Stain improvement : Wet mount procedure , add stain from the side of the cover slip , use more than on stain.
- biological drawing improvements : State magnification , do not add details to organelles , add scale , Make sure drawings are an accurate representation of actual image ( eg rectangle vs circlw)

Reply 12

cara_mckee

I put spores, because they're reproductive

Original post by EmmaCAnt124

Last fill in the gaps : vector & spores

Original post by b987535

are you sure? i put vectors and gradients???
please tell me im not dumb....

Reply 13

sophiakent

For the 1st 6 marker I wrote about bone marrow disease and effect on t lymphocytes for genes, would this be correct ?

Reply 14

b987535

Original post by cara_mckee

I put spores, because they're reproductive

lol pretty sure spores arent reproductive

Reply 15

lionike123

Staining Question:
- Ensure that there are no air bubbles.
- He never added any dye, he only talked about how to place the sample in the slide.
Positive Feedback question:
- Thermoreceptor transmits impulses to the hypothalamus. Hypothalamus triggers a series of reactions such as vasoconstriction and hairs lie flat. Action Potentials will continue to be generated and therefore positive feedback.
Microorganisms Question: Talk about quorn, cheese, bread and which microorganisms it uses. Many advantages such as they can easily be genetically engineered, population size can be controlled by controlling factors like temperature, they can use waste materials.
Batch vs Continuous:
- 1) Continuous 2) Batch 3) Batch 4) Continuous
Immunity and Variation Question:
- Talk about CD4 receptors in T-helper cells, mutations, how a gene codes for a protein which is an antibody and has different primary structure, secondary structure and the bonds within. The environment you can talk about how there are different pathogens in the environment, animals that live in sterile conditions have a weaker immune system as they have not developed an immunological memory from B-memory Cells. You can then talk about autoimmune responses.
Normal Antibody vs the other antibody:
- The antibody in the drawing can bind to 3 antigens( 3 variable regions) whereas in normal antibody it can bind to 2 antigens.
- The antibody in the drawing cannot bind to phagocytes whereas normal antibodies can.
Volume of cylinder question was 0.78(did not specify significant figure to use).
Last question was vectors and spores.
First question was vacuole and nucleus. Confirmed check here: https://www.sciencephoto.com/media/918418/view/plant-cell-tem
one of the differences question i talked about how it cannot trigger an action potential as voltage gated sodium ion channels close when H+ is present.
Physiological Adaptation question was Environmental.
Students T-test was one answer as well.
I messed up magnification i timesed by 100 rather then divide by 100.
Differences between mammals and the rat( or what ever it was): Mammals can maintain a constant internal environment despite external changes such as temperature whereas the rat( or whatever it was) was dependant on temperature. Also, mammals can live in a greater variety of habitats whereas the rat can only live in the underground.
Mean, mode median question: Both wrong and correct. One of the tables he included the anomalous result to calculate mean so it was wrong. One of the tables he got two modes which you cannot do any statistical test on.

(edited 4 years ago)

Reply 16

Muudeey

pretty darn good paper except for the fact none of the hard **** I memorised didn't come up

Reply 17

letapyikut

For the radius question do you not have to times by 2 to get the diameter

Reply 18

Muudeey

Original post by lionike123

Staining Question:
- Ensure that there are no air bubbles.
- He never added any dye, he only talked about how to place the sample in the slide.
Positive Feedback question:
- Thermoreceptor transmits impulses to the hypothalamus. Hypothalamus triggers a series of reactions such as vasoconstriction and hairs lie flat. Action Potentials will continue to be generated and therefore positive feedback.
Microorganisms Question: Talk about quorn, cheese, bread and which microorganisms it uses. Many advantages such as they can easily be genetically engineered, population size can be controlled by controlling factors like temperature, they can use waste materials.
Batch vs Continuous:
- 1) Continuous 2) Batch 3) Batch 4) Continuous
Immunity and Variation Question:
- Talk about CD4 receptors in T-helper cells, mutations, how a gene codes for a protein which is an antibody and has different primary structure, secondary structure and the bonds within. Environment you can talk about how there is different pathogens in the environment, animals that live in sterile conditions have a weaker immune system as they have not developed an immunoligical memory from B-memory Cells.
Normal Antibody vs the other antibody:
- The antibody in the drawing can bind to 3 antigens( 3 variable regions) whereas in normal antibody it can bind to 2 antigens.
- The antibody in the drawing cannot bind to phagocytes whereas normal antibodies can.
Volume of cylinder question was 0.78.
Last question was vectors and spores.
First question was vacuole and nucleus/or nucleolus( mark scheme will say both).
For one of the differences question i talked about how it cannot trigger an action potential as voltage gated sodium ion channels close when H+ is present.
Physiological Adaptation question was Environmental.
Students T-test was one answer as well.

For positive feedback I talked about the enzymes and metabolic reactions(heat is created). Everything else I got similar answers.