109756
Descripción
Test por cloud.berry, actualizado hace más de 1 año
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Creado por cloud.berry
hace más de 11 años
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Pregunta 1
Pregunta
The element nitrogen is combined with carbon, hydrogen and oxygen in compounds called _____ from which _____ are constructed .
Respuesta
-
Amino acids | proteins
-
Proteins | amino acids
-
Lipids | amino acids
-
Carbohydrates | lipids
Pregunta 2
Pregunta
The ______ is the smallest part of an element that can take part in a chemical change.
Respuesta
-
Atom
-
Molecule
-
Ion
Pregunta 3
Pregunta
A polar molecule is one that carries :
Respuesta
-
An unequal distribution of electrical charge within it.
-
An equal distribution of electrical charge within it.
Pregunta 4
Pregunta
The specific heat capacity refers to :
Respuesta
-
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].
Pregunta 5
Pregunta
The latent heat of vaporisation refers to :
Respuesta
-
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.
Pregunta 6
Pregunta
The latent heat fusion refers to :
Respuesta
-
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.
Pregunta 7
Pregunta
Water reaches its maximum density at __ degrees celsius.
Respuesta
-
4
-
2
-
3
-
5
-
1
-
0
-
-1
Pregunta 8
Pregunta
Name the force by which individual molecules stick together.
Respuesta
-
Cohesion
-
Adhesion
-
Latent heat of fusion
-
Latent heat of vaporisation
-
Specific heat capacity
Pregunta 9
Pregunta
The force by which individual molecules cling to surrounding surfaces and materials is..?
Respuesta
-
Adhesion
-
Cohesion
-
Surface tension
Pregunta 10
Pregunta
"Below the surface water molecules slide past each other very easily" -this is an example of which property?
Respuesta
-
Low viscosity
-
High viscosity
-
High surface tension
-
Low surface tension
Pregunta 11
Pregunta
Compounds containing carbon that are found in living organisms are called :
Respuesta
-
Organic compounds
-
Unhealthy compounds
-
Healthy compounds
-
Nutritious compounds
Pregunta 12
Pregunta
Examples of monosaccharides, a type of carbohydrate, are :
Respuesta
-
Glucose
-
Fructose
-
Sucrose
-
Lactose
-
Maltose
-
Ribose
-
Cellulose
-
Glycogen
-
Starch
Pregunta 13
Pregunta
Examples of disaccharides {a type of carbohydrate) are :
Respuesta
-
Ribose
-
Fructose
-
Cellulose
-
Starch
-
Glucose
-
Sucrose
-
Lactose
-
Maltose
-
Glycogen
Pregunta 14
Pregunta
Examples of polysaccharides (a type of carbohydrate) are :
Respuesta
-
Starch
-
Glycogen
-
Cellulose
-
Fructose
-
Ribose
-
Glucose
-
Maltose
-
Lactose
-
Sucrose
Pregunta 15
Pregunta
The molecular formula "C{6}H{12}O{6}" shows _____ .
Respuesta
-
Glucose
-
Ribose
-
Fructose
Pregunta 16
Pregunta
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 ______ .
Respuesta
-
Condensation reaction
-
Glycosidic linkage
Pregunta 17
Pregunta
_____ appear in living things as animal fats and plant oils, and also as phospholipids of cell membranes.
Respuesta
-
Lipids
-
Carbohydrates
-
Proteins
-
Nucleic acids
Pregunta 18
Pregunta
Lipids like carbohydrates also contain carbon, hydrogen and oxygen, but in lipids the proportion of _____ is much _____ .
Respuesta
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Oxygen | less
-
Oxygen | more
-
Carbon | more
-
Carbon | less
-
Hydrogen | more
-
Hydrogen | less
Pregunta 19
Pregunta
Fats & oils are compounds called ______ formed by condensation reactions between _____ and an alcohol called _______ forming a bond called _______ .
Respuesta
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Triglycerides | fatty acids | glycerol | esther linkage
-
Lipids | carbohydrates | galactose | esther linkage
Pregunta 20
Pregunta
____ produce more energy per gram than _____ due to the presence of less carbon.
Respuesta
-
Lipids | carbohydrates
-
Carbohydrates| lipids
Pregunta 21
Pregunta
As well as carbon, hydrogen and oxygen , proteins also contain the elements ____ & usually the element _____ .
Respuesta
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Nitrogen | sulphur
-
Argon | nitrogen
-
Sodium | sulphur
-
Nitrogen | calcium
-
Nitrogen | phosphate
Pregunta 22
Pregunta
______ are the molecules from which _____ and _____ are built.
Respuesta
-
Amino acids | peptides | proteins
-
Amino acids | lipids | polypeptides
Pregunta 23
Pregunta
Two ______ combine together with the loss of water to form a ______ .
Respuesta
-
Dipeptide
-
Peptide
-
Polypeptide
-
Protein
-
Base
-
Diglyceride
Pregunta 24
Pregunta
When two amino acids combine to form a dipeptide the linkage they form is known as ______ .
Respuesta
-
Peptide linkage
-
Esther linkage
-
Glycosidic linkage
Pregunta 25
Pregunta
Enzymes are ______ ______ made out of _____ .
Respuesta
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Biological | catalysts | proteins
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Biological | organisms | peptides
Pregunta 26
Pregunta
In a reaction catalysed by an enzyme, the starting substance is called the ____ and the resulting is the _____ .
Respuesta
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Substrate | product
-
Product | substrate
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Item | Molecule
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Lock | key
Pregunta 27
Pregunta
While DNA occurs in the chromosomes of the nucleus, so does some RNA however most is found in the _____ .
Respuesta
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Cytoplasm
-
Nucleus
-
rER
-
Golgi apparatus
-
Lysosomes
-
Mitochondria
Pregunta 28
Pregunta
A nucleotide consist of three substances combined together which are :
Respuesta
-
Nitrogenous base
-
Pentose sugar
-
Phosphoric acid
-
Phosphate
-
Lipid
-
Hexose sugar
Pregunta 29
Pregunta
The enzyme _____ catalyses the reaction which occurs when the sugar and phosphate groups of adjacent nucleotides of new strands condense together.
Respuesta
-
DNA polymerase
-
Helicase
-
Glutamic acid
Pregunta 30
Pregunta
_____ are formed at ribosomes in the _____ .
Respuesta
-
Proteins | cytoplasm
-
Amino acids | nucleus
-
Amino acids | cytoplasm
-
Proteins | nucleus
Pregunta 31
Pregunta
There are three function types of RNA known as :
Respuesta
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(Messenger) mRNA
-
(Transfer) tRNA
-
Ribosomal RNA
-
(Messaging) mRNA
-
(Transcend) tRNA
-
Ribbed RNA
Pregunta 32
Pregunta
mRNA is formed in the _____ and passes out to _____ in the ____, tRNA & ribosomal RNA are occur only in the _____ .
Respuesta
-
Nucleus | ribosomes | cytoplasm | cytoplasm
-
Nucleus | mitochondria | cytoplasm | ribosomes
Pregunta 33
Pregunta
The steps of protein synthesis in chronological order are :
Respuesta
-
Transcription | Amino acid activation | Translation
-
Amino acid activation | Translation | Transcription
-
Translation | Transcription | Amino acid activation
Pregunta 34
Pregunta
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.
Respuesta
-
Nucleus
-
Mitochondria
-
rER
-
Cytoplasm
-
Golgi apparatus
Pregunta 35
Pregunta
_____ catalyses the synthesis of mRNA
Respuesta
-
RNA polymerase
-
mRNA polymerase
-
Helicase
-
RNA
Pregunta 36
Pregunta
__ bases (a codon) equal 1 amino acid.
Respuesta
-
3
-
2
-
4
-
5
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