Honors biology chapter 7 section 2 eukaryotic cell structure
Download
1 / 34

Honors Biology Chapter 7 Section 2 Eukaryotic Cell Structure - PowerPoint PPT Presentation


  • 75 Views
  • Uploaded on

Honors Biology Chapter 7 Section 2 Eukaryotic Cell Structure.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Honors Biology Chapter 7 Section 2 Eukaryotic Cell Structure' - washi


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Honors biology chapter 7 section 2 eukaryotic cell structure

Honors BiologyChapter 7 Section 2Eukaryotic Cell Structure

SC B -2.2: Summarize the structures & functions of organelles found in a eukaryotic cell(including the nucleus, mitochondria, chloroplasts, lysosomes, vacuoles, ribosomes, endoplasmic reticulum [ER], golgi apparatus, cilia, flagella, cell membrane, nuclear membrane, and cytoplasm


Cytoplasm
Cytoplasm

Portion of the cell including everything inside cell membrane except nucleus

Cytosol: liquid portion of cytoplasm


Nucleus
NUCLEUS

  • Contains DNA with its coded instructions for making proteins so is the “control center”

  • most prominent structure seen with light microscope

  • Parts:

    • Nucleolus

    • Nuclear Envelope

    • Nuclear Pores


Nucleus1
NUCLEUS

  • Nucleolus

    • dense region in nucleus

    • produces subunits of ribosomes

  • Nuclear Envelope

    • dbl membrane surrounding nucleus

    • Outer layer contiguous with ER

  • Nuclear Pores

    • holes thru envelope

    • substances enter/leave nucleus thru these pores


Dna in nucleus
DNA in NUCLEUS

chromatin: DNA bound to proteins (called histones)

Chromatin condenses into chromosomes when cell starts cell division


Ribosomes
RIBOSOMES

  • assembly site for proteins

  • 2 subunits

    • Small

    • Large

    • made separately in nucleolus  exit nucleus thru nuclear pores  join when making proteins


Ribosomes1
RIBOSOMES

Considering the function of ribosomes…. What types of cells do you think would have an abundance of ribosomes in them?


Endoplasmic reticulum er
Endoplasmic Reticulum (ER)

Internal membrane system

2 types:

Smooth ER (SER)

Rough ER (RER)


SER

  • make membranes for

    • cell membrane

    • other organs

  • detoxifies

    • drugs

    • alcohol

    • poisons


SER

So… considering the functions of SER……what types of cells can you predict might have an abundance of SER?


RER

“rough” because outer membrane is studded with ribosomes

proteins made & released into RER where they are modified (sugar groups added making a glycoprotein)

most of proteins made here are destined for export out of cell


RER

What type of cell do you think would have lots of RER?


Golgi apparatus
GOLGI APPARATUS

stack of curved membranes

usually found between ER and cell membrane

Function: modify, sort, & package material received from ER  storage in cell or export out of cell



Golgi1
GOLGI

In what types of cells do you think there would be an abundance of Golgi bodies?


Lysosomes
LYSOSOMES

  • membrane bound vesicle that has enzymes inside

  • Function: breakdown of macromolecules into smaller molecules which are then recycled in cytoplasm

    • Where do these macromolecules come from?


Lysosomes1
Lysosomes

  • Where do lysosomes get the macromolecules?

    • worn out organelles

    • engulfed bacteria or cell debris


Vacuoles
VACUOLES

membrane bounded storage facility

Protists (one-celled organisms) put food particles in a food vacuole until need the nutrients

plant cells have distinctive large central vacuole that stores water and some nutrients and helps plant maintain turgor when all cells have a filled central vacuole




Mitochondria
MITOCHONDRIA

  • convert chemical energy in sugars ATP (high energy molecule that temporarily stores energy in form cells can use) = cellular respiration

  • dbl membrane

    • intermembrane space

    • cristae : folds of inner membrane

    • matrix: inside folds of cristae

  • has own DNA (maternal) & divides on own




Chloroplasts
CHLOROPLASTS

  • in plant cells

  • capture energy in sunlight chemical energy (photosynthesis)

  • dbl membrane

    • intermembrane space

    • inner membrane folds into thylakoid discs

    • stack of discs = granum

    • space around grana = stroma

  • contain chlorophyll

  • + DNA & divides on own





Cytoskeleton
CYTOSKELETON

  • Function:

    • internal structure & support

    • movement of organelles & chromosomes

    • anchors organelles and cells

      Made of proteins

      3 types:

    • microfilaments

    • intermediate filaments

    • microtubules


Microfilaments
MICROFILAMENTS

made of actin

supports cell shape

used by protist for movement

http://highered.mcgraw-hill.com/sites/9834092339/student_view0/chapter4/animation_-_cytoplasmic_streaming.html



Intermediate filaments
Intermediate Filaments

used to move organelles around cytoplasm


Microtubules
MICROTUBULES

largest, strongest

shaped like hollow straws with units that spontaneously come together or fall apart

used to move organelles, chromosomes

made in centrosomes


Cell analogy
CELL ANALOGY

  • Eukaryotic cells are like a city:

    • each part has a job to be done

    • Nucleus : mayor

    • Mitochondria: power plant

    • Lysosomes: city dump and recycling center

    • SER: hospital

    • Golgi: UPS store

    • Cytoskeleton: roads & bridges

    • Cell Membrane: border patrol @ city limits


ad