Cell Biology Quiz: Cell Cycle and Cancer

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Questions and Answers

What is the primary function of the G1 phase in the cell cycle?

  • DNA is duplicated to prepare for cell division.
  • The cell performs its regular functions and grows. (correct)
  • Cell organelles are degraded in preparation for division.
  • The cell enters a resting phase and remains inactive.

Which statement accurately describes apoptosis?

  • A process solely responsible for cellular growth.
  • Cell death that occurs only due to viral infections.
  • A random and uncontrolled process of cell death.
  • The regulated and controlled death of a cell. (correct)

What occurs during the S phase of the cell cycle?

  • The cell enters a resting phase and halts its activities.
  • The DNA is replicated to ensure identical cell division. (correct)
  • The cell synthesizes proteins necessary for division.
  • The chromosomes condense to prepare for cytokinesis.

In which phase do cells primarily perform their normal functions and prepare for potential replication?

<p>G1 phase (A)</p> Signup and view all the answers

What limits the maximum size a cell can achieve during growth?

<p>Limitations in communication within the cell. (B)</p> Signup and view all the answers

Which characteristic is not typically associated with malignant tumours?

<p>They form a distinct boundary around themselves. (A)</p> Signup and view all the answers

In the context of cancer development, what does metastasis refer to?

<p>The process of spreading cancer cells to other parts of the body. (A)</p> Signup and view all the answers

What is a common characteristic of abnormal cancer cells?

<p>Disorganized arrangement of chromosomes. (D)</p> Signup and view all the answers

Which treatment option specifically involves modifying the body's immune response to fight cancer?

<p>Immunotherapy (D)</p> Signup and view all the answers

Which of the following methods is primarily used to determine the stage of cancer?

<p>Imaging tests (B)</p> Signup and view all the answers

Which structure is produced in the nucleolus?

<p>Ribosomes (A)</p> Signup and view all the answers

What is the primary function of the smooth endoplasmic reticulum?

<p>Lipid synthesis (B)</p> Signup and view all the answers

What distinguishes the rough endoplasmic reticulum from the smooth endoplasmic reticulum?

<p>Presence of ribosomes (B)</p> Signup and view all the answers

What does the Golgi apparatus primarily consist of?

<p>Folded membranes and vesicles (D)</p> Signup and view all the answers

Which organelle is involved in energy production and has a double-membrane structure?

<p>Chloroplast (B)</p> Signup and view all the answers

What is the function of the central vacuole found in plant cells?

<p>Storage of fluids (D)</p> Signup and view all the answers

Which of the following statements about chloroplasts is true?

<p>They are green due to chlorophyll. (A)</p> Signup and view all the answers

Which structure acts as a barrier that surrounds the nucleus?

<p>Nuclear envelope (D)</p> Signup and view all the answers

What is the primary function of the plasma membrane in a cell?

<p>It protects the cell and regulates substance movement. (C)</p> Signup and view all the answers

Which statement correctly describes the cytoplasm?

<p>It is a gel-like material that supports organelles and nutrients. (A)</p> Signup and view all the answers

Which of the following statements aligns with the cell theory?

<p>All living things are composed of one or more cells. (C)</p> Signup and view all the answers

What is the main control center of a cell, often referred to as the brain of the cell?

<p>Nucleus (A)</p> Signup and view all the answers

Which component is NOT part of the cell's structural elements?

<p>Cell wall (C)</p> Signup and view all the answers

Which characteristic is NOT attributed to the plasma membrane?

<p>It allows diffusion of all substances. (A)</p> Signup and view all the answers

How does the cytoplasm contribute to cellular function?

<p>By providing a medium for biochemical reactions. (D)</p> Signup and view all the answers

What surrounds the nucleus and provides an additional layer of protection?

<p>Nuclear envelope (B)</p> Signup and view all the answers

Which characteristic is unique to ionic compounds when compared to covalent compounds?

<p>Form solid crystals at room temperature (A)</p> Signup and view all the answers

In the context of nomenclature, which statement is true for naming covalent compounds?

<p>Use of prefixes to denote the number of atoms (A)</p> Signup and view all the answers

What is a defining property of acids based on the pH scale?

<p>Have lower pH values than 7 (C)</p> Signup and view all the answers

Which type of mirror can produce a virtual image that is upright and larger than the object?

<p>Concave mirror (B)</p> Signup and view all the answers

Which reaction type involves an exchange of ions resulting in the formation of new compounds?

<p>Double displacement reaction (D)</p> Signup and view all the answers

What phenomenon occurs when light passes from one medium to another at an angle?

<p>Refraction (A)</p> Signup and view all the answers

Which statement about the Law of Conservation of Mass is accurate in chemical reactions?

<p>The total mass of reactants equals the total mass of products. (D)</p> Signup and view all the answers

Which factor does NOT affect the rate of chemical reactions?

<p>Color of reactants (B)</p> Signup and view all the answers

What is the primary cause of total internal reflection in light waves?

<p>Incident light angle exceeds the critical angle (B)</p> Signup and view all the answers

Which property most distinguishes thermal energy produced by LED lights from other types of light production?

<p>LEDs convert more electrical energy into light than heat. (D)</p> Signup and view all the answers

During which stage of mitosis do the spindle fibres align chromosomes along the middle of the cell?

<p>Metaphase (D)</p> Signup and view all the answers

What occurs during telophase in the process of mitosis?

<p>Chromosomes arrive at opposite poles (A)</p> Signup and view all the answers

Which type of tissue in animals is responsible for transmitting signals?

<p>Nervous tissue (A)</p> Signup and view all the answers

What is a primary function of xylem tissue in plants?

<p>Transporting water and minerals (D)</p> Signup and view all the answers

Which stem cells can differentiate into any type of cell during the embryonic stage?

<p>Embryonic stem cells (A)</p> Signup and view all the answers

What characterizes meristematic tissue in plants?

<p>Consists of unspecialized cells for growth (D)</p> Signup and view all the answers

In which phase are sister chromatids pushed apart by spindle fibres?

<p>Anaphase (B)</p> Signup and view all the answers

Which of the following provides strength and support in plant stems?

<p>Ground tissue (D)</p> Signup and view all the answers

What happens during cytokinesis in animal cells?

<p>Cell membrane pinches in at equator (C)</p> Signup and view all the answers

Which type of plant tissue is primarily responsible for photosynthesis?

<p>Ground tissue (B)</p> Signup and view all the answers

What mechanism leads to the formation of cancer cells?

<p>Mutation in DNA instructions (B)</p> Signup and view all the answers

Which of the following is NOT a characteristic of adult stem cells?

<p>Can differentiate into multiple cell types (A)</p> Signup and view all the answers

What type of cell makes up the outer protective covering of a leaf?

<p>Epidermal tissue cells (B)</p> Signup and view all the answers

Flashcards

Cell Theory

All living organisms are composed of one or more cells, cells are the basic structural and functional unit of all living organisms, and all new cells arise from preexisting cells.

Plasma Membrane

The boundary of a cell, selectively permeable, meaning it controls what enters and exits the cell.

Cytoplasm

Jelly-like substance that fills the space between the plasma membrane and the nucleus.

Nucleus

The control center of the cell, containing DNA, which directs the cell's activities.

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Organelles

Tiny structures within the cell, each with a specific function.

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Plasma Membrane Structure

A double layer of phospholipids that forms a barrier around the cell. It is selectively permeable.

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Cytoplasm Function

The cytoplasm allows for the movement of materials within the cell. It contains nutrients and helps to support cell organelles.

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Nucleus Function

The nucleus contains the DNA, which is the genetic information that directs all the cell's activities.

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Cell Division

The process by which a cell divides into two identical daughter cells.

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Interphase

The phase of the cell cycle where the cell grows, replicates its DNA, and prepares for division.

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G1 Phase

The first growth phase of interphase, during which the cell increases in size and produces new organelles.

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S Phase

The phase of interphase where the cell duplicates its DNA, ensuring each daughter cell receives a complete set.

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G2 Phase

The second growth phase of interphase, allowing the cell to produce more organelles and structures needed for division.

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Nuclear Envelope

A double membrane surrounding the nucleus with pores that allow passage of molecules.

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Ribosomes

Small structures produced in the nucleolus, involved in protein synthesis. They can be bound to the ER or freely floating in the cytoplasm.

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Rough Endoplasmic Reticulum (RER)

A network of folded membranes with ribosomes attached, involved in protein synthesis and modification.

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Smooth Endoplasmic Reticulum (SER)

A network of folded membranes without ribosomes, involved in lipid synthesis, detoxification, and calcium storage.

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Golgi Apparatus

A stack of folded membranes and vesicles near the ER, involved in processing and packaging proteins and lipids.

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Mitochondria

A double-membrane organelle with folded inner membranes, responsible for cellular respiration and energy production.

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Chloroplast

A double-membrane organelle found in plant cells, responsible for photosynthesis. Contains chlorophyll which gives it a green color.

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Cancerous Cells

Abnormal cells that grow and divide uncontrollably, often forming a mass known as a tumor.

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Benign Tumor

A non-cancerous tumor that does not spread to other parts of the body. They usually grow slowly and are often easily removed.

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Malignant Tumor

A cancerous tumor that can spread to other parts of the body through blood or lymphatic vessels. These tumors can be life-threatening.

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Metastasis

The spread of cancer cells from the original tumor to other parts of the body.

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Tumor

A cluster of abnormal cells that grow and divide uncontrollably without a clear boundary, often the first stage of tumor development.

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Mitosis

The process where a parent cell divides to produce two identical daughter cells.

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Prophase

The first stage of mitosis, where the chromatin condenses into chromosomes, the nuclear membrane breaks down, and the spindle fibers develop.

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Metaphase

The stage of mitosis where the chromosomes line up along the middle of the cell, ensuring they will split evenly.

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Anaphase

The stage of mitosis when the sister chromatids are pulled apart by spindle fibers and move to opposite poles of the cell.

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Telophase

The final stage of mitosis where the chromosomes arrive at opposite poles, the nuclear membrane reforms, and the chromosomes uncoil.

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Cytokinesis

The process that divides the cytoplasm of a cell after mitosis, resulting in two daughter cells.

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Specialized cells

Cells specialized to perform specific functions in an organism and have distinctive structures and properties.

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Stem cells

Undifferentiated cells that can differentiate into various specialized cell types.

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Epithelial tissue

Tissue that lines surfaces and protects organs.

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Connective tissue

Tissue that provides strength, protection, and connection between cells and tissues.

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Muscle tissue

Tissue that allows movement.

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Nervous tissue

Tissue that receives and transmits signals throughout the body.

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Meristematic tissue

Unspecialized cells found throughout plants that enable growth of new parts.

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Epidermal tissue

Tissue that forms the outer protective layer in plants.

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Ground tissue

Tissue that provides support, storage, and photosynthesis in plants.

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Covalent Bond

A type of chemical bond formed when two or more nonmetals share electrons.

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Ionic Bond

A type of chemical bond formed when a metal atom loses an electron to a nonmetal atom, resulting in oppositely charged ions that are then attracted to each other.

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Atom

The smallest unit of an element that retains the chemical properties of that element.

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Cation

A positively charged ion formed when an atom loses one or more electrons.

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Anion

A negatively charged ion formed when an atom gains one or more electrons.

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Decomposition Reaction

A chemical reaction where a single reactant breaks down into two or more products.

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Synthesis Reaction

A chemical reaction where two or more reactants combine to form a single product.

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Single Displacement Reaction

A chemical reaction where a more reactive element replaces a less reactive element in a compound.

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Double Displacement Reaction

A chemical reaction where two reactants exchange ions, resulting in the formation of two new compounds.

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Combustion Reaction

A chemical reaction that involves the rapid reaction between a substance with oxygen, often producing heat and light.

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Study Notes

Cell Theory

  • All living things are made up of one or more cells
  • The cell is the simplest unit that carries out all life processes
  • All cells come from other cells

Cell Organelles - Animal Cell

Plasma Cell Membrane

  • Selectively permeable border of the cell
  • Composed of a double layer of phospholipids
  • Forms a protective barrier around the cell
  • Allows different substances to move through it

Cytoplasm

  • Gel-like material
  • Helps different substances move through it

Nucleus

  • Contains genetic information
  • Surrounded by nuclear envelope
  • Controls all activities in a cell
  • Involved in DNA replication, transcription, and RNA processing
  • Protects organelles

Nucleolus

  • Darker structure within the nucleus
  • Produces and assembles the cell's ribosomes

Nuclear Envelope (membrane)

  • Double membrane with nuclear pores
  • Protects and separates the contents of the nucleus

Ribosome

  • Produced in the nucleolus
  • Can be bound to the ER or freely floating in the cytoplasm
  • Involved in protein synthesis

Centrioles

  • Cylindrical structure of 9 triplets of tubes
  • Always exist as a pair
  • Help with cell division and organize microtubules

Rough Endoplasmic Reticulum

  • Folded interconnected membrane
  • Covered in ribosomes
  • Extends from nuclear envelope
  • Folds and packages proteins for transport

Smooth Endoplasmic Reticulum

  • Folded interconnected membrane
  • No ribosomes
  • Extends from the nuclear envelope
  • Produces fats and oils
  • Detoxifies drugs and toxins

Golgi Apparatus

  • Folded interconnected membranes and vesicles near ER
  • Involved in transport

Mitochondria

  • Double membrane structure
  • Inner membrane folds to increase surface area
  • The innermost cavity is the matrix
  • Converts chemical energy in sugars to energy the cell can use

Vacuole

  • Fluid-filled sacs
  • Stores food, waste, and water

Vesicle

  • Small cellular containers
  • Transports materials

Lysosome

  • Contains digestive enzymes
  • Breaks down nutrients
  • Breaks down excess/worn-out cell parts

Cell Wall (Plant Cells Only)

  • A rigid wall
  • Provides support and protection

Cytoplasm (Plant Cells)

  • Gel-like material
  • Contains water and dissolved minerals
  • Contains organelles

Chloroplasts

  • Double membrane structure
  • Inner membrane folds to increase surface area
  • The innermost cavity is called the stroma
  • Site of photosynthesis

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