1 Select one answer. 10 points How does the body react to

1 Select one answer. 10 points How does the body react to rapid weight loss? Hunger decreases and the metabolic rate goes up. Hunger increases and the metabolic rate goes up. Hunger increases and the metabolic rate goes down. 2 Select one answer. 10 points Which of the graphs in the figure best illustrates the activity of an enzyme as substrate concentration increases from 0 to the saturation point of the enzyme? 3 Select one answer. 10 points What is the connection between a persons genes and his or her metabolism? DNA regulates metabolic pathways directly enzymes encoded by genes regulate metabolic pathways structural proteins encoded by genes regulate metabolic pathways 4 Select one answer. 10 points 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: fat. Medium term: glycogen. Long term: glucose. Short term: glycogen. Medium term: glucose. Long term: fat. Short term: glucose. Medium term: glycogen. Long term: fat. 5 Select all that apply. 10 points Which of the following are characteristics of metabolic pathways? Contain many intermediates. Are regulated. Each pathway has a key enzyme that catalyzes most of the reactions Are specific for each organism Are often reversible 6 Select one answer. 10 points What would be a typical regulatory system in a metabolic pathway? The pathways product slows it down so that the product is maintained at a constant level in the cell or organism. The pathways product makes it go faster so that more and more of the product builds up in the cell or body. 7 Select one answer. 10 points In a metabolic pathway a typical control mechanism is to have: ________ a lack of reactant stimulate the pathway. the final product inhibit the enzyme responsible for its own production. a reactantinhibit a late step. the final product inhibit an early step. 8 Select one answer. 10 points Which best describes body weight regulation in a normal human who is living in a modern society? Our normal responses of appetite and metabolism tend to cause weight gain in modern societies and they also tend to make weight loss difficult. 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. 9 Select one answer. 10 points Which of the following regulatory mechanisms is described incorrectly? All are correct competitive inhibitor: binds to the active site of the enzyme substrate availability: more substrate increases enzyme activity (until it reaches saturation) enzyme modification: enzyme gains or loses a functional group feedback inhibition: product inhibits its own production 10 Select one answer. 10 points The fundamental difference between competitive and non-competitive inhibition is: _________________________ the size of the active site of the enzyme. the manner of binding of the inhibitor to the enzyme. the manner of binding of the substrate to the enzyme. 11 Select one answer. 10 points Imagine a hypothetical organism (critter). A DIPLOID cell from this organism has 20 chromosomes. How many chromosomes would be found in a HAPLOID GAMETE of this organism? 20 10 40> 46 12 Select one answer. 10 points Imagine a hypothetical organism (critter). A DIPLOID cell from this organism has 20 chromosomes. How many chromosomes would be found in a GERM CELL of this organism? 40 10 46 20 13 Select one answer. 10 points Gametes are: haploid sometimes haploid and sometimes diploid diploid 14 Select one answer. 10 points During what stage of the cell cycle does the cell grow and carry out it regular functions? G1 G2 Mitosis S 15 Select one answer. 10 points If a germ cell has 20 chromosomes how many chromosomes will you find in the daughter cells after meiosis? 20 40 10 30 16 Select one answer. 10 points A muscle cell is an example of what type of cell? a zygote cell a somatic cell a gamete cell a germ cell 17 Select one answer. 10 points If a germ cell has 46 chromosomes how many chromosomes will you find in the daughter cells after meiosis? 92 46 69 23 18 Select one answer. 10 points During the S phase of the cell cycle DNA is replicated. What form would you expect the DNA to be in? It would be in a loose pile. It would be tightly wound around histone proteins as chromosomes. It would be made of separate nucleotides just floating in the nucleus. 19 Select one answer. 10 points During which stage of the cell cycle is the DNA replicated? S Cytokinesis Mitosis G2 20 Select one answer. 10 points If a cell is not dividing and has not yet begun replicating its DNA what phase of the cell cycle would it be in? S M G2 G1 21 Select one answer. 10 points An organism grows through what process? Cellular respiration Protein synthesis Mitosis Meiosis 22 Select one answer. 10 points Cancer can be the result of all of the following EXCEPT? A non-functional tumor suppressor gene and a non-functional proto-oncogene. Exposure to a carcinogen. A disregulation of the cell cycle. A functional tumor suppressor gene and a functional proto-oncogene. 23 Select one answer. 10 points What stage of division is this cell in? Anaphase Prophase Telophase Metaphase 24 Select one answer. 10 points What stage of division is this cell in? Metaphase Telophase Prophase Anaphase 25 Select one answer. 10 points The centrosome disappears and the nuclear envelopes form in what stage of mitosis? metaphase telophase interphase anaphase prophase 26 Select one answer. 10 points What stage of cell division is illustrated below? Metaphase Prophase Telophase Anaphase 27 Select one answer. 10 points Which of the following tasks is accomplished through the process of mitosis? Replacement of dysfunctional cells Production of sperm or eggs Cell growth 28 Select one answer. 10 points In what stage are sister chromatids separated and pulled to opposite sides of the cell. telophase interphase anaphase metaphase prophase

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