$$6CO_2 + 6H_2O + \text{Light Energy} \rightarrow C_6H_{12}O_6$ + 6O_2$$

$$C_6H_{12}O_6$ + 6O_2 \rightarrow 6CO_2 + 6H_2O + \text{Energy}$$

Question 1

Which of the following best describes the difference between kinetic and potential energy in biological systems?

Accepted Answer

Kinetic energy is associated with movement, while potential energy is due to structure or location.

Question 2

A diver climbs up a platform and then jumps into the water. Which energy transformations occur during this process?

Accepted Answer

Kinetic energy is converted to potential energy while climbing, and potential energy is converted to kinetic energy when jumping.

Question 3

Which law of thermodynamics explains why some energy is lost as heat during energy conversions in living organisms?

Accepted Answer

Second law of thermodynamics

Question 4

What is the main function of photosynthesis in producers?

Accepted Answer

To convert solar energy into chemical energy stored in sugars

Question 5

Which equation correctly represents the overall reaction for photosynthesis?

Accepted Answer

$$6CO_2 + 6H_2O + 	ext{Light Energy} ightarrow C_6H_{12}O_6$ + 6O_2$$

Question 6

During cellular respiration, which molecule is the primary energy carrier produced for cellular work?

Accepted Answer

ATP

Question 7

Which process allows muscle cells to generate ATP in the absence of oxygen?

Accepted Answer

Lactic acid fermentation

Question 8

Why do plants appear green to our eyes?

Accepted Answer

Chlorophyll reflects green/yellow light and absorbs blue/violet and red light.

Question 9

Which organelle is responsible for photosynthesis in plant cells?

Accepted Answer

Chloroplast

Question 10

What is the main by-product of the light reactions in photosynthesis?

Accepted Answer

Oxygen

Question 11

Which molecule shuttles electrons during the light reactions of photosynthesis?

Accepted Answer

NADPH

Question 12

Which of the following best explains the relationship between photosynthesis and cellular respiration?

Accepted Answer

Photosynthesis stores energy in glucose, while cellular respiration releases energy from glucose.

Question 13

Which equation correctly represents the overall reaction for aerobic cellular respiration?

Accepted Answer

$$C_6H_{12}O_6$ + 6O_2 ightarrow 6CO_2 + 6H_2O + 	ext{Energy}$$

Question 14

Which metabolic pathway occurs in the cytoplasm and breaks down glucose into pyruvic acid?

Accepted Answer

Glycolysis

Question 15

What is the role of oxygen in the electron transport chain during cellular respiration?

Accepted Answer

It serves as the final electron acceptor, forming water.

Question 16

Which process is responsible for the majority of ATP production during aerobic respiration?

Accepted Answer

Electron transport chain

Question 17

Which statement best describes the first law of thermodynamics as it applies to living organisms?

Accepted Answer

Energy can be transferred and transformed, but cannot be created or destroyed.

Question 18

Why must living organisms continually obtain energy from their environment?

Accepted Answer

Because some energy is lost as heat, increasing entropy.

Question 19

Which of the following is a real-world example of chemical energy being converted to kinetic energy in humans?

Accepted Answer

A person eating breakfast and then running a race.

Question 20

Which process allows yeast to produce alcohol and carbon dioxide in the absence of oxygen?

Accepted Answer

Alcohol fermentation

Chapter 4: Energy and Life – Study Notes for General Biology

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