Q: Which of the following equations correctly represents the net movement of molecules during facilitated diffusion?

$$ \text{Net movement} = D \times (C_{\text{high}} - C_{\text{low}}) $$

Q: Which equation best represents the production of ATP in mitochondria?

$$ \text{C}_6\text{H}_{12}\text{O}_6 + 6\text{O}_2 \rightarrow 6\text{CO}_2 + 6\text{H}_2\text{O} + \text{ATP} $$

Question 1

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

Accepted Answer

It provides a selectively permeable barrier that determines which substances enter or leave the cell.

Question 2

A patient is experiencing muscle weakness due to a defect in the organelle responsible for energy production. Which organelle is most likely affected?

Accepted Answer

Mitochondrion

Question 3

Which process involves the movement of water molecules across a membrane from an area of low solute concentration to high solute concentration?

Accepted Answer

Osmosis

Question 4

A cell is observed to engulf large particles such as bacteria. Which specific process is being utilized?

Accepted Answer

Phagocytosis

Question 5

Which of the following equations correctly represents the net movement of molecules during facilitated diffusion?

Accepted Answer

$$ 	ext{Net movement} = D 	imes (C_{	ext{high}} - C_{	ext{low}}) $$

Question 6

Which organelle is responsible for sorting and packaging proteins for secretion or delivery to other organelles?

Accepted Answer

Golgi apparatus

Question 7

A cell exposed to toxins relies on which organelle to neutralize free radicals and break down poisons?

Accepted Answer

Peroxisome

Question 8

Which of the following statements about ribosomes is correct?

Accepted Answer

Ribosomes are the site of protein synthesis and can be free in the cytosol or attached to the rough ER.

Question 9

During receptor-mediated endocytosis, which event occurs first?

Accepted Answer

Plasma proteins bind to specific molecules at the cell surface.

Question 10

Which cytoskeletal element is primarily responsible for resisting pulling forces on the cell and is composed of tough, insoluble protein fibers?

Accepted Answer

Intermediate filaments

Question 11

A scientist is studying the movement of secretory vesicles within a cell. Which cytoskeletal structure is most directly involved in this process?

Accepted Answer

Microtubules

Question 12

Which part of the nucleus acts as a scaffold to organize DNA and maintain the shape of the nucleus?

Accepted Answer

Nuclear lamina

Question 13

Which of the following best describes the role of the nucleolus?

Accepted Answer

It is involved in rRNA synthesis and ribosome assembly.

Question 14

A cell is observed to have an abundance of condensed chromatin. What does this indicate about the cell's genetic activity?

Accepted Answer

The cell's genetic material is largely inactive.

Question 15

Which equation best represents the production of ATP in mitochondria?

Accepted Answer

$$ 	ext{C}_6	ext{H}_{12}	ext{O}_6 + 6	ext{O}_2 ightarrow 6	ext{CO}_2 + 6	ext{H}_2	ext{O} + 	ext{ATP} $$

Question 16

Which organelle is most likely to be abundant in cells that secrete large amounts of protein, such as pancreatic cells?

Accepted Answer

Rough endoplasmic reticulum

Question 17

Which of the following is NOT a function of the cytoskeleton?

Accepted Answer

Providing a scaffold for DNA organization

Question 18

A mutation disrupts the formation of centrioles in a cell. Which cellular process would be most directly affected?

Accepted Answer

Mitotic spindle formation during cell division

Question 19

Which of the following statements about chromosomes is correct?

Accepted Answer

Chromosomes represent the highest level of organization of chromatin and contain long molecules of DNA.

Question 20

During which phase of the cell cycle is the cell metabolically active and growing rapidly, but not yet dividing?

Accepted Answer

G1 phase of interphase

Chapter 2: Cells – The Living Units (Anatomy & Physiology Study Notes)

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