By: Hessa Habib

1. The Student Quiz
HB (cytoplasm and cell membrane)
Circle the correct answer:
1- The cell’s components are:
a. Inorganic materials such as water and organic materials such as nucleic
acid
b. cell membrane and cytoskeleton
c. organic materials such as water and inorganic materials such as
protiens
2- Carbohydrates contains C,H ,O only:
a. 4%
b. 1%
c. 10%
3- Human’s cell’s are called __________.
a. eukaryotes
b. prokaryotes
c. WBC
4- When surrounds the organelles it is called as nuclear envelope, Golgi or
mitochondrial membrane.
a. Cytoskeleton
b. cell membrane
c. carbohydrates
5-plasma membrane components:
a. phospholipids, proteins, carbohydrates, cholesterol
b. phospholipids, proteins, carbon, cholesterol
c. phosphate, proteins, carbohydrates, cholesterol

2. 6- glycoprotiens and glycolipids makes up:
a. cell membrane
b. plasma membrane
c. carbohydrates
7- Cholesterol:
a. increases the stability of the cell membrane.
b. prevents the loss of fluids or liquids at low tempreture.
c. both a and b
8- Circle the correct answer (may be more than 1 answer):
a. Inner surface of plasma membrane more negatively charged than outer
surface
b. many molecules are more concentrated eg. extracellular K+ more than
intercellular K+
c. Plasma membrane is a flexible boundary between external and internal
environment
9-Cell markers that allow self-identification of cells in body
a. cell membrane
b. cytoplasm
c. none of the above (the correct answer is receptor proteins)

3. 10- Anchor intracellular cytoskeleton to extracellular matrix
a. linker protein
b. receptor protein
c. integrins
11-The permeability of a membrane:
a. Is independent
b. Depends on the size , nature and concentration
c. Is zero ,not permeable
12-In facilated transport:
a. There is no need for energy
b. It requires energy
c. Proteins are carried from low concentration to high concentration
13-The incorporation of materials from outside the cell by the formation of
vesicles in the plasma membrane
a. exocytosis
b. endocytosis
c. diffusion
14- exocytosis:
a. Doesn’t require a signal to stimulate the secretion of vesicle
b. Requires a signal to stimulate the secretion of vesicle
c. None of the above

4. 15-___________ perform metabolic, synthetic, energy- requiring and energy-
generating functions of the cell.
a. cytoplasmic matrix
b. organelles
c. inclusions
16-The glycogen breakdown is called:
a. glycocolix
b. glycolysis
c . cystol
17- All of the following are membranouse organelles except (can be more than
one answer):
a. lysosomes
b. mitochondria
c. centeriols
18- Ribosomes are produced by:
a. sER and nucleous
b. rER and endoplasmic reticulum
c. rER and nucleolus
19- Abundant in cells specialised in lipid, steroid and glycogen production
a. rER
b. sER
c. Golgi apparatus

5. 20- Autophagy is :
a. digestion of old organells
b. destruction of own cell when cell is injured.
c. digestion of foreign materials
Fill in the blanks:
1- Immature or cis face is ……….Mature or trans face is ……………
2- Sorting and distribution of protein to their final destination are functions of
the ………………
3- Lysosomal enzymes are secreted in ………….and then transported to
…………..where they are modified and packed.
4- Indigestible materials are called ……………. that are released out of the
body.
5- Large quantities of Residual bodies accumulate in heart, muscle and
nuerons and form intracellular pigments such as…………………
Write T for true and F for false and if it’s F write the correct answer.
1- Prexisomes are self replicating, like the mitochondria, not formed in the
Golgi complex. ( )
2- Peroxisomes are numerous in the kidney where toxic substance are
going to accumulate. ( )
3- The outer membrane acts by passive diffusion, while the inner
membrane acts by active transport to prevent diffusion of the contents
of the mitochondrial matrix. ( )
4- Cytoskeleton is the structure that fills the cytoplasm and is important
for movement and stability of the cell. ( )
5- Microfilaments are composed predominantly of a contractile protein
called myosin. ( )
6- Intermediate filaments are either free in the cytoplasm or involved in
building up other organelles such as cilia. ( )
7- Centeriols are absent in animals. ( )
Done by :Hessa Habib