Biology

PART I: A SIMPLE ENZYME-CATALYZED REACTION When you cut open an apple, banana or pear, you cut through many cell walls and release the complex contents of many cells. Left exposed to the air, the white surface of the fruit will turn brown in a short time. This familiar color change is a good example […]

PART V: MEASURING LIVING CELLS 6.10 Exercise 10 – Preparing a wet mount of a naturally pigmented (red onion) cell. To view living cells under a microscope, you first have to “wet” mount them on a glass slide. Prepare wet mounts of onion cells as follows: 1. Place a clean microscope slide on a paper

PART IV: ESTIMATING THE SIZES OF CELLS When looking at objects through a compound microscope, it is difficult to get a feel for just how big (or small) they really are. We need some kind of “ruler”. The actual size of an object seen under the microscope can be estimated by first measuring the diameter

PART III: THE DISSECTING MICROSCOPE 6.5 Exercise 5 – Features of the dissecting microscope 1. Locate the dissecting microscope in your carrel or in the Central Study Area. Identify the major features of the dissecting scope: stage (for specimen), eyepieces, objective lens, zoom knob, focusing knob, and light sources above and below specimen (Figure 2).

Effect of PH on enzyme-catalyzed reactions Through the second experiment-effects of pH on enzyme-catalyzed reactions, we get PH and absorbance of whole 5 sample with the use and compare of blank sample. No.1 sample with PH 3 and the absorbance is 1.76. No.2 sample with PH 5 and the absorbance is 1.08. No.3 sample with

Effect of temperature on enzyme-catalyzed reactions Through the first experiment-effect of temperature on enzyme-catalyzed reactions, we get temp (°C), absorbance and color changes of whole 5 sample with the use and compare of blank sample. No.1 sample is in 0 °C, the absorbance after whole experiment ends is 2.34 and it change to yellow, not

Effects of pH on enzyme-catalyzed reactions Materials 1. 6 test tubes with a test tube rack 2. a wax pencil 3. a pipette 4. spec 20 5. potato extract 6. water 7. catechol 8. distilled water 9. 5 different buffer solutions (PH 3, PH 5, PH 7, PH 9, PH 11). Method 1. We use

Effects of environmental factors on the rate of enzyme catalyzed reactions Guangyu Qi & Xiaoxi Yue Professor Sahil Wadhwa 22th February 2019     · Introduction In this report, we will mainly talk about what affect the rate of enzyme catalyzed reactions by discussing two experiments, that are experiment-effect of temperature on enzyme-catalyzed reactions and

List the major elements required for bacterial growth along with their function. Directions: Answer following questions after reading the information and watching the video from the link below. Use color RED or BLUE for your answers. Submit the completed document on eCampus for grading. Refer to · the textbook chapter 4 (sections 4.5 and 4.6)

Cultivation of bacteria in the laboratory- Streak plate Read the information from textbook from chapter 4 review sections 4.3 (pages 96-97)) to answer the following questions. Pure Culture 1. What is a pure culture? 2. What is the need for a pure culture of bacteria? 3. How many bacteria are required to start a colony?