Answer:
Tiny openings called stomata which is responsible for the exchange of gases between leaves and environment.
Explanation:
Stomata are present on the epidermis of the leaf. Stomata opening and closing is controlled by guard cells. When photosynthesis process starts, stomata opens and allow carbondioxide into the leaves while when photosynthesis over and oxygen is produced. Again stomata opens and release the oxygen to the atmosphere.
The mutation in the 3' end of a mammalian gene that changes the sequence AAUAAA (poly-A tail) will affect the stability of the m-RNA molecule.
Poly-A tail in mammalian gene is composed of the sequence AAUAAA. It us very essential for providing the m-RNA molecule its stability. Its presence also prevents the degradation of the RNA. Another function of poly-A tail is to guide the transport of newly synthesized RNA molecule from the nucleus to the cytoplasm for translation.
m-RNA is the messenger RNA. It is the RNA that actually encodes the genetic information from the DNA and transfers it to the protein. m-RNA when newly synthesized is called the hn-RNA and is formed into complete m-RNA only after undergoing certain processing.
To know more about m-RNA, here
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Answer:
its option 2 and 4
Explanation:
because i'm the best and i already read this :)