Module 2 Wrong questions Flashcards
(22 cards)
what is the wavelength of light ?
400-700nm
what is the stain sudan red used for and what is iodine used for in staining?
sudan red - lipid rich areas
iodine - cell walls yellow, starch granules blue black
how to convert from smaller to bigger units
divide
the value will alwyas be smaller in a larger unit
what is the length of mitochondrion approx
1 micrometer
what is centrioles made up of?
protein microtubules
not membrane bound
what kind of cytoskelton do bacteria have?
less developed, simpler cytoskeleton compared to eukaryotic
what is the difference between cohesion and adhesion?
Cohesion: Water is attracted to water (forms surface tension)
Adhesion: Water is attracted to other substances
what is the structure of celulose ?
straight and forms many hydrogen bonds between fibres (high tensile strength) , good substsnce for cell walls
how many amino acids combinations
20 amino acids cubed = 8000
what kind of proteins are basically all hormones
globular - roughly spherical in shape
what is formed for lipids during emulsion test?
lipids coming out of suspension and formation of droplets - forms cloudly white liquid
what is needed to go from non-reducing to reducing to carry out benedict test?
strong acids, e.g. hcl
heated to high temp to break down glycosidic bonds
what are the pyramidine and purine bases?
CUT - pyramidine - single carbon nitrogen ring
GA - purine - two carbon nirogen rings
what hydrogen bonds form between the bases?
AT - 2 hydrogen. bonds
CG- 3 hydrogen bonds
what does the RNA polymerase enzyme do?
joins RNA nucleotides to complementary DNA bases - transcription
what does amylase break and what does trypsin break?
amylase - amylose into maltose
trypsin - proteins into smaller peptides
what does a temperature coefficent of Q10 mean
each 10 degrees increase , the rate doubles
what is a cofactor?
a non protein component such as an ion required for the enzyme to fucntion
what is a coenzyme
large organic molecule required for enzyme function
all coenzymes are cofactors, but not all cofactors are coenzymes
what is a prosthetic group
non protein ion bound permenantly to protein
what is the function of glycolipids?
receptors to recongise similar cells and join with them , to cteate tissue
also allow immune system to recognise teh body’s cell
why can molecules not cross the membrane
too large-cannot fit between fatty acids or too hydrophillic - would repel from the hydrophobic core of tails
