Cell wall, Vacuoles and chloroplast Flashcards

1
Q

Which organelle is absent from plant cells?

A

Centriole

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2
Q

The cell wall is outside…

A

the cell surface membrane.

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3
Q

The cell wall is rigid thanks to…

A

the fibres and cellulose.

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4
Q

The cell wall gives a define…

A

shape and prevents the cell from bursting.

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5
Q

The cell wall may be reinforced with…

A

extra cellulose or lignin.

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6
Q

The cell wall is freely…

A

permeable.

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7
Q

Plasmodesmata are fine…

A

strands of cytoplasm that pass through the walls of neighbouring cells.

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8
Q

Protoplast is…

A

everything inside the cell membrane, including it.

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9
Q

Plasmodesmata are used for…

A

quicker and more efficient communication between cells.

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10
Q

Plant vacuoles are…

A

large, permanent and central.

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11
Q

Chloroplast is…

A

relatively large organelle.

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12
Q

Granum is a small…

A

the structure inside the chloroplast responsible for light absorption.

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13
Q

Granum consists of…

A

stacks of membrane-bound sacs called thylakoids.

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14
Q

Granum contains…

A

70s ribosomes and circular DNA.

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15
Q

Chloroplast has two…

A

membranes. The inner membrane is folded into granum.

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16
Q

Stroma in chloroplast is…

A

ground substance. It contains 70s ribosomes and circular DNA.

17
Q

Protoctists are…

A

unicellular eukaryotes.