AP BIOLOGY

Detailed explanation-1: -DNA is found mostly in the cell nucleus, but another type of nucleic acid, RNA, is common in the cytoplasm. Watson and Crick proposed that RNA must copy the DNA message in the nucleus and carry it out to the cytoplasm, where proteins are synthesized.

Detailed explanation-2: -mRNA is made in the nucleus, with each mRNA fragment copied from its relative piece of DNA, before leaving the nucleus and entering the cytoplasm.

Detailed explanation-3: -The mRNA is found along with the DNA molecule as it is a complementary transcribed version of DNA. The mRNA gets translated into proteins and enzymes required for cell functioning. Both DNA and RNA are present inside the double membrane-bound organelle called the nucleus of the cell.

Detailed explanation-4: -Ribosomal RNA (rRNA) is the most common form of RNA found in cells – it makes up around 50% of the structure of the ribosomes. It is produced in the nucleus, before moving out into the cytoplasm to bind with proteins and form a ribosome. Transfer RNA (tRNA) is found in the cytoplasm and has a complex shape.

Detailed explanation-5: -The nucleus houses the genetic material of the cell: DNA. DNA is normally found as a loosely contained structure called chromatin within the nucleus, where it is wound up and associated with a variety of histone proteins. When a cell is about to divide, the chromatin coils tightly and condenses to form chromosomes.