B describe a controlled experiment that could have

Info iconThis preview shows pages 4–6. Sign up to view the full content.

View Full Document Right Arrow Icon
(b) Describe a controlled experiment that could have produced the data shown for either temperature or pH. Be sure toe state the hypothesis that was tested here. Enzymes are biological catalysts. (a) Relate the chemical structure of an enzyme to its specificity and catalytic activity. (b) Design a quantitative experiment to investigate the influence of pH or temperature on the activity of an enzyme. (c) Describe what information concerning the structure of an enzyme could be inferred from your experiment. Time (minutes) Maltose conc. ( μ M)
Background image of page 4

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
AP BIOLOGY 5 An experiment was conducted to measure the reaction rate of the human salivary enzyme α -amylase. Ten mL of a concentrated starch solution and 1.0 mL of α -amylase solution were placed in a test tube. The test tube was inverted several times to mix the solution and then incubated at 25 0 C. The amount of product (maltose) present was measured every 10 minutes for an hour. The results are given in a table below. a) Graph the data and calculate the rate of the reaction for the time period of 0-30 minutes. b) Explain why a change in the reaction was observed after 30 minutes. c) Draw and label another line on the graph to predict the results if the concentration of α -amylase was doubled. Explain your predicted results. d) Identify TWO environmental factors that can change the rate of an enzyme-mediated reaction. Discuss how each of these two factors would affect the reaction rate of the enzyme. 1989: Explain what occurs during the Krebs (citric acid) cycle and electron transport by describing the following: a) The location of the Krebs cycle and electron transport chain in the mitochondria. b) The cyclic nature of the reactions in the Krebs cycle. c) The production of ATP and reduced coenzymes during the cycle. d) The chemiosmotic production of ATP during electron transport 1993: Membranes are important structural features of cells. (a) Describe how membrane structure is related to the transport of materials across a membrane. (b) Describe the role of membranes in the synthesis of ATP in either cellular respiration or photosynthesis. (1993) Many physiological changes occur during exercise. (a) Design a controlled experiment to test the hypothesis that an exercise session causes short-term increases in heart rate and breathing rate in humans. (b) Explain how at least three organ systems are affected by this increased physical activity and discuss interactions among these systems. 2000 Feedback mechanisms are used by organisms to maintain the steady-state physiological condition known as homeostasis. Choose three of the following and for each, explain how feedback mechanisms maintain homeostasis. a) Blood glucose concentration b) Calcium ion concentration in blood c) Body temperature in mammals d) Osmolarity of the blood e) Pulse rate in mammals 2001 In biological systems, structure and function are related. Choose three of the following components of organ systems. alveolus villus sarcomere capillary nephron neuron a) For each component, describe the structure of the component and explain how that structure is responsible for the function of that component. b) For the three components that you choose in part a,
Background image of page 5
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page4 / 6

b Describe a controlled experiment that could have produced...

This preview shows document pages 4 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online