MCQ Quiz questions Flashcards
Approximately how long ago were farm animals first domesticated?
a. 1000 years ago
b. 10,000 years ago
c. 100,000 years ago
b
Which molecules form the main component of cell membrane?
a. actin
b. carbohydrate
c. cholesterol
d. phospholipids
d
Cereal grains are generally a poor source of which mineral?
a. magnesium
b. calcium
c. sodium
d. sulphur
b
Which of the following options has the highest burden of disease 9using DALY’s measure) of all the foodborne illnesses?
a. campylobacter spp
b. escherichia coli 0157
c. toxoplasma gondii
c
Which dairy breed is known for producing milk with a high percentage of fat and protein?
a. holstein friesian
b. norwegian red
c. jersey
d. ayrshire
c
Most systemic infections gain access to the body via which route?
a. conjuctiva
b. insect vectors
c. intra venous catheters
d. mucosal surfaces
d
What is a specific feature of spinal reflexes?
a. they involve only afferent somatic and efferent motor neurones
b. those seen in the hind limbs are lost if the spinal cord is transected at the level of the thorax
c. they involve afferent somatic neurones and efferent motor neurones and may involve interneurones within the spinal cord
d. they cannot be modified by central (brain) control
d
Which histological stain is most commonly used to stain sectioned tissues for light microscopy?
a. hematoxylin and eosin
b. masson’s trichrome
c. may-grunwald’s giemsa
d. periodic-acid schiff
a
The membrane potential of a typical mammalian neurone sits at approximately -70mV. What is the main factor that maintains this membrane potential?
a. the absence of negatively proteins in the intracellular fluid
b. the actions of the ATP dependent Na+/K+ pump in the cell membrane, which results in net movement of positive charge into the cell
c. the greater permeability of the cell to K+ relative to Na+
d. the impermeability of the cell to Cl-
c
What is the process involved in the formation of RNA from a DNA template called?
a. expression
b. replication
c. transcription
d. transformation
c
What is the main function of tRNA in protein synthesis?
a. functions to promote RNA synthesis
b. identifies amino acids and transfers them to ribesome
c. inhibits protein synthesis
d. protein folding
b
How many hydrogen bonds pair guanine with cytosine in DNA?
a. 1
b. 2
c. 3
d. 4
c
In DNA replication, which enzyme is used to join DNA segments together?
a. caspase
b. DNA ligase
c. DNA polymerase
d. endonuclease
b
An example of a zoonotic disease would be:
a. coronary artery disease
b. glaucoma
c. osteo-arthritis
d. salmonella
d
Infections are more severe in which age group?
a. adolescents
b. children
c. middle aged
d. neonates
d