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IGCSE-coordinated science BIOLOGY > biological molecules > Flashcards

biological molecules Flashcards

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1
Q

Define metabolism

A

All the chemical reactions taking place in the cells of the body

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2
Q

Elements of Carbohydrates?

A

Carbon
Hydrogen
Oxygen

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3
Q

What are carbohydrates made out of?

A

Sugar

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4
Q

What are the elements of Protein?

A

Carbon
Hydrogen
Oxygen
Nitrogen
Sulfur

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5
Q

What are carbohydrates?

A

Long-chain molecules made up of smaller molecules called AMINO ACIDS

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6
Q

What are the elements of fat?

A

Carbon
Hydrogen
Oxygen

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7
Q

What is the structure of a fat?

A

3 fatty acid molecules stuck into 1 glycerol molecule

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8
Q

What solution is used to test starch?

A

Iodine

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9
Q

What is the positive result of an iodine test?

A

It turns from yellow to blue-black

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10
Q

What is the Benedict solution used to test?

A

Reducing sugar

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11
Q

What is the positive result of the benedict solution?

A

It turns from Bright blue to orangish colour.

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12
Q

Do you have to boil during the test for reducing sugar?

A

Yes

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13
Q

What is the Biuret solution used for?

A

Testing Protein

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14
Q

What is the positive result for testing protein?

A

It turns from blue to violet

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15
Q

What is solution used in testing fats?

A

Ethanol

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16
Q

Do you have to shake the ethanol?

A

yes

17
Q

What is the positive result for testing fats?

A

It turns to a white emulsion

18
Q

What does a DNA molecule consists of?

A

2 strand coiled together to form a double mix

19
Q

What does adenine(A) bond with?

A

Thymine(T)

20
Q

What does Cytosine(C) bond with?

A

Guanine(G)

21
Q

What is a chromosome made up of?

A

A long super-coiled stand of DNA

22
Q

What are the chemical elements in proteins?
A. Carbon, Hydrogen and Oxygen
B. Carbon, Hydrogen, Nitrogen and Oxygen
C. Carbon, Hydrogen, Nitrogen, Sulfur and Oxygen
D. Carbon, Nitrogen, Oxygen and Sulfur

A

C

IGCSE-coordinated science BIOLOGY (7 decks)

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