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Worksheets

Bonds

Total questions: 87

Worksheet time: 44mins

Name
Class
Date
1.

Fill in the blank: ________ are strong bonds with a complete electron transfer (gain or loss of electrons).

a)

Ionic bonds

b)

Covalent bonds

c)

Hydrogen bonds

d)

Metallic bonds

2.

Fill in the blank: ________ are strong bonds where electrons are shared.

a)

Covalent bonds

b)

Ionic bonds

c)

Hydrogen bonds

d)

Metallic bonds

3.

Fill in the blank: ________ are weak bonds between H atoms.

a)

Hydrogen bonds

b)

Ionic bonds

c)

Covalent bonds

d)

Metallic bonds

4.

Carbon is the ___ element in the periodic table.

a)

6th

b)

8th

c)

12th

d)

14th

5.

How many valence electrons does carbon have?

a)

2

b)

4

c)

6

d)

8

6.

What is the study of carbon-containing molecules called?

a)

Organic Chemistry

b)

Inorganic Chemistry

c)

Physical Chemistry

d)

Biochemistry

7.

Which of the following best describes organic chemistry?

a)

Study of metals

b)

Study of carbon-containing molecules

c)

Study of gases

d)

Study of acids

8.

What element is represented by the letter 'C' in the structure shown?

a)

Carbon

b)

Calcium

c)

Chlorine

d)

Copper

9.

What are organic compounds?

a)

Compounds that contain carbon atoms covalently bonded to other elements

b)

Compounds that contain only hydrogen atoms

c)

Compounds that do not contain carbon

d)

Compounds that are only found in gases

10.

Which of the following elements can carbon atoms be covalently bonded to in organic compounds?

a)

Hydrogen (H)

b)

Oxygen (O)

c)

Nitrogen (N)

d)

Other carbon (C) atoms

e)

All of the above

11.

Cells are made of many different ______ compounds.

a)

organic

b)

metallic

c)

radioactive

d)

synthetic

12.

What are macromolecules also known as?

a)

Small molecules

b)

Giant molecules

c)

Simple molecules

d)

Ionic molecules

13.

Polymerization/Dehydration synthesis is the process of making large compounds (polymers) from simple monomers using ________ bonds.

a)

covalent

b)

ionic

c)

hydrogen

d)

metallic

14.

What is the process called where large compounds (polymers) are made from simple monomers using covalent bonds?

a)

Hydrolysis

b)

Polymerization/Dehydration synthesis

c)

Photosynthesis

d)

Respiration

15.

Refer to the diagram showing monomers and a polymer. What does the diagram illustrate?

a)

A) Breaking down polymers into monomers

b)

B) Combining monomers to form a polymer

c)

C) Changing the color of molecules

d)

D) Dissolving monomers in water

16.

What is hydrolysis?

a)

Building up organic compounds (monomers to polymers)

b)

Breaking down organic compounds (polymers to monomers)

c)

Forming ionic bonds

d)

None of the above

17.

Hydrolysis involves breaking ________ bonds.

a)

covalent

b)

ionic

c)

hydrogen

d)

metallic

18.

In the hydrolysis reaction shown, maltose reacts with water to produce which two products?

a)

Glucose and fructose

b)

Glucose and glucose

c)

Maltose and sucrose

d)

Sucrose and water

19.

Fill in the blank: One of the 4 main types of organic compounds in biology is _________.

a)

carbohydrates

b)

metals

c)

minerals

d)

salts

20.

Fill in the blank: One of the 4 main types of organic compounds in biology is _________.

a)

lipids

b)

minerals

c)

metals

d)

salts

21.

Fill in the blank: One of the 4 main types of organic compounds in biology is _________.

a)

proteins

b)

minerals

c)

salts

d)

metals

22.

Fill in the blank: One of the 4 main types of organic compounds in biology is _________.

a)

nucleic acids (DNA & RNA)

b)

minerals

c)

water

d)

salts

23.

What elements make up carbohydrates and in what proportion?

a)

Carbohydrates are made of carbon, hydrogen, and oxygen atoms in the proportion of 1:2:1.

b)

Carbohydrates are made of nitrogen, hydrogen, and oxygen atoms in the proportion of 2:1:2.

c)

Carbohydrates are made of carbon, hydrogen, and nitrogen atoms in the proportion of 1:1:2.

d)

Carbohydrates are made of carbon, oxygen, and sulfur atoms in the proportion of 1:2:1.

24.

Which of the following is an example of a carbohydrate?

a)

Glucose

b)

Water

c)

Sodium chloride

d)

Oxygen

25.

What is the chemical formula for glucose?

a)

C6H12O6

b)

C2H5OH

c)

C12H22O11

d)

CH4

26.

Carbohydrates provide structural support in plants.

a)

True

b)

False

27.

What is a major source of energy for the cell according to the information about carbohydrates?

a)

Glucose

b)

Cellulose

c)

Starch

d)

Glycogen

28.

What is a monosaccharide?

a)

1 sugar molecule

b)

2 sugar molecules

c)

Many sugar molecules in a chain

29.

Which of the following is an example of a monosaccharide?

a)

A) Sucrose

b)

B) Glucose

c)

C) Cellulose

30.

A disaccharide consists of how many sugar molecules?

a)

1

b)

2

c)

Many

31.

Which of the following is an example of a disaccharide?

a)

Glucose

b)

Sucrose

c)

Starch

32.

A polysaccharide is made up of ______ sugar molecules in a chain.

a)

many

b)

one

c)

two

d)

few

33.

Which of the following is an example of a polysaccharide?

a)

Glucose

b)

Sucrose

c)

Starch

34.

What is released when two monosaccharides combine to form a disaccharide?

a)

CO2

b)

H2O

c)

O2

35.

What are lipids?

a)

Polar molecules that are soluble in water

b)

Nonpolar molecules that are insoluble (or mostly insoluble) in water

c)

Polar molecules that are insoluble in water

d)

Nonpolar molecules that are soluble in water

36.

Fats are made up of which elements?

a)

Carbon and Oxygen

b)

Carbon and Hydrogen

c)

Hydrogen and Nitrogen

d)

Oxygen and Nitrogen

37.

Fill in the blank: The subunits of fats are ______ and 3 fatty acids.

a)

glycerol

b)

glucose

c)

amino acid

d)

nucleotide

38.

What is the primary function of fats?

a)

Short-term energy storage

b)

Long-term energy storage

c)

Structural support

d)

Enzyme activity

39.

How many fatty acids are attached to the glycerol backbone?

a)

Three fatty acids

b)

One fatty acid

c)

Two fatty acids

d)

Four fatty acids

40.

Which type of fat has fatty acids with only C-C single bonds?

a)

Saturated Fats

b)

Unsaturated Fats

41.

Which type of fat is solid at room temperature?

a)

Saturated Fats

b)

Unsaturated Fats

c)

Trans Fats

d)

Polyunsaturated Fats

42.

Chains of unsaturated fats 'kink' and are ______ at room temperature.

a)

liquid

b)

solid

c)

gaseous

d)

frozen

43.

Saturated fats make good intermolecular bonds and are solid at room temperature.

a)

True

b)

False

44.

What are the long chains of smaller molecules that make up nucleic acids called?

a)

Nucleotides

b)

Amino acids

c)

Fatty acids

d)

Monosaccharides

45.

Nucleotides join together by ______ bonds to make DNA & RNA.

a)

phosphate

b)

hydrogen

c)

ionic

d)

peptide

46.

Which of the following is NOT a component of a basic nucleotide structure?

a)

Nitrogen Base

b)

Phosphate

c)

Five Carbon Sugar

d)

Amino Acid

47.

Nucleotides join together by phosphate bonds to make DNA & RNA.

a)

True

b)

False

48.

What does DNA stand for?

a)

Deoxyribonucleic acid

b)

Deoxyribose acid

c)

Dioxyribonucleic acid

d)

Deoxyribonitric acid

49.

Is DNA double-stranded or single-stranded?

a)

Double-stranded

b)

Single-stranded

c)

Triple-stranded

d)

Circular

50.

What is the sugar present in DNA?

a)

Ribose

b)

Deoxyribose

c)

Glucose

d)

Fructose

51.

Which of the following is NOT a nitrogenous base in DNA?

a)

A) Adenine

b)

B) Guanine

c)

C) Uracil

d)

D) Thymine

52.

What is the main function of DNA?

a)

Providing energy

b)

Storing hereditary information

c)

Transporting oxygen

d)

Breaking down food

53.

Refer to the diagram of the DNA double helix. Which base pairs with adenine (A)?

a)

Guanine (G)

b)

Thymine (T)

c)

Cytosine (C)

d)

Uracil (U)

54.

Refer to the diagram of the DNA double helix. Which base pairs with cytosine (C)?

a)

Guanine (G)

b)

Thymine (T)

c)

Adenine (A)

d)

Uracil (U)

55.

Which of the following is a nitrogenous base found in DNA?

a)

A) Adenine

b)

B) Glucose

c)

C) Ribose

d)

D) Fructose

56.

Fill in the blank: The backbone of the DNA molecule is made up of _________

a)

sugar-phosphate

b)

amino acids

c)

fatty acids

d)

nitrogen bases

57.

Which nitrogenous base pairs with Thymine in DNA?

a)

Guanine

b)

Cytosine

c)

Adenine

d)

Uracil

58.

Fill in the blank: In DNA, Guanine always pairs with _________.

a)

Cytosine

b)

Adenine

c)

Thymine

d)

Uracil

59.

What does RNA stand for?

a)

Ribonucleic acid

b)

Ribose nucleic acid

c)

Ribosome nucleic acid

d)

Ribonitric acid

60.

Which of the following is a characteristic of RNA?

a)

Double-stranded

b)

Single-stranded

c)

Contains deoxyribose

d)

Contains thymine

61.

The sugar present in RNA is _______.

a)

ribose

b)

glucose

c)

deoxyribose

d)

fructose

62.

Which of the following is NOT a nitrogenous base found in RNA?

a)

A) Adenine

b)

B) Guanine

c)

C) Thymine

d)

D) Uracil

63.

RNA makes up ribosomes (rRNA) and is involved in protein synthesis (mRNA, tRNA).

a)

True

b)

False

64.

What are proteins made up of?

a)

Nucleic acids

b)

Amino acids

c)

Fatty acids

d)

Sugars

65.

Amino acids are joined together by _______ to make proteins.

a)

peptide bonds

b)

hydrogen bonds

c)

glycosidic bonds

d)

ester bonds

66.

Which of the following elements are found in proteins?

a)

Hydrogen, oxygen, nitrogen, carbon, phosphorus

b)

Sodium, chlorine, potassium, calcium

c)

Iron, copper, zinc, magnesium

d)

Sulfur, selenium, iodine, fluorine

67.

Which structure represents the three-dimensional shape of a single polypeptide chain?

a)

Primary structure

b)

Secondary structure

c)

Tertiary structure

d)

Quaternary structure

68.

Fill in the blank: One of the functions of proteins is to provide support and structure. An example of such a protein is ________.

a)

collagen

b)

insulin

c)

hemoglobin

d)

amylase

69.

Fill in the blank: Proteins that speed up chemical reactions are called ________.

a)

enzymes

b)

lipids

c)

hormones

d)

carbohydrates

70.

Fill in the blank: Proteins that help in the transport of substances across cell membranes are called ________.

a)

carrier proteins

b)

structural proteins

c)

enzymes

d)

receptor proteins

71.

Which of the following is a function of proteins?

a)

Defense

b)

Hormones

c)

Motion

d)

All of the above

72.

Which protein is responsible for defense in the body?

a)

Insulin

b)

Antibodies

c)

Myosin

d)

Actin

73.

Which protein acts as a hormone?

a)

Insulin

b)

Flagella

c)

Myosin

d)

Actin

74.

Name a protein involved in motion in the body.

a)

Flagella, myosin, or actin

b)

Insulin

c)

Hemoglobin

d)

Collagen

75.

Fill in the blank: ________ are proteins that help defend the body against pathogens.

a)

Antibodies

b)

Enzymes

c)

Hormones

d)

Carbohydrates

76.

Fill in the blank: The protein ________ is a hormone that regulates blood sugar levels.

a)

Insulin

b)

Hemoglobin

c)

Keratin

d)

Collagen

77.

What is a chemical reaction?

a)

A process that releases or stores energy and breaks or forms new chemical bonds

b)

A process that only stores energy

c)

A process that only breaks bonds

d)

A process that does not involve energy

78.

In a chemical reaction, what are the starting materials called?

a)

Products

b)

Reactants

c)

Catalysts

d)

Enzymes

79.

In a chemical reaction, what are the ending materials called?

a)

Reactants

b)

Products

c)

Catalysts

d)

Enzymes

80.

In a chemical equation, the arrow means ________ or _________.

a)

yields; produces

b)

reacts; combines

c)

melts; dissolves

d)

splits; separates

81.

A chemical reaction can both release and store energy.

a)

True

b)

False

82.

Fill in the blank for the photosynthesis chemical reaction: 6CO₂ + 6H₂O + solar energy → ______ + 6O₂.

a)

C₆H₁₂O₆

b)

C₂H₅OH

c)

CH₄

d)

C₆H₆

83.

What is the product formed when sodium (Na) reacts with chlorine (Cl₂)?

a)

NaCl

b)

NaCl₂

c)

Na₂Cl

d)

Na₂Cl₂

84.

Refer to the diagrams labeled Graph A and Graph B. Which type of reaction is represented by Graph A?

a)

Exothermic

b)

Endothermic

c)

Both

d)

Neither

85.

Fill in the blank: In an ________ reaction, energy is released to the surroundings. (Refer to the diagrams labeled Graph A and Graph B.)

a)

exothermic

b)

endothermic

c)

isothermal

d)

photochemical

86.

Fill in the blank: In an ________ reaction, energy is stored in the products. (Refer to the diagrams labeled Graph A and Graph B.)

a)

endothermic

b)

exothermic

c)

combustion

d)

decomposition

87.

What is activation energy?

a)

Energy needed to start a chemical reaction.

b)

Energy released during a chemical reaction.

c)

Energy stored in the products of a reaction.

d)

Energy lost as heat in a reaction.

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