cell respiration lab report

cell respiration lab report - Abstract We all need energy...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Abstract We all need energy to function. We get this energy from the foods we eat. The most efficient way for cells to harvest energy stored in food is through cellular respiration, a catabolic pathway for the production of adenosine triphosphate (ATP). ATP, a high energy molecule, is expended by working cells. There are two types of respiration; anaerobic and aerobic. Anaerobic respiration produces 2 pyruvates during glycolysis without the use of oxygen and utilizes the electron transport chain. Aerobic Cellular Respiration has three main stages: glycolysis, the citric acid cycle, and the electron transport chain. During Aerobic Respiration, oxygen is used to produce 2 pyruvates during glycolysis and produces substances in the citric acid cycle which are used in oxidative phosphorylation. Introduction In this experiment we worked with seeds that are living but dormant. A seed contains an embryo plant and a food supply surrounded by a seed coat. When the necessary conditions are met, germination occurs and the rate of cellular respiration greatly increases. This lab was done to test the effect of temperature on the rate of cellular respiration in non-germinated (dry) versus germinating seeds. We had to determine the change in gas volume in respirometers to determine how much oxygen was consumed during the experiment. There were six respirometers set up containing germinating pea seeds, non-germinated pea seeds and glass beads, or glass beads. One of each was placed in the two baths. We measured the oxygen consumption by taking a reading of a respirometer submerged in two water baths. The first bath will be cold water and the second warm to determine the effect of temperatures on oxygen consumption. Our negative control will be glass beads to measure the increase or decrease in atmospheric pressure or temperature changes. Cellular Respiration could be measured in three different ways: Consumption of O 2 , Production of CO 2 , and the Release of energy. There is a direct relationship between oxygen consumption and Carbon Dioxide produced, therefore the more O 2 consumed the more CO 2 produced. To keep the amount of CO 2 produced from canceling out any pressure gained or lost from the consumption of CO 2 we are adding KOH (Potassium Hydroxide) to the respirometers. Since the CO 2 will be selectively removed the change in the volume of gas in the respirometer should be directly related to the oxygen consumed. In this experiment the germinating peas, in both water baths, should consume much more
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/16/2009 for the course BIO 82478 taught by Professor Johnd.griner during the Spring '08 term at Valdosta State University .

Page1 / 4

cell respiration lab report - Abstract We all need energy...

This preview shows document pages 1 - 2. Sign up to view the full document.

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