Rb is an important protein for controlling cell proliferation by blocking entry into S phase. How does it exert its effect?
Answer:
The main function of the RB protein is to inhibit the transition from the G1 to S phase. Its activity depends on its phosphorylation state: if RB is not phosphorylated (active state), it is bound to the transcription factor E2F, preventing its translocation to the nucleus and the activation of genes necessary for DNA synthesis; and if it is phosphorylated, by cyclin-CDK complexes, E2F is released and cell proliferation occurs.
Explanation:
Retinoblastoma (Rb) was the first tumor suppressor described and, as we know today, mutations in its structure determine a large number of cancers. Structurally, we speak of a large and multifunctional protein; which is organized in different domains. The activity of this protein is regulated, mainly, by phosphorylation at multiple sites described over the years and is involved in control mechanisms of the cell cycle, apoptosis and senescence.
In three to four sentences explain both the positive and negative effects of mutations.
Answer:
By the same token, any random change in a gene's DNA is likely to result in a protein that does not function normally or may not function at all. Such mutations are likely to be harmful. Harmful mutations may cause genetic disorders or cancer. A genetic disorder is a disease caused by a mutation in one or a few genes
⬆️⬆️⬆️⬆️⬆️⬆️ all them
I need help pls it science btw
Answer:
a light year is 2 seconds
Imagine you were going to build a “green” building. What features would it have? What would it look like? How would it harmonize with the environment around it? Describe your green building using language that appeals to the senses (sight, sound, taste, touch and smell).
Answer:
Green building is a modern concept in architecture by means of which it is aimed at construction developments that are not invasive with the environment, or that affect the ecosystem in which they are built as little as possible, with the aim of leaving future generations an intact environment worth living in.
Thus, for a construction to conform to this concept, it must follow the following parameters:
-The construction must adapt to the natural environment, and not this to the construction.
-It has to be resource-efficient. Furthermore, the materials used must not be exploited indiscriminately or causing damage to the environment.
-The external area of the building must respect the natural patterns of the area where it is built, favoring a harmonic view between the building and the surroundings.
-Use of clean and renewable energy to supply the building.
How is the way scientists use the word theory different from the way people use the word in everybody language
why is it important for scientist who study more than the organisms that live there
Answer:
Ecological scientists study organism-environment interactions across ecosystems of all sizes, ranging from microbial communities to the Earth as a whole. In its life and reproduction, every organism is shaped by, and in turn shapes, its environment.
Explanation:
5.2x10^-23 grams Nitrogen to atoms
Answer:
2.23 atoms
Explanation:
In this question, we first need to change the mass of Nitrogen to moles by using the formula;
mole = mass ÷ molar mass
Molar mass of Nitrogen = 14g/mol
Mass = 5.2x10^-23 grams
mole = 5.2x10^-23 ÷ 14
mole = 0.371 × 10^-23
mole = 3.71 × 10^-24 mol
Number of atoms in Nitrogen atom = 3.71 × 10^-24 mol × 6.02 × 10^23 atoms (avagadro constant)
= 22.3342 × 10^(-24+23)
= 22.33 × 10-¹
= 2.233 × 10°
= 2.23 atoms
special features of a paramecium
Answer:
Paramecium is a single cell, living organism that can move, digest food, and reproduce.
Explanation:
Paramecium is a microorganism, which means that it is visible only under a microscope.
The paramecium has a contractile vacuole. It moves in spiral movements, rotating around an invisible axis.
It has no sense of sight, taste, touch, or hearing. However, he has some sense of movement.
Compare and contrast the light reactions of photosynthesis with the Calvin cycle reactions
Answer:
Just as the name implies, light-dependent reactions require sunlight. ... Light-dependent reactions, which take place in the thylakoid membrane, use light energy to make ATP and NADPH. The Calvin cycle, which takes place in the stroma, uses energy derived from these compounds to make GA3P from CO2.
If this helped you, please mark my answer the brainliest, (by clicking the little crown on my answer), it really helps a lot ! (づ｡◕‿‿◕｡)づ
Light-dependent reactions of photosynthesis occur on the thylakoid membrane. In this type of reactions energy from the sun is absorbed by the pigment chlorophyll of the chloroplast.
The reactant is water, ADP and the product formed is oxygen, ATP and NADPH.This reaction occurs during the daytime.Major protein complexes located in the thylakoid layers are ATP synthase, cytochrome B6f complex, Photosystem I and II.Calvin cycle is a light-independent reaction that happens in the outer membrane of the thylakoid called the stroma.
In this process, plants utilize carbon dioxide from the atmosphere to convert them into food.Calvin cycle completes using four actions: carbon fixation, modification, carbohydrate production and regeneration state.The outputs from the light-dependent reaction act as the reactants in this cycle.The end result of the Calvin cycle is the molecule of PGAL.To learn more about light-dependent and independent reactions follow the given link:
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What would you expect to happen if you moved a marble statue from a hot, wet climate to a cool ,dry climate?
The rate of mechanical weathering would speed up.
The rate of chemical weathering would slow down.
The rates of any type of weathering would be unaffected.
The rate of chemical weathering would speed up.
Answer:
The answer is B
Explanation:
Hot and wet climates can cause rapid weathering in things like statues but moving the marble statue to an area of less humidity and cooler temperatures would greatly decrease the rate at which the statue would weather away.
If a marble statue is moved from a hot, wet climate to a cool, dry climate, the rate of chemical weathering would slow down. Therefore, option (B) is correct.
What is chemical weathering?Chemical weathering is the process of breaking down rocks and minerals through chemical reactions. This type of weathering involves a variety of chemical processes that can alter the composition and properties of rocks and minerals, making them more susceptible to erosion and decay.
Common examples of chemical weathering include the oxidation of minerals, dissolution of limestone, and hydrolysis of silicates. Over time, chemical weathering can have a significant impact on the landscape, shaping it through the breakdown and transformation of rocks and minerals.
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Winston studies a topography map that shows camping and hiking areas. Winston is most likely using the map for which purpose? science engineering government recreation
Answer: D Recreation
Explanation:
camping and hiking are recreational activites so D is the correct answer
Winston is most likely using the map for recreation. Thus, the correct option for this question is D.
What is a Topography map?A topography map is characterized as a type of map which indicates detailed graphic representations of features that appear on the Earth's surface.
Examples of such features in topographic maps may include roads, buildings, urban development, railways, airports, names of places and geographic features, national and international boundaries, etc.
Recreational activities like hiking and camping are most probably related to features that are undoubtedly based on the topographic maps of the geographical locations.
Therefore, Winston is most likely using the map for recreation. Thus, the correct option for this question is D.
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When the land or oceans are heated unevenly,
form.
OA.
ocean waves
OB. convection currents
OC. heavy fogs
OD. solar patterns
Answer:
i need help no really i need help too!
Explanation:
After examining the picture, which of the following formations is most likely the oldest?
Bed B
Bed D
D-i-k-e M
Bed C
Answer:
Bed D is the oldest
Explanation:
Hope this helps also the bed that are on the lowest portion is always the oldest layer.
Answer: The answer to your question is bed D
Explanation: If you look at the coloring and the way its position is you can tell it's the oldest. It is the darkest bed and it's kinda like curving downward which indicates it's pretty old...
Hope this helps I know I'm late... But I still hope this helps
I also hope everyone has a great day today I know that times are tough right now, but let's get through it with a smile <3
How are extrusive rocks formed?
Answer:
Extrusive, or volcanic, igneous rock is produced when magma exits and cools above (or very near) the Earth's surface. These are the rocks that form at erupting volcanoes and oozing fissures.
Explanation:
Answer:
c
Explanation:
bc its the right answer
What is the cell membrane made of. Proteins. Cellulose. Carbohydrates. Lipids
With few exceptions, cellular membranes — including plasma membranes and internal membranes — are made of glycerophospholipids, molecules composed of glycerol, a phosphate group, and two fatty acid chains. Glycerol is a three-carbon molecule that functions as the backbone of these membrane lipids.
hopeeee this helped <3
Answer:
A, b, d
Explanation:
eng2021
which characteristic allows carbon to form chains and rings eith other carbon atoms
12. Describe how the structure of a frog's tongue is adapted to its diet.
13. Label the structures depicted in the following diagrams using the terms provided.
Answer:
It has a sticky and long tongue.
Explanation:
The structure of a frog's tongue is adapted to its diet because the frog has a sticky and long tongue. This stickiness helps to hold its food tightly while the more length of the tongue helps to catch prey that is far from the frog. Tongue of the frog is attached to the front of the mouth as compared to the back of the mouth. The frog's tongue then snaps back after catching its prey and throws the food down its throat.
Frogs have sticky tongues and their tongues can grab hairy, sticky, and slippery surfaces with ease.
The tongue of frogs is connected at the front of the lower jaw. They're not connected at the back of their throats like most organisms.
It should be noted that the frog projects the tongue out of the mouth through the use of an inertial projection mechanism. In this case, the jaw rapidly opens, the tongue rotates and the inertia of the tissue then leads the tongue to project toward its prey.
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Water molecules made by living things become part of the water cycle
through
A. aerobic respiration
B. the dark reactions
C. alcoholic fermentation
D. the Krebs cycle
Answer:
D
Explanation:
One cycle of the Krebs Cycle consumed 2 water molecules.
Pls answer as many questions of the remaining numbers as you know of the water cycle. Please help I forgot
Answer:
Explanation:
4. Hot water
5. Steam
6. Cold air
7. a dew type thing
those are the only ones i know. I hope this helps you!!
I include bases guanine, cytosine, and adenine.
DNA ONLY
RNA ONLY
DNA AND RNA
The Punnett square below shows the results of a cross between a plant with red flowers and a
plant with white flowers,
R
R
w
RW
RW
w
RW
RW
Кеу
RR red
ww-white
RW - pink
Based on the results, record the percentage of each color offspring from cross in this table
Percentage of red plants
I
Percentage of white plants
Percentage of pink plants
Please help with #20
Hi!
Answer:
Percentage of red plants: 0%
Percentage of white plants: 0%
Percentage of pink plants: 100%
Explanation:
The reason is because underneath where it says the "key" is, it says that if you see RR it would be red.
There is no RR in any of the 4 boxes. Which means it would be 0%.
Same for the white, there is no WW in any of the boxes. Therefore 0%.
For the pink, you have all of the 4 boxes filled with the letters RW. That means they would all be pink! 100% would be your answer.
I hope this makes sense and helps you!
How do you get energy from ATP?
Break off the first phosphate
Break off the second phosphate
Break off the third phosphate
Break off the Adenine
Answer:
gratciat
Explanation:
Which of the following would be expected to have plentiful access to potable water?
a. Africa
b. China
C. Europe
d. South America
Answer:
c. Europe
Explanation:
I just went to quizlet.com
Europe is expected to have plentiful access to potable water.
What is Potable water?Thus is the type of water which is suitable for human consumption. Europe is believed to have plentiful access to potable water.
This is because of less pollution access to aquifers which provide clean sources of water for consumption by the people hence the reason why option C was chosen as the most appropriate choice.
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what is the function of genes?
Answer:
they help in the transfer of hereditary characteristics from parents to offspring
Use what you learned about the troposphere and stratosphere to choose the correct answers from the drop-down menus.
The layers of the atmosphere are characterized by changes in ________
.
The troposphere experiences large changes in _________
.
Airplanes fly best in _____
.
The temperature in the troposphere
as you go higher, and in the stratosphere, it _____
as you go higher. HURRY PLS!!!
Answer:
temperature, weather, the stratosphere,decreases, increases
Explanation:
edge 2020
The layers of the atmosphere are characterized by changes in temperature
Temperature is a physical quantity that expresses hot and cold or a measure of the average kinetic energy of the atoms or molecules in the system
The troposphere experiences large changes in weather
Weather is the state of the atmosphere, describing for example the degree to which it is hot or cold, wet or dry, calm or stormy, clear or cloudy. On Earth, most weather phenomena occur in the lowest layer of the planet's atmosphere, the troposphere, just below the stratosphere
Airplanes fly best in the stratosphere
The stratosphere is the second layer of the atmosphere of the Earth, located above the troposphere and below the mesosphere
The temperature in the troposphere
The troposphere is the lowest layer of the atmosphere, ranging from the Earth's surface to an altitude of about 10–15 km, depending on latitude and time of year. From: Encyclopedia of Atmospheric Sciences (Second Edition), 2015.
as you go higher, and in the stratosphere, it decreases as you go higher
Above the troposphere and below the mesosphere, we have the stratosphere. “Strat” means layer. This layer of our atmosphere has its own set of layers. There are no storms or turbulence here to mix up the air, so cold, heavy air is at the bottom and warm, light air is at the top.Learn more about troposphere and stratosphere
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4. When was the first STS mission?
O 1958
O 1969
0 1981
Answer:
1981
Explanation:
"A new era in space flight began on April 12, 1981, when Space Shuttle Columbia, or STS-1, soared into orbit from NASA's Kennedy Space Center in Florida."
Anticlines and synclines are types of folds created by compressional stresses.
I ONLY HAVE 30 POINTS
True
False
Answer:
True
Explanation:
MM, I took the test
Recognizing the influence of subjective personal experiences and beliefs is the foundation of the __________ that humanistic theorists use to explain personality. A. behavioral perspective B. person-centered approach C. self-perception theory D. phenomenological approach
Answer:
D
Explanation:
Recognizing the influence of subjective personal experiences and beliefs is the foundation of the phenomenological approach that humanistic theorists use to explain personality.
Recognizing the influence of subjective personal experiences and beliefs is the foundation of the phenomenological approach that humanistic theorists use to explain personality.
What is the phenomenological approach?The phenomenological approach is a type of qualitative inquiry that places an emphasis on the lived and experiential components of a given construct, or how the phenomenon is felt at the time it occurs as opposed to what is thought about it or the meaning that is later assigned to it.
Exploring the lived experiences of women undergoing breast biopsy or the lived experiences of family members waiting for a loved one to undergo major surgery are two examples of phenomenology research.
Therefore, the phenomenological method employed by humanistic theorists to describe personality is based on the recognition of the impact of arbitrary, subjective, personal experiences and beliefs.
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What’s the answer pls help
Answer:
endocytosis
Explanation:
Read the passage below and use the information to answer the question that follows. Joey is the oldest of three children. Like his siblings, he has has brown hair and green eyes. His sister likes to dance and his brother is a talented guitar player, but Joey does not like either of these activities. He enjoys basketball. Since Joey is very tall, he plays center on the basketball team at his high school, practicing hard so that he can get a basketball scholarship to college. Which of the following statements about Joey refer to genetic factors? Check all that apply. Joey has brown hair. Joey likes to play basketball. Joey has green eyes. Joey is very tall. Joey hopes to get a college scholarship
Answer:
Joey has brown hair
Joey has green eyes
Joey is very tall
Explanation:
I just checked
✔Joey has brown hair
✔Joey has green eyes
✔Joey is very tall
Edge 2021