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Biology SBI4U1 > 2.2 Kahoot - exam > Flashcards

2.2 Kahoot - exam Flashcards

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1
Q

Diffusion is the movement of particles from a…

A

High concentration to low concentration

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2
Q

Diffusion across a cell membrane does not require __?

A

Energy

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3
Q

What types of molecules are able to cross the membrane easily via simple diffusion?

A

Small non-polar molecules

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4
Q

How does temperature affect diffusion?

A

Hotter = faster diffusion

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5
Q

What is osmosis?

A

The movement of water from high to low concentration

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6
Q

If a cell is placed in a hypotonic solution, this means….?

A

the solution has LOWER concentration of dissolved solutes than the cell

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7
Q

If a cell is placed in an ISOTONIC solution, this means….?

A

the solution has EQUAL concentration of dissolved solutes to the cell

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8
Q

What kind of environment does a plant cell prefer?

A

hypotonic

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9
Q

Facilitated diffusion requires:

A

a membrane embedded protein

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10
Q

What is a channel protein?

A

opens and closes to let substances pass

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11
Q

What is a carrier protein?

A

a carrier protein changes shape to help move the particles through

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12
Q

Channel proteins allow…

A

small polar and charged molecules to cross

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13
Q

Carrier proteins allow…

A

diffusion across the membranes of larger polar molecules

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14
Q

channel proteins allow ions to move in & out of the cell faster than carrier proteins

A

true

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15
Q

TRUE/FALSE: Carrier proteins require ATP to change shape.

A

False

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16
Q

Active transport

A
  • requires energy
  • moves materials against a concentration gradient
  • is usually done by transport proteins in the cell membrane
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17
Q

What does ATP stand for?

A

Adenosine Tri Phosphate

18
Q

What type of reaction breaks off a phosphate group from ATP and releases energy?

A

hydrolysis reaction

19
Q

Primary active transport:

A

Can transport particles against their concentration gradient

20
Q

Secondary active transport

A
  • moves a substance against its concentration gradient
  • involves co- or counter-transport of 2 substances
  • utilizes energy from a concentration gradient
21
Q

What is phosphorylation?

A

When a phosphate group is added to a molecule

22
Q

What does ATP do to the protein when it phosphorylates it?

A

it changes the protein’s shape

23
Q

Sodium-potassium ATPase (sodium-potassium pump) involves

A

ejecting 3 sodium ions from the cell in exchange for 2 potassium ions

24
Q

What do Symport proteins do in Active transport?

A

transport two different substance in one direction

25
Q

What do Antiport proteins do?

A

transport two different substance in opposite direction

26
Q

What type of transport protein is the sodium-potassium pump?

A

Antiport

27
Q

An electrochemical gradient is when

A

There is a difference in charge across a membrane due to ion transport

28
Q

Secondary active transporters uses…

A

energy stored in the electrochemical gradient of other solutes

29
Q

What is the movement of material out of the cell?

A

Exocytosis

30
Q

Phagocytosis is a type of…

A

Endocytosis

31
Q

Phagocytosis takes in….

A

larger particles

32
Q

Pinocytosis is also known as

A

cell drinking

33
Q

TRUE/FALSE: Pinocytosis and phagocytosis decrease the cell membrane surface area.

A

True

34
Q

Receptor-mediated endocytosis​

A

imports target molecules after they bind to membrane proteins.​

35
Q

TRUE/FALSE: The coated pit is the only place with receptor proteins

A

True

36
Q

Which of the following transport mechanisms require energy?

A

active transport & phagocytosis

37
Q

What type of transport allows large particles to enter the cell?

A

endocytosis

38
Q

What type of transport allows mature proteins to exit the cell?

A

Exocytosis

39
Q

What type of transport allows charged atoms to pass in the cell?

A

Channel protein

40
Q

What type of transport allows oxygen and carbon dioxide into/out of the cell?

A

simple diffusion

Biology SBI4U1 (42 decks)

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