Question 1

Which of the following best describes the relationship between photosynthesis and cellular respiration in terms of matter and energy transformations?

Accepted Answer

Photosynthesis stores energy by converting carbon dioxide and water into glucose and oxygen, while cellular respiration releases energy by breaking down glucose and oxygen into carbon dioxide and water.

Question 2

Which equation correctly represents the process of photosynthesis?

Accepted Answer

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

Question 3

Autotrophs and heterotrophs differ in how they obtain energy. Which statement is correct?

Accepted Answer

Autotrophs produce their own food using sunlight or inorganic chemicals, while heterotrophs obtain energy by consuming other organisms.

Question 4

Which of the following best explains why photosynthesis and cellular respiration are considered complementary processes?

Accepted Answer

The products of photosynthesis are the reactants of cellular respiration, and vice versa.

Question 5

Why is photosynthesis crucial for the global carbon cycle?

Accepted Answer

It converts atmospheric carbon dioxide into organic molecules, reducing atmospheric CO$$_2$$ levels.

Question 6

How does the economic health of agriculture in Canada depend on photosynthesis?

Accepted Answer

Photosynthesis enables crop plants to produce the organic matter necessary for growth and yield.

Question 7

Which of the following correctly describes the role of ATP in cellular energy transfer?

Accepted Answer

ATP stores energy in its phosphate bonds and releases it when converted to ADP.

Question 8

During intense exercise, muscle cells may switch to anaerobic respiration. What is a consequence of this switch?

Accepted Answer

Increased production of lactic acid, leading to muscle fatigue.

Question 9

Which equation represents aerobic cellular respiration?

Accepted Answer

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

Question 10

Industrial fermentation relies on anaerobic respiration. Which product is commonly generated by this process?

Accepted Answer

Ethanol

Question 11

A farmer notices that crop yields are lower in a shaded area of the field. Which process is most directly affected by reduced sunlight?

Accepted Answer

Photosynthesis

Question 12

Which of the following is a direct result of cellular respiration in animal cells?

Accepted Answer

Production of ATP for cellular activities

Question 13

If a fishery experiences a sudden drop in aquatic plant populations, what is a likely consequence for the ecosystem?

Accepted Answer

Reduced oxygen levels due to decreased photosynthesis

Question 14

Which statement best explains why forests are considered 'carbon sinks'?

Accepted Answer

Forests absorb carbon dioxide during photosynthesis and store it in biomass.

Question 15

Which molecule is regenerated from ATP after energy is released for cellular work?

Accepted Answer

ADP

Question 16

A student mixes yeast, sugar, and water in a sealed container. After several hours, the container contains bubbles and a strong smell of alcohol. Which process is responsible for these observations?

Accepted Answer

Anaerobic respiration (fermentation)

Question 17

Which of the following is NOT a product of photosynthesis?

Accepted Answer

Carbon dioxide

Question 18

Which process is primarily responsible for the release of energy from food molecules in most organisms?

Accepted Answer

Cellular respiration

Question 19

During fermentation, which molecule is used as the final electron acceptor?

Accepted Answer

An organic molecule such as pyruvate

Question 20

Which of the following best describes the role of ATP and ADP in the energy cycle of cells?

Accepted Answer

ATP is converted to ADP when energy is used, and ADP is converted back to ATP during energy storage.

Photosynthesis and Cellular Respiration: Matter and Energy Transformations

Study Guide - Practice Questions

Study Guide - Flashcards