UNEB QUESSTIONS ON CYTOLOGY/HISTOLOGY
1. 2015/1/15 Which of the following epithelium tissues line blood capillaries?
A. Cuboidal tissue
B. Squamous tissue
C. Columnar tissue
D. Glandular tissue
Comment The simple squamous epithelium line the blood capillaries. This is
because it is thin to allow easy diffusion of material through it.
2. 2014/1/4 The function of the nucleoli in a cell is to form
A. The nuclear membrane
B. Ribose
C. The spindle during nuclear division D. Centrioles
Comment The nucleolus is the site of synthesis of ribosomal RNA which is
combined with protein in the cytoplasm to make ribosome
3. 2013/1/4 The figure below shows a glandular tissue
In which part of the mammalian body is the tissue likely to be?
A. Ileum
B. Lungs
C. Stomach
D. Skin
Comment The figure shows a coiled tubular gland. This is typical of the sweat
gland in mammalian skin NB.
The ileum contains simple, tubular glands called crypts of Lieberkühn
The stomach contains simple branched, tubular glands called gastric
glands
The lung do not contain glandular epithelium. Their air sacs are lined
with simple squamous epithelium, whose function is to allow exchange
of gases between gland and alveolar air.
4. 2013/1/12 Which one of the following consists of a pair of tissues specialized for
support?
A. Parenchyma and collenchyma
B. Collenchyma and sclerenchyma
C. Parenchyma and sieve tubes
1
, D. Xylem and phloem
Comment - Collenchyma and sclerenchyma; collenchyma cell have
thickened cellulose wall whereas sclerenchyma have lignified walls
for support.
- Parenchyma tissue is a packing tissue that fills up spaces in plant
organ and as storage tissue but may also be involved in support,
especially when turgid in non-woody plants.
- Xylem is used mainly for transportation of water and mineral salts -
Phloem is mainly for transport of manufactured food.
5. 2012/1/20 The type of feeding mechanism shown in figure below is
droplets
Plasma membrane
A. Pinocytosis
B. Phagocytosis
C. Filter feeding
D. Predation
Comment A form of bulk transport across the plasma membrane in which the
cell membrane invaginates and takes in liquid droplets is called
pinocytosis (cellular drinking)
6. 2012/1/28 One disadvantage of multicellular state is the individual cells
A. Are always small in size
B. Lose independence
C. Becomes less functional
D. Become less specialized
Comment In multicellular organism, cells become specialized to perform certain
functions and therefore lose ability to perform other functions. As a
result, cells become dependent on each other for functions they are not
specialized for.
7. 2012/1/36 The walls of collenchyma cells stained deep blue by methylene blue
but not aniline hydrochloride. This shows that the wall
A. Are not thickened
B. Are thickened by lignin
C. Contains living protoplasm
D. Are thickened by material other than lignin
2
, Comment Thickening of plant cell walls occurs by deposition of extra layer of
cellulose wall of by deposition of lignin or suberin (cock). These
materials are identified in microscopy by their ability to take up
certain stains.
Lignin, for example stains yellow with aniline hydrochloride but does
not stain with methylene blue.
Cellulose does not stain with aniline hydrochloride but stains deep
blue with methylene blue.
8. 2012/12 Squamous epithelium is made up of thin and delicate sheets of cell as
an adaptation to
A. Rapid cell division
B. Facilitation of liquid movement
C. Shortening diffusion distance
D. Protecting the body from abrasion
Comment Squamous epithelium is made of thin delicate call to shorten diffusion
distance.
9. 2010/1/4 The figure below represents a human tissue
The tissue would most likely be lining the
A. Salivary gland
B. Stomach
C. Ileum
D. Oviduct
No answer because the tissue shown is pseudostratified ciliated
epithelium is found in trachea, bronchi and bronchioles.
NB
- The ileum is lined with columnar epithelium possessing microvilli
on their free surface to increase surface area for absorption of food,
it is not ciliated.
- Some renal tubules, e.g., the loop of Henle is lined with cuboidal
epithelium possessing microvilli on their free surfaces to increase
surface area for reabsorption of materials.
- The oviduct is lined by ciliated columnar epithelium, which is
differentiated from pseudo-epithelium ciliated epithelium by the
nuclei of its cells being aligned at the same level
3
1. 2015/1/15 Which of the following epithelium tissues line blood capillaries?
A. Cuboidal tissue
B. Squamous tissue
C. Columnar tissue
D. Glandular tissue
Comment The simple squamous epithelium line the blood capillaries. This is
because it is thin to allow easy diffusion of material through it.
2. 2014/1/4 The function of the nucleoli in a cell is to form
A. The nuclear membrane
B. Ribose
C. The spindle during nuclear division D. Centrioles
Comment The nucleolus is the site of synthesis of ribosomal RNA which is
combined with protein in the cytoplasm to make ribosome
3. 2013/1/4 The figure below shows a glandular tissue
In which part of the mammalian body is the tissue likely to be?
A. Ileum
B. Lungs
C. Stomach
D. Skin
Comment The figure shows a coiled tubular gland. This is typical of the sweat
gland in mammalian skin NB.
The ileum contains simple, tubular glands called crypts of Lieberkühn
The stomach contains simple branched, tubular glands called gastric
glands
The lung do not contain glandular epithelium. Their air sacs are lined
with simple squamous epithelium, whose function is to allow exchange
of gases between gland and alveolar air.
4. 2013/1/12 Which one of the following consists of a pair of tissues specialized for
support?
A. Parenchyma and collenchyma
B. Collenchyma and sclerenchyma
C. Parenchyma and sieve tubes
1
, D. Xylem and phloem
Comment - Collenchyma and sclerenchyma; collenchyma cell have
thickened cellulose wall whereas sclerenchyma have lignified walls
for support.
- Parenchyma tissue is a packing tissue that fills up spaces in plant
organ and as storage tissue but may also be involved in support,
especially when turgid in non-woody plants.
- Xylem is used mainly for transportation of water and mineral salts -
Phloem is mainly for transport of manufactured food.
5. 2012/1/20 The type of feeding mechanism shown in figure below is
droplets
Plasma membrane
A. Pinocytosis
B. Phagocytosis
C. Filter feeding
D. Predation
Comment A form of bulk transport across the plasma membrane in which the
cell membrane invaginates and takes in liquid droplets is called
pinocytosis (cellular drinking)
6. 2012/1/28 One disadvantage of multicellular state is the individual cells
A. Are always small in size
B. Lose independence
C. Becomes less functional
D. Become less specialized
Comment In multicellular organism, cells become specialized to perform certain
functions and therefore lose ability to perform other functions. As a
result, cells become dependent on each other for functions they are not
specialized for.
7. 2012/1/36 The walls of collenchyma cells stained deep blue by methylene blue
but not aniline hydrochloride. This shows that the wall
A. Are not thickened
B. Are thickened by lignin
C. Contains living protoplasm
D. Are thickened by material other than lignin
2
, Comment Thickening of plant cell walls occurs by deposition of extra layer of
cellulose wall of by deposition of lignin or suberin (cock). These
materials are identified in microscopy by their ability to take up
certain stains.
Lignin, for example stains yellow with aniline hydrochloride but does
not stain with methylene blue.
Cellulose does not stain with aniline hydrochloride but stains deep
blue with methylene blue.
8. 2012/12 Squamous epithelium is made up of thin and delicate sheets of cell as
an adaptation to
A. Rapid cell division
B. Facilitation of liquid movement
C. Shortening diffusion distance
D. Protecting the body from abrasion
Comment Squamous epithelium is made of thin delicate call to shorten diffusion
distance.
9. 2010/1/4 The figure below represents a human tissue
The tissue would most likely be lining the
A. Salivary gland
B. Stomach
C. Ileum
D. Oviduct
No answer because the tissue shown is pseudostratified ciliated
epithelium is found in trachea, bronchi and bronchioles.
NB
- The ileum is lined with columnar epithelium possessing microvilli
on their free surface to increase surface area for absorption of food,
it is not ciliated.
- Some renal tubules, e.g., the loop of Henle is lined with cuboidal
epithelium possessing microvilli on their free surfaces to increase
surface area for reabsorption of materials.
- The oviduct is lined by ciliated columnar epithelium, which is
differentiated from pseudo-epithelium ciliated epithelium by the
nuclei of its cells being aligned at the same level
3
