Biology SNAB a-level practical write up - root squash (5)
9 views 0 purchase
Course
Practical write up
Institution
PEARSON (PEARSON)
Alevel biology practical write up is a report of a laboratory experiment conducted by students. It is required as part of the assessment for the subject.
The a-level biology practical write up document is a professional report and should be organised in a clear and logical manner. It should inc...
Investigating mitosis
To be able to prepare and stain a root tip to observe the stages of mitosis under a
microscope.
Mitosis is a type of cell division that produces two genetically identical daughter cells. It is
important for development and growth as it populates an organism body with cells and
replaces old damaged cells. Mitosis consists of 4 phases: Prophase - chromosomes
condense and spindle fibres begin to emerge from the centrosomes; Metaphase -
centromeres reach opposite poles and chromosomes line up at the equator of the spindle;
Anaphase - the sister chromatids separate at the centromere, the spindle fibres begin to
shorten and the separated sister chromatids are pulled to opposite poles; Telophase -
chromosomes arrive at opposite poles and begin to decondense, nuclear envelopes begin to
reform around each set of chromosomes and the the spindle fibres break down[1]
Equipment:
● Garlic Roots
● Hydrochloric Acid
● Acetic Alcohol (ethanoic alcohol)
● Ice-cold distilled water
● Water bath at 60°C
● 2 watch glasses
● Test tubes
● Microscope (with magnification between x100 & x400) and microscope slides
● Soft tissue paper
● Pipettes
● Scalpel
Risk Assessment;
➔ Probability/severity of risk: 1-Low, 2-Medium, 3-High/Likely
➔ Total Risk: 1, 2,3, 4, 6, 9
Risk: Hazard: Probability: Severity: Total Risk: Precaution:
hot liquid Burns 1 3 4 Take care when
handling hot liquids;
Hold the top of test
tube to avoid burning
fingers
acetic stain 2 1 3 If it spills clean up
orcein stain quickly and wash
hands to prevent
stains
Sharp Injuring 2 2 4 Take care when
objects yourself using this equipment,
(Scalpel) always use safely
and securely
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Strvlight. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $5.16. You're not tied to anything after your purchase.
