The relationship between a gene and a messenger rna is as follows: a. mrnas are made from genes. b. genes are made from mrnas. c. mrnas make proteins which then code for genes. d. messenger rna is directly responsible for making okazaki fragments. e. all genes are made from mrnas.

a. mRNAs are made from genes.

Explanation:

A gene is a stretch of the DNA molecule and serves to specify the nucleotide sequence of an mRNA. Transcription is the process during which mRNA is synthesized by using the nucleotide sequence of a gene. The enzyme RNA polymerase copies the nucleotide sequence of the template DNA strand into the nucleotide sequence of mRNA. The process occurs in the nucleus in eukaryotes and the mature mRNA leaves the nucleus to enter the cytoplasm.

The mRNA joins ribosomes to synthesize proteins. The nucleotide sequence of mRNA serves as a template of the amino acid sequence of a protein. Therefore, a gene code for a protein through mRNA.

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.