Osmosis

Rating:

No votes yet

Tags:

mitosis

metabolism

You are allowed 3?X 5? ?cheat?/index card (both sides) Format: ~110 ABCD 3 Problems (rule of 70, ? live, organic diagram drawing 2 Essays, chosen from a menu of ~6 EC estimated score, question bank, max of 4% 1 Biology and Science- key terms, what is life and how did it get started? ...the cell basics of scientific method and terms applied to it 15 Evolution- evidence and key terms, purpose of sex Lamarck vs Darwin (acquired vs selected) Darwin vs Gould (gradualism vs punctuated equilibrium- fitness and luck) 16 Populations- species as a group concept, sex and variation, speciation, 17 Earth History- Timeline ?qualitative? knowledge of ?greatest hits? (timeline handout) Primates- up into the trees to form primates and as apes coming

Cell Membrane

Subject:

Rating:

No votes yet

Tags:

Membrane biology

Cell membrane

Facilitated diffusion

Cytosol

Cell Membrane Fluid Mosaic Model: Cell membranes consist of a fluid formed by a phospholipid bilayer and a ?mosaic?, or patchwork, of proteins Phospholipid: Polar and hydrophilic head, nonpolar and hydrophobic fatty acid tail Cell membrane also called plasma membrane Outside the membrane there is interstitial fluid, which is a salty liquid Inside the membrane there is the cytosol, which is mostly water. The cytosol is also the water portion of the cytoplasm Phospholipid bilayer: Formed since the hydrophilic heads form hydrogen bonds with water, causing the heads to face the water on either side. Since the fatty acid tails are hydrophobic, they cluster together within the bilayer

AP Bio Unit Objectives (Chapter 8)

Subject:

Rating:

No votes yet

Tags:

Semipermeable membrane

Exocytosis

Cell membrane

Membrane transport

Chapter 8: Membrane structure and function Membrane Structure Membrane models have evolved to fit new data Membranes are fluid Membranes are mosaics of structure and function Membrane carbohydrates are important for cell-cell recognition Traffic across membranes A membranes molecular organization results in selective permeability Permeability of the lipid bilayer Transport proteins Passive transport is diffusion across a membrane Osmosis is the passive transport of water Cell survival depends on balancing water uptake and loss Water balance of cells without walls Water balance of cells with walls Specific proteins facilitate the passive transport of water and selected solutes Active transport is the pumping of solutes against their gradients

enzyme lab

Subject:

Rating:

No votes yet

Tags:

Chemistry

Cell Biology

Potato

Tonicity

Enzyme

Lysis

Catalysis

Osmotic pressure

Properties of water

water

Potato Osmosis Biology SL - ATh INVESTIGATION ?Potato Osmosis? INTRODUCTION Osmosis is a process that occurs at a cellular level that entails the spontaneous net movement of water through a semi-permeable membrane from a region of low solute concentration to an area of high solute concentration in order to equalize the level of water in each region. Involved in this process are hypotonic, hypertonic and isotonic solutions. A hypotonic solution is one with a lower osmotic pressure, indicating that the net movement of water moves into the said solution whereas a hypertonic solution is one with a higher osmotic pressure, thus the net movement of water will be leaving the hypertonic solution. Lastly, an isotonic solution entails no net

Analyses of first AP Labs

Subject:

Rating:

No votes yet

Tags:

Enzyme

Semipermeable membrane

AP Bio Lab 2

Analyses Osmosis and Diffusion Osmosis and Diffusion are processes of passive transport. In this lab we studied the basic concepts of molecular movement in solutions. During the execution of the experiment, I became aware that molecules are in constant motion and tend to move from areas of higher concentration to those of lower concentration. Diffusion is the movement of molecules following that concentration gradient. It occurs on the diverse states of matter. Osmosis refers to the specialized diffusion of molecules of water through a selectively permeable membrane.

AP Biology: Lab 1 Example

Subject:

Rating:

No votes yet

Tags:

Starch

Sucrose

Glucose

lab

Contents Initial Mass Final Mass Mass Difference Percent of Change in Mass Average Change in Mass for Repeated Contents 0.0 M Distilled Water 7.04 8.15 +1.11 +15.76% 0.2M Sucrose 9.47 9.79 +0.32 +3.37% +2.08% 0.2M Sucrose 8.85 8.93 +0.07 +0.79% +2.08% 0.4M Sucrose 9.75 9.50 -0.25 -2.56% -2.41% 0.4M Sucrose 7.05 6.89 -0.16 -2.26% -2.41% 0.6M Sucrose 6.96 4.80 -2.16 -31.03% 0.8M Sucrose 13.50 9.50 -4.00 -29.62% 1.0M Sucrose 4.98 3.52 -1.46 -29.31% DATA Potato Core Data In Sucrose Solutions Assigned Questions Which substances are entering the bag and which are leaving the bag?

Diffusion Worksheets

Subject:

Rating:

No votes yet

Tags:

AP Biology James Pre-Lab: Diffusion and Osmosis in Model Systems In parts 1 and 2 of this lab, you will have the opportunity to investigate the processes of diffusion and osmosis in model membrane systems. You will also investigate the effect of solute concentration on water potential as it relates to living plant tissues. Objectives: At the completion of this AP laboratory, you should be able to: Describe the mechanisms of diffusion and osmosis. Describe how solute size and molar concentration affect the process of diffusion through a selectively-permeable membrane. Describe the relationship between solutions that are hypotonic, hypertonic, or isotonic. Design an experiment to demonstrate water potential.

AP Bio: Potato Osmosis Lab Report

Subject:

Rating:

No votes yet

Tags:

Sucrose

#AP Biology #AP Bio #Biology

Molar concentration

Potato

concentration

Mass

As visible from the data presented in the table and graph, the mass change in percent seems to decrease as the sucrose concentration increases. There seems to be minimal percent change of mass between 0.7M and 0.8M. Conclusions/Discussion After carefully recording data, we extrapolated that there is an inverse relationship between sucrose concentration and mass change. The inverse relationship is that as sucrose concentration increases, the mass change will decrease. By the conclusion, it was also concluded that the color-coded solutions had molarities of: Yellow= 0.2M Blue= 0.4M Clear= 0.6 Pink= 0.8M Green= 1M The hypothesis was supported by this conclusion.

AP Biology Diffusion and Osmosis Lab Report 2

Subject:

Rating:

No votes yet

Tags:

diffusion

Chemistry

Food and drink

Agar

Gels

Dialysis tubing

Celery

matter