Mitosis and stem cells
What are the phases of mitosis in order
Interphase, prophase, metaphase, anaphase, telophase
What bases of DNA are paired together
A-T, C-G
What is the age of Ardi
4.4 million years old
What organisation defines health as complete physical, mental and social wellbeing
World health organisation
What is the fastest rate of reaction called for enzymes
Optimum
what 3 things is mitosis for
Growth, repair, asexual reproduction
What is the shape of DNA
double helix
How did stone tools change over time
Git sharper/more refined
Define a communicable disease
A disease that can be spread from person to person
What happens if the pH for enzyme is too high or low
Enzyme is denatured
What does mitosis produce
2 diploid daughter cells
what are the bonds which hold DNA togeter
Hydrogen bonds
State some uses of stone tools
Fire, make clothes, hunting, make other tools
What cells are destroyed when someone has HIV
White blood cells
Explain why an enzyme being denatured slows down the rate of reaction
Active site changes shape, cannot fit substrate and make E-S complexes
What is a stem cell
An undifferentiated cell
What does meiosis produce
sperm and egg/ 4 haploid cells
Skull volume increased, posture more upright, shorter arms, tools got sharper
Name the 4 types of pathogens
Virus, bacteria, fungus, protist
Name a control variable in the enzyme core practical
Temperature, concentration of starch solution, concentration of amylase solution,
What is the region of a plant where mitosis will rapidly occur
Meristem
Explain how we get DNA from fruit
Crush it, add salt and washing up liquid, then add ethanol
Explain the steps of antibiotic resistance
Some are naturally resistant
If you dont take full course of antibiotics
Some survive, breed, pass on genes
Soon whole population would be resistant
Explain how a vaccine works
Injected with dead form of disease
Lymphocytes detect antigens
Lymphocytes produce antibodies
Creates memory lymphocytes
Explain why the iodine stops changing colour in the core practical