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Unit 2 : Chemistry Of Life

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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.
cloud.berry
Quiz by cloud.berry, updated more than 1 year ago
cloud.berry
Created by cloud.berry over 11 years ago
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Resource summary

Question 1

Question
The element nitrogen is combined with carbon, hydrogen and oxygen in compounds called _____ from which _____ are constructed .
Answer
  • Amino acids | proteins
  • Proteins | amino acids
  • Lipids | amino acids
  • Carbohydrates | lipids

Question 2

Question
The ______ is the smallest part of an element that can take part in a chemical change.
Answer
  • Atom
  • Molecule
  • Ion

Question 3

Question
A polar molecule is one that carries :
Answer
  • An unequal distribution of electrical charge within it.
  • An equal distribution of electrical charge within it.

Question 4

Question
The specific heat capacity refers to :
Answer
  • 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].

Question 5

Question
The latent heat of vaporisation refers to :
Answer
  • 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.

Question 6

Question
The latent heat fusion refers to :
Answer
  • 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.

Question 7

Question
Water reaches its maximum density at __ degrees celsius.
Answer
  • 4
  • 2
  • 3
  • 5
  • 1
  • 0
  • -1

Question 8

Question
Name the force by which individual molecules stick together.
Answer
  • Cohesion
  • Adhesion
  • Latent heat of fusion
  • Latent heat of vaporisation
  • Specific heat capacity

Question 9

Question
The force by which individual molecules cling to surrounding surfaces and materials is..?
Answer
  • Adhesion
  • Cohesion
  • Surface tension

Question 10

Question
"Below the surface water molecules slide past each other very easily" -this is an example of which property?
Answer
  • Low viscosity
  • High viscosity
  • High surface tension
  • Low surface tension

Question 11

Question
Compounds containing carbon that are found in living organisms are called :
Answer
  • Organic compounds
  • Unhealthy compounds
  • Healthy compounds
  • Nutritious compounds

Question 12

Question
Examples of monosaccharides, a type of carbohydrate, are :
Answer
  • Glucose
  • Fructose
  • Sucrose
  • Lactose
  • Maltose
  • Ribose
  • Cellulose
  • Glycogen
  • Starch

Question 13

Question
Examples of disaccharides {a type of carbohydrate) are :
Answer
  • Ribose
  • Fructose
  • Cellulose
  • Starch
  • Glucose
  • Sucrose
  • Lactose
  • Maltose
  • Glycogen

Question 14

Question
Examples of polysaccharides (a type of carbohydrate) are :
Answer
  • Starch
  • Glycogen
  • Cellulose
  • Fructose
  • Ribose
  • Glucose
  • Maltose
  • Lactose
  • Sucrose

Question 15

Question
The molecular formula "C{6}H{12}O{6}" shows _____ .
Answer
  • Glucose
  • Ribose
  • Fructose

Question 16

Question
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 ______ .
Answer
  • Condensation reaction
  • Glycosidic linkage

Question 17

Question
_____ appear in living things as animal fats and plant oils, and also as phospholipids of cell membranes.
Answer
  • Lipids
  • Carbohydrates
  • Proteins
  • Nucleic acids

Question 18

Question
Lipids like carbohydrates also contain carbon, hydrogen and oxygen, but in lipids the proportion of _____ is much _____ .
Answer
  • Oxygen | less
  • Oxygen | more
  • Carbon | more
  • Carbon | less
  • Hydrogen | more
  • Hydrogen | less

Question 19

Question
Fats & oils are compounds called ______ formed by condensation reactions between _____ and an alcohol called _______ forming a bond called _______ .
Answer
  • Triglycerides | fatty acids | glycerol | esther linkage
  • Lipids | carbohydrates | galactose | esther linkage

Question 20

Question
____ produce more energy per gram than _____ due to the presence of less carbon.
Answer
  • Lipids | carbohydrates
  • Carbohydrates| lipids

Question 21

Question
As well as carbon, hydrogen and oxygen , proteins also contain the elements ____ & usually the element _____ .
Answer
  • Nitrogen | sulphur
  • Argon | nitrogen
  • Sodium | sulphur
  • Nitrogen | calcium
  • Nitrogen | phosphate

Question 22

Question
______ are the molecules from which _____ and _____ are built.
Answer
  • Amino acids | peptides | proteins
  • Amino acids | lipids | polypeptides

Question 23

Question
Two ______ combine together with the loss of water to form a ______ .
Answer
  • Dipeptide
  • Peptide
  • Polypeptide
  • Protein
  • Base
  • Diglyceride

Question 24

Question
When two amino acids combine to form a dipeptide the linkage they form is known as ______ .
Answer
  • Peptide linkage
  • Esther linkage
  • Glycosidic linkage

Question 25

Question
Enzymes are ______ ______ made out of _____ .
Answer
  • Biological | catalysts | proteins
  • Biological | organisms | peptides

Question 26

Question
In a reaction catalysed by an enzyme, the starting substance is called the ____ and the resulting is the _____ .
Answer
  • Substrate | product
  • Product | substrate
  • Item | Molecule
  • Lock | key

Question 27

Question
While DNA occurs in the chromosomes of the nucleus, so does some RNA however most is found in the _____ .
Answer
  • Cytoplasm
  • Nucleus
  • rER
  • Golgi apparatus
  • Lysosomes
  • Mitochondria

Question 28

Question
A nucleotide consist of three substances combined together which are :
Answer
  • Nitrogenous base
  • Pentose sugar
  • Phosphoric acid
  • Phosphate
  • Lipid
  • Hexose sugar

Question 29

Question
The enzyme _____ catalyses the reaction which occurs when the sugar and phosphate groups of adjacent nucleotides of new strands condense together.
Answer
  • DNA polymerase
  • Helicase
  • Glutamic acid

Question 30

Question
_____ are formed at ribosomes in the _____ .
Answer
  • Proteins | cytoplasm
  • Amino acids | nucleus
  • Amino acids | cytoplasm
  • Proteins | nucleus

Question 31

Question
There are three function types of RNA known as :
Answer
  • (Messenger) mRNA
  • (Transfer) tRNA
  • Ribosomal RNA
  • (Messaging) mRNA
  • (Transcend) tRNA
  • Ribbed RNA

Question 32

Question
mRNA is formed in the _____ and passes out to _____ in the ____, tRNA & ribosomal RNA are occur only in the _____ .
Answer
  • Nucleus | ribosomes | cytoplasm | cytoplasm
  • Nucleus | mitochondria | cytoplasm | ribosomes

Question 33

Question
The steps of protein synthesis in chronological order are :
Answer
  • Transcription | Amino acid activation | Translation
  • Amino acid activation | Translation | Transcription
  • Translation | Transcription | Amino acid activation

Question 34

Question
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.
Answer
  • Nucleus
  • Mitochondria
  • rER
  • Cytoplasm
  • Golgi apparatus

Question 35

Question
_____ catalyses the synthesis of mRNA
Answer
  • RNA polymerase
  • mRNA polymerase
  • Helicase
  • RNA

Question 36

Question
__ bases (a codon) equal 1 amino acid.
Answer
  • 3
  • 2
  • 4
  • 5
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