Test
Unit 2 : Chemistry Of Life
Preguntas del test (36)
1The element nitrogen is combined with carbon, hydrogen and oxygen in compounds called _____ from which _____ are constructed .
- AAmino acids | proteins
- BProteins | amino acids
- CLipids | amino acids
- DCarbohydrates | lipids
2The ______ is the smallest part of an element that can take part in a chemical change.
- AAtom
- BMolecule
- CIon
3A polar molecule is one that carries :
- AAn unequal distribution of electrical charge within it.
- BAn equal distribution of electrical charge within it.
4The specific heat capacity refers to :
- Athe amount of heat energy required to raise the temperature of [water}.
- Bthe amount of force required to raise the temperature of [water].
- Cthe amount of energy required to lower to temperature of [water].
5The latent heat of vaporisation refers to :
- Athe amount of energy needed to turn liquid water into water vapour {gas}.
- Bthe amount of energy needed to turn water vapour into liquid water.
6The latent heat fusion refers to :
- AThe amount of energy required to be removed from water to turn it to ice.
- BThe amount of energy required to be given to ice to water to turn it to ice.
7Water reaches its maximum density at __ degrees celsius.
- A4
- B2
- C3
- D5
- E1
- F0
- G-1
8Name the force by which individual molecules stick together.
- ACohesion
- BAdhesion
- CLatent heat of fusion
- DLatent heat of vaporisation
- ESpecific heat capacity
9The force by which individual molecules cling to surrounding surfaces and materials is..?
- AAdhesion
- BCohesion
- CSurface tension
10"Below the surface water molecules slide past each other very easily" -this is an example of which property?
- ALow viscosity
- BHigh viscosity
- CHigh surface tension
- DLow surface tension
11Compounds containing carbon that are found in living organisms are called :
- AOrganic compounds
- BUnhealthy compounds
- CHealthy compounds
- DNutritious compounds
12Examples of monosaccharides, a type of carbohydrate, are :
- AGlucose
- BFructose
- CSucrose
- DLactose
- EMaltose
- FRibose
- GCellulose
- HGlycogen
- IStarch
13Examples of disaccharides {a type of carbohydrate) are :
- ARibose
- BFructose
- CCellulose
- DStarch
- EGlucose
- FSucrose
- GLactose
- HMaltose
- IGlycogen
14Examples of polysaccharides (a type of carbohydrate) are :
- AStarch
- BGlycogen
- CCellulose
- DFructose
- ERibose
- FGlucose
- GMaltose
- HLactose
- ISucrose
15The molecular formula "C{6}H{12}O{6}" shows _____ .
- AGlucose
- BRibose
- CFructose
16When two monosaccharides molecules combine to form a disaccharide and a molecule of water is also formed as a product, this is known as a ______ .
- ACondensation reaction
- BGlycosidic linkage
17_____ appear in living things as animal fats and plant oils, and also as phospholipids of cell membranes.
- ALipids
- BCarbohydrates
- CProteins
- DNucleic acids
18Lipids like carbohydrates also contain carbon, hydrogen and oxygen, but in lipids the proportion of _____ is much _____ .
- AOxygen | less
- BOxygen | more
- CCarbon | more
- DCarbon | less
- EHydrogen | more
- FHydrogen | less
19Fats & oils are compounds called ______ formed by condensation reactions between _____ and an alcohol called _______ forming a bond called _______ .
- ATriglycerides | fatty acids | glycerol | esther linkage
- BLipids | carbohydrates | galactose | esther linkage
20____ produce more energy per gram than _____ due to the presence of less carbon.
- ALipids | carbohydrates
- BCarbohydrates| lipids
21As well as carbon, hydrogen and oxygen , proteins also contain the elements ____ & usually the element _____ .
- ANitrogen | sulphur
- BArgon | nitrogen
- CSodium | sulphur
- DNitrogen | calcium
- ENitrogen | phosphate
22______ are the molecules from which _____ and _____ are built.
- AAmino acids | peptides | proteins
- BAmino acids | lipids | polypeptides
23Two ______ combine together with the loss of water to form a ______ .
- ADipeptide
- BPeptide
- CPolypeptide
- DProtein
- EBase
- FDiglyceride
24When two amino acids combine to form a dipeptide the linkage they form is known as ______ .
- APeptide linkage
- BEsther linkage
- CGlycosidic linkage
25Enzymes are ______ ______ made out of _____ .
- ABiological | catalysts | proteins
- BBiological | organisms | peptides
26In a reaction catalysed by an enzyme, the starting substance is called the ____ and the resulting is the _____ .
- ASubstrate | product
- BProduct | substrate
- CItem | Molecule
- DLock | key
27While DNA occurs in the chromosomes of the nucleus, so does some RNA however most is found in the _____ .
- ACytoplasm
- BNucleus
- CrER
- DGolgi apparatus
- ELysosomes
- FMitochondria
28A nucleotide consist of three substances combined together which are :
- ANitrogenous base
- BPentose sugar
- CPhosphoric acid
- DPhosphate
- ELipid
- FHexose sugar
29The enzyme _____ catalyses the reaction which occurs when the sugar and phosphate groups of adjacent nucleotides of new strands condense together.
- ADNA polymerase
- BHelicase
- CGlutamic acid
30_____ are formed at ribosomes in the _____ .
- AProteins | cytoplasm
- BAmino acids | nucleus
- CAmino acids | cytoplasm
- DProteins | nucleus
31There are three function types of RNA known as :
- A(Messenger) mRNA
- B(Transfer) tRNA
- CRibosomal RNA
- D(Messaging) mRNA
- E(Transcend) tRNA
- FRibbed RNA
32mRNA is formed in the _____ and passes out to _____ in the ____, tRNA & ribosomal RNA are occur only in the _____ .
- ANucleus | ribosomes | cytoplasm | cytoplasm
- BNucleus | mitochondria | cytoplasm | ribosomes
33The steps of protein synthesis in chronological order are :
- ATranscription | Amino acid activation | Translation
- BAmino acid activation | Translation | Transcription
- CTranslation | Transcription | Amino acid activation
34Stage 1 of protein synthesis occurs in the ____ where a complementary copy of the code is made by the building of a molecule of mRNA.
- ANucleus
- BMitochondria
- CrER
- DCytoplasm
- EGolgi apparatus
35_____ catalyses the synthesis of mRNA
- ARNA polymerase
- BmRNA polymerase
- CHelicase
- DRNA
36__ bases (a codon) equal 1 amino acid.
- A3
- B2
- C4
- D5
Información
- Descripción
- IBD (Unit 2 : Chemistry Of Life) Biology Test sobre Unit 2 : Chemistry Of Life, creado por cloud.berry el 26/05/2013.
- Autor
- cloud.berry
- Idioma
- English
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