All cells have a nucleus in the middle of it (Hope that helps)
Answer:
2
Explanation:
Humans need proteins, fatty acids, vitamins, and minerals
Liver secretes bile which is then stored in gall bladder. Bile enters the duodenum via the bile duct. Bile emulsifies lipids, transforming large lumps of lipids into tiny droplets, which provide a larger surface area for digestion. This allow lipid digestion to proceed more rapidly. Bile contains bile acids, which are critical for digestion and absorption of fats and fat-soluble vitamins in the small intestine.Many waste products, including bilirubin, are eliminated from the body by secretion into bile and elimination in feces.
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Most genes contain the information needed to make functional molecules called proteins. (A few genes produce other molecules that help the cell assemble proteins.) The journey from gene to protein is complex and tightly controlled within each cell. It consists of two major steps: transcription and translation. Together, transcription and translation are known as gene expression.
During the process of transcription, the information stored in a gene's DNA is transferred to a similar molecule called RNA (ribonucleic acid) in the cell nucleus. Both RNA and DNA are made up of a chain of nucleotide bases, but they have slightly different chemical properties. The type of RNA that contains the information for making a protein is called messenger RNA (mRNA) because it carries the information, or message, from the DNA out of the nucleus into the cytoplasm.
Translation, the second step in getting from a gene to a protein, takes place in the cytoplasm. The mRNA interacts with a specialized complex called a ribosome, which "reads" the sequence of mRNA bases. Each sequence of three bases, called a codon, usually codes for one particular amino acid. (Amino acids are the building blocks of proteins.) A type of RNA called transfer RNA (tRNA) assembles the protein, one amino acid at a time. Protein assembly continues until the ribosome encounters a “stop” codon (a sequence of three bases that does not code for an amino acid).
The flow of information from DNA to RNA to proteins is one of the fundamental principles of molecular biology. It is so important that it is sometimes called the “central dogma.”
Through the processes of transcription and translation, information from genes is used to make proteins.
