Past Papers Flashcards
1
Q
What is a major advantage of using green fluorescent protein in cell biology?
A
It is less toxic than other methods.
2
Q
Describe the protocell structures.
A
- Surrounded by lipid bilayer
- Contained ribozymes and DNA
- Two compartments
3
Q
Give the three roles of cholesterol.
A
- It is the precursor of a vitamin (Vitamin D).
- It modifies the fluidity of membranes.
- It is used to synthesise sex hormones (estradiol and testosterone).
4
Q
Can a phosphatase oppose the activity of a kinase, and vice versa?
A
Yes.
5
Q
Packaging of the DNA in metaphase chromosomes involves…
A
Histones
6
Q
Which are the pathways that deliver material to the lysosome for degradation?
A
- Autophagy
- Phagocytosis
- Endocytosis
7
Q
What is the role of primary cilia?
A
Cellular signalling.
8
Q
What do hair and nails mainly consist of?
A
Keratin
9
Q
Cell division in bacteria is mediated by…
A
FtsZ
10
Q
Mutant moss cells that have no FtsZ protein contain…
A
Longer chloroplasts
11
Q
Which cytoskeletal filament is not included in the fungal cytoskeleton?
A
Intermediate filaments
