Answer:
- The ras proto-oncogene is converted into an oncogene
- Specific transcription factors are activated by phosphorylation
- Abnormally rapid cell growth and proliferation is induced
Explanation:
The Ras genes are proto-oncogenes, i.e., genes with oncogenic potential that may induce cancer. These genes (Ras) encode GTPase proteins involved in transducing survival and growth signals. When Ras genes suffer mutations, the resulting Ras proteins may remain in an active state that prevents the hydrolysis of GTP, thereby the Ras pathway remains constitutively activated. In consequence, mutated Ras genes function as oncogenes by constitutively activating MAP kinases which in turn activate transcription factors that control the expression of target genes involved in critical cellular processes and whose expression is associated with cancer-specific events (eg., increased angiogenesis, increased cell proliferation, reduced apoptosis, etc).
4. What advantage do plankton gain by storing lipids within their bodies?
a. It makes them less dense than water, thus aiding in buoyancy.
b. It forms air pockets that makes them more buoyant.
c. It allows them to store large amounts of energy.
d. It makes their cells heavier so they sink into the water.
e. It increases their density so they sink into the water.
Answer:
Option A, It makes them less dense than water, thus aiding in buoyancy
Explanation:
Lipids stored with in the body of planktons make them capable to float in water against the buoyancy force of water in the down ward direction by reducing the overall density of the planktons. Hence, option A is correct
Which description accurately describes the cell membrane?
a. a single permeable layer of phospholipids that have hydrophobic heads and hydrophilic tails
b. a semi-permeable double layer of phospholipids that have hydrophilic heads and hydrophobic tails
c. a single permeable layer of phospholipids that have hydrophilic heads and hydrophobic tails
d. a semi-permeable double layer of phospholipids that have hydrophobic heads and hydrophilic tails
e. a barrier of polypeptides that prevents molecules from entering or leaving the cell
Answer:
b. a semi-permeable double layer of phospholipids that have hydrophilic heads and hydrophobic tails
Explanation:
B is correct as the cell membrane is selectively semi-permeable. It is selectively semi-permeable because this quality allows it to control what can and can't enter the cell, and how it does so.
The cell membrane also has a phospholipid bi-layer comprised of a double layer of phospholipids which have hydrophilic head and hydrophobic tails. This is because the heads are made of phosphate and are polar and are therefore attracted to water (hydrophilic), while the tails are made of lipids (i.e. fats, oils) which do not mix with water and are therefore hydrophobic.
The properties of each phospholipid is also why they form the double layer structure, the hydrophilic heads naturally face outwards into the water and protect the hydrophobic tails on the inside.
Hope this helped!
Tissue that carries messages throughout our bodies
what is an example of mitosis at work is a leaf?
Renewable Energy is the best solution to Coal, Petroleum, Nat Gas, and Nuclear
True or false
Explanation:
coal , petroleum,Net Gas , Nuclear are the non renewable source of energy .
so
False is the answer of your question
why animals need to move quickly
Answer:
Animals move for a variety of reasons, such as to find food, a mate, a suitable microhabitat, or to escape predators. For many animals, the ability to move is essential for survival and, as a result, natural selection has shaped the locomotion methods and mechanisms used by moving organisms.
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Which Texas ecoregion described below was formed due to weathering and erosion? A Edwards Plateau - home to rare organism that live in canyons B. Piney Woods - high density of vegetation, pines, oaks, and croplands with nutrient rich soil CC Crosstimbers - high concentration of trees, plains and parries with soil that drains water easily D Post Oak Savannah - transitional area of plant life ranging from grasslands to forests with fertile soll can yi
Answer:
d
Explanation:
because
Question 3
Which of the following refers to a community of living organisms and the way they interact with nonliving parts of their environment?
А
trophic
В
biome
С
habitat
D
ecosystem
Answer:
Which of the following refers to a community of living organisms and the way they interact with nonliving parts of their environment? Ecosystem.
Explanation:
Hope you have a great rest of your day.
Describe the behavior of the frog heart that you can elucidate from the force recording (e.g., mechanical events). How can you utilize the ECG data (electrical events) to determine which aspects of the force recording are due to atrial contractions and which are due to ventricular contractions
Answer:
P wave and R wave
Atrial contraction = P wave
Ventricular contraction = R wave
Explanation:
The behavior of the frog heart from force recording can be classified into ; P wave and R wave.
utilizing the ECG ( Electrocardiogram) data the aspect of the force recording that is due to atrial contractions is the ; P wave while the force recording that is due to ventricular contractions is the ; R wave the ventricular contractions is also known as QRS
ECG is used to record the electrical activities of a heart at rest
What should be done with a used needle??
Answer:
It should be disposed of because its dirty and no one wants a disease from it if it goes into you somehow
Explanation:
The favorite food of the giant panda is?
bamboo
Answer:
The answer is bamboo.
Explanation:
Pandas eat 12 - 40kg of bamboo everyday
During his dihybrid experiments on yellow round peas and wrinkled green peas , Mendel noticed four phenotypic categories of the f2 progeny with the ratio 9:3:3:1 . explain and show how he came up with the 9:3:3:1 ratio
Answer: stop cheating mr.lazzo, I'm calling your parents
A coin is flipped 150 times. The results of the experiment are shown in the following table:
Heads Tails
84 66
Which of the following statements best describes the experimental probability of getting heads?
It is equal to the theoretical probability.
It is 6% lower than the theoretical probability.
It is 6% higher than the theoretical probability.
The experimental probability cannot be concluded from the data in the table.
Answer:
it is 6% higher than the theoretical probability.
Explanation:
we start with out experimental.
84 times heads out of 150.
84/150 = 56.
=56%
now for theoretical.
since there are 2 sides, there are 2 chances of randomly getting heads.
1/2 = 50%
56% > 50%
therefore your answer is that it is 6% higher. hope my explanation helps!
Genetic recombination occurs in species that reproduce
(1 point)
o through cell division.
O asexually.
O sexually.
O through budding.
Answer:
through cell division :)
Explanation:
Genetic recombination occurs due to the crossing over event that takes place during meiosis. It occurs in the animals that reproduce by fusion of gametes, i.e., option C.
What is genetic recombination?Genetic recombination is the formation of new genetic sequences as a result of crossing over.
It takes place in the germ cells forming gametes, which is the main reason behind variation.
Thus, the correct option is C.
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Strawberry poison dart frogs have different skin colors within their population. The frogs can be categorized broadly using the colors green, blue, yellow, and red. A
researcher performs an experiment using colored clay frogs to represent the different types of frogs to investigate which color morph is preyed upon the most by
snakes. The researcher compares the number of snake attacks on each of the four different colored clay frogs.
200-
150-
Number of Attacks
100
50-
0
green
Blue yellow red
Color of Clay Frogs
Which distribution of strawberry poison dart frogs is likely to exist in nature?
There will be more red-colored frogs in the population than green-colored frogs.
There will be more yellow colored frogs in the population than red-colored frogs
There will be more green colored frogs in the population than yellow-colored frogs.
There will be more blue colored frogs in the population than yellow-colored frogs.
Answer:
There will be more yellow-colored frogs in the population than red-colored frogs
Explanation:
Available data:
Strawberry poison dart frogs have different skin colorsThe frogs can be categorized broadly using the colors green, blue, yellow, and red.Frogs eaten by snakesNumber of snake attacks Frog color
145 Approx Green
180 Approx Blue
125 Approx Yellow
145 Approx Red
The phenotype of individuals and the environment where they live, interact and determines the genes´ destiny in space and time. The result of this interaction and the gene destiny is Natural Selection. Natural selection selects beneficial alleles and increases their frequency in the population.
The attack by snakes is acting as a selective pressure on the frogs´ population. It is an ecological pressure that is modeling the frogs´ phenotype.
Animals that suffer more attacks are the blue ones, followed by green and red frogs. Those that suffer the fewest number of attacks are the yellow individuals.
So natural selection will be acting on this population favoring the alleles that code for yellow color. Genes that express yellow color increase more the frogs´ fitness than genes that code for the other colors. So natural selection increases the frequency of genes coding for yellow color and will decrease the frequency of the other alleles. Probably the less favored will be genes that express blue.
Which of the following best describes the effect the moon has on the tides?
A
The gravity of the moon pulls the ocean, which causes the tides.
B
When the moon is invisible in the sky, tides cannot be seen.
C
Tides only happen at night when the moon is visible.
D
The moon’s light makes it possible to see the tides at night.
Answer:
A The gravity of the moon pulls the ocean, which causes the tides.
Explanation:
Well all of the other answers are just completely different.
if the moon is invisible tides cannot be seen, but why is it at night it is called high tide. B is very odd because many surfing events happen during the day.
It is A because it contains the most context, because it is the only reliable and realistic option, because when the moon is up, and the sun is down, it causes stronger waves
Factors that inhibit photosystem II
Answer:
Inhibition of the activity of photosystem II (PSII) under strong light is referred to as photoinhibition. This phenomenon is due to an imbalance between the rate of photodamage to PSII and the rate of the repair of damaged PSII.
This is the Answer for your question :3
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Fill in the blanks about each of the following sequential steps of the electron transfer chain (ETC) of the inner mitochondrial membrane.
a. The initial electron donor of the ETC is _______________, which hands its two electrons off to FMN, within Complex I.
b. Electrons from both Complex I and Complex II are ultimately donated to the same molecule, ____________.
c. Within Complex III, electrons from ubiquinol are ultimately donated to ______________, which then passes those electrons on to Complex IV.
d. ______________ is the final electron acceptor of the ETC.
e. The downhill movement of electrons through the ETC creates a proton gradient across the inner mitochondrial membrane. The _________________ subunit of the ATP synthase creates a channel that allows for the downhill movement of protons from the intermembrane space to the matrix.
f. The concomitant release of free energy drives the synthesis of ATP by the ____________ subunit of that same protein.
Answer:
a. NADH
b. Ubiquinone
c. Cytochrome c
d. Oxygen
e. F0 subunit
f. F1 subunit
Explanation:
Electrons enter the Electron Transport Chain (ETC) from Nicotinamide Adenine Dinucleotide (NADH), which is an electron donor generated during different catabolic reactions (e.g., glucose oxidation). Ubiquinone or 'Coenzyme Q' is an electron acceptor that accepts electrons from both Complex I and Complex II and donates electrons to Complex III. The oxygen (O) is the final electron acceptor that accepts the electrons after they have passed through the ETC and ATPase. Complex III (also known as Ubiquinol-cytochrome c oxidoreductase) catalyzes the electron transfer from ubiquinol to Cytochrome c, which is coupled to proton translocation across the membrane. The F0 subunit of the ATP synthase forms a channel (embedded in the mitochondrial membrane) through which protons can flow. Moreover, the F1 subunit of the ATP synthase uses the energy released by the proton electrochemical gradient to drive the synthesis of ATP.
2. When an object gets warmer it is:
a. loosing energy
b. keeping the same energy
c. gaining energy
Choose one correct answer.''
PLEASE HELP ASAP!!!!
Which part of the circulatory system is responsible for carrying oxygen to cells and tissues?
plasma
venule
erythrocyte
leukocyte
Answer:
Erythrocyte
Explanation:
Erythrocytes, or otherwise called, red-blood cells are responsible for transporting oxygen and carbon dioxide to and from the cells and tissues. The reason for this is because of a protein called hemoglobin. The hemoglobin found in erythrocytes allow for transportation of oxygen + CO2 to and from cells.
The circulatory system is responsible for carrying oxygen to cells and tissues is erythrocyte. Thus, option "C" is correct.
What is Erythrocytes?Erythrocytes are also called, red-blood cells are responsible for transporting oxygen and carbon dioxide to and from the cells and tissues. The reason for this is because of a protein called hemoglobin.
The hemoglobin found in erythrocytes allow for transportation of oxygen + CO2 to and from cells.
Thus, option "C" is correct.
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1. Heredity is...
A. the passing of acquired traits from parents to offspring
B. the complete analysis of the fossil record
C. the passing of traits from parent to offspring
D. the relationship between humans and bacteria
_____________________
2. Recessive traits are
A. traits that everyone wants
b. traits that shown over other traits
C. traits that are hidden by other traits
D. traits that no one wants
Answer:
1. Hereditary is
A. the passing of acquired traits from parents to offspring
2. Recessive traits are
C. traits that are hidden by other traits
PLEASE HELP!!!!!!
The process that produces 2 genetically different cells is
A) mitosis
B) mitosis and meiosis
C) meiosis II
D) meiosis I
Answer:
b
Explanation:
Meiosis has both similarities to and differences from mitosis, which is a cell division process in which a parent cell produces two identical daughter cells. Meiosis begins following one round of DNA replication in cells in the male or female sex organs.
So, if life started aquatic how did it evolve for land and why?
Answer:
So when the first animals moved onto land, they had to trade their fins for limbs, and their gills for lungs, the better to adapt to their new terrestrial environment
Explanation:
Answer:
abilites
Explanation:
Which of the following could be a function of a phagocyte?
Choose 1 answer:
Acting as a physical barrier against pathogens
Activating B cells
с
Engulfing a foreign pathogen
D
Making antibodies specific to a pathogen
C.Engulfing a foreign pathogen
Explanation:
Phagocytosis is a critical part of the immune system.
Several types of cells of the immune system perform phagocytosis, such as neutrophils, macrophages, dendritic cells, and B lymphocytes.
The act of phagocytizing pathogenic or foreign particles allows cells of the immune system to know what they are fighting against.
Question:
Imagine that you're an endocrinologist and a patient visits you because they constantly feel restless. You notice that they have a high heart rate and high blood pressure, even at rest.
Which of the following statements best describes a possible diagnosis to explain these symptoms?
Answer: CORRECT (SELECTED)
The patient is experiencing an issue with their adrenal glands, causing a hyper-secretion (over-secretion) of adrenaline hormone.
Explanation:
Normally, the "fight-or-flight" response only occurs at times of emergency. Because this patient is experiencing symptoms of the "fight-or-flight" constantly, they have too much adrenaline in their body due to hyper-secretion from adrenal glands.
Pls help asap which property of water is the most direct cause within the ? ) Water is a versatile solvent Water is a polar molecule Water a high heat capacity Water has a high surface tension
Answer:
A.
Explanation:
Where is air density greater on the mountain
Answer:
the bottom
Explanation: The air at the top of the mountain is going to be much less dense than the air at the bottom of the mountain because it is affected less by gravity.
Mitosis creates...
A) 4 identical cells
B) 2 identical cells
C) 4 unidentical cells
D) 2 unidentical cells
Answer:
B) 2 identical cells
Explanation:
"Mitosis is a type of cell division which produces two identical diploid daughter cells. "
A 20.0 gram sample of a certain radioisotope decays over a
period of 19.2 hours. After that time, only 2.50 g of the isotope
remains. Calculate the half-life.
quantity of the substance remaining = initial quantity of the substance * (.5)^(time elapsed/half life of the substance)
2.50 = 20 * (.5)^(19.2/x)
The half-life period of the given sample of the radioisotope is equal to 6.41 hours.
What is the half-life period?The half-life of a radioactive substance is defined as the time that is required to reduce the original quantity of a radioactive element to half after decay.
Half-life of a radioactive element is the characteristic of the element and does not depend upon the initial amount of the radioactive substance.
Given, the original amount of the radioisotope, N₀ = 20.0 g
The remaining amount of the radioisotope, N = 2.50 g
The time for which decay occurs, t = 19.2 hours
Consider that k is the rate constant of the decay of radioisotope,
[tex]k =\frac{2.303}{t} \times log \frac{N_0}{N}[/tex]
[tex]k =\frac{2.303}{19.2} log \frac{20}{2.50}[/tex]
k = 0.108 hr⁻¹
The half-life time of radioisotope can be calculated from the below mentioned formula:
[tex]t_{\frac{1}{2}} =\frac{0.693}{k}[/tex]
[tex]t_{\frac{1}{2}} =\frac{0.693}{0.108}[/tex]
[tex]t_{\frac{1}{2}} =6.41 hrs[/tex]
Therefore, the half-life period of the given sample of the radioisotope will be to 6.41 hours.
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7. Which of the following describes the role of cyclic AMP
(CAMP) in hormone response?
A. cAMP opens a pore for steroid hormones to enter the
nucleus.
B. CAMP receives a message from a nonsteroid hormone
and carries the message into the cell.
C. cAMP receives messages from mRNA to begin protein
synthesis.
D. CAMP are molecules that bind and captures the
nonsteroid hormone.