Random questions Flashcards
What is osmosis? (3)
What is osmosis? (3)
movement of water (1)
from high concentration (of water) to low concentration (of water) (1)
through a selectively permeable membrane (1)
Why do we calculate ratios or percentages with data? (2)
Why do we calculate ratios or percentages with data?
for easier comparison (1)
because different groups have different starting masses (1)
Why do we take a large sample size? (1)
Why do we take a large sample size?
more representative
Why do we take random samples?
Why do we take random samples?
avoid bias
Why do we take repeats?
Why do we take repeats?
identify anomalous results and calculate a reliable mean
Why do we have controls?
Why do we have controls?
to see that what we are testing (e.g. drug) is causing the effect
How do we treat control groups
How do we treat control groups
treat exactly the same but do not give the drug, give a placebo
What are biological molecules?
What are biological molecules?
molecules made and used by living organisms e.g. Carbohydrates, Proteins, Lipids
What are the functions of carbohydrates? (3)
What are the functions of carbohydrates?
energy source (glucose in respiration)
energy store (starch in plants, glycogen in animals)
structure (cellulose in cell wall of plants)
What are the building blocks for carbohydrates called?
What are the building blocks for carbohydrates called?
monosaccharides
Example of monosaccharides?
Example of monosaccharides?
glucose (alpha and beta), galactose, fructose
Formula for monosaccharides?
Formula for monosaccharides?
C6 H12 O6
Difference between alpha and beta glucose?
Difference between alpha and beta glucose?
on Carbon 1, alpha glucose has a OH group on the bottom
beta glucose has a OH group on the top
How are monosaccharides joined together?
How are monosaccharides joined together?
condensation reaction (removing water) – between 2 OH groups
Bond in carbohydrate?
Bond in carbohydrate?
glycosidic bond
