Molecules of Life, Cell II Week 2 Flashcards
1
Q
What main energy source do cells use?
A
ATP
2
Q
What are the 3 sources of energy
A
- Phototrophs: from sunlight
- Chemoorganotrophs: from organic molecules
- Chemolithotrophs: from inorganic molecules
3
Q
What is the definition of Heterotrophs
A
- consumers that consume molecules produced by other organisms
4
Q
Autotrophs:
A
- self synthesized from CO2, CH4 or other simple molecules
5
Q
What are the three domains of life?
A
Archea, Eukarya and Bacteria
6
Q
What do all three domains of cells share in characteristics?
A
- Basic building blocks
- Genetic information flow
- Plasma membrane
- use and need for energy
7
Q
What do bacteria and Archaea have in common
A
- They are both prokaryotes ( lack membrane bound nucleus)
- Greatest metabolic diversity of all organisms
- Vastly outnumber other types of organisms
- Live successfully in almost all regions of Earth’s surface, from Antarctic to hot springs
8
Q
What is the definition of Eukaryotes?
A
they have a membrane bound nucleus
9
Q
Cell theory states that:
A
- All living things are composed f cells
- Cells arise from other cells
10
Q
What characteristics do bacteria and archaea has in terms of structure and function?
A
- Appear simple in structure and small in size compared with eukaryotic cells
- appear in a variety of shapes
11
Q
What do most prokaryotic cells chare in terms of cell structure?
A
- no Nucleus- DNA in nucleoid
- most single circular chromosome
- ribosomes
- cytoplasm
- plasma membrane
- cell wall
- Glycocalyx
- many have flagella and/or fimbriae
