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Hello,Sir i am again ask you some question. My questions are

1.mRNA is complementary sense strand to DNA-Briefly described?

2.Three difference between Simple microscope & compound microscope?

3.Adenine always pair with Thymine -why?

Thanks in advance.

Hi Shuvo
 1. mRNA is the code necessary for protein synthesis. DNA acts as a template for the formation of mRNA
 2.A simple microscope has a single lens while a compound scope has  three or more
 3. It has to do with the attachment cite Only thymine can bond to adenine. The same is true with respect to Guanine and cytosine


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Walter Hintz


Science teacher for over 50 years. MSc. in biology. I can answer questions in general biology, zoology, botany, anatomy and physiology and biochemistry.


I have a MSc in biology and have been a science teacher for over 50 years. At present I am a faculty member at a college and a science consultant at seven catholic schools.

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