Question 1

Which of the following best describes the function of the cell membrane?

Accepted Answer

It acts as a semi-permeable barrier, allowing selective entry and exit of substances.

Question 2

A scientist discovers a new cell type that lacks a nucleus and membrane-bound organelles. Which classification best fits this cell?

Accepted Answer

Prokaryotic cell

Question 3

Which organelle is primarily responsible for the synthesis of ATP through cellular respiration?

Accepted Answer

Mitochondrion

Question 4

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

Accepted Answer

Protein synthesis

Question 5

Which of the following best explains why the nucleus is considered the control center of the cell?

Accepted Answer

It contains the genetic material (DNA) that directs all cellular activities.

Question 6

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

Accepted Answer

Golgi apparatus

Question 7

A cell is observed to have a large central vacuole. Which of the following is a likely function of this structure?

Accepted Answer

Storage of nutrients and waste products

Question 8

Which of the following statements about the cytoplasm is correct?

Accepted Answer

It is the site where most cellular metabolic processes occur.

Question 9

Which organelle contains hydrolytic enzymes for breaking down macromolecules, old cell parts, and invading pathogens?

Accepted Answer

Lysosome

Question 10

A cell is exposed to a toxin that disrupts the function of the smooth endoplasmic reticulum (SER). Which process would be most directly affected?

Accepted Answer

Synthesis of phospholipids for membranes

Question 11

Which of the following best describes the role of peroxisomes in the cell?

Accepted Answer

They are involved in the oxidation of specific biomolecules and the synthesis of plasmalogens.

Question 12

If a cell's lysosomes are nonfunctional, which of the following is a likely consequence?

Accepted Answer

Accumulation of waste and damaged organelles within the cell

Question 13

Which of the following is a function of the nucleolus?

Accepted Answer

Synthesis of ribosomal RNA (rRNA) and assembly of ribosome subunits

Question 14

Which of the following best explains why the cell membrane is described as 'semi-permeable'?

Accepted Answer

It allows some substances to pass through while blocking others.

Question 15

A cell is observed to self-destruct in a controlled manner after severe damage. Which process is most likely responsible for this?

Accepted Answer

Apoptosis

Question 16

Which of the following best describes the difference between rough and smooth endoplasmic reticulum?

Accepted Answer

Rough ER has ribosomes attached and is involved in protein synthesis, while smooth ER lacks ribosomes and is involved in lipid synthesis.

Question 17

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

Accepted Answer

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

Question 18

A genetic disorder causes a defect in the genes coding for enzymes in the peroxisome. Which of the following cellular processes would most likely be impaired?

Accepted Answer

Oxidation of fatty acids and detoxification of harmful substances

Question 19

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

Accepted Answer

Storing genetic information

Question 20

A researcher is studying a cell that contains nucleoli, mitochondria, and a Golgi apparatus. Which type of cell is this most likely to be?

Accepted Answer

Eukaryotic cell

Basic Structure and Function of the Cell: General Biology Study Notes

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