Cell Biology Overview Quiz

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Questions and Answers

Which answer corresponds to Concept 6.4?

Answer B

Answer E

Answer A

Answer C (correct)

In which concept does Answer A appear?

Concept 6.6

Concept 7.2

Concept 6.5 (correct)

Concept 7.1

What is the correct answer for the question based on Concept 7.3?

Answer E (correct)

Answer C

Answer A

Answer D

Which option refers to the answer used in multiple questions for Concept 6.6?

Answer E Signup and view all the answers

Select the correct answer associated with Concept 7.1.

Answer C Signup and view all the answers

What is the main advantage of light microscopy over electron microscopy?

Light microscopy allows one to view dynamic processes in living cells. Signup and view all the answers

What is the primary objective of cell fractionation?

To separate the major organelles so their functions can be determined. Signup and view all the answers

Which list correctly shows the order of cellular components in the pellet during centrifugation?

Nucleus, mitochondria, ribosomes Signup and view all the answers

Why is it important to know the microscopy method used for image preparation?

To assess the likelihood of artifacts based on preparation technique. Signup and view all the answers

Which of the following is NOT part of a prokaryotic cell?

Endoplasmic reticulum Signup and view all the answers

What is the most reasonable explanation for why plant cells often have a larger volume enclosed by the plasma membrane compared to animal cells?

Plant cells utilize vacuoles for increased volume. Signup and view all the answers

What role do ribosomes play in a cell?

Protein synthesis Signup and view all the answers

Which of the following options best describes the function of a cell wall in prokaryotic cells?

To maintain the shape and integrity of the cell. Signup and view all the answers

Which type of organelle is primarily involved in the synthesis of oils, phospholipids, and steroids?

Smooth endoplasmic reticulum Signup and view all the answers

Which of the following statements correctly describes the polarity of the Golgi apparatus?

Transport vesicles fuse with one side of the Golgi and leave from the same side. Signup and view all the answers

Which of the following produces and modifies polysaccharides that will be secreted?

Golgi apparatus Signup and view all the answers

Which of the following contains hydrolytic enzymes?

Lysosome Signup and view all the answers

Which is one of the main energy transformers of cells?

Mitochondrion Signup and view all the answers

Organelles other than the nucleus that contain DNA include:

Chloroplasts Signup and view all the answers

What is the primary function of the enzymes found in peroxisomes?

Use the hydrogen to break down hydrogen peroxide Signup and view all the answers

What is a major cause of the size limits for certain types of cells?

The need for a surface area sufficient to allow the cell's function Signup and view all the answers

Which structure is NOT part of the cytoskeleton?

Mitochondria Signup and view all the answers

Which cellular structures exhibit the 9 + 2 arrangement of microtubules?

All of the above Signup and view all the answers

Which of the following organelles is specifically involved in the breakdown of fatty acids?

Peroxisome Signup and view all the answers

Which of the following matches the correct cytoskeletal element with its function?

Microtubules and chromosome movement Signup and view all the answers

What diameter do microtubules typically have?

25 nm with 15-nm lumen Signup and view all the answers

Which of the following functions is associated with microfilaments?

Formation of cleavage furrows Signup and view all the answers

Which statement about intermediate filaments is true?

They anchor organelles within the cytoplasm. Signup and view all the answers

Which process is primarily facilitated by microfilaments?

Ameboid movement Signup and view all the answers

Which statement about the dynamic function of the cytoskeleton is correct?

It is made possible by the assembly and disassembly of complex proteins. Signup and view all the answers

Which of the following best characterizes bound ribosomes?

They are typically found on the cytoplasmic surface of the rough endoplasmic reticulum. Signup and view all the answers

Which structure is not part of the endomembrane system?

Chloroplast Signup and view all the answers

What role do unsaturated fatty acids play in membrane fluidity?

They introduce kinks that help keep adjacent lipids apart. Signup and view all the answers

Which of the following statements is true about integral membrane proteins?

They can extend across the membrane and have a stable tertiary structure. Signup and view all the answers

Which statement about microtubules and microfilaments is incorrect?

Microfilaments resist tension and stretch. Signup and view all the answers

Which of the following is present in a prokaryotic cell?

Ribosome Signup and view all the answers

What is the effect of chemicals that block cytoskeletal assembly?

They have little effect on cell shape. Signup and view all the answers

Which statement accurately describes the process of diffusion?

It is a passive process in which molecules move from a region of higher concentration to a region of lower concentration. Signup and view all the answers

How does water pass quickly through the cell membranes?

It moves through aquaporins in the membrane. Signup and view all the answers

What can be deduced about celery stalk cells immersed in fresh water?

Cells are hypotonic to fresh water but hypertonic to the salt solution. Signup and view all the answers

In the U-tube experiment, which arm has the higher osmolarity?

Side A with 2 M sucrose and 1 M glucose. Signup and view all the answers

What does the movement of water in the U-tube indicate?

Water moves towards the side with higher sucrose concentration. Signup and view all the answers

What type of process describes the movement of molecules from a region of lower concentration to a region of higher concentration?

Active transport. Signup and view all the answers

Which component of the cell membrane helps in maintaining fluidity?

Cholesterol. Signup and view all the answers

Why is glucose able to move across the cell membrane despite being polar?

It moves through dedicated transport proteins. Signup and view all the answers

Study Notes

Multiple Choice Questions

Question 1: Light microscopy's advantage over electron microscopy is its ability to view dynamic processes in living cells.
Question 2: Cell fractionation aims to separate organelles for function analysis.
Question 3: Centrifugation separates cellular components based on size and density, with larger, denser components settling first.
Question 4: Understanding the microscopy method used to create an image helps interpret observed structures and potential artifacts. Knowing the specific method aids in correct interpretation of biochemical processes.
Question 5: A prokaryotic cell lacks a membrane-bound nucleus.

Question 7

The size limit of cells is due to the need for a sufficient surface area to volume ratio to facilitate cell function.

Question 8

The smooth endoplasmic reticulum synthesizes oils, phospholipids, and steroids.

Question 9

The Golgi apparatus has polarity with vesicles fusing on one side and leaving from the other. Proteins, lipids, and soluble products are modified as they travel through the Golgi.

Question 10

The Golgi apparatus produces and modifies secreted polysaccharides.

Question 11

Lysosomes contain hydrolytic enzymes.

Question 12

Mitochondria are the primary energy transformers of cells.

Question 13

Mitochondria and chloroplasts contain DNA.

Question 14

Chloroplasts convert light energy to chemical energy.

Question 15

Peroxisomes remove hydrogen from molecules, especially using enzymes to detoxify poisons and alcohol.

Question 16

The cytoskeleton consists of microfilaments, microtubules, and intermediate filaments.

Question 17

Cilia and flagella contain a 9 + 2 arrangement of microtubules.

Question 18

Microfilaments have specialized roles in cleavage furrow formation and ciliary motion. Microtubules are involved in chromosome movement.

Question 19

Microfilaments are involved in amoeboid movement and muscle contractions.

Question 20

The dynamic nature of the cytoskeleton is due to assembly/disassembly of proteins, and microtubules resist tension, while microfilaments resist compression.
Movement of cilia and flagella is driven by motor proteins.
The endomembrane system consists of various organelles involved in the production, modification, and delivery of molecules.

Question 21

Bound ribosomes synthesize membrane proteins and secretory proteins.

Question 22

Chloroplasts are not part of the endomembrane system.

Question 23

Ribosomes are present in prokaryotic cells.

Question 24

Unsaturated fatty acids help maintain membrane fluidity at lower temperatures by introducing kinks in the fatty acid tails.

Question 25

Integral membrane proteins are typically transmembrane proteins and are tightly embedded within the cell membrane.

Question 26

Diffusion is a passive process where molecules move from higher concentration to lower concentration.

Question 27

Water passes quickly through cell membranes because of aquaporins in the cell membrane.

Question 28

Celery stalks become stiff when submerged in fresh water as the cells take up water, which increases turgor pressure. In salt solutions, water moves out of cells, causing them to become limp.

Question 29

Cholesterol is a component of cell membranes, regulating fluidity and maintaining structure.

Question 30

Glycolipids are membrane components with carbohydrate groups attached, aiding in cell recognition and signaling.

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Description

Test your knowledge on cell biology concepts including microscopy techniques, cell structure, and organelle functions. This quiz covers essential topics that are pivotal for understanding cellular processes and organization. Perfect for those studying introductory cell biology or preparing for exams.