Year 12 test gaps Flashcards
Linear DNA
has two open ends like a chromosome.
Not found in prokaryotes
ribose DNA structure
an OH group on both the 2nd AND third carbon.
What Does the Vacuole do?
- maintain turger pressure
- to store cell sap where sugar is made in photosynthesis.
Function of smooth muscle in bronchioles
contracts to constrict bronchiole, relaxes to dilate bronchiole.
Mechanism of enzyme action
bonds that substrate forms with active site of enzyme puts tention on bonds within substrate.
explain why large organisms need transport system
higher metabollic demand
smaller surface are to volume ratio
diffusion pathway longer
gas exchange is too slow
3 roles of cell surface membrane
- barrier between contents of cell and environment
- receptors for hormones
- regulates which molecules enter and exit the cell
Mitochondria are found in
plant AND animal cells
Name the filter used in colorimitry of glucose analysis
600 nm red
when does independant assortment occur in meiosis
metaphase 1 and 2
