SCHOOL OF ARTS, SCIENCES AND EDUCATION

Mid-Term Exams in Biological Science

Name: _____________________________________ Date: ____________ Score: ________

I. MULTIPLE CHOICE: Choose the letter of the best answer for each item then write your answer on the space provided.

_____1. Which of the following are produced by reactions that take place in the thylakoids and consumed by reactions in the stroma?a. CO2 and H2O c. glucose and O2 e. CO2 and ATP b. NADP+ and ADP d. ATP and NADPH c.

_____2. When light strikes chlorophyll molecules, they lose electrons, which are ultimately replaced by a. splitting water c. removing them from NADPH e. fixing carbon b. breaking down ATP d. oxidizing glucose

_____3. The energy storage molecule used by most organisms is called _______. a. Adenosine triphosphate or ATP c. Glyceraldehyde phosphate or PGAL b. Phosphoglycerate or PGA d. Nicotinamide Adenine Di-Phosphate

_____4. Which process breakdown glucose to pyruvate and takes place in the cytoplasm of every living cell? a. glycolysis b. Krebs Cycle c. lactic acid fermentation d. Electron Transport Chain

_____5. A plant can be recognized whether it is a monocot or a dicot by its _____, a. kind of venation b. number of petals c. vascular tissue d. all of these

_____6. The process of photosynthesis consumes __________ and produces ___________. a. chlorophyll…….. H2O c. H2O ………… O2 e. CO2 ……….. chlorophyllb. H20 …….. CO2 d. glucose …….. O2

_____7. What is the primary importance of carbon dioxide in plants? a. makes respiration possible c. makes decomposition possible b. makes photosynthesis possible d. makes combustion possible

_____8. An organism that can carry on photosynthesis is ________.a. autotrophic b. scavenger c. heterotrophic d. saprophytic

_____9. The greatest contributor of electrons to the electron transport system is _____. a. oxygen b. glycolysis c. the Krebs Cycle d. fermentation

_____10. In photosynthesis, _________ is oxidized and _______ is reduced. a. glucose …….. oxygen c. water …… carbon dioxide e. water …. oxygen b. carbon dioxide ….. water d. glucose … carbon dioxide

_____11. It happens in unicellular fungus (yeast) and converts pyruvate to CO2 and ethanol. a. lactic acid fermentation b. alcoholic fermentation c. glycolysis d. Krebs Cycle

_____12. Vascular tissues are important to plants because they _______. a. keep plants from becoming very large b. enable the plants to use sunlight to make food

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c. keep water in the roots of plants and away from the leaves d. ensure the rapid movement of food and water within the plant

________ 13. The electrons from photosystem II are removed and replaced by electrons donated from water and it synthesizes ATP and NADPH.

a. Cyclic Electron Flow b. Non-cyclic Electron Flow c. Glycolysis d. Photolysis

__________14. A process in which pyruvate accepts electrons from NADH and glycolysis continues to operate for a limited period.

a. Fermentation b. Anaerobic Respiration c. Aerobic Respiration d. electron Transport Flow

___________15. A process by which green plants convert light energy into chemical energy.

a. Photolysis b. Phosporylation c. Photosynthesis d. Glycolysis

A. Complete the equations involved during photosynthesis and cellular respiration. (5 pts. Each)

1. Photosynthesis

sunlightchlorophyll

+ 6O2 +

2. Respiration

C6H12O6 + + + Energy

3. Lactic Acid Fermentation

Pyruvate + _____________ + NAD

4. Alcoholic Fermentation

_________ + NADH Ethanol + _________ + _________

5. Anaerobic Respiration

_______________ ____________________ + 2CO2 energy

B. Discuss each briefly. ( 5 pts. each )

1. Light Phase

2. Dark Phase

3. Photosynthesis

C. Describe the importance of respiration in our body and site an example. (10 points)

GOOD LUCK …. God Speed!

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