7. Which of the following shows the ions involved in the blood clotting process?
calcium
sodium
iron
nitrate
8. A major risk associated with the use of anticoagulants is
obesity
cardiovascular disease
internal bleeding
high blood pressure
9. Analysis of a sample of DNA found that 40% of the nucleotides contained cytosine. In the same sample of DNA the percentage of nucleotides containing adenine would be
60
10
40
20
10. Hydrolysis results in bonds between glycerol and a fatty acid
being broken and water being used
being broken and water being formed
being formed and water being formed
being formed and water being used
11. Individual mononucleotides in a molecule of mRNA are joined together by
phosphodiester bonds
peptide bonds
glycosidic bonds
hydrogen bonds
12. When a gene that contains 22% adenine is transcribed, the mRNA produced will have
0% cytosine
28% uracil
0% thymine
22% adenine
13. Thrombin is
an enzyme that converts prothrombin into thrombin
a clotting factor released by platelets
a soluble plasma protein
an insoluble protein that forms a mesh to trap red blood cells
14. One advantage of DNA having two complementary strands is that
transcription and replication can occur at the same time
diploid cells can inherit DNA from both parents
semi-conservative replication is possible
hydrolysis of DNA is faster
15. An anticoagulant...
decreases the time taken for a blood clot to form
increases blood cholesterol concentrations
increases the time taken for a blood clot to form
decreases blood cholesterol concentrations
16. Lipase is an enzyme involved in the digestion of triglycerides. Lipase enzymes hydrolyse
peptide bonds to produce fatty acids
ester bonds to produce fatty acids
ester bonds to produce amino acids
peptide bonds to produce amino acids
17. The units for mean BMI are
m kg−2
kg m−2
m2 kg
kg m2
18. A triglyceride is made from
three glycerols and three fatty acids
one glycerol and three fatty acids
three glycerols and one fatty acid
one glycerol and one fatty acid
19. Which of the following is the name of the bond used to join amino acids together?
glycosidic
phosphodiester
peptide
ester
20. Which of the following statements is true about a phospholipid?
