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Biology 3 > Biology Test Unit 3 > Flashcards

Biology Test Unit 3 Flashcards

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0
Q

How does your body use a carbohydrate

A

Primary energy source

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1
Q

What are the three macromolecules we studied

A

Carbs,lipids,and proteins

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2
Q

What are the three elements in a carbohydrate

A

Carbon, hydrogen, and oxygen

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3
Q

How can you identify a carbohydrate

A

Take the number of oxygens and multiply by two.

This will tell you the number of hydrogens, also tend to ring shape

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4
Q

What does disaccharide mean

A

Two sugars

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5
Q

What does monosaccharides mean

A

One sugar

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6
Q

What does polysaccharides mean

A

Many sugars

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7
Q

What is the chemical test for a saccharide

A

Benedict’s

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8
Q

What color does Benedict’s turn if it is a negative test result

A

Orange

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9
Q

What color does Benedict’s turn if it is a negative test result

A

Blue

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10
Q

What does a positive Benedict’s test mean

A

There are monosaccharides present

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11
Q

What does a negative Benedict’s test mean

A

There are no monosaccharides present

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12
Q

What is the chemical test for a polysaccharide

A

Iodine

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13
Q

What color does Iodine turn if it is a positive test result?

A

Purple

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14
Q

What color does Iodine turn if it is a negative test result?

A

Yellow

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15
Q

What does a positive Iodine test result mean

A

Polysaccharides are result

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16
Q

What does a negative Iodine test result mean?

A

Polysaccharides are not present

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17
Q

What is the purpose of a lipid?

A

Energy storage and insulation

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18
Q

What are the building blocks of a lipid?

A

Glycerol and 3 fatty acids

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19
Q

What are the elements in a lipid?

A

Carbon, hydrogen and oxygen

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20
Q

How can you identify a lipid?

A

The glycerol backbone and the long chain of carbons

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21
Q

What are the two tests that you can run for a lipid?

A

Solubility and brown paper bag

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22
Q

What does a positive solubility test look like?

A

2 layers - Lipids do not mix with water

23
Q

What does a negative solubility test look like?

A

1 layer - solution mixed with water

24
Q

What does a positive solubility test mean?

A

There are lipids present

25
Q

What does a negative solubility test mean?

A

There are no lipids present

26
Q

What does a positive brown bag test look like?

A

A stain that never dries

27
Q

What does a negative brown paper bag test look like?

A

A spot that will dry

28
Q

What does a positive brown paper bag test mean?

A

Lipids are present

29
Q

What does a negative brown paper bag test mean?

A

Lipids are not present

30
Q

What are the five ways your body uses a protein?

A 
ENZYMES - speed up reactions
Structure 
Transport important nutrients
Defense
Hormones - sending signals
31
Q

What are the elements in a protein

A

Carbon, Oxygen, Hydrogen and Nitrogen

32
Q

What are the building blocks of proteins?

A

Amino acids

33
Q

How can you spot an amino acid?

A

COOH - carboxyl group

NH2 - amine group

34
Q

If you joined 8 amino acids together how many waters would be removed?

A

7

35
Q

What ions are in an acid?

A

H+

36
Q

What ions are in a base?

A

OH-

37
Q

What is the pH range of an acid?

A

0 - 6.9

38
Q

What is the pH of a weak acid?

A

6

39
Q

What is the pH of a strong acid?

A

1

40
Q

What is the pH range of a base?

A

7.1 - 14

41
Q

What is the pH of a weak base?

A

8

42
Q

What is the pH of a strong base?

A

14

43
Q

What are the three test papers that we used to determine if something was an acid or a base?

A

Red and blue litmus paper and hydrion paper

44
Q

What did red litmus paper change for?

A

Turned blue for a base

45
Q

What did blue litmus paper change for?

A

Turned red for an acid

46
Q

What did hydrion paper show us?

A

How acidic or how basic something is

47
Q

What does the number in front of a molecule tell you?

Example the 4 in 4H2O

A

The number of molecules present

48
Q

Given the following example how many molecules are there 5 CH4

A

5

49
Q

Given the following example how many hydrogens are there

In each molecule 5 CH4

A

4

50
Q

Given the following example how many total Hydrogens are there in
5 CH4

A

20

51
Q

What is cohesion?

A

Water sticking to water

52
Q

What is adhesion?

A

Water sticking to something else

53
Q

What is surface tension?

A

Water sticking to water at the surface creating a thin film

54
Q

What does it mean that water is polar?

A

There is a slightly positive side and a slightly negative side

55
Q

Why is water polar?

A

Oxygen hogs the electrons giving it a negative charge

56
Q

What is a Hydrogen bond?

A

It is a weak bond formed between water molecules because of the slight charges.

Biology 3 (7 decks)

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