Q: Which equation correctly represents the metabolism of glucose during cellular respiration?

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

Question 1

Which of the following best describes homeostasis in the human body?

Accepted Answer

The process by which the body maintains a stable internal environment despite changes in external conditions.

Question 2

A patient is experiencing dangerously low blood glucose levels. Which type of feedback loop is most likely to be activated to restore homeostasis?

Accepted Answer

Negative feedback loop

Question 3

Which of the following is NOT one of the four major tissue types found in the human body?

Accepted Answer

Epithelial tissue

Question 4

Which equation correctly represents the metabolism of glucose during cellular respiration?

Accepted Answer

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

Question 5

Which of the following best explains why water is considered the universal solvent in biological systems?

Accepted Answer

Water's polarity allows it to dissolve a wide variety of ionic and polar substances.

Question 6

Which type of chemical bond is least likely to dissolve in water?

Accepted Answer

Nonpolar covalent bond

Question 7

A cell is placed in a solution and begins to swell. What is the tonicity of the solution relative to the cell?

Accepted Answer

Hypotonic

Question 8

Which of the following best describes the function of the sodium-potassium pump in cells?

Accepted Answer

It actively transports $3$ Na$^+$ ions out of the cell and $2$ K$^+$ ions into the cell, using ATP.

Question 9

Which of the following is a correct statement about the Central Dogma of Biology?

Accepted Answer

DNA is transcribed into RNA, which is then translated into protein.

Question 10

During which phase of the cell cycle does DNA replication occur?

Accepted Answer

S phase

Question 11

Which of the following is a major function of membrane proteins?

Accepted Answer

Transporting molecules across the cell membrane

Question 12

Which of the following best describes the difference between passive and active transport across the cell membrane?

Accepted Answer

Passive transport does not require energy, while active transport requires ATP.

Question 13

Which of the following is a correct example of a dehydration synthesis reaction?

Accepted Answer

Formation of a peptide bond between two amino acids with the release of water: $	ext{Amino acid}_1 + 	ext{Amino acid}_2 ightarrow 	ext{Dipeptide} + \mathrm{H_2O}$

Question 14

Which organelle is primarily responsible for ATP production in eukaryotic cells?

Accepted Answer

Mitochondrion

Question 15

Which of the following statements about enzymes is correct?

Accepted Answer

Enzymes lower the activation energy required for chemical reactions.

Question 16

Which of the following best describes the structure of a phospholipid in the cell membrane?

Accepted Answer

A hydrophilic phosphate head and two hydrophobic fatty acid tails

Question 17

Which of the following is a correct example of a positive feedback loop in the human body?

Accepted Answer

Release of oxytocin during childbirth to intensify uterine contractions

Question 18

Which of the following best describes the role of hydrogen bonds in DNA structure?

Accepted Answer

They stabilize the double helix by connecting complementary base pairs.

Question 19

Which of the following is a correct statement about the fluid mosaic model of the cell membrane?

Accepted Answer

The membrane is composed of a phospholipid bilayer with proteins embedded throughout, allowing lateral movement.

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