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forsale [732]
3 years ago
13

What is a central nervous system?

Biology
2 answers:
Luba_88 [7]3 years ago
8 0
<span>the complex of nerve tissues that controls the activities of the body. In vertebrates it comprises the brain and spinal cord</span>
larisa [96]3 years ago
5 0
A central nervous system is a complex of nerve tissues that controls the activity of the body. It deals with the brain and spinal cord.
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In addition to splicing, additional modifications at the 5' and 3' end are required to generate a mature mRNA. What is the signi
Archy [21]

Answer:tailing at 3' end protects mRNA from attack by 3' exonuclease and 5' capping is useful for recognition of mRNA

Explanation:

The mRNA formed and released from the DNA template is known as primary transcript. In mammalian system, it undergoes intensive modification to become the mature mRNA.

Post transcription processing includes removal of Introns, splicing of exons, poly-A tailing at 3'end and capping at 5' end.

The Poly-A tailing at 3' end occurs in the nucleoplasm, the 3' end is polyadenlated involves with 20-250 nucleotides long. This tail protects mRNA from attack by 3' exonuclease activity

5' end capping end also is done in the nucleus. The cap is useful in recognition of mRNA by the translating machinery.

7 0
3 years ago
Your friend Jorge is not home when you drop by to see him. You find the following note that someone else left on his door. Based
antoniya [11.8K]

Based on the note, Jorge is at the beach, because playa means beach in Spanish.

<h3>What is playa?</h3>

Playa refers to a flat plane area.

In the note, playa is written, which means beach in Spanish.

So, from the note, we can assume, that Jorge went to the beach.

Thus, Jorge is at the beach.

Learn more about beach

brainly.com/question/15524787

6 0
2 years ago
Which important biochemical process receives a supply of NAD+ ions from the fermentation process during anaerobic respiration?
sammy [17]

Answer:

Glycolysis.

Explanation:

Glycolysis is a universal process that provides energy in the form of ATP molecules. It requires two molecules of NAD+, which are reduced to NADH during glycolysis. Thus, regeneration of NAD+ is necessary as if NAD+ is absent, glycolysis cannot be able to continue.

During anaerobic respiration (respiration in the absence of oxygen), fermentation takes place to regenerate NAD+ used in the process of glycolysis.  

6 0
3 years ago
Read 2 more answers
Which of the following best describes how a cell’s DNA can change through mutations?
sladkih [1.3K]
The right answer would be D.

6 0
4 years ago
Read 2 more answers
A thick, brownish haze that forms when gases in the air react with sunlight
mr Goodwill [35]
I think the answer is photochemical smog.

Hope this helped!
8 0
3 years ago
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