Expressing a gene basically means manufacturing its corresponding protein. This process has two major steps:
In the transcription process, the information in DNA is transferred to a messenger RNA (mRNA) molecule. This first major step of gene expression and genetic splicing of exons occurs in nucleus environment of the cell.
During translation, which is the second major step, the mRNA is "read" according to the genetic code, which relates the DNA sequence to the amino acid sequence in proteins. Within all cells, the translation occurs within a specialized compartment called the ribosome.
The best answer for the question: The first major step of gene expression and genetic splicing of exons occurs in this specific aqueous environment of the cell:____, would be: The nucleus.
Explanation:
Unlike prokaryotes, that do not possess a nucleus in their cells, eukaryotic cells contain all their DNA material inside a much smaller unit of the cell called the nucleus. Aside from containing DNA (genetic material) the nucleus contains also an aqueous solution in which the DNA lies.
During the first step of genetic expression, which is when the DNA strain is unwinded and genetic information is translated from the DNA strain into an mRNA, the process remains secluded to the nucleus. It is during transcription (decoding the DNA and transforming genetic material into a functional protein) that the process of gene expression leaves the nucleus and happens in the cytoplasm.
<span>Cytokinesis takes place by formation of a cell plate in plant cells, and a cleavage furrow in animal cells. Cytokinesis is the process of cell division. Cell plates are found in plants and some algae. Cleavage furrows are found in animals and some algae as well.</span>
The model shows that the fetus becomes more complex during development. This is because mitosis allows the cells that make up the fetus to become specialized.
or D:
The model shows that the fetus gets larger as time goes on. This is because mitosis constantly increases the number of cells that make up the fetus.
He contributed to the discovery of cells while looking at a thin slice of cork. He then thought that cells only exist in plants and fungi. In 1665, he published Micrographia.
