Extra biology content Flashcards
(9 cards)
Why is the Benedict’s test semi quantitative?
The colour is proportionate to the amount of reducing sugar so can be used to estimate it
What are thermophilic bacteria?
Bacteria adapted to high temperatures
Their enzymes can function above 100C
How is the DNA helix arranged?
Anti-parallel
How long does one cigarette take from your life?
10.7 minutes
What is lactose intolerence?
A human is unable to produce lactase
Microorganisms hydrolyse lactose
What is an electrocardiogram?
A trace displaying the electrical current charges of the heart
These display the waves shown by the sinatorial and atrioventricular node
What is hybridisation?
The combining of genes of different varieties or species of organisms to produce a hybrid
How is the diversity index linked to the stability of an ecosystem?
An increased index increases the stability because more members are likely to survive a change in environmental conditions
What is the lollipop method?
Lollipop shaped apparatus
Radioactive hydrogencarbonate is added
Radioactive carbon is taken up
Shows the stages of a light independent reaction
