Q: Which of the following is the correct balanced equation for aerobic 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

Which of the following best describes the difference between potential energy and kinetic energy in a biological system?

Accepted Answer

Potential energy is stored energy, such as that in chemical bonds, while kinetic energy is the energy of motion, such as molecules moving during diffusion.

Question 2

What type of energy is stored in the bonds of glucose molecules?

Accepted Answer

Chemical energy

Question 3

During an endergonic reaction, what happens to energy?

Accepted Answer

Energy is absorbed from the surroundings and stored in the products.

Question 4

Which of the following reactions is an example of an exergonic process?

Accepted Answer

Cellular respiration

Question 5

What happens to ATP when it provides energy for cellular work?

Accepted Answer

It is hydrolyzed to ADP and inorganic phosphate, releasing energy.

Question 6

Which statement best explains the 'lock and key' model of enzyme function?

Accepted Answer

The enzyme's active site is specifically shaped to fit only a particular substrate.

Question 7

How does high heat typically affect enzyme activity?

Accepted Answer

It denatures the enzyme, causing loss of function.

Question 8

Which of the following best describes feedback inhibition in metabolic pathways?

Accepted Answer

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

Question 9

What is the main purpose of aerobic cellular respiration?

Accepted Answer

To produce ATP by breaking down glucose in the presence of oxygen.

Question 10

Which of the following is the correct balanced equation for aerobic 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 11

Where does glycolysis occur in the cell, and how many net ATP molecules are produced per glucose molecule during glycolysis?

Accepted Answer

In the cytoplasm; 2 net ATP

Question 12

Which of the following best describes the relationship between photosynthesis and aerobic respiration?

Accepted Answer

Photosynthesis stores energy in glucose, while respiration releases that energy for cellular use.

Question 13

Which process evolved first: aerobic or anaerobic respiration?

Accepted Answer

Anaerobic respiration

Question 14

What are the two main types of fermentation, and what are their primary products?

Accepted Answer

Alcoholic fermentation produces ethanol and CO$$_2$$; lactic acid fermentation produces lactic acid.

Question 15

Which pigment is primarily responsible for absorbing light energy during photosynthesis?

Accepted Answer

Chlorophyll

Question 16

In which organelle does photosynthesis occur?

Accepted Answer

Chloroplast

Question 17

What is the correct balanced 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 18

Which of the following best describes the main function of mitosis in multicellular organisms?

Accepted Answer

To produce genetically identical somatic cells for growth and repair

Question 19

Which of the following is a characteristic of malignant tumors?

Accepted Answer

They invade surrounding tissues and can metastasize to other parts of the body.

Question 20

Which process introduces genetic variation during sexual reproduction?

Accepted Answer

Crossing over during meiosis

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