Question 1

Which of the following best describes the function of the plasma membrane in a typical human cell?

Accepted Answer

It acts as a selectively permeable barrier, regulating the movement of substances into and out of the cell.

Question 2

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

Accepted Answer

Combining two amino acids to form a dipeptide and releasing $$H_2O.$$

Question 3

Which of the following best describes a negative feedback system in human physiology?

Accepted Answer

A process that reverses a change and restores the body to its set point.

Question 4

Which of the following is NOT a function of proteins in the human body?

Accepted Answer

Storing genetic information.

Question 5

Which of the following best describes the difference between a monosaccharide and a polysaccharide?

Accepted Answer

A monosaccharide is a single sugar unit, while a polysaccharide is a long chain of sugar units.

Question 6

Which of the following best describes the role of ATP in the human body?

Accepted Answer

ATP stores and transfers energy for cellular processes.

Question 7

Which of the following best describes the process of hydrolysis?

Accepted Answer

The breakdown of a molecule by adding water.

Question 8

Which of the following is a correct statement about the pH scale?

Accepted Answer

A solution with a pH of 7 is neutral.

Question 9

Which of the following best describes the structure of an amino acid?

Accepted Answer

A central carbon atom bonded to a hydrogen atom, an amino group ($$-NH_2$), a carboxyl group (-$$COOH$$), and a variable R group.

Question 10

Which of the following best explains why water is considered a polar molecule?

Accepted Answer

It has a partial positive charge on the hydrogen atoms and a partial negative charge on the oxygen atom.

Question 11

Which of the following best describes the function of ribosomes in a cell?

Accepted Answer

They synthesize proteins by translating mRNA.

Question 12

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

Accepted Answer

Blood clotting following an injury.

Question 13

Which of the following best describes the difference between DNA and RNA?

Accepted Answer

DNA is double-stranded, while RNA is single-stranded.

Question 14

Which of the following best describes the function of mitochondria in a cell?

Accepted Answer

They generate ATP through aerobic respiration.

Question 15

Which of the following best describes the process of osmosis?

Accepted Answer

The movement of water across a semipermeable membrane from an area of low solute concentration to high solute concentration.

Question 16

Which of the following best describes the function of lysosomes in a cell?

Accepted Answer

They digest and recycle cellular waste and foreign materials.

Question 17

Which of the following best describes the difference between isotonic, hypertonic, and hypotonic solutions?

Accepted Answer

Isotonic solutions have the same solute concentration as the cell, hypertonic solutions have a higher solute concentration, and hypotonic solutions have a lower solute concentration.

Question 18

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

Accepted Answer

It actively transports sodium ions out of the cell and potassium ions into the cell, maintaining the electrochemical gradient.

Question 19

Which of the following best describes the process of transcription in protein synthesis?

Accepted Answer

The synthesis of mRNA from a DNA template.

Question 20

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

Accepted Answer

They connect complementary nitrogenous bases between the two DNA strands.

Anatomy & Physiology Exam 1 Study Guide: Human Body Orientation, Chemistry, and Cells

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