Why are some genes expressed (turned on) and some genes not expressed (turned off) in a cell?

Answers

Answer 1

Answer:

some genes can funtion on their own

Explanation:


Related Questions

help me plz i’ll give extra points

Answers

Answer: see below

Explanation:

So, kinetic energy means an object is already in motion. Potential energy, means an object has the potential to transfer energy but is idle. Mechanical energy is something like a wheel turning. That is also correlated with kinetic energy. Which in turn, means when a wheel rotates, the object is in motion. Therefore transferring energy.

Which of the following is not directly involved in protein synthesis?
tRNA
mRNA
Ribosomes
Mitochondria

Answers

The right answer is Mitochondria.

Select all that describe features of prokaryotes.
A. Prokaryotes don't have a nucleus
B. Prokaryotes absorb nutrients directly from the water they live in
C. The cells are surrounded by a cell membrane
D. Prokaryote Organelles are free within the cell
E. Prokaryotes are multicellular organisms

Answers

Answer:

A. Prokaryotes don't have a nucleus

D. Prokaryote Organelles are free within the cell

Explanation:

Answer:

A

D

B

Explanation:

Hope this helps

:)

The data table shows the percentage of amino acid
similarities found in a protein for several organisms
when compared to the same protein in rabbits.
Based on the data,which organism is most closely related to the rabbit?
a.hamster
b.pig
c.dog
d.cat

Answers

Based on the data, the organism that is most closely related to the rabbit is: b. Pig.

Which organism has the most similarity?

According to the diagram, the organism that has the most closely related similarity to the rabbit is the pig. The pig bears 95.4% of amino acid similarity to the Rabbit. This is almost 100 percent similarity, so we can say that this animal bears the most resemblance to a rabbit.

Amino acids are base materials that are necessary for the formation of nucleotides and genetic materials so the similarity goes down to genetics.

Learn more about amino acids here:

https://brainly.com/question/14351754

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Which of the following statement is not true?
a. Exposure to electromagnetic fields is known to cause leukemia.
b. Excessive exposure to asbestos can lead to asbestosis.
c.Excessive exposure to radiations can cause health problems including cancer. d. Any sound above 80 dB is potentially dangerous.​

Answers

it’s b sorry if i’m wrong
b. excessive exposure to asbestos can lead to asbestosis

In what part of the cell does fermentation occur?

Answers

Answer:

cytoplasm

Explanation:

As with glycolysis, fermentation takes place in the cytoplasm of the cell. There are two different forms of fermentation—lactic acid fermentation and alcoholic fermentation.

The Documentary, “Before the Flood,” was very informative. It was about

Answers

it was about a discussion of the dangers of climate change and it's possible solutions (:

A male and female Oompah have the same genotypes: blue face (ff) and big feet (Ll). Determine what they’re offspring may look like!

Answers

Answer:

They Will have Blue Face and Large feet

Explanation:

for the blue face you will get 100% Blue face

for the large feet you will 75% Large feet and 25% small feet


Sacculina carcini is a barnacle that attaches to the underside of the green crab. The barnacle finds a hole in the
green crab's exoskeleton, then uses microscopic hairs to feed on nutrients from the green crab's blood. The barnacle also lays its eggs in the green crab reproductive system, which sterilizes the green crab.
Which term describes the role of S. carcini in this relationship?
a.prey
b.host
c.parasite
d.predator
pls help!!

Answers

Answer:

c. parasite

Explanation:

the barnacle benefits from the host while the host is harmed from the barnacle

Answer:

c the parasite <3

Explanation:

A geneticist is studying two traits in corn: kernel color and kernel appearance or ‘shine'. The R/r alleles determine kernel color (R – purple color; r – yellow color). The W/w alleles determine kernel ‘shine' (W – waxy; w – dull). The geneticist crosses two corn plants that are Rr Ww and Rr ww . What phenotypic ratio is expected from these two parents?

Answers

Answer:

Purple, waxy (R_W_) = 6

Purple, dull (R_ww) = 6

Yellow, waxy (rrW_) = 2

Yellow, dull (rrww) = 2

Phenotypic ratio = 3 (purple, waxy) :3 (purple dull) :1 (yellow waxy) :1 (yellow dull)

Explanation:

This question involves two genes coding for kernel color and kernel appearance or ‘shine in corn plants. The alleles for purple kernel (R) and kernel waxy (W) are dominant over the alleles of yellow color (r) and kernel dull (w).

According to this question, a geneticist cross two corn plants that have the genotype: RrWw and Rrww. The following gametes will be produced by each parent:

RrWw - RW, Rw, rW, and rw

Rrww - Rw, Rw, rw, and rw

Using these gametes in a punnet square (see attached image), the following proportion of offsprings will be produced:

Purple, waxy (R_W_) = 6

Purple, dull (R_ww) = 6

Yellow, waxy (rrW_) = 2

Yellow, dull (rrww) = 2

The phenotypic ratio expected from crossing these two parents is 3 (purple, waxy) :3 (purple dull) :1 (yellow waxy) :1 (yellow dull).

Please I need help with my homework I have to turn it in tomorrow morning

Answers

Answer:

Some factors that may cause a decrease in population size:

- a high mortality rate due to an infectious disease

- a low birth rate

- a high mortality rate due to interspecific competence  

- a high emigration rate

Explanation:

In biology, population size (N) refers to the total number of individuals in a given population. The four main factors that affect population size are birthrate (natality), death rate, immigration rate (i.e., the number of individuals of a given species that move into a population), and emigration rate (i.e., the number of individuals of a given species that move out of a population). Both birthrate and immigration are known to increase N, while death rate and emigration are rates known to decrease this value.

Cystic Fibrosis is an autosomal recessive disease. A carrier male is married to a carrier female. What is the chance they will have a child with cystic fibrosis?

0 percent
25 percent
50 percent
75 percent
100 percent

Answers

Answer:

25 percent

Explanation:

25 percent 25 percent

Dropdown
Choose the option that best matches the description given.

Selena was racing her quarter-horse against Jolene, who was also her rival for Sean's affections. Jolene was starting to overtake Selena. Trying to slow down the competition, Selena waved her riding crop in the air, intending to just tap Jolene on the shoulder. Instead, the strap lashed across Jolene's face, causing a huge welt.
battery
intentional infliction
assault

Answers

intentional infliction?

My grades CLOSE tomorrow helpppppp

What can affect the death rate of mouse population and explain why

Answers

Something that could affect the death rate of mouse population is the over population of a predator let’s say in an area you have a population of snakes and mice if there are more snakes in that area than mice then they can’t populate quickly enough causing the death rate of the mice to increase. Hope this helps

The death rate of the mouse population is significantly affected by the overpopulation of its predators like cats, owls, snakes, etc.

What do you mean by Population?

The Population may be defined as a group of individuals belonging to the same species living in the same area at a given time period of time.

According to the context of this question, if the number of predators of the mouse population is higher than that of the mouse, the death rate is generally found to be higher.

While if the population of the predator is low, as compared to the mouse, then the death rate is probably less. Other factors like space, food, mating partners, etc. may also describe the death rate of any species.

Therefore, the death rate of the mouse population is significantly affected by the overpopulation of its predators like cats, owls, snakes, etc.

To learn more about Predators, refer to the link:

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What are constellations?

Answers

Explanation:

okay okay gracias por tus puntos

Answer:

picture made by stars

Explanation:

A visible group of stars forming an outline and/or pattern

Scientist have inferred the structure of Earth's interior mainly by analyzing

A. The Moon's Interior
B. The Moon's Composition
C. Earth's Surface Features
D. Earth's Seismic Data

Answers

Answer:

Earth's seismic data

Explanation:

It would be D Earths seismic data

A segment of DNA has the following nitrogen base sequence: ACT TCG.

(Please answer both)

A.What base sequence would appear on the complementary strand?

B.Using the above nitrogen base sequence, give a possible sequence showing that an error has occurred in the second base.​

Answers

Answer:

B is the correct answer

Explanation:

using th above nitrogen base........

Explanation:

adenine (A), thymine (T), guanine (G) and cytosine (C). These nucleotides come together to form long chains known as DNA strands. Two complementary DNA strands bond to each other in what looks like a ladder before winding into the double helix form.

Can someone please help with this and explain! I will mark brainliest!!!

Answers

Answer:

D       Flow of protons across an electrochemical gradient

Explanation:

The chloroplast adenosine triphosphate (ATP) synthase uses the electrochemical proton gradient generated by photosynthesis to produce ATP, the energy currency of all cells. Protons conducted through the membrane-embedded Fo motor drive ATP synthesis in the F1 head by rotary catalysis.

In chloroplasts, photosynthetic electron transport generates a proton gradient across the thylakoid membrane which then drives ATP synthesis via ATP synthase.

The light-induced electron transfer in photosynthesis drives protons into the thylakoid lumen. The excess protons flow out of the lumen through ATP synthase to generate ATP in the stroma.

Majority of ATP is produced by OXIDATION PHOSPHORYLATION. The generation of ATP by oxidation phosphorylation differs from the way ATP is produced during glycolysis.

Electrons are passed from one member of the transport chain to another in a series of redox reactions. Energy released in these reactions is captured as a proton gradient, which is then used to make ATP in a process called chemiosmosis.

D.Flow of protons across an electrochemical gradient

is the correct answer

A researcher found that the wild species of almond trees contains a chemical called amygdalin.
This chemical is converted into cyanide inside the human body and can be lethal. The researcher
found that a single gene mutation in some of the wild almond trees resulted in a variety that no
longer produced the chemical amygdalin. This variety of almond is largely harvested for human
consumption. Based on the study, the researcher claimed that some mutations are beneficial in
nature. Was the claim made by the researcher correct? Why or why not?
a) Yes. The mutated variety of almond was edible.
b) No. Not all almond trees produced seeds that were edible.
c) No. The mutation did not affect all varieties of almond trees.
d) Yes. Almond trees with amygdalin grew only in forests.

Answers

Answer:

a) Yes. The mutated variety of almond was edible.

Explanation:

Yes, the claim made by the researcher is considered correct because the mutation removes the amygdalin chemical from the almond so these almonds are now safe for eating. This removal only occur through mutation. Mutation is the sudden change occur in the DNA of cell that leads to different functions occur in the body so we can say that some mutation that is occur in organisms are beneficial.

Why do you think having many different species is important to humans?

Please write a creative answer! ;v;

Answers

Answer:

.

Explanation:

Biodiversity is important to humans for many reasons. ... Ecological life support— biodiversity provides functioning ecosystems that supply oxygen, clean air and water, pollination of plants, pest control, wastewater treatment and many ecosystem services

PLEASE HELP! - Describe why carbon, hydrogen, oxygen, nitrogen, & other elements can combine. Describe the results of these combinations.

Answers

Answer:

Carbon, Oxygen, Hydrogen And Nitrogen - Have In Common? They All Have The Same Number Of Valence Electrons. They All Have Unpaired Electrons In Their Valence Shells. They Are Elements Produced Only In Living Cells.

Whoever answers I will mark brainlest

Answers

Answer:

Anaphase and Prophase

Explanation:

2 points
It's February, you're excited because it finally snowed enough to miss
school. You go outside with just jeans and a t-shirt on. Provide two
examples that tell me how your body responds to this environment so you
can maintain Homeostasis.
Your answer

Answers

Answer:

jayfeather loved halfmoon but it was forbiden

Explanation:

What does the prefix trop mean?

Answers

Answer:

To turn/ react

Explanation:

What colour does the iodine go when placed on a leaf that does not contain starch

Answers

Answer:

It goes blue/black if starch isn't present.

Explanation:

In the presence of starch, iodine turns to a blue/black colour. When starch is absent, iodine solution remains yellow/brown.

A difference between DNA and RNA is that:

1.DNA has different bases than RNA


2.DNA is in the nucleus and RNA is never in the nucleus

3.DNA is a single strand and RNA is a double strand

4. DNA makes the proteins and RNA is the instructions

Answers

I believe the correct answer is A) DNA has different bases than RNA.

DNA consists of the bases guanine, cytosine, adenine, and thymine. RNA consists of the bases guanine, cytosine, adenine, and uracil.

Which statement is most accurate regarding the energy in the process of photosynthesis?

Light energy does not need to be present for photosynthesis to occur.

Light energy is completely lost during the photosynthesis reaction.

More energy is created than what was present initially.

Light energy is converted into chemical energy in photosynthesis.

Answers

Answer:
D) Light energy is converted into chemical energy in photosynthesis

Answer:

D) Light energy is converted into chemical energy in photosynthesis

Explanation:

Hope this helps

A producer gets energy from _______ and converts it into food. a.Primary consumers b.The sun c.Nonliving organic matter d.Secondary consumers

Answers

The answer is going to be B. The sun


In the deep ocean layer, the temperature and salinity of the water is

options to anwser
the same
continues to decrease rapidly

Answers

Answer:

Option 2:- continues to decrease rapidly

Which is an example of carbon accumulating in the geosphere?

Select one:


Formation of fossil fuels from remains of dead organisms.


Breaking down the body of a dead organism and producing carbon dioxide gas.


Formation of glucose in plants through photosynthesis.


Breaking down glucose in cells through cellular respiration.


HELP NEEDED!! :(

Answers

Answer:

your answer is a

Explanation:

Carbon enters the geosphere through the biosphere when dead organic matter (such as peat or marine algae) becomes incorporated into fossil fuels like coal and organic-matter-rich oil and gas source rocks, and when shells of calcium carbonate become limestone through the process of sedimentation briefly described above. formation of fossil fuels form remains of dead organisms .

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