Which sequence best describes apoptosis at the G1 checkpoint?
Answer:
The correct answer is "Cdk/cyclin complex is inhibited→ p53 levels rise → p21 production increase".
Explanation:
The missing options of this question are:
A. p53 levels rise → p21 production increase → Cdk/cyclin complex is inhibited
B. p21 production increase → Cdk/cyclin complex is inhibited→ p53 levels rise
C. Cdk/cyclin complex is inhibited→ p21 production increase → p53 levels rise
D. Cdk/cyclin complex is inhibited→ p53 levels rise → p21 production increase
E. p53 levels rise → Cdk/cyclin complex is inhibited→ p21 production increase
The correct answer is option D. "Cdk/cyclin complex is inhibited→ p53 levels rise → p21 production increase".
Apoptosis is a process at which the cells undergo a programmed death. This mechanisms happens at G1 checkpoint first by the inhibition of Cdk/cyclin complex which causes p53 levels to rise and later, an increment of p21 production. First, a cyclin-dependent kinase inhibitor regulates the inhibition of the Cdk/cyclin complex. This causes p53 levels to rise, since p53 is a direct downstream kinase substrate for CDK. Subsequently, p21 production increase as well since p21 is a inhibitor of cyclin-dependent kinases.
In what environment would ice wedging occur?
Answer:Ice wedging is common where water goes above and below its freezing point (Figure below). This can happen in winter in the mid-latitudes or in colder climates in summer.
Explanation:
CAN YOU MAKE ME BRAINLIEST
where stem cells transform to T cells
Answer:
Scientists from the UCLA AIDS Institute and the Institute for Stem Cell Biology and Medicine have derived T-cells from human embryonic stem cells, raising hopes for a gene therapy to combat AIDS. The Proceedings of the National Academy of Sciences reported the findings in its July 14, 2006, online edition.
“We may be able to use human embryonic stem cells to treat T-cell and other blood diseases,” says lead author Zoran Galic, assistant research biologist. “This could be a very important weapon in the fight against AIDS.”
The researchers cultured human embryonic stem cells and incubated them on mouse bone-marrow cells, which in turn converted them into blood-forming cells. Those cells were injected into a human thymus that had been implanted in a mouse. The thymus transformed the bloodforming cells into the T-cells that HIV targets for destruction.
“Our results indicate that it’s possible to decipher the signals that control embryonic stem cells’ development into mature T-cells,” says Jerome Zack, associate director of the UCLA AIDS Institute and professor of microbiology, immunology and molecular genetics. “This way we can eventually repopulate the immune system of patients needing T-cells.”
One of the body’s main defenses against disease, Tcells are manufactured in the thymus. The organ shrinks as we age, weakening the immune system. The scientists anticipate that their findings could give rise to gene-therapy approaches for other diseases related to T-cells such as severe combined immunodeficiency, or “bubble-boy disease.”
Explanation:
Explanation:
T cell progenitors originate in the bone marrow and, through a series of defined and coordinated developmental stages, enter the thymus, differentiate, undergo selection, and eventually mature into functional T cells.
1. These structures are enclosed compartments which are filled with water containing inorganic and organic molecules including enzymes in solution.
Answer:
Vacuoles
Explanation:
Vacuoles have enclosed compartments which are filled with water containing inorganic and organic molecules including enzymes in solution.
Heavy rain can cause _____.
Answer:
hey i think the answer is damage
Explanation:
Collection of abiotic and biotic factors together in an environment__________
A-Ecosystem
B-organism
C-Ecology
D-species
E-abiotic
F-Biotic
G-community
H-population
_______ from forest fires and volcanoes, as well as the decay of dead plants and animals, causes a type of pollution from carbon oxides.
Answer:
Carbon dioxide (CO2)
Explanation:
Carbon dioxide is one of the most common atmospheric gases. It is naturally produced into the atmosphere in the following ways:
- via cellular respiration in organisms
- forest fires
- volcanic eruption
- decomposition of dead matter (plants and animals)
The release of CO2 gas into the atmosphere by one or all of the above listed ways poses a great threat to the environment as it causes a type of pollution. CO2 causes pollution by being a greenhouse gas i.e gases capable of trapping heat. This results or contributes to global warming in the atmosphere.
atoms have a _____ surrounded by __
a negative electron, positive nuclei
b positive electron, negative nuclei
C. Positive nucleus, negative electrons
d. negative nucleus, positive electrons
Explanation:
c.) Postive nucleus, Negative electrons
Answer:
option a
Explanation:
negative electron,positive nuclei
why does air pressure decrease with increasing altitude within earth's atmosphere
Answer:
At higher elevations, there are fewer air molecules above a given surface than a similar surface at lower levels. ... Since most of the atmosphere's molecules are held close to the earth's surface by the force of gravity, air pressure decreases rapidly at first, then more slowly at higher levels.
Explanation:
A unicellular organism with free floating DNA and a cell wall living in the Cape Fear River would be classified into which kingdom
Answer:
The Kingdom Plantae in the Domain Eukarya
Explanation:
I majored in Biology
In fruit flies, curved wings are recessive to straight wings, and ebony body is recessive to gray body. A cross was made between true-breeding flies with curved wings and gray bodies to flies with true-breeding straight wings and ebony bodies. The F1 offspring were then mated to flies with curved wings and ebony bodies to produce an F2 generation.
1. Diagram the genotypes of this cross, starting with the parental generation and ending with the F2 generation.
2. What are the predicted phenotypic ratios of this F2 generation?
3. Suppose the following data were obtained for this F2 generation:
114 curved wings, ebony body
105 curved wings, gray body
111 straight wings, gray body
114 straight wings, ebony body
Conduct a chi-square analysis to determine if the experimental data are consistent with the expected outcome based on Mendel's laws.
Answer:
Population of F2 generation will be formed on 9:3:3:1 ratio.
Explanation:
The predicted phenotypic ratios of F2 generation is 9:3:3:1. Ratio 9 represents straight wings, gray body which are dominant allele, ratio 3 represents hybrid flies having curved wings, gray body, ratio 3 represents hybrid flies having curved wings, ebony body and ratio 1 indicates flies with curved wings, ebony body. The population of F2 generation will be formed on the above ratio.
The study of genes is called genetics.
The correct answer is Population of the F2 generation will be formed on the 9:3:3:1 ratio.
What is a dihybrid cross?When more than two characters are crossed to form a new breed is called a dihybrid cross.
The predicted phenotypic ratio of F2 generation is 9:3:3:1. Ratio 9 represents straight wings, gray bodies which are dominant allele, ratio 3 represents hybrid flies having curved wings, gray body, ratio 3 represents hybrid flies having curved wings, ebony body and ratio 1 indicates flies with curved wings, ebony body. The population of the F2 generation will be formed on the above ratio.
Hence, the correct answer to the question is mentioned above.
For more information about the genes, refer to the link:-
https://brainly.com/question/14688752
If there is 24% adenine present in a dna helix how much thymine would be present
Answer:
24 % Thymine (T)
Explanation:
Chargaff's rules indicate that in double-stranded DNA, the proportion of Adenine (A) is equal to the proportion of Thymine (T), while the proportion of Guanine (A) is equal to the proportion of Cytosine (C). Since double-stranded DNA has 24% A, it means there will be 24% T.
Moreover, in this case, the A + T content in the double-stranded DNA is 24 + 24 = 48%, while the G + C content is 48 - 100 = 52%, i.e. G = 26% and C = 26% (26 + 26 = 52).
Gizmo River Erosion Answer Key
Can someone please give me the answer key :( Ill give brainliest
Answer:
sure
Explanation:
ok
One of the first electronic applications used for navigation was:
LORAN-C
Sonar
Radar
Radio Direction Finder
Answer: LORAN-RC
Explanation: I had the same question.
Answer:
Sonar
Explanation:
Which of the following is likely abiotic limiting factor of fish in a pond ecosystem? Pollution Disease-causing bacteria Food supply Predators
Answer:
pollution
Explanation:
Answer:
Pollution
Explanation:
Becauc=se it is the only abiotic answer and it would kill the fish limiting the fish.
Heredity information is stored inside the?
Answer:
the nucleus
Explanation:
the nucleus has chromosomes that contain many genes
hope this helps, pls mark brainliest :D
Strawberry plants can reproduce sexually by
producing fruit or asexually by sending out runners.
Runners are extensions of the central stem of the
plant that spread out along the ground and grow
into new strawberry plants.
3. What is the advantage of sending out many
runners from the central stem? What is the
disadvantage to the central plant?
Answer:
ooh fruit sex lol
Explanation:
An organism that converts sunlight to make its own food is called a(n) Choose all that apply.
producer.
producer.
chemotroph.
chemotroph.
autotroph.
autotroph.
heterotroph.
heterotroph.
Answer:what he said^
What prevents acetylcholine from accumulating in the neuromuscular junction and causing a sustained contraction in a normal individual
Answer:
Botulinum toxin
Explanation:
Botulinum toxin is known to hinder the release of acetylcholine into the synaptic cleft at the neuromuscular junction.
This leads to acetylcholine not attaching to its receptors and eventually leading to the inability to have muscle contractions.
Hence, in this case, the correct answer is Botulinum toxin prevents acetylcholine from accumulating in the neuromuscular junction in individuals.
4. When an earthquake occurs, where would shaking be greater? Near the epicenter or away
from the epicenter?
Answer:
The point at the Earth's surface directly above the focus is called the epicenter of the earthquake. At the epicenter, the strongest shaking occurs during an earthquake. Sometimes the ground surface breaks along the fault. Sometimes the movement is deep underground and the surface does not break.Apr
Explanation:
When an earthquake occurs greater shaking appears near the epicenter.
• When two blocks of the Earth suddenly slip past one another the phenomenon that takes place is termed as an earthquake.
• The earthquake occurs when large blocks of the Earth's crust suddenly move past one another at a fault.
• Earthquakes releases energy which results in the shaking of the ground surface.
• The location within the Earth where the beginning of Earthquake takes place is known as the hypocenter or focus.
• The point directly above the focus at the surface of the Earth is known as the epicenter of the Earthquake.
• At the epicenter and close to it, strongest shaking takes place when an earthquake occurs.
• The severity of the earthquake can be expressed in terms of both magnitude and intensity.
• Intensity is based on the observed influences of ground shaking on buildings, people, and natural things. It changes from place to place within the region of the earthquake based on the location of the observer with respect to the epicenter of the earthquake.
Thus, near the epicenter greater shaking will be observed when earthquake takes place.
To know more about:
https://brainly.com/question/14156406
Which of the following is an example of a mechanical wave?
ultraviolet light waves
radio wave
vibrating guitar string
Blue light waves
Answer:
ultra violet light waves
Describe the energy transformation that takes place as the roller coaster moves up the hill and explain how each form of energy changes.
Answer:
A roller coaster ride is a thrilling experience which involves a wealth of physics. Part of the physics of a roller coaster is the physics of work and energy. The ride often begins as a chain and motor (or other mechanical device) exerts a force on the train of cars to lift the train to the top of a very tall hill. Once the cars are lifted to the top of the hill, gravity takes over and the remainder of the ride is an experience in energy transformation.
an organelle that serves as the transport system
Answer:
endoplasmic reticulum (ER)
Explanation:
The endoplasmic reticulum (ER) is an organelle that helps make and transport proteins and lipids.
What effect does continual mowing have on the ecology field
Answer: Mowing increases the likelihood of nonnative species displacing native species.
Explanation:
Answer:
Mowing increases the likelihood of nonnative species displacing native species.
The change in physical traits of different species to survive in their environment is an example of an __________________?
Answer:Evolution consists of changes in the heritable traits of a population of organisms as successive generations replace one another.
Explanation:
need help asap will give brainlist
Answer: the correct answer is the one you have clicked, D
Explanation:
Answer:
D.
Explanation:
which of the following is not an example of responding to stimuli?
a.Maintaining internal ph levels
b. pulling your hand away from something hot?
c.stopping at a red light?
d plants growing towards light?
Answer:
i think the answer is B. As it does not happen as a response to certain action
Explanation:
hope it helps
Cellular Respiration happens in the
(Select all that apply)
Mitochondria
Cytoplasm
Chloroplast
Cell Membrane
Answer:
Mitochondria
Explanation:Cellular respiration occurs in the double-membrane organelle called the mitochondrion.
What is the difference between a primary and secondary reinforcer?
Answer:
Primary reinforcer is innate, secondary reinforcer is a stimulus
Explanation:
While a primary reinforcer is innate, a secondary reinforcer is a stimulus that becomes reinforcing after being paired with a primary reinforcer, such as praise, treats, or money.
Hope this helps!
Brain-List?
Cells of an organism perform the following chemical reaction: 6 CO2 + 6 H2O + → C6H12O6 + 6 O2 To which organism do these cells most likely belong? A. a rubber tree plant B. an earthworm C. a whale D. a rabbit
Answer:
A. a rubber tree plant.
Explanation:
Hello!
In this case, since plants perform a process called "photosynthesis", by which the carbon dioxide and water are taken into the vegetable cell and get transformed into sugar (glucose) and oxygen; the organism the perform the given reaction is A. a rubber tree plant as such reaction shows the aforementioned process. It is important to mention that the rest of them perform cellular respiration, which is the contrary one:
C6H12O6 + 6 O2 → 6 CO2 + 6 H2O
In order to get energy.
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