( Need ASAP!!) Which of the following statements best demonstrates that gene expression is regulated?
F. Cells protect their DNA by enveloping it in a nucleus.
G. Cells do not transcribe all of their genes all of the time.
H. Each cell has an exact copy of all DNA.
3. Each tRNA has a specific amino acid that it carries.
Answer:
Explanation:
hi
Regulation of gene expression involves process by which a cell determines which genes, among the numerous genes in its genetic make-up, are "switched on" (expressed).
The option that demonstrate that gene expression is regulated is that Cells do not transcribe all of their genes all of the time.
In eukaryotes, regulation of gene expression can take place at various points. This might include post transcriptional and post-translational modifications. This mechanism ensures to control some various processes which include:
When a gene is expressed to produce RNA and protein,Amount of the protein is produced, And when the protein is no longer required.Learn more about gene expression: https://brainly.com/question/25703686
Why is retinoblastoma more common in individuals who have inherited the RB deletion and have the genetic predisposition for retinoblastoma?
Answer:
Retinoblastoma is more common in people due to the mutation of RB gene in them.
Explanation:
Retinoblastoma is a disease that affects the eyes of an individual. It is more commonly eye cancer which occurs on the retina of the eye. Retinoblastoma mainly affects younger children.
When the RB gene is mutated or it is deleted already on any one of a homologous chromosomes, then only one hit rather that two which is needed to cause the development of retinoblastoma and hence the probability is of retinoblastoma to occur is higher in the individuals who have already inherited the RB deletion and also have a genetic predisposition for the retinoblastoma.
Which of the answers is correct about atoms?
Answer:
A. at the center of the atoms are the electrons
Explanation:
An atom itself is made up of three tiny kinds of particles called subatomic particles: protons, neutrons, and electrons. The protons and the neutrons make up the center of the atom called the nucleus and the electrons fly around above the nucleus in a small cloud.
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Which of the following is the best example of metabolism?
Question 1 options:
Otters need to take in more calories than similarly sized land mammals in order to generate enough body heat to combat cold waters.
A fertilized egg develops into specialized tissues as an adult.
A bacterial cell divides into 2 new identical cells.
Your kidneys filter extra water out of your bloodstream to lower blood pressure.
options: 1 is right for metabolism that Otters need to take in more calories than similarly sized land mammals in order to generate enough body heat to combat cold waters.
Metabolism is the process by which of your body converts what you eat and drink into the form of energy. During this complex process, the calories in food and beverages are combined with oxygen to release the energy that your body needs to be function. The chemical changes that take place in a cell or an in the organism. These changes make energy and the materials cells and the organisms need to grow, they reproduce, and stay healthy. Metabolism also helps you get rid of the toxic substances.
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The DNA found in most bacterial cells
Answer:
bacterial chromosome
Earth Science: Q14. Explain the principles of the plate tectonics theory.
Answer: Plate tectonics is the theory that Earth's outer shell is divided into several plates that glide over the mantle, the rocky inner layer above the core. The plates act like a hard and rigid shell compared to Earth's mantle. The key principle of plate tectonics is that the lithosphere exists as separate and distinct tectonic plates, which float on the fluid-like (visco-elastic solid) asthenosphere. The relative fluidity of the asthenosphere allows the tectonic plates to undergo motion in different directions.
Explanation:
explain why it is important to keep the levels of nucleotides relatively balanced in the context of dna and rna synthesis
Answer:
Read Below
Explanation:
Nucleotides are A & T and G&C you see in DNA and in RNA T is Replaced by U. The reason they must be balanced between G&C and T&A is because G has to bond with A in DNA and G with C so if there is more G than C that means there is mismatches between the DNA nucleotides same thing for A and T. In RNA you follow the same rule. If we have lets say 27% of our DNA as A we have to have 27% as T leaving 23% as C and 23% as G. If there was lets say 29% T while one 27% A then there was a error in DNA replication and could lead to errors in RNA synthesis if not corrected
dont answer if you ont know it
The more bonds an atom can make, the more likely it is to combine with other atoms in different ways.
Which element is most likely able to make the greatest variety of bonds?
nitrogen
hydrogen
oxygen
carbon
Answer:
hydrogen
Explanation:
this is because hydrogen has a valency of 1 and has only one electron in it's outer most energy level thus able to bond with many elements easily
1. What is the relationship between the virus structure and its function in the virus model?
2. How do mutations affect the ability of a virus to infect a cell?
Answer:
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Explanation:
ANSWER OF 1ST QUESTION -
1) it protects the nucleic acid from digestion by enzymes, 2) contains special sites on its surface that allow the virion to attach to a host cell, and 3) provides proteins that enable the virion to penetrate the host cell membrane and, in some cases, to inject the infectious nucleic .
ANSWER OF 2ND QUESTION -
Mutations can produce viruses with a reduced pathogenicity, altered host range, or altered target cell specificity but with intact antigenicity. Such viruses can sometimes be used as vaccine strains.
In an organism, the brain directs the body how to respond to stimuli from the environment. In a cell, this function is performed by the?
Answer:
the nucleus
Explanation:
Why is knowing information about embryo development important?
Answer:
It helps you understand how life forms and what it takes for life to develop as well as the changes through this life cycle
Explanation:
Knowing information about embryo development is important because it helps us to understand how an organism grows and develops from a single cell into a complex being.
Why knowledge about embryo development important?An embryo is the stage of development that follows fertilization and begins when the zygote, a single cell formed by the union of a sperm and egg, begins to divide and differentiate into the various cell types that will make up the organism.
This knowledge can be used in various fields, such as reproductive medicine, to help improve fertility treatments and increase the chances of successful pregnancies. It can also be used in fields such as genetics and evolutionary biology to understand how traits are inherited and how species have evolved over time. Understanding embryo development can also provide insights into the causes of birth defects and developmental disorders, and help researchers develop treatments or interventions to improve the health and well-being of individuals.
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Select statements true of fracture zones.
Select statements true of fracture zones. Choose one or more:
A. Earthquakes can occur along fracture zones.
B. Fracture zones are situated perpendicular to mid-ocean ridge segments. C. New crust is formed via seafloor spreading along fracture zones.
D. Fracture zones can act as transform boundaries between two actively spreading ridge segments.
Fracture zones are situated perpendicular to mid-ocean ridge segments.
What are fracture zones?Fracture zones are a consequence of plate tectonics, they are an oceanic feature that is linear and sometimes travels thousands of kilometers due to the action of displaced mid-oceanic ridge axis segments. These zones are seismically inactive since the two fracture zones move in the same direction.
These fracture zones are important since by studying them it is possible to determine the direction and speed that their movements can have.
Therefore, we can confirm that fracture zones are situated perpendicular to mid-ocean ridge segments.
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What is the minimum internal temperature for holding hot food to
prevent harmful food borne pathogens from multiplying?
bones help us to move or bend our body .. True or false ... i will mark you brainliest.
Answer:
No, bones by themselves can not move, they are moved my muscles.
A ball moves in a circle at the end of a string, as shown.
An illustration of a circle with an arrowhead on the circle pointing clockwise. A black dot on the top left part of the circle is a dot with 4 vectors from it. Vector Z away from the center of the circle, vector Y toward the center of the circle, a vector tangent to the circle and clockwise labeled W and a vector labeled X along the circle and in the clockwise direction.
Which arrow represents the centripetal force responsible for this motion?
W
X
Y
Z
Answer:
The Answer is Y
Explanation:
Y is the arrow pointing towards the center of the circle and the centripetal force always goes toward the center of the circle.
The arrow that represents the centripetal force responsible for this motion is : Arrow Y
Direction of arrow YArrow Y points towards the center of the circle which is the same direction as the centripetal force acting on body whcih follows a curved path. centripetal force moves to the center of the circle ( i.e circular path ) of the object.
Hence we can conclude that the arrow that represents the centrpetal force responsible for this motion is Y
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Why don't males with X-linked traits pass them on to their male offspring?
Answer:
The Y chromosome is the other half of the XY gene pair in the male. However, the Y chromosome doesn't contain most of the gene of the X chromosome.
A person with a Strep Throat infection begins to feel hot and feverish. This
response MOST likely helps the body fight infection by -
Answer:
Increasing the temperature of the body helps weaken/ kill the bacteria
Explanation:
It literally helps melt the bacteria / kill but is dangerous because it can denature proteins in your body if to high.
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Answer:
true
Explanation:
5×10
[tex]5 \times 10 = [/tex]
Answer:
5×10=50Explanation:
I hope l helped you. Please follow me. ❤❤❤Put the steps ol enzyme activity in order from first to last using the drop down menu beside each step.
* The chemical reaction occurs.
A substrate enters the active site of
enzyme.
New substances called "products" are formed.
- The enzyme and the substrate bind to form the enzyme-substrate complex.
The steps of enzyme activity in order is:
A substrate enters the active site of enzyme.The enzyme and the substrate bind to form the enzyme substrate complex.The chemical reaction occurs.New substance called product is formed.What is enzyme substrate complex?
When an enzyme binds to its substrate, an enzyme-substrate complex is formed. The activation energy of the reaction is reduced, and the reaction proceeds more rapidly thanks to the complex's provision of certain ions or chemical groups that actually form covalent bonds with molecules at a vital point of the reaction process.
A non-covalent structure where the active site of an enzyme is connected to a substrate. Supplement. The complex of the enzyme and substrate is produced during a chemical process.
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Areas of the Earth near the equator receive large amounts of solar energy. How does this lead to increased rainfall?
A.
The solar energy creates wind, which pushes clouds from the poles to the equator.
B.
The solar energy allows plants to complete photosynthesis reactions.
C.
The solar energy heats the air, which causes water vapor to condense.
D.
The solar energy provides the energy for water to evaporate.
Answer:
D
Explanation:
The heat will make water evaporate at a higher rate thus causing more rain
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How do environmental factors and heredity affect personal health?
Thanks
Answer:
Heredity: all the traits and properties that are passed along biologically from both parents to child. To some degree this determines your general level of health. You inherit physical traits such as the color of your hair and eyes, shape of your nose and ears, as well as your body type and size.
Explanation:
Brainliest please?
Answer:
A clean-living environment can help decrease the risk of developing illness and disease affecting personal health. Heredity are traits and properties that are passed along biologically from both parents to a child. These traits can be good or bad like diseases and linesses.
please help me
is the my daughter
Answer: I think it’s D,C, and A.
Explanation:
earth retains water because
How do naturally occurring hormones affect plants?
Answer:
The answer is C :)
Explanation:
What spheres of the Earth will be affected by the volcanic eruption and how does it affects? Make 3 sentences.
Please help! I’ll mark brainliest
Answer:
heterozygous
Explanation:
i might be wrong
Answer: Cannot tell- Not enough information provided
Explanation: We know for certain the son is NOT ww because the son has the dominant trait for the widow's peak. Both the parents are Ww because their daughter lacks a widow's peak, which means they both must carry the recessive gene. If we conduct a Punnett Square with the parents genotypes which are both Ww, the son has a 25% chance to be WW, and a 50% to be Ww and a 25% chance to be ww (which he is not since he has a widow peak!). The son could be WW or Ww. In order to find out which genotype the son has, we'd have to look as his offspring!
I hope this helps!!
what is the key factor in determining the habitable zone of a planet
Answer:
The key factor in determining the habitable zone of a planet is looking for a Earth-like planet that is able to have water on it's surface, and make sure that it can still give or support life.
Hope this helps!
Answer:
Ability of water to be liquid.
Explanation:
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Which of the following organelles would not be present in the nerve cell of the humpback whale?
A. Plasma membrane
B. Cell wall
C. Mitochondria
D. Lysosome
Answer: b
Explanation:
What is included in growth rate factors
Answer:
Population growth is based on four fundamental factors: birth rate, death rate, immigration, and emigration.
Explanation:
GG.