Question 1

Which of the following is a feature shared by both prokaryotic and eukaryotic cells?

Accepted Answer

Presence of a plasma membrane

Question 2

A scientist discovers a unicellular organism with a cell wall, DNA in a nucleoid region, and no membrane-bound organelles. Which domain does this organism most likely belong to?

Accepted Answer

Bacteria

Question 3

Which of the following best describes the hierarchical organization of living organisms from smallest to largest?

Accepted Answer

Atoms, molecules, organelles, cells, tissues, organs, organ systems, families, communities, ecosystems

Question 4

Which of the following is NOT a function of the plasma membrane?

Accepted Answer

Synthesizes proteins

Question 5

A mutation prevents the formation of ribosomes in a cell. Which process would be directly affected?

Accepted Answer

Protein synthesis

Question 6

Which organelle is responsible for the conversion of solar energy into chemical energy in plant cells?

Accepted Answer

Chloroplast

Question 7

Which of the following statements about eukaryotic cells is correct?

Accepted Answer

They can be unicellular or multicellular.

Question 8

A cell is observed to have a large number of smooth endoplasmic reticulum. Which function is this cell likely specialized for?

Accepted Answer

Lipid synthesis and detoxification

Question 9

Which of the following best explains why phospholipids form bilayers in water?

Accepted Answer

They are amphipathic, with hydrophilic heads and hydrophobic tails.

Question 10

A patient has a genetic disorder that affects the function of lysosomes. Which of the following symptoms is most likely to result?

Accepted Answer

Accumulation of cellular debris

Question 11

Which of the following is a function of the cytoskeleton in eukaryotic cells?

Accepted Answer

Influencing cell shape and motility

Question 12

Which of the following structures is found in plant cells but not in animal cells?

Accepted Answer

Chloroplasts

Question 13

A cell is observed to have DNA, ribosomes, a plasma membrane, and a cell wall, but no membrane-bound organelles. Which of the following best describes this cell?

Accepted Answer

Prokaryotic cell

Question 14

Which of the following best describes the role of the Golgi apparatus in a eukaryotic cell?

Accepted Answer

Modifies, sorts, and exports proteins and lipids

Question 15

Which of the following is a correct statement about the evolutionary unity and diversity of life?

Accepted Answer

All living organisms descended from a common ancestor and share key features.

Question 16

Which of the following is a real-world example of homeostasis in cells?

Accepted Answer

A human red blood cell maintaining a constant internal pH despite changes in blood acidity

Question 17

Which of the following best explains why mitochondria are often called the 'powerhouse' of the cell?

Accepted Answer

They convert glucose and oxygen into ATP through cellular respiration.

Question 18

A mutation in a gene coding for a cytoskeletal protein affects muscle contraction in humans. Which cytoskeletal component is most likely involved?

Accepted Answer

Microfilaments (actin filaments)

Question 19

Which of the following equations best represents the process of cellular respiration occurring in mitochondria?

Accepted Answer

$$C_6H_{12}O_6$ + 6O_2 \rightarrow 6CO_2 + 6H_2O + ATP$$

Question 20

A researcher is studying a new drug that disrupts the function of transmembrane proteins. Which of the following cellular processes is most likely to be directly affected?

Accepted Answer

Selective transport of molecules across the plasma membrane

Characteristics and Organization of Cells in Living Organisms

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