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marshall27 [118]
4 years ago
12

A geneticist isolates a gene for a specific trait under study She also isolates the corresponding mRNA Upon comparison, the mRNA

is found to contain 1,000 fewer bases than the DNA sequence. Did the geneticist isolate the wrong DNA? A) yes, mRNA is made from a DNA template and should be the same length as the gene sequence B) yes, the mRNA should contain more bases than the DNA sequence because bases flanking the gene are also C) no, the final mRNA contains only exons, the introns were D) no, the mRNA was partially degraded after it was removed
Biology
1 answer:
olga nikolaevna [1]4 years ago
5 0

Answer:

C) no, the final mRNA contains only exons, the introns were removed

Explanation:

Exons are the coding areas while the introns are non-coding areas. Both of these are the sequences of nucleotide within a gene.

RNA splicing is a process which usually occurs as the RNA matures, causing the removal of introns ( non coding areas of the RNA ) i-e they will not be expressed in the final messenger RNA, while exons continue to form covalent bonds with one another to form a  mature mRNA.

So in the given scenario, Upon comparison, the mRNA is found to contain 1,000 fewer bases than the DNA sequence because the introns were removed by RNA splicing.

Hence option C) no, the final mRNA contains only exons, the introns were removed is correct.

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Proteins destined for the following locations are sorted in the trans-Golgi:
taurus [48]

Answer:

A

Explanation:

Golgi apparatus is an organelle in eukaryotic cells that stores and modifies (might include addition of sugar groups) proteins and lipids for certain functions and prepare them for transport to other parts of the cell.

In the Endoplasmic reticulum, proteins fold into into their correct shape. Some of them are transported to the Golgi apparatus in membrane vesicles. Some proteins need to do their jobs in the Golgi (they are said to be Golgi-resident). They are transported from the golgi appratus to their final destinations through a secretory pathway. It involves sorting proteins into different kinds of transport vesicles, which emanate from the trans Golgi network and deliver their contents to the appropriate cellular locations.

Proteins that are membrane embedded are conveyed to the plasma membrane (integral membrane proteins) by constitutive secretion. Proteins can divert from constitutive secretion pathway and be targeted towards other destinations such as lysosomes (as lysosomal proteins) and regulated secretion from cells (to the cell exterior).

8 0
4 years ago
How might adding trees, other plants, and phytoplankton to the biosphere impact global climate change?
astraxan [27]

Answer:

B) The biosphere will absorb carbon dioxide, and the temperature of the atmosphere may decrease or the warming of the atmosphere will slow.

Explanation:

The Climate is constantly influenced by changes caused by the increase in global temperature called Global Warming. Global warming is caused by the emission of green house gases which includes carbondioxide (CO2). Hence, one way to prevent the climate from further deterioration is to find a way of removing gases like CO2 from the atmosphere.

Plants like trees and phytoplanktons like algae are photosynthetic organisms. This means they have the ability to perform the process of photosynthesis, which is the usage of light energy from sun to synthesize food in form of organic molecules (glucose) from an inorganic source. The inorganic source is Carbondioxide (CO2). Plants take in CO2 via the stomata on their leaves. Carbondioxide is a vital raw material for photosynthesis, hence, the photosynthetic process helps remove Carbondioxide from the atmosphere.

If trees, other plants, and phytoplankton are added to the biosphere, they will perform photosynthesis and absorb a good amount of Carbondioxide (CO2), which contributes to global warming, from the atmosphere. Hence, the temperature or warming of the atmosphere caused by global warming will decrease.

4 0
3 years ago
You are the director of the Soil and Water District Management Team. Recently, tests have shown a decrease in crop yield as well
Dmitrij [34]

Answer:

Best three management practices would be: Stream side Buffers, Cover Crops, Nutrient Management Plans.

Explanation:

  • Conservation and management practices must be taught to every farmers for the deduction of chemical effect and nutrition erosion activities.
  • Areas bordering stream banks that are taken out of crop production or pasture use and planted with native trees, shrubs, or grasses, helps in managing the decrease in soil fertility and an increase in  chemical runoff into the waterways. This technique is called as the stream side buffers.
  • To reduce runoff and erosion and enrich the soil with organic matter, cover crops must be planted. These crops soaks all the excess chemical fertilizers left on the field.
7 0
3 years ago
The images show the wings of a bat and a bee. From this evidence, what can you conclude about the evolutionary relationship betw
oee [108]

i definitely different  

7 0
3 years ago
Read 2 more answers
Although most thunderstorm cells complete their life cycle in 30 minutes, thunderstorm weather may persist at a specific locatio
mylen [45]
The thunderstorm is more likely to remain in the area for longer periods of time if mountains are present. The air is forced up the mountain, and the instability and moisture remain, meaning the thunderstorm persists. 

The convection currents that exist between the cold and hot air due to density differences may also remain, which means that the thunderstorm weather will also remain. 
8 0
3 years ago
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