2020 Biology Paper 1 Flashcards
1
Q
What is validity?
A
Validity is the suitability of the method used to answer the question being asked.
2
Q
In TLC, where on the spot is measured to calculate Rf.
A
The middle of the spot.
3
Q
In TLC, why is the TLC plate held at the edges?
A
To ensure that the movement of spots is not affected by damage.
4
Q
What is the main advantage of using a confocal microscope compared to an electron microscope?
A
Confocal microscopes can be used with living cells.
5
Q
What equipment is needed to measure the diameter of something with microscope?
A
- Eyepiece graticule
- Stage micrometer
6
Q
Where are goblet cells found in the lungs?
A
Bronchi and large bronchioles
7
Q
How is tidal volume calculated from a spirogram?
A
The difference in volume between adjacent peaks and troughs.
