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Biology > GCSE > Flashcards

GCSE Flashcards

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1
Q

What is the role of a valve

A

To prevent back flow of blood

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2
Q

Why is the heart known as a double pump

A

It pumps blood to the lungs once.

It pumps blood to the body once

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3
Q

What do you use to test for protein

A

Biuret

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4
Q

How do you test for sugars

A

Add Benedict’s then heat in water bath

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5
Q

How do you test for starch

A

Add iodine

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6
Q

Starch=positive

Iodine= ?

A

Blue/black

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7
Q

Sugar=positive

Benedict’s= ?

A

Yellow-green-red

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8
Q

Protein=positive

Biuret= ?

A

Purple

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9
Q

How do you test for lipids

A

Use filter paper

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10
Q

Lipid=positive

Filter paper= ?

A

Transparent

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11
Q

What is the role of bile?

A

Converts food leaving the stomach into an acid/alkaline

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12
Q

Where is bile produced?

A

Liver

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13
Q

Where is bile stored?

A

Gall bladder

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14
Q

Function of plasma

A

A liquid that transports to other blood components

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15
Q

Platelets function?

A

Cell fragments essential to blood clotting

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16
Q

White blood cells function

A

Defence the body against disease

17
Q

Red blood cells function

A

Transport oxygen (no nucleus for more space)

18
Q

What is stage 1 of the cell cycle

A

Cell growth (DNA replicates- 2 copies of each chromosome form)

19
Q

What is stage 2 of the cell cycle

A

Mitosis- the nucleus divides

20
Q

What is stage 3 of the cell cycle

A

Cell division- cytoplasm divides to form 2 genetically identical chromosomes (daughter cells)

21
Q

Explain briefly therapeutic cloning

A
  • nucleus from body cell gets put into empty egg cell
  • egg cell divides and grows into embryo
  • stem cells are grown
22
Q

What is the photosynthesis equation?

A

CO2 + water ———> glucose + oxygen

Light

23
Q

Name 1 factor affecting the rate of photosynthesis

A

Temperature

24
Q

Where is the pacemaker

A

Right atrium

Biology (2 decks)

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