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Biology > Grade 11 Unit 2 > Flashcards

Grade 11 Unit 2 Flashcards

1
Q

the energy that joins atoms together to form a molecule

A

bond

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2
Q

T number of bonds an atom can make with other atoms

A

valency

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3
Q

……. hold the two strands of a DNA molecule together and help to hold protein molecules in shape

A

Hydrogen bonds

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4
Q

T/F
Nearly all the polysaccharides found in living things are polymers of ketose monosaccharides.

A

F, aldose

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5
Q

…..are molecules with the same chemical composition, but a different arrangement of atoms

A

isomers

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6
Q

…….are a group of atoms within a molecule that behaves in a particular way

A

functional group

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7
Q

……… are so insoluble in water that they make excellent water repellents, for example, in coating birds’ feathers and the epidermis of the leaves of plants (the waxy cuticle).

A

Waxes

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8
Q

……… are one of the basic components of all cell membranes

A

Phospholipids

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9
Q

…….is the functional group of the fatty acid

A

carboxyl group

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10
Q

……..is the bond that forms between a carboxyl group and a hydroxyl group

A

ester bond

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11
Q

….?….. help to prevent cholesterol being laid down in the linings of arteries (atherosclerosis) and so help to prevent heart disease.

A

Polyunsaturated fatty acids

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12
Q

……….. molecules form ion • channels, transport proteins and surface receptors for hormones, neurotransmitters and other molecules

A

protein

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13
Q

…… is wound around • molecules of the protein histone to form a chromosome

A

DNA

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14
Q

amino acids are the building blocks of proteins and have two functional groups …… n ……..

A

the amino group and the carboxyl group.

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15
Q

…….is a linear polymer consisting of amino acid residues bonded together in a chain forming a part or all of a protein molecule

A

polypeptide

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16
Q

Which structure of each protein is coded for by DNA which determines the type and position of each amino acid in the polypeptide chain

A

primary structure

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17
Q

Which protein structure determines where ionic and hydrogen • bonds and disulphide bridges form, so it determines the tertiary structure and shape of the protein molecule.

A

secondary

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18
Q

There are two functional groups in monosaccharides:

A

Aldose and ketose group

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19
Q

…….is the fibrous protein found in many tissues in mammals

A

Collagen

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20
Q

…… is measure of how difficult it is to break surface of liquid

A

Surface tension

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21
Q

T/F
Water dissolves polar n ionic substances

A

T

22
Q

When glycerol combines with one fatty acid

A

Monoglyceride

23
Q

When glycerol combines with two fatty acids

A

Digylceride

24
Q

When glycerol combines with three fatty acids

A

Triglycerides

25
Q

…….. is a 3C alcohol that contains OH groups

A

Glycerol

26
Q

……… is a long straight chain of carbon atoms with carboxyl group at one end

A

FA

27
Q

Triglycerides can be classified into

A

Fats n oils

28
Q

What is biological properties of triglycerides determined by

A

*length of chain of carbon atoms
*degree of saturation

29
Q

Which generally gives better health benefits when present in human diet

A

Polyunsaturated FA

30
Q

…… is backbone of triglycerides

A

Glycerol

31
Q

……… is tail of triglycerides

A

FA

32
Q

Which FA is more energetic because it contains larger number of hydrogen

A

Saturated FA

33
Q

Lipid used to make sex hormones is

A

Steroid

34
Q

….. is the leaner sequence of A.A

A

Primary structure

35
Q

In alpha helical structure the H bonding occurs between ……..

A

Atoms within same polypeptide chain

36
Q

In beta pleated sheet the hydrogen bonding takes place between …..

A

Between polypeptide chains

37
Q

The primary structure of protein is firmly maintained by which bond

A

Peptide bond

38
Q

Which protein structure is determined by type n position of each a.a in the polypeptide chain folds

A

Primary structure

39
Q

Insulin is an example of which protein structure

A

Primary

40
Q

Hemoglobin is example of which protein structure

A

Quaternary

41
Q

Nitrogenous base which are double ringed are called ……. n contain which which

A

Purines. Adenine n guanine

42
Q

Nitrogenous base which is single ringed is called …… n contains which which

A

Pyramidines. Thymine, uracil, cytosine

43
Q

The number of thymine equals with ….. in dna

A

Adenine

44
Q

What’s absent in nucleosides that’s present in nucleotides

A

Phosphate group

45
Q

How does dna code for proteins in a cell?

A

By arranging certain nitrogen bases of cell in particular order

46
Q

Carbohydrates chemistry is determined by their …… group

A

Hydroxyl group

47
Q

Glucose differs from galactose in ……….

A

Position of -OH group on the third carbon

48
Q

The most commonly known groups of fat are

A

Triglycerides

49
Q

T/F
Starch is storage form of fat in plants

A

F. It’s not fat, rather carbohydrate

50
Q

What is amphibatic lipid

A

Molecule with hydrophilic polar head n hydrophobic nonpolar tail

51
Q

T/F
Phospholipids are amphibatic lipids

A

T

Biology (15 decks)

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