In all cells, the plasma membrane controls the entry and exit of substances. It shows selective
permeability, allowing some substances to cross more easily than others.
Fluid Mosaic Model of a Biological Membrane:
The membrane surface appear
Unit 6: Human Health and Physiology
6.1 Digestion Introduction
Four main stages of food processing:
Ingestion taking in of food via the mouth.
Digestion the chemical breakdown of food.
Some substances are not suitable for use in humans (because th
2.5 Cell Division
2.5.1, 2.5.3 Cell Division
The Cell Cycle
Biochemically, an active phase of a cells life; longest part of the cell cycle.
Many metabolic activities occur during interphase.
DNA-protein complex, called chromatin, is in the f
3.2 Carbohydrates, Lipids and Proteins
3.2.1 Organic Compounds
In living systems, organic compounds include any molecules containing, carbon, except hydrogen
carbonates, carbonates, and carbon oxides.
All compounds that do not contain carbon are inorganic
3.1 Chemical Elements and Water
3.1.4 Properties of Water
Water is a polar molecule, meaning that the molecule, while overall neutral, has poles with
slightly negative charges and slightly positive charges.
Because oxygen is more electronegative than hydr
2.1 Cell Theory
2.1.1 Cell Theory & Evidence
1. Living organisms are composed of one or more cells.
o With the development of the microscope, scientists (Hooke, VanLeewenhoek)
have been able to observe cells in all living things (except: muscle fibres whi
4.1.1 State that eukaryote chromosomes are made of DNA and
Eukaryote chromosomes are made of DNA and proteins.
4.1.2 Define gene, allele and genome.
Gene: a heritable factor that controls a specific characteristic.
Allele: one specific form of a
4.1.1 State that eukaryotic chromosomes are made of DNA and protein
Eukaryotic chromosomes consist of DNA wrapped around histone proteins
This forms the basic structure of the nucleosome, which is packed together to form chromatin
(in a 'beads on a string
6.6.1 Draw and label diagrams of the adult male and female
Figure 6.6.1 - The male reproductive system
Figure 6.6.1 - The female reproductive system
6.6.2 Outline the role of hormones in the menstrual cycle, including
FSH (follicle s
Determining the Isotonic Concentration of
Sucrose in a Potato (Solanum Tuberosum)
Date: March 21, 2014
Question: What is the isotonic concentration of sucrose in potato cores?
Hypothesis: If the potato core is in a hypertonic solution compared to the envi
The Effect of Changing the Substrate Concentration of
H2O2 on the Enzyme Activity with Liver Solution
Date: April 08, 2015
By: Nayan Modi
Purpose: The purpose of this investigation is to determine the correlation between changing the