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IBD Biology (Unit 2 : Chemistry Of Life) Quiz on Unit 2 : Chemistry Of Life, created by cloud.berry on 26/05/2013.

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Unit 2 : Chemistry Of Life

Question 1 of 36

1

The element nitrogen is combined with carbon, hydrogen and oxygen in compounds called _____ from which _____ are constructed .

Select one of the following:

  • Amino acids | proteins

  • Proteins | amino acids

  • Lipids | amino acids

  • Carbohydrates | lipids

Explanation

Question 2 of 36

1

The ______ is the smallest part of an element that can take part in a chemical change.

Select one of the following:

  • Atom

  • Molecule

  • Ion

Explanation

Question 3 of 36

1

A polar molecule is one that carries :

Select one of the following:

  • An unequal distribution of electrical charge within it.

  • An equal distribution of electrical charge within it.

Explanation

Question 4 of 36

1

The specific heat capacity refers to :

Select one of the following:

  • the amount of heat energy required to raise the temperature of [water}.

  • the amount of force required to raise the temperature of [water].

  • the amount of energy required to lower to temperature of [water].

Explanation

Question 5 of 36

1

The latent heat of vaporisation refers to :

Select one of the following:

  • the amount of energy needed to turn liquid water into water vapour {gas}.

  • the amount of energy needed to turn water vapour into liquid water.

Explanation

Question 6 of 36

1

The latent heat fusion refers to :

Select one of the following:

  • The amount of energy required to be removed from water to turn it to ice.

  • The amount of energy required to be given to ice to water to turn it to ice.

Explanation

Question 7 of 36

1

Water reaches its maximum density at __ degrees celsius.

Select one of the following:

  • 4

  • 2

  • 3

  • 5

  • 1

  • 0

  • -1

Explanation

Question 8 of 36

1

Name the force by which individual molecules stick together.

Select one of the following:

  • Cohesion

  • Adhesion

  • Latent heat of fusion

  • Latent heat of vaporisation

  • Specific heat capacity

Explanation

Question 9 of 36

1

The force by which individual molecules cling to surrounding surfaces and materials is..?

Select one of the following:

  • Adhesion

  • Cohesion

  • Surface tension

Explanation

Question 10 of 36

1

"Below the surface water molecules slide past each other very easily" -this is an example of which property?

Select one of the following:

  • Low viscosity

  • High viscosity

  • High surface tension

  • Low surface tension

Explanation

Question 11 of 36

1

Compounds containing carbon that are found in living organisms are called :

Select one of the following:

  • Organic compounds

  • Unhealthy compounds

  • Healthy compounds

  • Nutritious compounds

Explanation

Question 12 of 36

1

Examples of monosaccharides, a type of carbohydrate, are :

Select one of the following:

  • Glucose

  • Fructose

  • Sucrose

  • Lactose

  • Maltose

  • Ribose

  • Cellulose

  • Glycogen

  • Starch

Explanation

Question 13 of 36

1

Examples of disaccharides {a type of carbohydrate) are :

Select one or more of the following:

  • Ribose

  • Fructose

  • Cellulose

  • Starch

  • Glucose

  • Sucrose

  • Lactose

  • Maltose

  • Glycogen

Explanation

Question 14 of 36

1

Examples of polysaccharides (a type of carbohydrate) are :

Select one or more of the following:

  • Starch

  • Glycogen

  • Cellulose

  • Fructose

  • Ribose

  • Glucose

  • Maltose

  • Lactose

  • Sucrose

Explanation

Question 15 of 36

1

The molecular formula "C{6}H{12}O{6}" shows _____ .

Select one of the following:

  • Glucose

  • Ribose

  • Fructose

Explanation

Question 16 of 36

1

When two monosaccharides molecules combine to form a disaccharide and a molecule of water is also formed as a product, this is known as a ______ .

Select one of the following:

  • Condensation reaction

  • Glycosidic linkage

Explanation

Question 17 of 36

1

_____ appear in living things as animal fats and plant oils, and also as phospholipids of cell membranes.

Select one of the following:

  • Lipids

  • Carbohydrates

  • Proteins

  • Nucleic acids

Explanation

Question 18 of 36

1

Lipids like carbohydrates also contain carbon, hydrogen and oxygen, but in lipids the proportion of _____ is much _____ .

Select one of the following:

  • Oxygen | less

  • Oxygen | more

  • Carbon | more

  • Carbon | less

  • Hydrogen | more

  • Hydrogen | less

Explanation

Question 19 of 36

1

Fats & oils are compounds called ______ formed by condensation reactions between _____ and an alcohol called _______ forming a bond called _______ .

Select one of the following:

  • Triglycerides | fatty acids | glycerol | esther linkage

  • Lipids | carbohydrates | galactose | esther linkage

Explanation

Question 20 of 36

1

____ produce more energy per gram than _____ due to the presence of less carbon.

Select one of the following:

  • Lipids | carbohydrates

  • Carbohydrates| lipids

Explanation

Question 21 of 36

1

As well as carbon, hydrogen and oxygen , proteins also contain the elements ____ & usually the element _____ .

Select one of the following:

  • Nitrogen | sulphur

  • Argon | nitrogen

  • Sodium | sulphur

  • Nitrogen | calcium

  • Nitrogen | phosphate

Explanation

Question 22 of 36

1

______ are the molecules from which _____ and _____ are built.

Select one of the following:

  • Amino acids | peptides | proteins

  • Amino acids | lipids | polypeptides

Explanation

Question 23 of 36

1

Two ______ combine together with the loss of water to form a ______ .

Select one of the following:

  • Dipeptide

  • Peptide

  • Polypeptide

  • Protein

  • Base

  • Diglyceride

Explanation

Question 24 of 36

1

When two amino acids combine to form a dipeptide the linkage they form is known as ______ .

Select one of the following:

  • Peptide linkage

  • Esther linkage

  • Glycosidic linkage

Explanation

Question 25 of 36

1

Enzymes are ______ ______ made out of _____ .

Select one of the following:

  • Biological | catalysts | proteins

  • Biological | organisms | peptides

Explanation

Question 26 of 36

1

In a reaction catalysed by an enzyme, the starting substance is called the ____ and the resulting is the _____ .

Select one of the following:

  • Substrate | product

  • Product | substrate

  • Item | Molecule

  • Lock | key

Explanation

Question 27 of 36

1

While DNA occurs in the chromosomes of the nucleus, so does some RNA however most is found in the _____ .

Select one of the following:

  • Cytoplasm

  • Nucleus

  • rER

  • Golgi apparatus

  • Lysosomes

  • Mitochondria

Explanation

Question 28 of 36

1

A nucleotide consist of three substances combined together which are :

Select one or more of the following:

  • Nitrogenous base

  • Pentose sugar

  • Phosphoric acid

  • Phosphate

  • Lipid

  • Hexose sugar

Explanation

Question 29 of 36

1

The enzyme _____ catalyses the reaction which occurs when the sugar and phosphate groups of adjacent nucleotides of new strands condense together.

Select one of the following:

  • DNA polymerase

  • Helicase

  • Glutamic acid

Explanation

Question 30 of 36

1

_____ are formed at ribosomes in the _____ .

Select one of the following:

  • Proteins | cytoplasm

  • Amino acids | nucleus

  • Amino acids | cytoplasm

  • Proteins | nucleus

Explanation

Question 31 of 36

1

There are three function types of RNA known as :

Select one or more of the following:

  • (Messenger) mRNA

  • (Transfer) tRNA

  • Ribosomal RNA

  • (Messaging) mRNA

  • (Transcend) tRNA

  • Ribbed RNA

Explanation

Question 32 of 36

1

mRNA is formed in the _____ and passes out to _____ in the ____, tRNA & ribosomal RNA are occur only in the _____ .

Select one of the following:

  • Nucleus | ribosomes | cytoplasm | cytoplasm

  • Nucleus | mitochondria | cytoplasm | ribosomes

Explanation

Question 33 of 36

1

The steps of protein synthesis in chronological order are :

Select one of the following:

  • Transcription | Amino acid activation | Translation

  • Amino acid activation | Translation | Transcription

  • Translation | Transcription | Amino acid activation

Explanation

Question 34 of 36

1

Stage 1 of protein synthesis occurs in the ____ where a complementary copy of the code is made by the building of a molecule of mRNA.

Select one of the following:

  • Nucleus

  • Mitochondria

  • rER

  • Cytoplasm

  • Golgi apparatus

Explanation

Question 35 of 36

1

_____ catalyses the synthesis of mRNA

Select one of the following:

  • RNA polymerase

  • mRNA polymerase

  • Helicase

  • RNA

Explanation

Question 36 of 36

1

__ bases (a codon) equal 1 amino acid.

Select one of the following:

  • 3

  • 2

  • 4

  • 5

Explanation

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