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Biochemistry questions.

Biochemistry questions.

Find Biochemistry university examination questions in acaproso.com

# Question
1
  1. Explain the reactions which take place in fatty acids, involving carboxylic group and hydrocarbon chain.Names of all reactants and  products should be clearly indicated.
  2. Glycerol is required in the process of Triglycerides sythesis . Show how glycerol needed for this process is obtained in the body.
  3. Explain the process of fat catabolism, by which the body obtains energy to run different functions when energy from carbohydrates is not available.

Long answers
2
  1. Define the term phospholipid and clearly show the structure of a phospholipid.
  2. Mention four alcohols which are found in phospholipids.
  3. Explain the reactions of the fatty acids which involve the double bonds.
  4. Fatty acids break down to produce Acetyl CoA which undergo oxidation in the Krebs Cycle to produce ATPs. Using a fatty acid with 16 carbon atoms, calculate the amount of energy which will be produced after the oxidation process?

Mathematical Calculation
3
  1. List five properties of enzymes
  2. Explain the relationship between substrate and enzyme concentration.

Short answers
4
  1. Mention five functions of Carbohydrate
  2. i)How many ATP molecules are obtained from each molecule of CoA that completes Kreb`s Cycle

          ii) Describe how are the ATP molecules mentioned in b.(i) above derived from each molecule of Acetyl CoA that enter into Kreb`s Cycle.


Long answers
5
  1. Briefly discuss the biological importance of proteins
  2. With a brief explanation on each, outline any two limitations of analysis of peptides by aqueous acid hydrolysis.

Long answers
6
  1. Explain briefly the phenomenon of complementary bases as it applies to nucleic acids.
  2. Outline the three scenarios where complementary of bases is critical to structure of nucleic acids and flow of genetic information from DNAs to peptides.

Long answers
7

Match words in column A with those related to them in column B:

Column A Column B
  1. Phenylalanine
  2. Threonine
  3. Adenine
  4. Tyrosine
  5. Methionine
  6. Arginine
  7. Isoleucine
  8. Thymine
  1. An amino acid with polar positive charged side group(-R)
  2. Pyrimidine nucleic acid base
  3. An amino acid with the largest hydropathy score
  4. An amino acid with a sulfur atom
  5. An amino acid with aromatic hydrophobic side group (-R)
  6. An amino acid with aromatic polar side group
  7. Purine nucleic acid base
  8. An amino acid with a secondary alcohol on the side group (-R)

 


Matching items
8
  1. Show how lipids produce energy in the body through the eta oxidation process and calculate the amount of energy produced when a fatty acid with 16 carbon atoms is involved in the process.
  2. Discuss the importance of steroids and terpenes clearly showing their structures.
  3. Explain the process of soap formation from lipids.

Long answers
9
  1. Outline five factors that cause an enzyme to be denatured
  2. How would the addition of substrate concentrations in competitive and non-competitive inhibitors affect the rate of enzymatic reactions?

Short answers
10

Mention five types of polysaccharides


Short answers