Cells, Tissues & Cell Ultrastructure Qs

Question 1

Q1. A histopathologist is examining this biopsy from the small intestine. Which stain has been used to produce this section?

A) Alcian blue
B) Giemsa
C) Haematoxylin and eosin
D) Periodic acid Schiff
E) Perls Prussian Blue

Answer 1

D) Periodic acid Schiff

Question 2

Q2. A histopathologist is examining a sample of connective tissue. What is the shape of these cells?

A) Columnar
B) Fusiform
C) Polygonal
D) Rounded
E) Squamous

Answer 2

B) Fusiform

Question 3

Q3. What is the lifespan of these cells?

A) 5 days
B) 120 days
C) 400 days
D) 3600 days
E) 21000 days

Answer 3

B) 120 days

Question 4

Q4. A researcher is studying the chromatin extracted from cells in a malignant melanoma. What is chromatin?

A) Mitochondrial DNA
B) Nuclear DNA
C) Nuclear DNA + proteins
D) Nuclear RNA
E) Nuclear RNA + proteins

Answer 4

C) Nuclear DNA + proteins

Question 5

Q5. A histopathologist is examining an electron micrograph taken of a cell within a kidney cancer. What is the function of the arrowed organelle?

A) DNA transcription
B) Energy production
C) Lipid degradation
D) Protein degradation
E) Protein synthesis

Answer 5

A) DNA transcription

Question 6

Q6. Different metabolic processes take place in different parts of the cell. Which metabolic process takes place here?

A) Fatty acid metabolism
B) Lipid synthesis
C) Kreb’s cycle
D) Nucleotide phosphorylation
E) Respiratory chain

Answer 6

C) Kreb’s cycle

Question 7

Q7. Whilst examining a blood smear from a patient a haematologist’s attention is caught by the large pale area in this cell. Which organelle causes this pale area?

A) Golgi body
B) Lysosomes
C) Mitochondria
D) Rough ER
E) Smooth ER

Answer 7

A) Golgi body

Question 8

Q8. Examining a plasma cell under an electron microscope reveals that this organelle is abundant within the cytoplasm. What is the function of this organelle?

A) Form complex oligosaccharides
B) Form membrane lipid
C) Protein phosphorylation
D) Proteolysis
E) Synthesise protein

Answer 8

E) Synthesise protein

Question 9

Q9. The cytoskeleton of a cell is made up of a variety of filaments, of different diameters. Which of these filaments has the smallest diameter?

A) Actin
B) Desmin
C) Nuclear laminin
D) Tubulin
E) Vimentin

Answer 9

A) Actin

Question 10

Q10. Sometimes it is difficult to determine what tissue type a cancer has originated from. In such circumstances, using special stains (immunohistochemistry) that stain particular intermediate filaments can help the pathologist identify the cell type. Which of these intermediate filaments is predominantly found in muscle?

A) Cytokeratin
B) Desmin
C) Neurofilament protein
D) Nuclear laminin
E) Vimentin

Answer 10

B) Desmin

Question 11

Q11. What is this pigment?

A) Bilirubin
B) Haemosiderin
C) Lipofuscin
D) Melanin
E) Rhodopsin

Answer 11

C) Lipofuscin

Question 12

Q12. What type of tissue is this?

A) Bone
B) Epithelium
C) Germ cells
D) Muscle
E) Nerve

Answer 12

D) Muscle