Q: Which equation best represents the process of cellular respiration occurring in mitochondria?

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

Question 1

Which of the following best explains why electron microscopes have higher resolving power than light microscopes?

Accepted Answer

Electron microscopes use electrons with shorter wavelengths than visible light, allowing for greater resolution.

Question 2

A scientist observes a cell with the following features: a plasma membrane, ribosomes, and a nucleoid region, but no membrane-bound organelles. Which type of cell is being observed?

Accepted Answer

Prokaryotic cell

Question 3

Which structure is present in plant cells but absent in animal cells, and is primarily responsible for maintaining cell shape and preventing osmotic lysis?

Accepted Answer

Cell wall

Question 4

Compare the function of the rough endoplasmic reticulum (RER) and the smooth endoplasmic reticulum (SER) in eukaryotic cells.

Accepted Answer

RER synthesizes proteins for secretion, while SER synthesizes lipids and detoxifies chemicals.

Question 5

Which organelle is most directly involved in the endosymbiotic theory, and what evidence supports this theory?

Accepted Answer

Mitochondria; they contain their own circular DNA and double membranes similar to prokaryotes.

Question 6

A mutation causes a cell to lack functional nuclear pores. Which process would be most directly affected?

Accepted Answer

Transport of mRNA from the nucleus to the cytoplasm

Question 7

Which of the following correctly matches a cytoskeletal fiber with its primary function?

Accepted Answer

Microtubules: provide tracks for organelle movement and are involved in cell division

Question 8

A cell is observed to have many tight junctions. What is the most likely function of this cell in a tissue?

Accepted Answer

Preventing leakage of extracellular fluid between adjacent cells

Question 9

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

Accepted Answer

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

Question 10

Which of the following structures is found in both prokaryotic and eukaryotic cells?

Accepted Answer

Ribosomes

Question 11

A patient has a genetic disorder affecting the function of lysosomes. Which symptom is most likely to be observed?

Accepted Answer

Accumulation of undigested cellular waste

Question 12

Which cell junction allows the passage of ions and small molecules directly between adjacent animal cells?

Accepted Answer

Gap junctions

Question 13

Which of the following best describes the role of the Golgi apparatus in the endomembrane system?

Accepted Answer

It modifies, sorts, and packages proteins and lipids for secretion or delivery to other organelles.

Question 14

A cell is observed to have a large central vacuole, chloroplasts, and a cell wall. Which type of cell is this most likely to be?

Accepted Answer

Plant cell

Question 15

Which of the following statements about mitochondria and chloroplasts is most consistent with the endosymbiotic theory?

Accepted Answer

Both organelles contain their own DNA and ribosomes, similar to prokaryotes.

Question 16

Which structure is responsible for the movement of cilia and flagella in eukaryotic cells?

Accepted Answer

Microtubules arranged in a 9+2 pattern

Question 17

A researcher is studying the transport of newly synthesized proteins from the rough ER to the plasma membrane. Which pathway best describes this process?

Accepted Answer

Rough ER → Golgi apparatus → transport vesicle → plasma membrane

Question 18

Which of the following is a function of the extracellular matrix (ECM) in animal cells?

Accepted Answer

Providing structural support and regulating cell behavior

Question 19

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

Accepted Answer

Eukaryotic cells have membrane-bound organelles, while prokaryotic cells do not.

Question 20

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

Accepted Answer

Synthesizing proteins for export

Cell Structure and Function: Study Notes for General Biology

Guida di studio - Domande di pratica

Study guide - Flashcard