Q: Which of the following equations correctly represents the relationship for diffusion rate according to Fick’s Law?

$$Rate = D \times A \times \frac{\Delta C}{d}$$

Question 1

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

Accepted Answer

It separates the cytoplasm from the extracellular fluid and regulates the movement of substances in and out of the cell.

Question 2

A patient is given intravenous fluids that are hypotonic compared to their blood plasma. What is the most likely effect on their red blood cells?

Accepted Answer

The cells will swell and may burst due to water influx.

Question 3

Which organelle is primarily responsible for packaging and modifying proteins for secretion from the cell?

Accepted Answer

Golgi apparatus

Question 4

During protein synthesis, which process involves the conversion of DNA instructions into mRNA?

Accepted Answer

Transcription

Question 5

Which of the following equations correctly represents the relationship for diffusion rate according to Fick’s Law?

Accepted Answer

$$Rate = D 	imes A 	imes \frac{\Delta C}{d}$$

Question 6

A mutation in a gene involved in cell cycle regulation can lead to uncontrolled cell division. What is the term for a gene that, when mutated, can contribute to cancer development?

Accepted Answer

Oncogene

Question 7

Which organelle is responsible for ATP production through glycolysis, Krebs cycle, and electron transport chain?

Accepted Answer

Mitochondria

Question 8

Carrier-mediated transport across the plasma membrane is characterized by all of the following EXCEPT:

Accepted Answer

Movement of substances without the involvement of integral proteins

Question 9

Which of the following best explains the role of microvilli in intestinal epithelial cells?

Accepted Answer

They increase the surface area for absorption.

Question 10

If a cell is placed in a hypertonic solution, what will happen to the cell?

Accepted Answer

It will shrink as water leaves the cell.

Question 11

Which of the following is TRUE regarding the central dogma of molecular biology?

Accepted Answer

Information flows from DNA to RNA to protein.

Question 12

Which organelle contains hydrolytic enzymes and is responsible for breaking down damaged cellular components?

Accepted Answer

Lysosome

Question 13

A cell is observed to have a large number of ribosomes attached to its endoplasmic reticulum. What is the most likely function of this cell?

Accepted Answer

Secretion of proteins

Question 14

Which phase of the cell cycle is characterized by DNA replication?

Accepted Answer

S phase

Question 15

Which of the following statements about cellular differentiation is correct?

Accepted Answer

Differentiation occurs when cells turn off genes not needed for their specialized function.

Question 16

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

Accepted Answer

Synthesizing proteins

Question 17

Which of the following best describes the process of osmosis?

Accepted Answer

Net diffusion of water across a selectively permeable membrane

Question 18

Which of the following is a correct statement about the structure of DNA?

Accepted Answer

Guanine always pairs with cytosine.

Question 19

Which of the following transport mechanisms requires energy in the form of ATP?

Accepted Answer

Active transport

Question 20

A cell is observed to be actively engulfing bacteria. Which process is being used?

Accepted Answer

Phagocytosis

Cellular Level of Organization: Structure, Function, and Homeostasis

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