Introduction In addition to your textbook, below are some web resources that will add more background information about enzymes: This is relatively easy to understand. How do these reactions occur?
Lab 5 Diffusion and Osmosis Objectives a. In addition, higher concentration gradient will increase rate of diffusion including osmosis.
To determine concentration of overall solute in potato cells, wait until the potato cylinders reach equilibrium and measure the change in weight. Since the solute concentration of outside solution is known, one can determine the concentration of solute in potato cells by the change in weight after it reaches equilibrium Hazards - NaOH may cause eye or skin burns upon contact.
Harmful if swallowed or inhaled. Use gloves and goggles as precaution. Influence of molecule size on diffusion across a semi-permeable membrane Procesure 1: Observe effect of molecule size on diffusion across a semi-permeable membrane Use cellulose membrane dialysis tubing to simulate a cell membrane.
Cellulose membrane has tiny pores in it. Use Iodine, and phenolphthaleine as indicators. Iodine - starch indicator. Changes from light brown to dark blue for positive Phenolpthalein - pH indicator.
Seal one end of each bag by folding over about 1cm of the end and tying it tightly with a piece of string. The ends of the tube must be sealed tightly to prevent leaks 3.
Roll the untied end of each tube between your thumb and finger to open it and form a bag. Fill the other bag with 10ml of starch solution.
Carefully rinse the outside of each bag in tap water. Fill a beaker with ml of tap water and add 15 drops of 1 M NaOH. Fill a beaker with ml of tap water and add 60 drops of iodine.
Observe color changes in the two bags contents and the surrounding solutions After 30 minutes, record in table 1 the color inside and outside the bags.
Oberve Osmosis in Different Conditions and observe the effect of steepness in concentration graident on the rate of osmosis. Obtain 8 pieces of string and 4 pieces of pre-soaked dialysis tubing 15cm long. Open the other end of the tube by rolling it between your thumb and finger.
Try to carefully remove any excess air for each bag.
Quickly blot excess water from outside bags. Place dry paper towel on scale and tare. Weigh each bag to nearest 0. Remove bags from beakers at 15 minute intervals for one hour. For each min interval, record the total weight of each bag in table 2.
Determine the Concentration of Solute in living plant cells 1. Locate 5 beakers in the back of the room with 5 concentrations of salt solution 2.
The initial weights of potato cylinders that you see in solution were recorded. Carefully remove a potato cylinder from its solution.
Note the time you recorded the final weights. Influence of molecule SIZE on diffusion across a semi-permeable membrane.Page 1 of 3 BIO Anatomy & Physiology 1 Lab 1: Exercises 1, 2, 3, & 5 Exercise 1: The Language of Anatomy Objectives: • To describe the anatomical position and know its importance • To use proper anatomical terminology to describe body directions, planes, and.
Assign Fast Plant experimental design, pg A10, and 6 a-e due in lab Feb. The preliminary research report will be assigned the following week. Population assignment for lab February 1 AP Biology Lab Manual for Teachers — Supplement Lab 1: Diffusion and Osmosis Overview The information will assist teachers with aspects of Lab 1 that are not necessarily Exercise 1A.
• A French fry cutter produces potato strips that are easily cut into perfect cubes. Show transcribed image text BIO 04A Lab Report Name Exercise 1-Microscopy TABLE VE GAOKGTIATIOA DADLARICATOAATAPHETLIE OBJECTIVE OBJECTIVE OCULAR TOTAL NUMERICAL Scanning Low power High Power Oil Immersion objective 1.E Orientation of the image compared to the microscope.
Exercise and Cellular Respiration Purpose: To determine the effect of exercise on the rate of cellular respiration. Background: Cellular respiration is a process that involves the breakdown of glucose when combined with oxygen to release usable energy for the lausannecongress2018.com process occurs in the mitochondria of most eukaryotic cells.
The overall equation of cellular respiration. Lab 1: Heart Rate Lab (Revised Fall ) Experiment Biology with Computers Lab 1 - Biol Page 3 of 24 Testing Hypotheses via Experiments or by Pertinent Observations The most creative and challenging aspect of science is designing a means to test a hypothesis, be it.