Why is a cap added to mRNA, but not to tRNA or rRNA?A-Transfer RNA and rRNA exhibit complex structures with double stranded regions. The three-dimensional shapes of these molecules keep the 5\' end of the RNA away from the enzymes that process the cap.B-Transcription and processing of mRNA occur in the nucleus, where cap binding proteins are found. These proteins, which add and modify the cap, are not found in the cytoplasm, where tRNA and rRNA are transcribed and processed.C-Each of the three types of RNA are transcribed by different RNA polymerases. Only RNA polymerase II, involved in mRNA synthesis, contains a domain capable of interacting with enzymes that form the cap.D-Only mRNA contains introns. Capping occurs simultaneously with intron removal because the same enzymes and proteins involved in both of these processes must bind to RNA at the same time.
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Answer:
The correct option is C ' Each of the three types of RNA are transcribed by different RNA polymerases. Only RNA polymerase II, involved in mRNA synthesis, contains a domain capable of interacting with enzymes that form the cap.'
Explanation:
All the different type of RNA's undergo the process of transcription. However, their transcription is carried on by different types of RNA polymerases.
The transcription of the mRNA is carried by RNA polymerase II. The process of capping is essential so that the mRNA is stopped from degradation.
The rRNA is transcribed by RNA polymerase I which cannot add a cap tothe RNA.
The tRNA is transcribed by the RNA polymerase II, but the domain is different which cannot undergo the process of capping.
Related Questions
Bacteria are grown in a petri dish. One side of the dish is sprayed with an antibiotic. After a week, the number of bacteria colonies are counted on each side. What is the independent and dependent variable?
According to the lock and key model of enzymes, which of the following would be the most likely substrate?a. V b. X c. Y d. Z e. A realistic substrate is not shown in the diagram.
Sodium is an example of an alkali metal. The alkali metals are found in the leftmost column of the periodic table, known as Group 1. Use the interactive periodic table to explore the properties of the following alkali metals: lithium (Li), sodium (Na), potassium (K), rubidium (Rb), and cesium (Cs). The animations demonstrate a chemical property common to alkali metals: they react with water. How does the reactivity vary among this group of elements? Why might patterns like this be useful to scientists?
Which of the following best describes the effect of cancer-causing mutations on the cell cycle? The mutations increase the speed of the cycle. The mutations cause the cell to bypass checkpoints in the cycle The mutations eliminate one or more stages of the cycle. The mutations interfere with S stage of the cycle. None of these.
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Answer:
Global climate models usually work by managing the planet as a set of connected boxes because this facilitates the management of the calculations applied in a climate system that is dynamic, variable and complex, which is due to the fact that there is not an equal pattern of climate in each area of the planet.
Explanation:
Climate models have been designed to show the dynamics of the planet's climate and what can be expected from the changes that occur in the future.
The scientific basis of a climate model is physical phenomena and chemical reactions to which a series of differential calculations are applied to determine the behaviour of:
- Winds.
- Temperature.
- Relative humidity.
- Rainfall.
- Pressure changes.
- Heat transfer.
- Hydrological dynamics.
Global climate models usually divide the planet into sections -such as boxes- making the calculations in each sector, as well as the interaction of each section with the adjacent sections, which greatly facilitates making the differential calculations, showing the climate at a given time and making predictions of future climate behavior.
It is important to mention that a climate model also explains the changes that occur in the climate due to human activity, which is different in each region of the world.
Learn more:
Global climate modelsbrainly.com/question/9423898
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Acceleration of a body is defined as rate of chance in velocity with respect to time and its S.I. Units are / or
Magnitude of average acceleration of a body = (final speed - initial speed)/time interval =
where, final speed =v= 11 m/s; initial speed = u = 6 m/s; and time interval = t = 3 s
Hence acceleration = =
=
Answer:
The acceleration of the object is 1.667 m/s2.
Explanation:
Given data:
Initial velocity = v1 = 6 m/s
Final velocity = v2 = 11 m/s
Time period = t = 3 s
Solution:
Acceleration = a = ( v2 - v1)/t
By putting values in the above formula:
Acceleration = a = (11 - 6)/3
a = 5/3 = 1.6667
Explanation:
Acceleration of an moving object is the change of velocity of an object divided by the total time taken by the object which is time period. So by putting values it comes that acceleration of object is 1.6667 m/s2.
The unit is meter per second square.
b. the lynx reproduce at a higher rate.
c. the lynx population crashes.
d. the food source for the hares increases.
e. the lynx begin preying upon birds.
Answers
The immediate next step in the cycle is the lynx population crashes. Hence option c is correct.
What is population?
Population is defined as the entire group of people, regardless of whether they are part of a country or share a certain trait. It comprises of a related collection of species that live in a specific area and have the ability to interbreed. It is calculated by dividing the sum of all population variables by the total population of variables.
Following a delay of one to two years, the lynx population drop occurs after the snowshoe hare population crash. Lynx continue to eat well even as the quantity of hares begins to drop because they can easily catch the starving hares. Lynx populations decrease as hares become harder to find.
Thus, the immediate next step in the cycle is the lynx population crashes. Hence option c is correct.
To learn more about population, refer to the link below:
#SPJ2
C. The lynx population crashes due to their food source being gone.
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Answer:
There are two mitosis and meiosis.
Answers
Transcription occurs along a 3'-5' template forming an mRNA in the 5'-3' direction.
WHAT IS TRANSCRIPTION:
- Transcription is the process by which a mRNA molecule is synthesized from a DNA template.
- Transcription occurs in the nucleus of eukaryotic organisms where the information stored in the DNA molecule is used to produce a complementary mRNA sequence that conveys it to the ribosome.
- Transcription occurs in the 3'-5' direction, and since the mRNA molecule is complementary, it'll be in the 5'-3' direction.
Therefore, transcription occurs along a 3'-5' template forming an mRNA in the 5'-3' direction.
Learn more about transcription at: brainly.com/question/15175461
Answer:
3' to 5'; 5' to 3'
Explanation:
The DNA strand with 3' to 5' polarity serves as a template for the process of transcription. Using the 3' to 5' DNA template strand, the enzyme RNA polymerase catalyzes the formation of RNA. The ribonucleotides are bonded together by phosphodiester bonds that are formed in 5' to 3' direction only. The formation of RNA occurs in 5' to 3' direction. The DNA template strand has a complementary nucleotide sequence to the newly synthesized RNA.