Kingdom of Saudi Arabia
Ministry of Higher Education
Majmaah University
College of Science at Zulfi
‫ الثالث‬:‫المستوى‬
‫المملكة العربية السعودية‬
‫وزارة التعليم العالي‬
‫جامعة المجمعة‬
‫كلية العلوم بالزلفي‬
MDL-214 :‫رقم ورمز المادة‬
‫ أساسيات الكيمياء الحيوية‬:‫اسم المادة‬
:‫الرقم الجامعي‬
:‫اسم الطالب‬
‫هـ‬1432/7/6 :‫تاريخ االمتحان‬
Answer the following questions:
I. Put circle around the correct answer of the followings:
1. Protein denaturation is defined as:
(a) change in solubility
(b) changes in chemical and biological properties
(c) changes in physical properties
(d) all answers are correct
2. The denaturation process of proteins can be achieved by:
(a) Increasing temperature
(b) Chang in pH
(c) Using inorganic salts
(d) All answers are correct
3. Enzymes are composed of
(a) protein
(b) lipid
(c) carbohydrates
(d) All answers are correct
4. Enzymes are found in:
(a) all tissues and fluids of the body
(c) plasma only
(b) blood only
(d) mitochondria only
5. Reversible inhibitors of enzymes include:
(a) Competitive inhibitors
(c) un-competitive inhibitors
(b) non-competitive inhibitors
(d) All
6. Nitrogen bases of DNA include:
(a) adenine , guanine, cytosine and thymine
(c) adenine , guanine, uracil and thymine
(b) adenine , guanine, cytosine and uracil
(d) adenine , guanine, cytosine and ribose
7. Fat soluble vitamins include:
(a) riboflavin
(c) vitamin A
(b) folic acid
(d) thiamin
8. The severe deficiency of thiamin cause:
(a) Beriberi disease
(c ) megaloblastic anemia
(b) pellagra disease
(d) scurvy disease
9. The severe deficiency ascorbic acid cause:
(a) Beriberi disease
(c ) megaloblastic anemia
(b) pellagra disease
(d) scurvy disease
10. Nicotinamide adenine dinucleotide (NAD) is the active form of:
(a) vitamin B3
(b) vitamin B1
(c) vitamin E
(d) vitamin B6
II. Compare between each pair of the followings:
Nucleoside
Nucleotide
Fat
Oil
Pheromones
Sex hormones
Sesquiterpenes
Monoterpenes
RNA
DNA
III. Draw the structure of the followings:
The ring system of all steroids
Dipeptide
Isoprene unit
Neutral amino acid
One of the terpenes
One of the pheromones
Phosphoglyceride
Uronic acid
IV. Complete the following reactions:
D-Glucose +
HIO4
D-Glucose +
[H]
β-D-Glucose +
Starch
H2O
H+ or enzymes
(CH3 CO)2O
NaO2CCH3
H2O
………….……..…….
…………….
H+ or enzymes
Ethanol
enzymes
Triglyceride + 3 H2O
H3N+ CH2 COO- + OH-
H3N+ CH2 COO- + R-C(O)-Cl
H2N CH COOH + H2N CH2 COOH
R
H2O , H+ , heat
Protein
VI. Match each of the following on the right:
1
Collagens
2
Lipoprotein
3
Albumins
4
Hemoglobin
5
Oleic acid
6
Nucleotide
7
Pyrimidine
8
Alanylglycine
9
Amino acid with free amino group
10
Monosaccharide
11
Amino acid
12
Isoprene
13
Purine
14
Serine
15
Micro minerals
16
Valine
17
Cortisone
18
Corn oil
19
Lecithin
20
Vitamin toxicity
The monomer of protein
Protein
Amino acid
Conjugated protein
Steroids
Phosphoglycerides
Lipid
N-terminal amino acid
Neutral amino acid
Bicyclic nitrogenous base
Fibrous protein
The monomer of terpenes
Fatty acid
The monomer of nucleic acid
Globular protein
Hypervitaminosis
The monomer of polysaccharide
Mono cyclic nitrogenous base
Dipeptide
Iron
With my best wishes