Plant Phys lab 8.docx - Lab Activity Name Test for the Presence of Starch in a Leaf Course Name Plant Physiology and Genetics and Evolution Lab Course

Plant Phys lab 8.docx - Lab Activity Name Test for the...

This preview shows page 1 - 3 out of 6 pages.

Lab Activity Name: Test for the Presence of Starch in a Leaf Course Name: Plant Physiology and Genetics and Evolution Lab Course ID: BIOL2401L Section: 1 Lab Number: 7 Student Names: Leneigh Arzu, Samantha Mahung Date: October 17 th , 2019 Date Due: October 31 st , 2019 Lecture Name: Mr. Josue Ake
INTRODUCTION: Photosynthesis is the process by which light energy is harvested by chlorophyll and used to convert inorganic raw materials - carbon dioxide and water to the products glucose and oxygen (A. Vidyasagar, 2018). Most photosynthesis takes places in the green parts of plants, in particular the leaves. One of the products of photosynthesis is C 6 H 12 O 6 , or glucose. As the plant receives sunlight it is constantly producing glucose and then transporting it outside of the chloroplast. However, the plant cannot transport glucose out of the chloroplast as fast as it is produced. To solve this problem the plant combines the glucose molecules into a larger molecule called starch. The glucose molecule is a monosaccharide that through the process of dehydration synthesis can form a larger molecule called a polysaccharide. This polysaccharide, starch, is stored inside the chloroplast until it can be transported. Iodine is a specific stain for starch, producing a black color (actually a very dark blue) where starch is present. (C. Forde, 2016) MATERIALS: Hibiscus and Blackberry leaves (one of each that was in the sun and one of each that has been kept in the dark) Beaker Tap water

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture