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

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

Question 1

Which of the following best explains why muscle cells contain a higher number of mitochondria compared to skin cells?

Accepted Answer

Muscle cells require more energy for contraction, so they have more mitochondria to meet their higher aerobic metabolic activity.

Question 2

A poison that inhibits ATP synthase would directly affect which part of the mitochondrion?

Accepted Answer

The inner membrane, where ATP synthase is located and ATP is produced.

Question 3

Which equation correctly represents the overall process of cellular respiration occurring in mitochondria?

Accepted Answer

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

Question 4

A plant cell is observed to have a large number of amyloplasts. What is the most likely function of these organelles?

Accepted Answer

Storage of starch in roots and tubers.

Question 5

Which of the following statements about the structure of mitochondria is correct?

Accepted Answer

The inner membrane is highly folded into cristae, increasing surface area for ATP generation.

Question 6

Which organelle is responsible for converting solar energy into chemical energy in the form of sugars?

Accepted Answer

Chloroplast

Question 7

A patient is exposed to cyanide, which inhibits a molecule involved in ATP production. In which organelle would you expect to find most of the cyanide?

Accepted Answer

Mitochondria

Question 8

Which pigment is essential for the absorption of light energy in chloroplasts?

Accepted Answer

Chlorophyll

Question 9

Which of the following is a shared feature of both mitochondria and chloroplasts?

Accepted Answer

Both contain their own DNA.

Question 10

Peroxisomes in liver cells detoxify alcohol by removing hydrogen atoms and combining them with which molecule to form hydrogen peroxide?

Accepted Answer

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

Question 11

Which organelle in plant cells is specialized for breaking down fatty acids into sugars to feed a growing seedling?

Accepted Answer

Glyoxysome

Question 12

Which compartment of the mitochondrion contains mitochondrial DNA, ribosomes, and enzymes for cellular respiration?

Accepted Answer

Mitochondrial matrix

Question 13

What is the primary function of peroxisomes in animal cells?

Accepted Answer

Oxidation of substances, including detoxification and breakdown of fatty acids.

Question 14

Which of the following best describes the role of cristae in mitochondria?

Accepted Answer

They increase the surface area of the inner membrane, enhancing ATP generation.

Question 15

A cell is observed to have dynamic organelles that move, change shape, and divide. Which organelles could these be?

Accepted Answer

Mitochondria and chloroplasts

Question 16

Which of the following is NOT a compartment found within chloroplasts?

Accepted Answer

Mitochondrial matrix

Question 17

Which organelle is most directly involved in the conversion of fatty acids to sugars in plant seeds?

Accepted Answer

Glyoxysome

Question 18

Which of the following best describes the function of thylakoids in chloroplasts?

Accepted Answer

They are flattened sacs where light energy is converted to chemical energy.

Question 19

Which type of plastid is responsible for storing pigments in fruits and flowers?

Accepted Answer

Chromoplast

Question 20

A scientist isolates an organelle from a plant cell that contains its own DNA, ribosomes, and is involved in photosynthetic sugar production. Which organelle is this?

Accepted Answer

Chloroplast

Mitochondria, Chloroplasts, and Peroxisomes: Energy Conversion and Organelle Specialization

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