairs of autosomes ..
Explanation:
Organisms that live in simular environments, such as the ocean, often have the same adaptations. This is due to what
Complete the following sentences that describe glycolysis and gluconeogenesis in both fed and resting states. After a meal the body is in a fed state, which stimulates the pancreas to secrete the hormone insulin . The plasma membrane receptor on the liver binds to this hormone and activates a signaling pathway that results in the dephosphorylation of the bifunctional enzyme. This event causes a(n) increase in the concentration level of the fructose-2,6-bisphosphate (F-2,6-BP). This new concentration of F-2,6-BP activates the glycolysis pathway. In a fasting state, the pancreas secretes the hormone glucagon . The plasma membrane receptor on the liver binds to this hormone and activates a signaling pathway that results in the phosphorylation of the bifunctional enzyme. This event causes a(n) decrease in the concentration level of F-2,6-BP. This new concentration level of F-2,6-BP. activates the gluconeogenesis pathway, by allowing inhibition of the reciprocal reaction.
Answer:
Fed state - Insulin; dephosphorylation; increase; glycolysis
Fasting state - Glucagon; phosphorylation; decrease; gluconeogenesis
Explanation:
Fructose-2,6-bisphosphate is an allosteric regulator of the enzymes phosphofructokinase-1 and fructose1,6-bisphosphatase-1 which are involved in glycolysis and gluconeogenesis respectively.
After a meal the body is in a fed state, which stimulates the pancreas to secrete the hormone insulin . The plasma membrane receptor on the liver binds to this hormone and activates a signaling pathway that results in the dephosphorylation of the bifunctional enzyme, phosphofructokinase-2/fructose-2,6-bisphosphatase. This event causes a(n) increase in the concentration level of the fructose-2,6-bisphosphate (F-2,6-BP). This new concentration of F-2,6-BP activates the glycolysis pathway.
In a fasting state, the pancreas secretes the hormone glucagon . The plasma membrane receptor on the liver binds to this hormone and activates a signaling pathway that results in the phosphorylation of the bifunctional enzyme phosphofructokinase-2/fructose-2,6-bisphosphatase. This event causes a(n) decrease in the concentration level of F-2,6-BP. This new concentration level of F-2,6-BP. activates the gluconeogenesis pathway, by allowing inhibition of the reciprocal reaction.
if a light bulb is off; how can you tell that It has been used recently? ANSWER ASAP
If you have a second fixture around, you can use the same test of putting a tube in a working socket and see if it lights. It is not uncommon in fluorescent fixtures to have the ballast burn out. You may detect a burnt smell or see the bulbs flickering.
PLSZ HELP ME EITB THIS
Answer:
I don't understand the question you sent me
What pigment replaces chlorophyll in
the fall season?
A. carotene
B. betatene
C. hypotene
Answer:
A. Carotene
Explanation:
It is an orange/red pigment which is seen during the fall.
What is chrosome ? (Definition in own words )
Answer:
A structure found inside the nucleus of a cell. A chromosome is made up of proteins and DNA
Explanation:
:)
Answer:
a chromosome is a long DNA molecule with part or all of the genetic material of an organism. most eukaryotic chromosomes include packaging proteins called histones which aided by chaperone proteins bind to and condense the DNA molecule to maintain its integrity.
4.5.1 Practice: Evolution and Classification
Answer:
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Explanation:
Answer:
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protest bushes,palm trees and maize plants are all flowering plants ?
Answer:
The great centres of palm distribution are in America and in Asia from India to Japan and south to Australia and the islands of the Pacific and Indian oceans, with Africa and Madagascar as a third but much less important palm region.
Which behavior shows a way that animals defend their territory
Answer: Territorial behaviour, in zoology, the methods by which an animal, or group of animals, protects its territory from incursions by others of its species. Territorial boundaries may be marked by sounds such as bird song, or scents such as pheromones secreted by the skin glands of many mammals.
Explanation:
Answer:
Wolves work together to chase or kill any wolves that are not in
their group
Explanation:
Many animals rely on smells to mark their territories, spraying urine, leaving droppings or, rubbing scent glands around the territories' borders. Approaching animals will be warned off the territory without ever encountering the territory's defender.
importance of transpirtation
Answer:
transportation is important for whole world because it is a part of water cycle
Please give a good description of genetic mutations. Thanks!
Answer: A mutation is a change in a DNA sequence? Mutations can result from DNA copying mistakes made during cell division, exposure to ionizing radiation, exposure to chemicals called mutagens, or infection by viruses.
Explanation:
The most common genetic mutation is, In fact, the G-T mutation.
in olden days,parents were regaeded as educators,and educators as parents.
Answer: That answer is completely FALSE
Explanation:
When does a cell have chromosomes in the dyad form?
G1 stage of interphase
telophase of mitosis
after meiosis 1
after meiosis II
In animals, glucose is absorbed from the gut into intestinal cells against its concentration of gradient. This one-way process requires energy to work. Which of the following best describes how glucose is absorbed into intestinal cells?
A. By osmosis
B. By diffusion
C. By a buffer
D. By active transport
Answer: Glucose is absorbed through the intestine by a transepithelial transport system initiated at the apical membrane by the cotransporter
Explanation:
if im wrong ill give you your points
Osmosis best describes how glucose is absorbed into intestinal cells.
What do you mean by osmosis?
Osmosis is the movement of water molecules from a solution with a high concentration of water molecules to a solution with a lower concentration of water molecules, through a cell's partially permeable membrane.
Osmosis is when water moves from an area of LOW solute concentration (low osmolarity) to an area of HIGH solute concentration (high osmolarity) through a semipermeable membrane. Osmosis is one of the most important ways that plants and animals achieve homeostasis.
The absorption of water from the soil is due to osmosis. The plant roots have a higher concentration than the soil. Therefore, the water flows into the roots. The guard cells of the plants are also affected by osmosis.
Learn more about osmosis:
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A plant species live in an area with limited sun.Which physiology adaptation would be most useful to the plant?
Answer:
The correct answer is - large leaves.
Explanation:
Chlorophyll is the green pigment present in the chloroplast found in the plant cells that is used to make food or glucose from sunlight. These pigments are present in a high amount on the leaves of the plant.
If a plant lives in an area with limited sun then there will be a limited amount of sunlight for that plants adapt accordingly and big leaves are one of them. Big leaves have more chlorophyll and the more the pigment higher the amount of energy is trapped by the plant for food production.
In system 1, glucose will move ___________ Sac 1 because of ___________.
a. out of; diffusion
b. in to; diffusion
c. out of; osmosis
d. in to; osmosis
Explanation:
The answer is c in my understanding
Which of the following is a critical factor driving evolution?
Environmental conditions
Health in comparison to similar organisms
Ability to acquire food
Strength in comparison to similar organisms
All of these are equally important
all of these are equally important, what if there is an option for natural selection, natural selection would be the most important but for this it's all these are equally important.
The critical factor driving evolution is strength in comparison to similar organisms.
According to Charles Darwin, Organisms that are better able to survive in their environment live long enough to reproduce and pass on these favorable traits to their offspring leading to the perpetuation of these organisms and gradual demise of other individuals of the same species who lack these favorable traits.
This is the origin of the cliché, "survival of the fittest". Hence organisms that lack certain strengths possessed by other organisms are gradually replaced by other individuals having such strengths.
Learn more: https://brainly.com/question/6111443
Height in humans is an example of
Answer:
Polygenic inheritance
Explanation:
Polygenic inheritance refers to inheritance of a phenotypic characteristics (trait) that is attributable to two or more genes and can be measured quantitatively.
Why might more frequent prescribed burns be easier to control than less frequent burns?
Answer:
Wildfires that burn into areas where fuels have been reduced by prescribed burning cause less damage and are much easier to control. ... The time interval between fires can be as often as every year although a 3- or 4-year cycle is usually adequate after the initial fuel-reduction burn.
Explanation:
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Which of the following statements is true according to the food web shown above?
A.
Energy flows from producers and consumers to decomposers.
B.
Energy flows from producers, consumers, and decomposers to the Sun.
C.
Energy flows from consumers to decomposers and from decomposers to consumers.
D.
Energy flows directly from the Sun to consumers.
Answer:
A.
Energy flows from producers and consumers to decomposers.
Explanation:
Answer:
A. Energy flows from producers and consumers to decomposers
All energy starts from the producers, then it continues of to the consumers which then creates waste to soon enough become the property of decomposers.
Hope this helps!