The mpf protein complex turns itself off by _____.
Final answer:
The MPF protein complex turns itself off by the targeted degradation of its cyclin subunit towards the end of mitosis, allowing the cell to progress to the next stage of the cell cycle.
Explanation:
The MPF protein complex turns itself off by initiating the degradation of its cyclin subunit. MPF, also known as Mitosis Promoting Factor, is composed of two subunits: cyclin and cyclin-dependent kinase (cdk). While levels of cdk remain relatively constant, the levels of cyclin vary, accumulating during the G₁ phase and peaking at mitosis before they are targeted for degradation. This degradation process involves proteasomes that break down cyclin, leading to the inactivation of MPF towards the end of mitosis. The breaking down of cyclin is a critical step in ensuring that MPF activity ceases, allowing the cell to exit mitosis and enter the G₁ phase of the cell cycle.
When animal cells undergo cell division, several cellular structures aid the the movement of chromosomes into the two new daughter cells. What are these cellular structures? A) DNA and the resulting transcribed RNA. B) Nuceolus and the proteins it produces. C) Centrioles and the spindle fibers they produce. D) Smooth ER and the proteins produced and packaged there.
Growth on the macconkey agar and na plates was recorded as good growth poor growth. what did you use to establish what constituted good growth?
Microbiological experiments are conducted to analyse the growth pattern and capabilities to consume a substrate and undergo multiplcation in number and mass for multiple microbes. Generally, agar or brotg remains the preliminary substrates for analysis of microbial growth. The usual practices include dilution of the stock solution, plating on the plate and observations after a growth period of atleast 24 hours. The number of colonies appearing on the plate are observed and counted manually or automatically. Using appropriate mathematical formula, the actual number of microbial units can be calculated in thw stock solution.
Thus, based upon number of colonies appearing on the plate, the growth can be distinguished as following:
1. No growth: this refers to no appearance of any growth on plate, neither diluted nor stock solution.
2. Poor growth: Qualitatively, poor growth refers to appearance of only 10 or less number of colonies in the stock solution. Such stocks are further concentrated and re-analysed for growth.
3. Good growth: Good microbial growth refers to appearance of 15 or more colonies in the stock solution. Such solutions are considered as moderately concentrated in nature.
Thus, based upon the above mentioned qualitative analyses, the nature of growth can be determined easily.
Human waste, excreted from the digestive system, _____.
Human waste, excreted from the digestive system, _____.
is considered sterile
contains about 50 percent bacterial cells
has passed through the liver
started as food delivered to the stomach via the trachea________ is a common boundary where different parts of a system interact.
Answer:
The answer is the interface
Explanation:
Interface is defined as the surface between two portions of matter or the space in which they have a common boundary. For example, the interface allows to know the separation surface between two liquids. In addition to this, the interface allows molecules or particles to cross the membrane, for example, what happens in the osmosis process.
Which molecules do mammals use to store extra glucose in their muscles?
A.Starch
B.Glycogen
C.Baleen
D.Myosin
its b hope this helps you out bc it did me
Serotonin is derived from the amino acid tryptophan and is an important neurotransmitter.
a. True
b. False
Which types of vaccines described on the website are examples of live vaccines? explain your reasoning?
What do you get when you cross a shark with a snowball?
if you start with a single bacterium, capable of dividing every 20 minutes, how many bacteria would you have after just 4 hours
Answer:
4096
Explanation:
Multiple 1 (original bacterium) by 2, 12 times
1*2*2*2*2*2*2*2*2*2*2*2*2 = 4096
4096 bacteria would be present after 4 hours as they grow via binary division.
What is bacteria?Bacteria is prokaryotic unicellular microorganism.They are found in extreme harsh conditions.Bacteria has hair like structure that helps in their locomotion.Bacteria grow through binary division.What do you mean by binary division?It is a type of cell division in which one cell give rise to two identical daughter cells.As it is given that bacteria divides at every 20 minutes mean 2 cells are formed from 1 cell. And after 40 min 8 (2∧n) bacterial cells are present.
After 4 hours i.e., 240 min= 240/20=12.
So 2∧12 = 4096 cells are present.
Hence, the answer is 4096 bacterial cells.
To know more about binary division here
https://brainly.com/question/11013499
#SPJ2
All _____ stimuli and responses are inborn, such as salivating at the sight of food.
Which memory system is preserved the longest, even into alzheimer's disease?
Which two factors can speed up the process of evaporation?
The membranes of neurons at rest are very permeable to _____ but only slightly permeable to _____. hints the membranes of neurons at rest are very permeable to _____ but only slightly permeable to _____. na+; cl– k+; na+ k+; cl– na+; k+
Neuronal membranes at rest are highly permeable to potassium ions (K+) and slightly permeable to sodium ions (Na+), which contributes to the neuron's resting membrane potential.
The membranes of neurons at rest are very permeable to potassium (K+), but only slightly permeable to sodium (Na+). In its resting state, a neuron's cell membrane has numerous potassium leak channels that allow for the efflux of K+ ions, contributing to the negative resting membrane potential inside the neuron. On the other hand, the permeability of the neuron's membrane to Na+ is significantly lower; there are very few sodium leak channels, and the Na+ ions that do enter are actively pumped out by the sodium-potassium pump.
How does inappropriate land use, such as removing vegetation from hillsides and plowing fields parallel to a hillside, affect the erosion rates of that landscape? Explain your answer.
Answer:
increase in erosion
Explanation
i just tuck the test 3.17
Which term do biologists use to describe the average number of individuals of a species per unit area?
Population density is the right term.
Population density of any species (plant, animal or humans) is the number of individuals found in a given unit of area. It is usually expresses as “X” species in “Y”
X = number of species
Y = unit of area , it can be square feet, Square meter, Square kilometer, Square yard etc.
For example , population of 1000 insects living in an area fo 1000 square feet has a population density of 1000/1000 insects per square feet = 1 insect per square feet.
HELP PLEASDE I NEED TO PASS
Decomposers consume nonliving organic matter. Please select the best answer from the choices provided T F
Which part of the reproductive system and a fluid that provides a source of energy for the active sperm?
The wolves and moose of Isle Royale are the focus of the longest-running study of a predator-prey system in the wild. Both are recent arrivals to Isle Royale: moose swam to the island in the early 1900’s. Wolves followed decades later, traveling over the ice from Canada in the 1940’s.About 40 years into the study, the wolf population crashed when humans introduced the canine-parvovirus. Additional factors over the years have impacted both populations. At one point during the study, the moose population collapsed during the most severe winter on record followed by an outbreak of moose ticks. What point on the graph represents the outbreak of moose ticks and a drastic decline in the moose population? A) Point A B) Point B C) Point C D) Point D
The question asks for a point on a graph which indicates an outbreak of moose ticks and a rapid decline in the moose population in the context of a predator-prey system study. The point of interest should show a notable drop in the moose population, after a decrease due to a harsh winter and before any significant downward trend in the wolf numbers.
Explanation:Without the accompanying graph, it's difficult to definitively point out which point represents the outbreak of moose ticks and the consequent drastic decline in the moose population. However, given the context, you'd want to look for a point in the graph where there's a significant drop in the moose population. This point should fall after the first major decrease representing the severe winter and before any major decreases in the wolf population, if such data is represented in the graph. An understanding of the predator-prey system and effects of disease outbreaks on such systems can aid interpreting the graph.
Learn more about Understanding Graph Representation here:https://brainly.com/question/36444438
#SPJ12
What are the benefits/risks associated with the addition of antibiotics and genetically modified
e. coli to cattle feed?
In which days of mansturation cycle no egg will be there ?????
Final answer:
The menstrual cycle includes a phase called ovulation, typically around day 14 of a 28-day cycle, when an egg is released and can be fertilized. Outside the context of ovulation and after menopause, no viable eggs are present or released.
Explanation:
The question is addressing the menstrual cycle and the availability of an egg for fertilization. In a typical cycle, ovulation occurs around the midpoint of the cycle, nearly day 14 of a 28-day cycle. However, eggs are not available at all times during the menstrual cycle. During menopause, which usually happens to women in their mid-40s to mid-50s, the ovaries lose their sensitivity to Follicle Stimulating Hormone (FSH) and Luteinizing Hormone (LH). As a result, menstrual periods become less frequent and finally cease, leading to the point where no eggs are matured and released, making natural conception impossible.
Moreover, outside of the reproductive years and outside the ovulatory phase of the menstrual cycle, eggs are not mature or released. During menstrual cycles, an egg, once released during ovulation, is viable for fertilization for only about 12-24 hours. If it is not fertilized within this time frame, it will degenerate and be reabsorbed by the body. If fertilization does not occur, the menstrual cycle progresses to menstruation, and the cycle starts anew without an egg present until the next ovulation.
A camel's hump is an example of what adaptation
The release of endotoxins as bacteria are destroyed by phagocytes causes the phagocytes to release tumor necrosis factor (tnf). the life-threatening loss of blood pressure due to the action of tnf is called __________.
What stomach secretion is needed to produce mature erythrocytes?
How does the serratus anterior function as an antagonist to the rhomboid muscles?
The serratus anterior functions as an antagonist to the rhomboid muscles by performing protraction of the scapula, which is the opposite action of the rhomboids' retraction of the scapula.
Explanation:The serratus anterior is a large and flat muscle that originates on the ribs and inserts onto the medial border of the scapula. Its primary function is to pull the scapula forward and around the rib cage, a motion known as protraction. This movement is opposite to that of the rhomboid muscles, which retract the scapula by pulling it towards the vertebral column.
Antagonistic muscles have opposite actions. When the serratus anterior contracts, it works against the rhomboids. If the rhomboids are contracting to bring the scapula medially (retraction), the serratus anterior will be relaxed. Conversely, when the serratus anterior contracts to move the scapula laterally (protraction), the rhomboids will be relaxed. This opposition is what makes the serratus anterior an antagonist to the rhomboids.
Cell division seems to be limited by the length of chromosomal structures called ____________.
Please Help!!! 10 Points! ASAP! Will Mark BRAINLIEST! ☺♥ thx
How are codons like words in an instruction manual?
A. They tell cells the specific sequence of amino acids for making a protein.
B. They are made up of 26 different nucleotides that are like letters of the alphabet.
C. They tell cells the specific sequence of nucleic acids for making a nucleotide.
D. They are made up of 20 different nucleotides that each stand for one kind of amino acid.
They tell cells the specific sequence of amino acids for making a protein.
Which statement is true about the rates of cell division in eukaryotes?
A. They remain the same for the life of the organism
B. They are faster than that of prokaryotes
C. They increase with the age of the organism
D. They vary greatly within an organism
Eukaryotic cells multiply at varied speeds. Yeast cells divide and double in 2 hours, but plant and mammal cells take 10–20 hours. Therefore, option (D) is correct.
Why do prokaryotic cells divide faster than eukaryotic cells?Prokaryotic cell division, also known as binary fission, is a simpler and more rapid process than eukaryotic cell division. Bacterial populations can expand quite quickly due of how quickly their cells divide. Prokaryotic cells can replicate more quickly than eukaryotic cells because they typically only contain one circular chromosome. A prokaryotic cell can really go through two cycles of DNA replication before the cell divides.
Eukaryotic cells multiply and develop at remarkably varied speeds. While the majority of plant and animal cells take between 10 and 20 hours to divide and multiply, yeast cells may do so in just 2 hours.
Learn more about cell division, here:
https://brainly.com/question/2222880
#SPJ2
ï‚· how many cells are produced at the end of mitosis and meiosis