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

$$ \mathrm{C_6H_{12}O_6} + 6\,\mathrm{O_2} \rightarrow 6\,\mathrm{CO_2} + 6\,\mathrm{H_2O} + \text{energy (ATP)} $$

Question 1

During cellular respiration, which molecule acts as the final electron acceptor in the electron transport chain, and what is the resulting product?

Accepted Answer

O$$_2$$; resulting in the formation of H$$_2O$$

Question 2

A patient is diagnosed with a metabolic disorder that prevents the reduction of NAD$$^+ to $$NADH during glycolysis. Which immediate effect would you expect in their cells?

Accepted Answer

Decreased ATP production because glycolysis cannot proceed efficiently

Question 3

Which of the following best explains why green light is least effective for driving photosynthesis in plants?

Accepted Answer

Green light is reflected by chlorophyll, so less energy is absorbed for photosynthesis

Question 4

Which of the following equations correctly represents the overall process of cellular respiration?

Accepted Answer

$$ \mathrm{C_6H_{12}O_6} + 6\,\mathrm{O_2} ightarrow 6\,\mathrm{CO_2} + 6\,\mathrm{H_2O} + 	ext{energy (ATP)} $$

Question 5

A scientist exposes a plant to water containing radioactive oxygen ($$^{18}O) $$and normal carbon dioxide. After photosynthesis, where will the radioactive oxygen most likely be found?

Accepted Answer

In the oxygen gas released

Question 6

Which of the following best describes the relationship between oxidation and reduction in cellular respiration?

Accepted Answer

Oxidation is the loss of electrons; reduction is the gain of electrons

Question 7

If a cell is unable to carry out the light reactions of photosynthesis, which molecule will it be unable to produce directly as a result?

Accepted Answer

ATP

Question 8

Which of the following scenarios would most likely result in increased genetic variation in a population?

Accepted Answer

A population reproducing sexually with independent assortment and crossing over

Question 9

A cell undergoes mitosis but fails to complete cytokinesis. What is the most likely outcome?

Accepted Answer

One cell with two nuclei

Question 10

Which of the following events occurs during interphase of the cell cycle?

Accepted Answer

Cell growth and duplication of the chromosomes

Question 11

A researcher observes a tumor that does not invade surrounding tissues or spread to other parts of the body. This tumor is best described as:

Accepted Answer

Benign

Question 12

Which of the following best explains why ATP is considered the 'energy currency' of the cell?

Accepted Answer

ATP stores energy in its phosphate bonds, which can be hydrolyzed to release energy for cellular work

Question 13

Which process is responsible for the net gain of 2 ATP molecules per glucose during glycolysis?

Accepted Answer

Substrate-level phosphorylation

Question 14

Which of the following statements about the movement of electrons during cellular respiration is correct?

Accepted Answer

Electrons are transferred to O$$_2$$, which is reduced to form water

Question 15

Which of the following is a reactant in the process of photosynthesis?

Accepted Answer

CO$$_2$$

Question 16

A cell with a mutation that prevents the separation of homologous chromosomes during meiosis I will most likely result in which of the following?

Accepted Answer

Nondisjunction, leading to gametes with abnormal chromosome numbers

Question 17

Which of the following best describes the role of photoautotrophs in the carbon cycle?

Accepted Answer

They convert inorganic CO$$_2$$ into organic molecules using light energy

Question 18

Which of the following statements about mitosis and meiosis is correct?

Accepted Answer

Sister chromatids separate during anaphase of mitosis and anaphase II of meiosis

Question 19

A cell is observed with chromosomes joined at the centromere, preparing to separate. These structures are best described as:

Accepted Answer

Sister chromatids

Question 20

Which of the following best describes the energy transformation that occurs during photosynthesis?

Accepted Answer

Light energy is converted to chemical energy stored in glucose

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