Questions

Because arteries have to have thick walls for use of protection. Its when you get to veins where the walls get thinner. And the use of the heart is to pump blood to all of the cells and organs in the body so it would be to transport blood away from the heart.

i.e. 

Arteries = Away from the Heart 
Veins = Back to the Heart.

Six sigma is a data-driven technique and way for eliminating defects in any progress from product to service and from manufacturing to transactional.

A Secret is what you want to share if you have with you. And if you share that secret with anyone, then secret will not be with you only.

The time taken for the earth and the solar system to complete one journey round the Milky Way.

Translation occurs in the cytoplasm whereas transcription occurs in the nucleus.

Transcription and Translation:

Terms transcription and translation in biology are generally related to the DNA and its properties. Human cells replicate. In order to do that, they have to produce the same constituents for the new cell that is to be made. The only way to do that is by producing proteins.

The proteins are produced in the process that is called protein synthesis. The first step is in the nucleus where a particular gene is being expressed so it enables all protein factors to come and to replicate that part of a chromosome. This is finished when mRNA, the same single-stranded genetic code of a particular gene, is formed. This is transcription.

Right after that, the mRNA enters the cytoplasm through nuclear pores. There, it could be translated into proteins by ribosomes. This process is called translation.

Kolkata Metro Rail is the first metro rail operating since 1984 in India.