$$6\mathrm{CO_2$} + 6\mathrm{H_2O} + \text{light energy} \rightarrow \mathrm{C_6H_{12}O_6$} + 6\mathrm{O_2$}$$

Question 1

Which statement best describes the function of the plasma membrane in eukaryotic cells?

Accepted Answer

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

Question 2

A scientist observes a cell with no membrane-bound nucleus and circular DNA. Which cell type is most likely being observed?

Accepted Answer

Prokaryotic cell

Question 3

Which organelle is primarily responsible for the chemical modification and packaging of proteins for export from the cell?

Accepted Answer

Golgi apparatus

Question 4

According to the cell theory, which statement is correct?

Accepted Answer

All living material is made up of cells or the products of cells.

Question 5

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

Accepted Answer

They use chemical energy in food to produce ATP for cellular activities.

Question 6

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

Accepted Answer

Protein synthesis

Question 7

Which structure is found in eukaryotic cells but not in prokaryotic cells?

Accepted Answer

Membrane-bound nucleus

Question 8

If a cell's lysosomes are nonfunctional, which cellular process would be most impaired?

Accepted Answer

Digestion of macromolecules and cellular debris

Question 9

Which organelle is directly involved in the synthesis and modification of lipids and carbohydrates?

Accepted Answer

Smooth endoplasmic reticulum

Question 10

A cell is observed to have a double membrane, its own DNA, and is involved in photosynthesis. Which organelle is being described?

Accepted Answer

Chloroplast

Question 11

Which equation best represents the process of cellular respiration occurring 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 12

Which of the following best describes the role of the cytoskeleton in eukaryotic cells?

Accepted Answer

It maintains cell shape, anchors organelles, and moves organelles.

Question 13

During cell division, chromatin condenses to form chromosomes. What is the primary reason for this condensation?

Accepted Answer

To facilitate the equal distribution of genetic material to daughter cells.

Question 14

Which organelle is responsible for producing ribosomal RNA (rRNA)?

Accepted Answer

Nucleolus

Question 15

A cell is unable to chemically modify proteins after their synthesis. Which organelle is most likely malfunctioning?

Accepted Answer

Rough endoplasmic reticulum

Question 16

Which of the following is NOT part of the endomembrane system?

Accepted Answer

Mitochondrion

Question 17

Which process is most directly affected if the nuclear envelope is damaged and nuclear pores are blocked?

Accepted Answer

Transport of RNA and proteins between the nucleus and cytoplasm

Question 18

Which of the following best describes the difference between prokaryotic and eukaryotic cells?

Accepted Answer

Eukaryotic cells have a membrane-bound nucleus, prokaryotic cells do not.

Question 19

Which organelle is most directly involved in sorting and packaging proteins for shipment to other parts of the cell or for export?

Accepted Answer

Golgi apparatus

Question 20

Which equation best represents the process of photosynthesis occurring in chloroplasts?

Accepted Answer

$$6\mathrm{CO_2$} + 6\mathrm{H_2O} + 	ext{light energy} ightarrow \mathrm{C_6H_{12}O_6$} + 6\mathrm{O_2$}$$

Cell Structure and Function: General Biology Study Notes

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