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Nat 5 Biology > Cells - Unit 1 > Flashcards

Cells - Unit 1 Flashcards

1
Q

What is the function of the nucleus?

A

Controls all cell activities

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2
Q

What is the function of the mitochondria?

A

Site of aerobic respiration

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3
Q

What is the function of the ribosomes?

A

Site of protein synthesis

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4
Q

What is the function of the cytoplasm?

A

Site of biochemical reactions

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5
Q

What is the function of the cell membrane?

A

Controls passage of substance in and out the cell

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6
Q

What is the function of the vacuole?

A

Stores water and nutrients for cell, also provides support

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7
Q

What is the function of the cell wall?

A

provides plant cell with support

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8
Q

What is the function of the chloroplast?

A

traps sunlight and converts it into chemical energy for photosynthesis.

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9
Q

What is the cell wall made up from?

A

cellulose

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10
Q

What are the two components of the cell membrane

A

proteins and phospholipids

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11
Q

The cell membrane allows small soluble molecules through but not large insoluble molecules.
Name this characteristic.

A

selectively permeable

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12
Q

A difference in concentration between two solutions is called a…

A

gradient

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13
Q

Diffusion is the movement of molecules from what gradient?

A

High to low, no energy

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14
Q

Name one substance that moves into a cell
by diffusion.

A

Glucose, amino acids, oxygen

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15
Q

Name one substance which moves out of the cell by diffusion

A

Carbon Dioxide, waster products

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16
Q

What is osmosis?

A

The movement of water molecules from a high to low concentration gradient through a selectively permeable membrane

17
Q

What happens to an animal cell when placed in pure water?

A

Burst

18
Q

What happens to a plant cell when placed in water?

A

Becomes turigd

19
Q

What happens to a plant cell when placed in a strong salt solution?

A

Plasmolysed

20
Q

What happens to an animal cell when placed in a strong salt solution?

A

shrinks

21
Q

what concentration change takes place in Active transport?

A

Low to high

Nat 5 Biology (15 decks)

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