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Flashcards in Cells Deck (65)
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31

what is an active site?

where the substrate bonds and the reaction occures

32

competitive inhibitor

"fights" the substrate and "wins" and goes into the active site

33

Noncompetitive inhibitor

-goes in from the "other side" and changes the shape of the active site
-more permanent that a competitive inhibitor

34

allosteric site

place where the noncompetitive inhibitor goes

35

enzymes need what to work?

coenzyme or cofactor

36

enzymes need what to work?

coenzyme or cofactor

37

Cell Theory

1: All living things are made up of cells
2. Cells are the basic unit of life
3. All cells come from preexisting cells

38

Passive Transport goes from [ ] to [ ] concentration

high to low

39

Is ATP required in Passive Transport?

no

40

Examples of Passive Transport

diffusion, facilitated diffusion, osmosis

41

Examples of Active Transport

endocytosis, phagocytosis, pinocytosis

42

Active Transport goes from [ ] to [ ] concentration

low to high

43

Active Transport goes from [ ] to [ ] concentration

low to high

44

Definition of osmosis

diffusion of water across a semi-permeable membrane

45

Hypertonic

-lower concentration of water outside of the cell
-water moves out of the cell --> cell will shrivel up

46

Hypotonic

-higher concentration of water inside the cell
-water movies into the cell--> cell will swell/burst
-if in a plant cell: plasmolysis

47

Isotonic

-water concentration is the same inside and outside
-no net movement of water

48

Simple diffusion

the tendency of molecules of any substance to spread out into space

49

Facilitated diffusion

-uses transport proteins
-requires no energy
-objects move from high to low

50

Active Transport: Endocytosis

cells take in material by forming vesicles from the plasma membrane

51

Exocytosis

cell secrete macromolecules for fusion of vesicles

52

Types of endocytosis:
Phagocytosis

engulfs solid

53

Types of endocytosis:
Receptor mediated

-highly specific
-receptor proteins on the cell membrane pick up particular molecules from surrounding

54

Types of endocytosis:
Receptor mediated

-highly specific
-receptor proteins on the cell membrane pick up particular molecules from surrounding

55

ADP stands for _______ __ _________

adenine di phosphate

56

ADP stands for _______ __ _________

adenine di phosphate

57

how does ATP work?

the phosphate in ATP holds energy from burning glucose

58

ADP grabs ______ and becomes ATP

energy

59

when you burn sugar you make ___

ATP

60

endergonic reaction

gains energy