1) The process by which single cell organisms such as amoeba receive their nutrients a) osmosis b) diffusion c) active transport d) passive diffusion 2) Why do multicellular organisms need a transport system? a) Small SA:Volume b) Several cell layers c) Animals are very active d) All of these e) None of these 3) The type of system where diffusion alone can be used to exchange substances is: a) Open b) Closed 4) Double circulatory systems are needed because a) Blood can flow under different pressures to parts of the body b) The body can use the oxygen twice c) The blood can get pumped under less pressure to the lungs 5) Which is the best description of the heart? a) Open, double circulatory system with 4 chambers b) Closed double circulatory system c) Closed, double circulatory system with 4 chambers divided by a septum 6) Thick walls, narrow lumen which transports blood out of the heart a) Capillaries b) Artery c) Vein 7) What cells allows the vessels to constrict and dilate? a) Fibrin b) Smooth endothelium c) Collagen d) Elastic fibres 8) Which component gives the vessels its tough durability a) Smooth endothelium b) Elastic fibres c) Collagen 9) Which is not a risk factor of CVD? a) Inactivity b) Smoking c) Hours of sleep d) Poor diet e) Gender f) Age 10) Which are the vessels which supply the heart with nutrients? a) Arteries b) Veins c) Capillaries d) Coronary arteries 11) These valves shut during ventricular diastole a) AV valves b) SL valves 12) The stage when SL valves shut a) Atrial systole b) Ventricular systole c) Joint diastole 13) What is damaged firstly, to trigger atherosclerosis? a) Collagen b) Artery walls c) Endothelium cells 14) White blood cells are released in an immune response which causes a build up of what? a) Collagen b) Cholesterol c) Fat d) Calcium + Vit K 15) What is plaque made up of? a) Calcium, cholesterol, vitamin K b) Calcium, cholesterol, vitamin K, cell debris c) Calcium, vitamin K, cell debris d) Cholesterol, vitamin K, cell debris 16) What is released which converts prothrombin into thrombin a) Fibrinogen b) Fibrin c) Thromboplastin d) Platelets 17) What has a carboxyl group, amine group and a side chain a) Amino acid b) Protein c) Fat d) Carbohydrate 18) What is the primary structure of a protein a) Chain of amino acids joined by hydrogen bonds b) Chain of amino acids joined by peptide bonds c) Repeating units of polypeptides 19) Which of these bonds are not involved in the tertiary structure of proteins? a) Hydrogen b) Di sulphide c) Peptide d) Hydrophobic/hydrophillic e) Ionic 20) DNA is made of: a) Bases A,T,C,G b) Nucleotides with bases A,T,C,U c) Nucleotides with bases A,T,C,G d) Bases of AUGC 21) What bond links the sugar and the phosphate of adjacent nucleotides together? a) Phospohorylated b) Hydrogen c) Peptide d) Phosphodiester 22) What enzyme unwinds DNA? a) DNA polymerase b) DNA helicase c) DNA replicase d) DNA insertase 23) What process happens in the nucleus a) Transcription b) Translation c) Polypeptide formation 24) Transcription forms: a) Polypeptides b) Carbohydrates c) mRNA d) tRNA 25) What do triplets on the DNA code for on the mRNA? a) Codons b) Anticodons c) Bases 26) What are tRNA's composed of? a) A start codon and a stop codon b) Anticodon and amino acid c) Anticodon and protein d) Amino acid and stop codon 27) What happens when the stop codon is reached? a) A final amino acid attaches to the primary structure b) The ribosomal complex breaks down c) The protein is hydrolysed d) Conjugated proteins become associated 28) There are many mRNA codons which code for the same amino acid a) True b) False 29) DNA replication is: a) Non mutative b) Semi conservative c) Dispersive d) Good 30) The carbohydrate found in animals a) Starch b) Glucose c) Amylopectin d) Glycogen 31) Branched structure made of alpha glucose with 1,6 and 1,4 glycosidic bonds a) Amylose b) Glycogen c) Amylopectin 32) Energy molecule in plants with an unbranched structure made of alpha glucose with only 1,4 glycosidic bonds a) Amylose b) Glycogen c) Amylopectin 33) Structure made with beta glucose, 1,4 glycosidic bonds a) Glycogen b) Amylose c) Amylopectin d) Cellulose 34) Men have a higher risk of heart disease because: a) They do not produce oestrogen b) They are taller c) They have chest hair 35) Men are always at a higher risk of getting a CVD? a) True b) False 36) Diet is a risk factor of CVD? a) True b) False 37) Why is age a risk factor of CVD? a) Elastic fibres lose their elastic recoil ability b) Smooth muscle cells are much more easily damaged c) Older people have a worse diet

AS Biology Unit 1 SNAB Quiz

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