New York State Chemistry RegentsNew York State Earth Science Regents

Living Environment Regents August 2010 Question 11 PDF Print E-mail
Friday, 27 May 2011 12:25


Correct answer: (2) Increased concentration of glucose in leaf cells

Photosynthesis is the conversion of light energy, water, and carbon dioxide (CO2) into oxygen and chemical energy in the form of glucose, which is then to be stored or distributed to the different parts of the plant. Thus, when more carbon dioxide is used up, more glucose is produced as well.

Incorrect answers:

(1) Increased use of starch in root cells

During photosynthesis, carbon dioxide (CO2) and water is converted to glucose and oxygen through the use of light energy. Thus, sugar, such as starch, is not used up during the process. Sugar, together with oxygen, is used up during respiration.

(3) Increased ATP in root cells

ATP or adenosine triphosphate is the energy currency of cells. Energy is stored in the cells in the form of glucose. Thus, the energy formed after photosynthesis is not found as ATP, but as glucose molecules.

(4) Decreased concentration of oxygen in leaf cells

Plants produce their own food through the conversion of carbon dioxide (CO2), water, and sunlight into glucose and oxygen. Since this is a chemical reaction, then it must follow the rule that the reactants and the products must be in equilibrium. When carbon dioxide (reactant) is increased, the products, oxygen and glucose, must also increase.



You must be a registered user to post comments.

Copyright Information

All works and materials contained within this site Copyright © 2009 Technology Strategies For Success inc.


We are not affiliated with, nor endorsed by, the New York State Education Department.

The information contained in this website is for general information purposes only. The information is provided by "Technology Strategies for Success" and while we strive to keep the information up-to-date and correct, we make no representations or warranties of any kind, express or implied, about the completeness, accuracy, reliability, suitability or availability with respect to the website or the information, products, services, or related graphics contained on the website for any purpose. Any reliance you place on such information is therefore strictly at your own risk.