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King Saud University
Diploma Course In Basic Biochemistry
Final Exam , First Semester 2008-2009
Student's Name: ------------------------------------ Student's No. -------------------------
Q1. Put (√ ) or (X) , correct the (X) one:
10 marks.
1. Atoms of different elements have same masses and properties. ( )
2. Glucogenic a.a´ produces glycogen as an end product ex. Trp. ( )
3. Increase in the PH , causes first α-smino gp.will donate a proton , then α-carboxyl
gp. will donate a proton. ( )
4. Pepsin has it's maximum activity at acidic PH. ( )
5. Sucrose is a reducing sugar, since it can reduce Cu++ to Cu +. ( )
6. The simplest and most abundant lipids is cholesterol. ( )
7.The Pyrimidine Adenine always pair with Purine Thymine by 3 hydrogen bonds.( )
8. UMP is Uridine-5'- mono- phosphate may present in DNA. ( )
9. Hormones are always proteins. ( )
10. One of the factors that regulate Hormones action is Temperature. ( )
Q2. Fill in the Blanks:
10 marks.
1. The no. of electrons lost or gained to form stable system is called…………………..
2. Peptide ……………… contain a peptide bond formed between two a.a´ by a ……
……………………… bond.
3. In chromatography : molecules are separated on the bases of ……………………
Between two phases: ……………………. and ………………………………………
4. At V.max the enzyme is ………………. with it's ………………. and can function
no further.
5. Competitive inhibition can be reversed by …………………………………………..
6. If the CHO contain 2 or more different types of sugar we called it …………………
………….. ex. ………………………….. contains repeating units of ………………..
…………. and ………………………………..
7. Fatty acid general formula is ………………………….
8. glycerol + 3 F.A → ………………………………….
9. The difference between Nucleoside and Nucleotide is ……………………………...
…………………………………………………………………………………………..
10. Enzyme ……………………… catalysis the replication of DNA.
5 marks.
Q3. Give an example of:
1. Interactions stabilizing the 3˚ structure of protein.
2. Protein denaturation .
3. Sphingolipids.
4. Defense protein.
5. Irreversible inhibitor.
Q4. Draw the chemical structure of:
1. Pyrimidine.
4. ATP
2. Tyrosine
5 marks.
3. D-Fructose
5. Deoxyribonucleotide.
5 marks.
Q5. Match:
1. Replication of DNA.
2. Sulfhydryl gp.
3. Chromatography
4. Iodine no.
5. Steroid Hormone
RS
Fats
Cholesterol
Cysteine
Cell Division
Q6. Answer one of the following:
1. Write short note about :
_____
_____
_____
_____
_____
5 marks.
A. Replication of DNA.
B. The difference between DNA and RNA.
2. Enzyme Inhibition.
Good Luck..