Question

Questions 1 and 2

Ionescent molten lava. Living LIVE II only a limited portion of the Earth's temperature range. In fact, the activities of life are possible only in the range from around 0°C (the freezing point of water) to 100°C (the boiling point of water). Of course, there are always exceptions to this rule. In some instances, life can survive at temperatures well below freezing and some organisms are adapted to very high temperatures. PROCEDURE (GENERAL EXPERIMENTAL SET-UP) Just before class we cut a potato into slices a half centimeter (0.5 cm) thick. Then, using a circular borer, we punched out a series of uniform, small cylinders of potato tissue and kept them in a dish of distilled water until the start of the experiment (this helps keep them fresh). Since all tissue cylinders are the same size and came from the same potato slice, we will assume that the amount of available enzyme in each is about the same. For the first exercise, we filled four test tubes with hydrogen peroxide and pre- incubated the tubes for 10 minutes at three different experimental temperatures Table 8-1; tube #1 in an ice bath (0°C), tube #2 in a room temperature bath, tube #3 at the human body temperature (37°C) bath and test tube #4 at 100°C). After pre-incubation, we placed a potato cylinder inside each test tube and filled it to the brim with hydrogen peroxide. a luglom stolog At the start of the experiment, we firmly placed a cork into the full tubes and turned each tube over, placing it upside down inside a beaker. om nie2676 mosaivatto bluo 16 mailos obora

Answer 1

1. Under optimal conditions, more gas will be produced when catalase (from potato cylinder) is exposed to hydrogen peroxide.

2. Under non-optimal conditions, less gas will be produced when catalase is exposed to hydrogen peroxide.