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Salman Bin Abdul-Aziz University
College of Science and Humanity Studies
Biology Department
Course code: Bio 106
First Semester, 1433–1434 H
Time: 50 Min.
First Midterm Exam of Biology Course for Preparatory Year of Medical
Students
Student's Name:
Student's ID:
Class Number:
1. Circle the correct answer (a, b, c or d):
(5 marks)
1. The protein is synthesized by …………………..
a)- DNA molecule
b)- Nucleus
c)- Ribosomes
d)- Nucleolus
2. Members of Kingdom Protista are characterized by……………..
a)- Having true nucleus
b)- Some move by cilia
c)- They are multicellular
d)- Both (a) and (b)
3. The microfilaments are made of a protein called ……………
a)- Tubulin
b)- Myosin
c)- Actin
d)- Dynein
4. Pinocytosis is a type of …………..
a)- Endocytosis
b)- Exocytosis
c)- Passive transport
d)- Facilitated diffusion
5. Which type of lipids is the most important in biological membranes ……….
a)- Wax
b)- Fats
c)- Phospholipid
d)- Oils
6. Living cell release macromolecules via a process called ………………
a)- Endocytosis
b)- Exocytosis
c)- Phagocytosis
d)- Osmosis
7. Protein molecules in the animal-cell membrane function in ………………..
a)- Facilitated diffusion
b)- Diffusion
c)- Active transport
d)- Both (a) and (c)
8. At the cellular level of organization, the fundamental units are ……………
a)- Atoms
b)- Molecules
c)- Organs
d)- Organelles
9. The thickness of Plasma membrane is ………………….
a)- About 18 nm thick
b)- About 8 nm thick
c)- About 80 nm thick
d)- About 180 nm thick
10.Lysosomes are found mainly in ……………….
a)- Prokaryotic cells
b)- Animal cells
c)- Plant cells
d)- Both (b) and (c)
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2. Put (√) in front of true sentences and (X) in front of false ones: (5 marks)
1. Smooth endoplasmic reticulum has ribosomes on its surface
( )
2. Enzymes speed up and lower the activation energy of the reactions
( )
3. Mitochondria are the powerhouses of the cell
( )
4. The central vacuoles are found in both animal and plant cells
( )
5. Ribosomes are made in the cytoplasm
( )
6. Enzymes are lipids having a special site called the active site
( )
7. Lysosomes have digestive enzymes
( )
8. Solution with equal solute concentrations are hypotonic solution
( )
9. The cytoskeleton provides mechanical support for the cell
( )
10. Enzymes are not affected by a reaction and can be reused
( )
3. Write labels of the following figure in the table below:
1.
7.
2.
8.
3.
9.
4.
10.
5.
11.
6.
12.
(5 marks)
Best wishes and Good Luck
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