Chemistry for Biologists

Excretion and the liver

1. The amino group is reduced by:
adding nitrogen groups
adding oxygen molecules
adding hydrogen molecules
adding carbonyl groups
2. The amino acid is oxidised by:
adding carbonyl groups
amino groups
adding hydrogen molecules
adding oxygen molecules
3. Enzymes
are more basic at the end of a reaction
will change colour at the end of a reaction
remain unchanged at the end of a reaction
become more acidic at the end of a reaction
4. The production of ammonia is potentially:
harmful to the body and must be removed quickly
harmful to the liver and must be transferred to the stomach quickly
useful to the body as it aids digestion
useful to the body as it stimulates the production of growth hormones during puberty
5. Urea is produced when:
ammonia reacts with carbon dioxide in the presence of enzymes
ammonia reacts with protein in the presence of enzymes
ammonia reacts with carbon dioxide in the presence of water
ammonia reacts with carbon dioxide in the presence of enzymes
6. Nitrogenous compound are compounds that contain:
carbon atoms
sulfur
water molecules
nitrogen
7. Once in the liver amino acids are absorbed by:
muscle cells
nitrogen cells
liver cells
blood cells
8. The bodies of mammals are unable to store:
blood
amino acids
fats
carbohydrates
9. Deamination is the removal of:
carbonyl groups
amino groups
hydrogen
oxygen
10. Excretion is the removal of:
hair from the body
DNA from cheek cells
fats from proteins
toxic substances from the body

 

RSC