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1) In a metabolic pathway, a typical control mechanism is to have: ________the final product inhibit the enzyme responsible for its own production.the final product inhibit an early step.a lack of reactant stimulate the pathway.a reactant inhibit a late step.2) Energy is stored in different forms in the body. ATP is very unstable and is put to use very quickly in cells. Other storage molecules last longer. Which gives the major energy stores of the body in the correct order?Short term: glycogen. Medium term: glucose. Long term: fat.Short term: fat. Medium term: glycogen. Long term: glucose.Short term: glucose. Medium term: glycogen. Long term: fat.3) What would be a typical regulatory system in a metabolic pathway?The pathway's product makes it go faster, so that more and more of the product builds up in the cell or body.The pathway's product slows it down, so that the product is maintained at a constant level in the cell or organism.4) Which best describes body weight regulation in a normal human who is living in a modern society?Our normal responses of appetite and metabolism ensure that adults remain at a given normal body weight. Any change from this normal weight sets in motion responses that return the body to its normal weight.Our normal responses of appetite and metabolism tend to cause weight gain in modern societies, and they also tend to make weight loss difficult.5) Which of the following are characteristics of metabolic pathways? (Select all that apply).Contain many intermediates.Are regulated.Each pathway has a key enzyme that catalyzes most of the reactionsAre specific for each organismAre often reversible6) Cells or organisms tend to maintain steady internal conditions. What is the name for this property and ability of life?HomeostasisAdaptationReproductionMetabolism7) What is the connection between a person's genes and his or her metabolism?DNA regulates metabolic pathways directlyenzymes encoded by genes regulate metabolic pathwaysstructural proteins encoded by genes regulate metabolic pathways8) Which of the following regulatory mechanisms is described incorrectly?feedback inhibition: product inhibits its own productionenzyme modification: enzyme gains or loses a functional groupcompetitive inhibitor: binds to the active site of the enzymeAll are correctsubstrate availability: more substrate increases enzyme activity (until it reaches saturation)9) How does the body react to rapid weight loss?Hunger increases and the metabolic rate goes down.Hunger increases and the metabolic rate goes up.Hunger decreases and the metabolic rate goes up.
Why may selfing be selected for in nature yet still be an ‘evolutionary dead end'. How many kilocalories must Janine eat each day to maintain her present body weight.
Explain three ways that the knowledge of metabolic processes photosynthesis and cellular respiration can improve your level of physical fitness.
A botanist studying waterlilies in an isolated pond observed 3-leaf shapes in the population, round, arrowhead, and scalloped.
Describe why 0.9 percent NaCl is an isotoinc solution. In another word, please explian the calculation that shows its osmolality is 300mOsm.
Describe why organisms only reproduce their own kind, and why offspring more closely resemble their parents than unrelated individuals of the similar species.
Describe the significance of historical achievements in proving the role of microorganisms in human health and disease and maintaining health of the environment. Be sure to explain the current classification of microorganisms.
Clarify the difference in their efforts to collect oxygen. Polychaetes have lateral, fleshy parapodia beset with numerous setae, and well developed head appendages such as jaws, tentacles and eyes. What function(s) do you think about parapodia serve.
find if the individual had been exposed to this disease.
A different walnut rooster was crossed to a rose hen, and all the progeny were walnut. What are the probable genotypes of the parents.
Red blood cells discovered in the plasma of mammals do not contain a nucleus. List all the possible benefits and limitations imposed on these cells by not having a nucleus.
During the method of inspiration, the ______ contracts, pulling downward. Also, the ______ muscles contract and lift the rib cage. Together, these muscle contractions result in the ______ in the pressure in the ______ cavity.
The mitochondria in them have a protein called thermogenin, which allows the flow of hydrogen ions through an inner mitochondrial membrane (bypassing the ATP synthase). Based on this and your understanding of cellular respiration, propose a mechanism..
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