IB Biology Expectations

Unit 1-Statistical analysis

Calculate mean and standard deviation

Unit 2 – Cell Theory

2.1.1	Outline the cell theory.
2.1.2	Discuss the evidence for the cell theory.
2.1.4	Compare the relative sizes of molecules, cell membrane thickness, viruses, bacteria, organelles and cells, using the appropriate SI unit.
2.1.5	Calculate the linear magnification of drawings and the actual size of specimens in images of known magnification.
2.1.6	Explain the importance of the surface area to volume ratio as a factor limiting cell size.
2.4.1	Draw and label a diagram to show the structure of membranes.
2.4.2	Explain how the hydrophobic and hydrophilic properties of phospholipids help to maintain the structure of cell membranes.
2.4.3	List the functions of membrane proteins.

Eubacteria

2.1.3	State that unicellular organisms carry out all the functions of life.
2.2.1	Draw and label a diagram of the ultrastructure of Escherichia coli (E. coli) as an example of a prokaryote.
2.2.2	Annotate the diagram from 2.2.1 with the functions of each named structure.
2.2.3	Identify structures from 2.2.1 in electron micrographs of E. coli.
2.2.4	State that prokaryotic cells divide by binary fission.

Eukaryotes

2.1.7	State that multicellular organisms show emergent properties.
2.1.8	Explain that cells in multicellular organisms differentiate to carry out specialized functions by expressing some of their genes but not others.
2.3.1	Draw and label a diagram of the ultrastructure of a liver cell as an example of an animal cell.
2.3.2	Annotate the diagram from 2.3.1 with the functions of each named structure.
2.3.3	Identify structures from 2.3.1 in electron micrographs of liver cells.
2.3.4	Compare prokaryotic and eukaryotic cells.
2.3.5	State three differences between plant and animal cells.
2.3.6	Outline two roles of extracellular components.
2.4.7	Explain how vesicles are used to transport materials within a cell between the rough endoplasmic reticulum, Golgi apparatus and plasma membrane.
2.4.8	Describe how the fluidity of the membrane allows it to change shape, break and re-form during endocytosis and exocytosis.
D.1.8	Discuss the endosymbiotic theory for the origin of eukaryotes.

What You Need to Know

Introduction to Cells

Know the common metric units and prefixes used in biology.

Know the relative sizes of biological structures.

State and explain the three parts of the cell theory.

Know the structure of the phospholipid molecule

Compare hydrophilic and hydrophobic

Contrast the fluidity, structure and source of saturated and unsaturated fatty acids.

Describe the role of cholesterol in membrane fluidity.

Identify structures on a diagram of the membrane, including the phospholipid head, tails, cholesterol, integral proteins and peripheral proteins.

Explain the roles of membrane bound proteins in the cell.

Calculate surface area and volume of a cube.

Explain the relationship between surface area and volume of a cell as a limiting factor of cell size.

List cellular adaptations for increasing surface area

Eubacteria

How is total magnification calculated?

What is field of view and how is it calculated?

How can you estimate the size of an object under the microscope?

Distinguish between magnification and resolving power.

Describe how to determine how much larger a biological drawing is compared to “real life” (linear magnification)

Draw and/or label the different shapes of prokaryotic cells

Identify and know the functions of the following structures of a prokaryotic cell

Cell Membrane

Nucleiod

Plasmid

Cytoplasm

Ribosome

Cell wall

Pili

Capsule

Flagella

Describe the shape of prokaryotic DNA (circular and naked).

Describe the steps of binary fission

Eukaryotes

Compare prokaryotic and eukaryotic cells.

Identify and know the functions of the following structures of a eukaryotic cell

o        Rough ER

o        Cell membrane

o        Cytoplasm

o        Golgi

o        Mitochondria

o        Nuclear envelope

o        Nucleus

o        Nucleolus

o        Smooth ER

o        Lysosome

o        Flagella

o        Cilia

o        Vesicle

o        Ribosome

o        Cytoskeleton

Know three differences between plant and animal cells.

Outline two roles of extracellular components.

Explain how the structures of the endomemebrane system vesicles are used to create and transport materials within and out of a cell.

Compare the ultimate destination of proteins made by free ribosomes and bound ribosomes

Describe the evidence for the endosymbiotic theory for the origin of eukaryotes.

Source – http://biologyforlife.com/Units/Year%201/Cell%20structure%20and%20function/cell%20structure_function.htm

Not teaching Science anymore!!

Dear all,

Due to more administration duties and the appointment of a full time Science teacher I am not teaching Science anymore.

I am now teaching IGCSE Geography and Middle School Social Sciences.

You could still contact me should you have any questions, by leaving a comment.

Take care,

Jacques

MS 1 – Humans as organisms.

MS 1 has started their inquiry into humans as organisms. The last couple of weeks we have looked at cells and one cellular organisms, comparing them to multi-cellular organisms. MS 1 will study different human systems in the next term.

MS 1 need to choose a autonomous project related to human beings, being well-functioning organisms. They are expected to write a research essay (minimum 1200 words) or perform and write up an investigation or built a model (with an accompanying report) explaining a human system of their choice.

 

MS 2: Electricity – Autonomous work

 

MS 2 has started their new science unit last week. We will look at:

Separating a mixture of different liquids.

 MS 3 has attempted today to seperate a mixture that contains 50 ml of water, 50 ml of ethanol and 50 ml of cooking oil. They had some wonderful ideas which they tried out and built their own distillation chambers using boiling tubes with side arms, plastic bottles, ice water and tubing.

Unfortunately we ran out of time and the investigation could not be completed. LP’s will brain storm ideas to see how they can improve their self-made distillation equipment. 

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