Q: Which equation correctly represents the overall process of cellular respiration?

$$\mathrm{C_6H_{12}O_6$} + 6\mathrm{O_2$} \rightarrow 6\mathrm{CO_2$} + 6\mathrm{H_2O} + \text{Energy (36-38 ATP)}$$

Q: Which of the following best describes the overall equation for photosynthesis?

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

Question 1

Which statement best describes the difference between catabolic and anabolic pathways in cellular metabolism?

Accepted Answer

Catabolic pathways break down complex molecules into simpler ones, releasing energy, while anabolic pathways build complex molecules from simpler ones, consuming energy.

Question 2

According to the First Law of Thermodynamics, which of the following is true?

Accepted Answer

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

Question 3

A reaction has a negative free energy change ($$\Delta G \u003c 0). $$What does this indicate about the reaction?

Accepted Answer

The reaction is exergonic and occurs spontaneously.

Question 4

Which of the following best describes the role of ATP in cellular work?

Accepted Answer

ATP transfers a phosphate group to another molecule, making it more reactive and able to perform work.

Question 5

Which of the following is an example of feedback inhibition in metabolic pathways?

Accepted Answer

The end product of a pathway inhibits an enzyme that acts earlier in the pathway.

Question 6

Which equation correctly represents the overall process of cellular respiration?

Accepted Answer

$$\mathrm{C_6H_{12}O_6$} + 6\mathrm{O_2$} ightarrow 6\mathrm{CO_2$} + 6\mathrm{H_2O} + 	ext{Energy (36-38 ATP)}$$

Question 7

During glycolysis, what is the net ATP yield per molecule of glucose?

Accepted Answer

2 ATP

Question 8

Which molecule acts as the final electron acceptor in the electron transport chain (ETC) during aerobic respiration?

Accepted Answer

Oxygen ($$\mathrm{O_2$})$$

Question 9

What is the main purpose of fermentation in cells?

Accepted Answer

To regenerate NAD+ so glycolysis can continue in the absence of oxygen.

Question 10

Which of the following best describes the overall equation for photosynthesis?

Accepted Answer

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

Question 11

Which pigment is primarily responsible for capturing light energy in photosynthesis?

Accepted Answer

Chlorophyll

Question 12

What is the main function of the Calvin cycle in photosynthesis?

Accepted Answer

To convert carbon dioxide into glucose using ATP and NADPH.

Question 13

Which process directly produces the most ATP during cellular respiration?

Accepted Answer

Electron Transport Chain (ETC) and chemiosmosis

Question 14

In photosynthesis, what is the role of water ($$\mathrm{H_2O}) in $$the light reactions?

Accepted Answer

It donates electrons to Photosystem II, releasing oxygen as a byproduct.

Question 15

Which of the following best explains why photorespiration is considered wasteful?

Accepted Answer

It consumes oxygen and releases CO2 without producing sugar, reducing photosynthetic efficiency.

Question 16

Which statement best describes substrate-level phosphorylation?

Accepted Answer

ATP is formed directly by transferring a phosphate group from a substrate to ADP.

Question 17

A scientist adds a non-protein helper to an enzyme reaction, and the reaction rate increases. What is this helper called?

Accepted Answer

Cofactor

Question 18

Which environmental factor is most likely to denature an enzyme and halt its activity?

Accepted Answer

Extreme temperature or pH

Question 19

Which of the following is true about the Z-scheme in photosynthesis?

Accepted Answer

It describes the flow of electrons from water through PSII, ETC, PSI, and NADP+.

Question 20

A patient is unable to produce sufficient NAD+ due to a genetic disorder. Which cellular process would be most directly affected?

Accepted Answer

Glycolysis

Metabolism, Cellular Respiration, and Photosynthesis: Core Concepts and Comparisons

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