Cell structure Flashcards

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1
Q

Define Eukaryotic

cells

A

Cells containing a
nucleus and other
membrane-bound
organelles

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2
Q

Define ultrastructure

A

The structures within
a cell which can be
seen by using an
electron microscope

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3
Q

What is the function

of the nucleus?

A

Contains genetic
information in the
form of DNA

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4
Q

What is the function

of the nucleolus?

A

To produce ribosomes

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5
Q

What is the function

of mitochondria? c

A

The site of aerobic
respiration and ATP
production

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6
Q

What is the function

of vesicles?

A

To store and

transport molecules

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7
Q

What is the function

of lysosomes?

A

To break down waste

materials in cells

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8
Q

What is the function

of centrioles?

A

To assemble and
organise spindle
fibres during cell
division

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9
Q

What is the function
of smooth
endoplasmic
reticulum?

A

Lipid and
carbohydrate
synthesis and storage

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10
Q

What is the function
of rough endoplasmic
reticulum?

A

The synthesis and

transport of protein

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11
Q

Define prokaryotic cell

A

A cell with no
membrane-bound
nucleus or organelles

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12
Q

What is the function

of ribosomes?

A

The site of

protein synthesis

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13
Q

What is the function
of the golgi
apparatus?

A

Modifies proteins and
packages’ them into
vesicles

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14
Q

What is the function

of the cell wall?

A

Supports the
individual cell and in
plants the plant as a
whole

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15
Q

What is the function

of the vacuole?

A

Makes the cell turgid
by pushing against
the cell wall, helps to
support the plant

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16
Q

What is the function

of the chloroplasts?

A

Site of photosynthesis
which produces
carbohydrates

17
Q

What is the function

of cilia?

A

Move mucus through

sweeping movements

18
Q

What is the function

of flagella?

A

Used for movement of

the cell

19
Q

What is the outer
membrane of the
vacuole called?

A

Tonoplast

20
Q

What are the function

of plasmids?

A

Used to confer
beneficial genes
between bacterial
cells

21
Q

How are ribosomes
different in
prokaryotic cells to
eukaryotic cells?

A
-Ribosomes are
smaller (70s) in
prokaryotic cells
whereas they are
larger 80s ribosomes
in eukaryotic cells
22
Q

How is genetic
material stored in
prokaryotes?

A
In a single large
chromosome rather
than in a membrane
bound nucleus
Not wrapped around
histone proteins
23
Q

What are microvilli

used for?

A

cells whose main
function is absorption
of small molecules

24
Q

What is the function

of pill?

A

To attach prokaryotes
to specific surfaces
and other cells

25
Q

What is the order
organelles are used in
protein production?

A

-ribosomes on RER
-cisternae of RER
-transport vesicles
via cytoskeleton
-golgi apparatus cis
face then trans face
-secretory vesicles

26
Q

What is the role of the
rough ER in protein
production?

A
-Ribosomes are the
site of protein
synthesis
-The cisternae
packages the proteins
into transport vesicles
27
Q

What are used to
carry proteins that are
to be released from
the cell?

A

Secretory vesicles

28
Q

How are vesicles
transported within the
cell?

A

Via the cytoskeleton

29
Q

How are proteins

released from the cell

A

exocytosis

30
Q

What happens when
the secretory vesicles
reach the plasma
membrane?

A
The vesicles fuse with
the cell membrane
and release their
contents by
exocytosis