B2 Cell Structure Flashcards

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1
Q

Cell membrane

A

Controls entry and exit of substances (partially permeable)
Containing the cytoplasm

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2
Q

Cytoplasm

A

Water based gel that fills the cell containing cell structure
Site of chemical reactions

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3
Q

Cytoplasm

A

Water based gel that fills the cell containing cell structure
Site of chemical reactions

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4
Q

Nucleus

A

Contains genetic material (DNA, chromosomes)
Controls all activity of the cell

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5
Q

Vacuole

A

Contains water, salt, sugar, keeps cell firm (turgid)
Supports plant and keeps it upright

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6
Q

Cell wall

A

Made of cellulose, fully permeable
Prevents cell from birsting

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7
Q

Chloroplast

A

Contains chlorophyll (green pigment) absorbs light energy
Sire of photosynthesis

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8
Q

Mitochondria

A

Site of aerobic respiration and releases energy for the cell

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9
Q

Ribosomes

A

Site of protein synthesis

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10
Q

Similarities in plant and animal cells

A

Cell membranes
Cytoplasm
Mitochondria
Nucleus
Ribosomes

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11
Q

Circular DNA (DNA loop)

A

Single loop of DNA, not in a neucleus

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12
Q

Cell wall in bacteria

A

Made of protein and carbohydrate

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13
Q

Plasmid

A

Small DNA circle , allows exchange of DNA from one bacteria to another - creates genetic variation

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14
Q

Helix

A

Spiral

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15
Q

Ciliated cell

A

Helps the movement of mucus in the trachea and the bronchi
Has hair like structures called cilia the move the mucus up

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16
Q

Root hair cells

A

Extra surface area to absorb more water and ions

17
Q

Palisade mesophyll cells

A

Photosynthesis

18
Q

Neurons

A

Conduct electric impulses ( has extensions and branches to reach other neurons)

19
Q

Red blood cells

A

Transport oxygen, are biconcave to hold more oxygen, haemoglobin in the cytoplasm, no nucleus for more surface area, small to fit through capillaries

20
Q

Sperm cell

A

Is the male reproductive cell, has a tail to swim to the egg cell, head contains nucleus and acrosome (digestive enzymes to help sperm penetrate egg), mid piece contains many mitochondria for extra energy

21
Q

Egg cell

A

Female reproductive cell, has jelly coating, large cytoplasm food storage for growing embryo
Cell membrane changes when the sperm penetrates so no more sperm can enter