UNN Biology 2011/2012 Past Questions

Practice each question, then open it to see the full details.

Iodine turns blue-black on reacting with

A.carbon dioxide
B.simple sugar
C.protein
D.starch

All living things on earth depend on this for their food.

A.Moon
B.Sun
C.Stars
D.Stem

Which is the name of the opening in the human body through which undigested food is thrown out?

A.Auditory meatus
B.Oral cavity
C.Anus
D.Nasal cavity

The scientific name for the human "wind pipe" is

A.trachea
B.bronchus
C.alveoli
D.larynx

The thick-walled blood vessels which carry blood from the heart to all parts of the body are

A.veins
B.venules
C.arteries
D.arterioles

The golgi apparatus serves as the centre of

A.fat production
B.carbohydrate production
C.protein production
D.enzyme production

Plants absorb water from the soil first through the

A.stem cell
B.root hair
C.xylem cells
D.leaf cells

Hygrometer is an instrument used to measure

A.wind speed
B.wind direction
C.oxygen tension
D.relative humidity

The biofuel that can be obtained from cassava or sugar cane is

A.methane
B.diesel
C.kerosene
D.ethanol

An individual of blood group O can be given blood from persons of

A.O group only
B.Any blood group
C.No blood group
D.Any blood group except O

Haemophilia is a condition where there is

A.a failure in the clothing of blood
B.a delay in the clotting of blood
C.no production of haemoglobin in the blood
D.no production of melanin in the skin

Trypsin is an enzyme which changes

A.polysaccharides into disaccharides
B.peptides into amino acids
C.peptones into peptides
D.sucrose into glucose

The bicuspid valve is present between

A.right auricle and right ventricle
B.left auricle and left ventricle
C.right auricle and left ventricle
D.left auricle and right ventricle

The term nephron is used with reference to the

A.liver
B.heart
C.spleen
D.kidney

The bending of the roots towards water represent

A.negative hydrotropism
B.positive hydrotropism
C.phototropism
D.geotropism