Q: Which of the following best represents the balanced chemical equation for photosynthesis?

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

Question 1

Which of the following best represents the balanced chemical equation for photosynthesis?

Accepted Answer

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

Question 2

Which of the following statements about photosynthesis is correct?

Accepted Answer

Photosynthesis is an endergonic process that converts solar energy into chemical energy.

Question 3

Which of the following best describes fermentation?

Accepted Answer

An anaerobic process that allows ATP production in the absence of oxygen.

Question 4

Which of the following accurately describes the difference between light-independent and light-dependent reactions in photosynthesis?

Accepted Answer

Light-independent reactions involve the Calvin cycle and create sugars, while light-dependent reactions involve photosystems I and II, use the electron transport chain, and create ATP from light energy.

Question 5

Which organism is capable of nitrogen fixation?

Accepted Answer

Anabaena

Question 6

Which of the following groups of organisms can fix carbon?

Accepted Answer

Grass, archaea, and protists

Question 7

What are the required inputs to produce one molecule of G3P in the Calvin cycle?

Accepted Answer

$$3CO_2$$, $$9ATP$$, and $$6NADPH$$

Question 8

During the second phase of the Calvin cycle, which of the following occurs?

Accepted Answer

3-phosphoglycerate is reduced to G3P using ATP and NADPH

Question 9

What is the role of RuBisCO in the Calvin cycle?

Accepted Answer

Catalyst for the fixation of CO$$_2$$

Question 10

Which of the following correctly describes the reaction pathway of the light-dependent reactions in photosynthesis?

Accepted Answer

Photosystem II $$\rightarrow$$ Electron transport chain $$\rightarrow$$ Photosystem I

Question 11

Photosystems I and II are both __________ and are located within the __________ of plants and algae.

Accepted Answer

Protein complexes; grana

Question 12

In chloroplasts, chemiosmosis generates ATP using a proton gradient across which structure?

Accepted Answer

Thylakoid membrane

Question 13

Which process splits water to produce oxygen during photosynthesis?

Accepted Answer

Photosystem II

Question 14

Which of the following processes utilize the electron transport chain?

Accepted Answer

Oxidative phosphorylation and light-dependent reactions

Question 15

What does it mean to 'fix' an inorganic element in biological systems?

Accepted Answer

To convert it to an organic form

Question 16

Why do organisms fix elements such as carbon or nitrogen?

Accepted Answer

Because the elements would otherwise be unusable in their inorganic forms

Question 17

Which gas is most abundant in Earth's atmosphere?

Accepted Answer

Nitrogen

Question 18

Which of the following is evidence supporting the endosymbiotic theory for the origin of chloroplasts?

Accepted Answer

Chloroplasts undergo binary fission, have circular DNA, and possess a double-membrane structure

Question 19

Which of the following statements about photoautotrophs is correct?

Accepted Answer

They use light energy to convert inorganic carbon into organic materials, are responsible for producing energy-rich sugars, and are producers.

Question 20

A muscle cell in a human is suddenly deprived of oxygen during intense exercise. Which process will it use to generate ATP, and what byproduct will accumulate?

Accepted Answer

Fermentation; lactic acid

Question 21

A plant is exposed to only green light. What will happen to its rate of photosynthesis and why?

Accepted Answer

The rate will decrease because chlorophyll reflects green light, so less energy is absorbed for photosynthesis.

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