Test Flashcards
What’s difference between muscle and muscle tissue
muscle is an organ made of different tissues
Muscle tissue is the specific tissue in a muscle that has fibres which contract to allow movement
Why can a zygote only go through mitosis not meiosis
Zygote is diploid so it has the full amount of chrosomomes half from each parent cell for this to happen it needs to through mitosis where it produces daughter cells with the same chromosome number as the parent cell. Meiosis produces haploid gametes with half the number of chrosomes and a zygote needs the full amount of chrosomes to make an embryo
How does structure of dna allow for dna replication
Talk about dna replication
Each strand acts a template for the new strand and how dna is anti parallel so
Difference between dna and ado
ADP has 2 phosphate groups and DNA has one
Adp has a ribose sugar and dna has deoxyribose sugar
What’s a gene
How does an embryonic cell become an embryo
Through cell differentiation
And Yap icl
What’s the role of universal indicator
How to draw the graph
Describe the pattern
Calc
How can original procedure be modified
Limitation
To detect if H+ ions present
SA:V on x acid and Time on y axis
As time taken for diffusion increases SA:V decreases
0.44
Use cubes of the same size
0.35/0.347
Cube a cuz
Human judgement used to see when it turns red and not equipment
E as its biggest and hardest to see
properties of glycogen starch and glucose
starch and glycogen -ejergy storag emolcules,compact and insolbule
glycogen-soluble as oys a polar molecule and it contains many hemicalo enrgy in its bonds
Explain the role of meristem tissue in a stem
undifferentiated / unspecialised, cells for growth / to repair (damaged) tissue
can differentiate into, other / named, tissues or cells
Compare prophase in mitosis with prophase in meiosis.
both have
centrioles move to opposite, poles
chromosomes consist of two (sister) chromatids
spindle (fibres) form(s)
chromosomes / chromatids, condense
nuclear, envelope breaks down
(differences):
meiosis has, prophase 1 and 2 / two prophases
homologous chromosomes pair / bivalents form /
in prophase (1)
crossing over occurs / chiasma(ta) form, in prophase (1)
whys collagen a fibrous protein
what make collagen a strong molecule
is long chain (of amino acids)
2 little / no, tertiary structure
3 insoluble / has many non-polar amino acids
4 has, only two different amino acids / only glycine and proline / a small range of amino acids
5has a structuralfunction/providesstrength(tothearterywall)
many, hydrogen bonds (between polypeptides)
many, covalent bonds / crosslinks (between collagen molecules) polypeptides overlap / polypeptides have staggered ends
Outline the method of chromatography that will separate the main amino acids in collagen.
digest / hydrolyse / break down, collagen into amino acids
and
2 place, sample / AW, on, chromatography paper / chromatography plate / stationary phase
3 dry and repeat
4 place, (chromatography) paper / (chromatography) plate/
5 additional detail
structure of rer
function of MEMBRANE OF RER
phosphoplipids form a bilayer -a system of membranes enclosing a fluid filled space and the surface is comverted with ribosomes
it seperates sysnthesised proteins from cytoplasm s,compartmentalisation,holds ribosomes in place
role of the golgi is relevant to the function of the goblet cell.
to modify the protei and package the vessicle containing the mucus to be secreted via exocytosis
resolution of SEM AND TEM**
tem=0.05-2nm
sem=5-50nm
why are golubular porteins solbule
and what makes up the cilia
the cytoskeleton microtubukes
JUST EXPLAIN LUNGSSSS
how is alveoli adapyte for gaseous exchange
lots of alveoli-large sa
surfuctant
elastic fibres
its got thin walls-made up of squamous epthilium
alveolar walls close to capillaries
inc rod by ddd
well ventilated and good blood supply
when writing glycogens compact what do u say
lots can be stored in a very small spaace
