Cell Work Unit Test A scientist fills a glass container with water and places an aquatic plant inside the container, then closes the lid and
places the container in direct sunlight. The scientist observes small bubbles on the surfaces of the plant's leaves on
days 1 and 2, but no bubbles on day 3. The scientist concludes that the bubbles were caused by photosynthesis.
Which substance should be added to the water in order for the bubbles to reappear? (1 point)
Item 1
Item 2
Item 3
o hydrogen gas
Item 4
Oglucose
Item 5
O oxygen
Item 6
carbon dioxide

1. amino acid refers to the fundamental building block of proteins, comprising of an amino group and a carboxyl group.

2. catalyst refers to any substance, which increases the rate of chemical reaction without being used up in the reaction.

3. a complex molecule containing he genetic code is dna or deoxyribonucleic acid.

4. an enzyme refers to a molecule of protein, which is unique in accelerating up a particular chemical reaction in the biological systems.

5. nucleic acid refers to an sequence of sugars, phosphates, and nitrogenous bases, for example, dna and rna.

6. a protein refers to a large, composite organic molecule comprising of a huge number of amino acids associated together with the of peptide bonds.

7. rna refers to a nucleic acid that takes part in the production of proteins.

8. substrate refers to a compound, which takes part in a chemical reaction, and is chemically modified by the reaction.