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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.
Discuss the difference between structural colors and colors based on pigments? How do the chromatophores of vertebrates and cephalopod molluscs differ in structure and function?
Chimpanzees have 24-pairs of chromosomes. Chimpanzee somatic cells contain DNA double helices.
The condition "xeroderma pigmentosum" is characterized by high rates of skin cancers like malignant melanoma. It is caused by mutations in any of many genes that encode enzymes that participate in:
What would happen to heart rate and peripheral resistance? Would it be probable to build a working circuit without the inhibitory interneuron? If so, how would you do it? If not, why can't you do it.
What is left-sided and right-sided heart failure? Which of these symptoms reflect left-sided heart failure and which reflect right-sided heart failure? Why with reasons.
Environmental Carcinogens mutagens and other environmental carcinogens UV light organic solvents high energy radiation asbestos tobacco smoke others factors? What does UV light do to a cell.
Which magnification was most helpful in making this determination? What optical principles are involved here and describe the role of each.
now a days, scientific advances are being made at an astounding rate, and nowhere is this more evident than in our understanding of the biology of heredity. Using DNA as a starting point, do you believe there are limits to the knowledge people sho..
Create a family tree for at least three generations of your family a freiends family, or a famous family follow the genetic traits.
Read over the description of the Human Inherited Traits in the Week 6 Experiment instructions in our course and complete the table given below.
An enzyme and its substrate are combined in a test tube but no product is formed. Another molecule is added to the tube, and now the product is formed at the normal rate. Give 2 reasons.what type of inhibition is working on the substrate.
Justify the hypothesis of early microorganisms were chemolithotroph and why phototrophic organisms that came after had pigments that absorbed maximally at UV and IR radiation
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