What does it mean when a nutrient is "essential"? Name the two essential fatty acids needed for complete human nutrition.
A nutrient is essential if: A). its absence will create a deficiency or disease. or, B). The body does not produce the nutrient in sufficient amounts and it must be obtained by the diet. The only essential fatty acids are polyunsaturated fats linoleic (omega-6) and alpha-linoleic (omega-3) fatty acids.
In the induced-fit-model of enzyme action, a _______ must bind to an enzyme's ________ in order for the enzyme action to occur. 1. substrate; active site 2. product; active site 3. product; catalytic site 4. catalyst; activation energy 5. water molecule; allosteric site
Answer: 1. The site on an enzyme where it can enact change is called the active site. A substrate is the name given to any substance upon which an enzyme acts.
"Central dogma" refers to the flow of biological information from DNA to RNA to protein. 1. What is the process called to go from DNA to RNA? 2. What is the process called to go from RNA to protein?
1. transcription RNA polymerase copies a segment of DNA into RNA. 2. translation RNA segments travel to the ribosomes to become translated into proteins.