what does it mean when we say a gene is turned off?

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Answer 1
When a gene is turned off, It no longer provides the directions for making proteins. this means that the proteins needed to fulfill a particular job ( let’s say, tolerate lactose ) aren’t produced.

Related Questions

which statement is not true about electrical synapses?

Answers

They allow the movement of ion through desmorones

PLZ HELP! why it is important to base scientific theories and models on empirical evidence as opposed to other ways of knowing such as religion​?​

Answers

Answer:

A theory not only explains known facts; it also allows scientists to make predictions of what they should observe if a theory is true. Scientific theories are testable. New evidence should be compatible with a theory.

Explanation:

What is the term for the congenital absence of the urinary bladder?

Answers

Answer:

Urinary bladder agenesis

Explanation:

Bladder agenesis may be the result of secondary atrophy of the urogenital sinus, perhaps owing to the lack of distension with urine caused by failure of incorporation of the mesonephric ducts and ureters to develop into the trigone.

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how does the flow rate through capillaries affect the gas exchange rate between the blood in capillaries and interstitial fluid?

Answers

Answer:

the gas starts to bow

Explanation:

The flow rate through capillaries affect the gas exchange rate between the blood in capillaries and interstitial fluid by gas starts to blow.

What is interstitial fluid?

In terms of nutrition, interstitial fluid serves as a sort of refueling station for our cells. Salt, fatty acids, glucose, and minerals like calcium, magnesium, and potassium are all present in interstitial fluid.

Blood capillaries are where the nutrients in interstitial fluid are obtained. Additionally, metabolic waste products can be stored in interstitial fluid.

A continuous glucose monitor will use a formula to offer a near estimate of what our blood glucose level is likely to be at that particular moment because the glucose level in interstitial fluid is not exactly the same as that in our blood.

Therefore, The flow rate through capillaries affect the gas exchange rate between the blood in capillaries and interstitial fluid by gas starts to blow.

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identify the conditions for a standard electrochemical cell.

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Answer:

Explanation:

Standard conditions are those that take place at 298.15 Kelvin (temperature), 1 atmosphere (pressure), and have a Molarity of 1.0 M for both the anode and cathode solutions. ... Electrochemical reactions rarely occur under standard conditions.

PLEASE HELP ME IM TIMED!

Answers

Answer:

D

Explanation:

Actually fat is the best source of energy, since it is time consuming to break down a molecule of fat, carbohydrate is now used as an alternative to that since the molecules are broken down quicker.

a red onion cell has undergone a change, as represented in the diagram below. This change is most likely due to the cell being placed in...

Answers

Salt water.
We can see that the cell is shrivelled meaning osmosis has taken place. So it must be salt water

A red onion cell placed in a saline solution will lose water when water moves from the cell to the surrounding hypertonic medium via osmosis, causing the cell to shrivel up.

What is osmosis?

The passage of solvent molecules from a lower concentration solution to a higher concentration solution across a semipermeable membrane. It is a passive process that occurs without the use of any energy.

Solvent molecule transfer proceeds from low to high concentration regions until the concentrations on both sides of the membrane are equal.

What are the types of osmosis?An isotonic solution contains the same solute concentration both within and outside the cell.

A hypertonic solution has a larger solute concentration outside than inside the cell.

A hypotonic solution contains a larger concentration of solutes inside the cell than outside.

Thus, we can conclude that when a red onion cell is placed in salt water.

As we can see in the diagram the onion cell shrink which means it is placed in salt water which is a hypertonic solution.

So, option (3) salt water is correct.

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_____ mimic the process of natural evolution to generate solutions to optimization and search problems.

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Search algorithms are used to generate solutions to optimization and search problems.

Search algorithms that mimic the process of natural evolution. Search algorithms can be used to generate solutions to optimization and search problems using techniques such as mutation, selection, crossover, and chromosome.

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a critical event in the death of a cell is caused by

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Answer:Apoptosis and autophagy are both forms of programmed cell death. Necrosis is the death of a cell caused by external factors such as trauma or infection and occurs in several different forms.

Explanation:

during which part of the cell cycle does dna replication occur?

Answers

S phase “I think” hope it helps^_^

Label each of the components in the equation below. What type of reaction is shown in the equation? ​

Answers

Answer:

It's an esterification reaction

Glycerol + Fatty acid ---> Triacylglycerol or triglyceride

+3 water molecules

The chemical equations shown depict esterification and dehydration reactions.

What is a chemical equation?

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.

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why is Ten dollars and Ice not a kinetic energy ?

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Answer: They aren't kinetic energy

Explanation: They are not because it is either motionless or at rest.

3. How are the long DNA molecules found in eukaryotes packed into short chromosomes?

Answers

Explanation:

DNA is tightly wound around histones,forming nucleosomes. Nucleosomes are tightly coiled and supercoiled to form chromosomes.

materials are cycled out by the chloroplast and mitochondrion​

Answers

Carbon dioxide, Water, Sugar And Oxygen.

6. Which objects are listed in order of scale from smallest to largest?
Sun, red giant, Earth, galaxy
red giant, Sun, galaxy, Earth
Earth, Sun, red giant, galaxy
galaxy, Earth, Sun, red giant

Answers

Third one, earth sun redgiant galaxy

which of the following is a way that human modification of limiting factors causes unbalance in ecosystems? a. habitat loss b. pollution c. climate changes d. all of the above

Answers

Answer:

D all of the above

Explanation:

The way that human modification of limiting factors causes imbalance in the ecosystem is : ( D ) All of the above

What are limiting factors

Limiting factors are factors contraining the growth of a population in an ecosystem. the modification by humans on these limiting factors causes an imbalance in the ecosytem which leads to loss of habitat, pollution and climate changes.

Hence we can conclude that The way that human modification of limiting factors causes imbalance in the ecosystem is : ( D ) All of the above.

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what is the texture of a butterfly wing.​

Answers

Answer: soft, chalkey

Explanation: .

When muscle tissue is exercising under anaerobic conditions, the production of ______ is important because it ensures a continuous supply of NAD

Answers

Given what we know about the biological mechanisms behind anaerobic exercise, we can confirm that the production of lactate ensures a continuous supply of NAD.

In order for us to undergo any physical exercise, it is imperative that we are able to produce energy within our cells. The energy used by cells is in the form of a molecule by the name of ATP, which is produced primarily through a process known as Glycolysis.

This is relevant given that in order for glycolysis to happen, a key protein is required known as NAD+. Lactate is produced from pyruvate only under anaerobic conditions because these are conditions that lack oxygen which is the only other source of NAD+, therefore, pyruvate must be converted to lactic acid to make it possible to continue glycolysis and the production of ATP.

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Which of the following adaptations found in animals in deciduous forests protects against predators? a. Fat storage b. Migration c. Hibernation d. Camouflage.

Answers

Answer:

D

Explanation:

Answer:

d i just took the test

Explanation:

Do Grocery stores sell toothpaste cost?

Answers

Answer:

Yes they do sell toothpaste in grocery store because toothpaste is a essential thing we use in our daily life. The cost may vary from shop to shop. So we can not tell the cost of the toothpaste accurately.

Explanation:

Answer:

english please that made no sense but yes i do believe that stores sell toothpaste

Explanation:

in pea plants, green pods (G) are dominant and yellow pods (g) are recessive. If a plant has green pods, which two allele combinations could it have?

Answers

Answer:

The two combinations are Gg and GG.

Explanation:

In light dependent reactions the most important factor is ??

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[tex] \: \: \: \: \: [/tex]

the energy storage molecule ATP and the reduced electron carrier NADPH.

The light-dependent reactions use light energy to make two molecules.In plants, the light reactions take place in the thylakoid membranes of organelles called chloroplasts

hope it helps

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which molecules bind regulatory sequences of dna to encourage positive regulation of transcription?

Answers

proteins, but specifically activator proteins :)

What is the term used to describe homologous chromosomes exchanging genetic material during meiosis?.

Answers

The term used to describe homologous chromosomes exchanging genetic material during meiosis is called crossing over.

CROSSING OVER:

Crossing over is the process whereby non-sister chromatids of homologous chromosomes (similar but non-identical chromosomes from each parent) exchange genetic material.

Crossing over occurs in the prophase I stage of meiosis where homologous chromosomes lie side by side to form a structure called tetrad or bivalent.

Crossing over ensures genetic diversity in the offsprings produced meiosis.

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Answer:

crossing-over

Explanation:

What is an ecological pyramid with explanation

Answers

Answer:

Explanation of Ecological pyramid :-

A graphical representation in the shape of a pyramid to show the feeding relationship of groups of organisms, and the flow of energy or biomass through the different trophic levels in a given ecosystem.

Examples of Ecological pyramid :-

The productivity pyramid is also called the energy pyramid. Sun is the primary source of energy. Fungi and bacteria are decomposers which can procure nutrient from any trophic level by breaking down dead and decaying organisms. These nutrients return to the soil and ate taken up by plants.3 Major Types of Ecological Pyramids :-

| Pyramid of Number, Biomass and EnergyPyramid of Number: It depicts the number of individual organisms at different trophic levels of food chain. Pyramid of Biomass .Pyramid of Energy.

Explanation:

Hope this helps you XD ✌️Carry on learning !!

b19 , b20



help!!



need answer



pls also check my other questions!

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Help what is the question

homeostasis in unicellular organisms depends on the proper functioning of....?

Answers

Answer:

organelles

Explanation:

Breathing is also known as which of the following?

*Ventilation
Internal respiration
External respiration
Gas exchange

Answers

Answer:

a. Ventilation

Explanation: post protected

How does sweating during exercise help maintain homeostasis?
a) It regulates body temperature
b) It regulates water concentration in the cells
c) It regulates transport between cells.
d) It regulates ion concentrations in the cells.

Answers

Answer:

the answer would be A, It regulates body temperature

Answer:

It regulates body temperature

Explanation:

Because homeostasis is the bodies ability to maintain a set temperature.

Match each part of the kidney with the correct label.

Answers

Kidneys are externally surrounded by a three-layer capsule, and internally composed of the cortex, medulla, and pelvis. In the image, 1) Cortex, 2) Medulla, 3) Sinuses , 4) Capsule.

What are the kidneys?

The kidneys are bean-shaped, bilateral urinary organs located at each side of the vertebral column, under the ribs, and behind the abdomen (superior right and left abdominal quadrants).

Their main function is to filtrate blood, eliminate wastes and water excess through urine, and keep internal homeostasis.

When blood enters the kidneys, water, salts, and other waste substances are eliminated as urine, and the filtrated blood returns to the organism.

Kidneys are composed of different parts.

Externally,

Renal fascia ⇒ External layerRenal fatty capsule ⇒ Media layerRenal fibrous capsule ⇒ Internal layer

Internally,

the renal cortex ⇒ produces erythropoietinrenal medulla ⇒ contains nephrons, which filtrate blood and produce urine.renal pelvis ⇒ ilion

The medulla is arranged as pyramidal masses composed of tubular structures. In between the pyramids, there are renal papilla and calyces.

1) Cortex

2) Medulla

3) Sinuses

4) Capsule

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