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B1 Flashcards

Microscopes, plant and animal cells, enzymes (17 cards)

1
Q

Image size=

A

Magnification x real size

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2
Q

Real size=

A

image size ÷ magnification

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3
Q

Total magnification=

A

Eye piece lens magnification x

objective lens magnification

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4
Q

What microscope would you use to see mitochondria?

A

Electron microscope

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5
Q

What are electrons used for in an electron microscope?

A

Higher magnification and resolution

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6
Q

What microscope would you use to see a living cell?

A

Light microscope

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7
Q

What type of cells are animals and plants made up of?

A

Eukaryotic

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8
Q

What type of cell does a single celled organism contain?

A

Prokaryotic

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9
Q

What extras do plant cells contain?

A

Cell wall, permanent vacuole, chloroplasts

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10
Q

What type of nucleus do sperm and egg cells contain?

A

Haploid

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11
Q

Why do sperm cells have a long tail

A

To swim to egg

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12
Q

Why do sperm cells have lots of mitochondria?

A

For energy for respiration to swim

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13
Q

Why do sperm cells have an acrosome?

A

To store enzymes needed to digest its way into the egg cell membrane

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14
Q

Why do egg cells have a cytoplasm?

A

To contain nutrients needed to feed an embryo

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15
Q

What does an egg cell membrane do after fertilisation?

A

Changes structure so no more sperm can enter so offspring gets the right amount of DNA

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16
Q

How do ciliated epithetal cells move substances?

A

They beat to move substances in one direction along tissue surface

17
Q

How do cillia protect the lungs?

A

Line airways move mucus up the throat to be swallowed- don’t reach lungs