题目内容

1. Starch and cellulose are both made up of chains of glucose but the bonding of the glucose molecules is different.

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2. Humans are able to digest cellulose even though we lack the digestive enzymes to break the bond linking the glucose molecules.

3. Bread is a source of starch. If you chew it longer than normal the taste becomes sweeter which is a confirmation that the enzyme amylase is present in the saliva and has begun to break the starch into glucose molecules.

4. Cellulose, hemi-cellulose, pectin, and lignin are all terms associated with which dietary substance?______

A better understanding of the nutrient requirements of plants has made it possible to grow plants without soil. What is the name of this type of gardening?______