How well do you understand living things and their vital processes? Whether you are preparing for JAMB, WAEC, NECO and Post-UTME, these Biology past questions and answers cover such subjects as the chemistry of life, botany, evolution, genetics, ecology etc to help you know what to expect, improve your speed and confidence and be really prepared for the actual aptitude test.
Detoxification of urea takes place in the
pancreas
heart
liver
testes
Correct answer is C
No explanation has been provided for this answer.
The diagram below is an illustration of the longitudinal section of a mammalian organ. Study it and answer this question.
What is the main function of the organ?
Excretion
Respiration
Reproduction
Locomotion
Correct answer is A
No explanation has been provided for this answer.
Which of the following is a characteristics of a bacteria except _______?
they can be seen under microscope
they range from 0.5 ยต m in diameter
They are grouped accordingly to their cell shape
they do not cause disease
Correct answer is D
Bacteria is a disease- causing organism, hence all other options hold true except this one.
What organelle is the site of photosynthesis in plants?
Chloroplasts
Ribosomes
Cytoplasm
Mitochondria
Correct answer is A
Chloroplast is the combination of two biological terms, plastid (an organelle in a plant cell), and chloros, which means green. chlorophyll which is an important pigments for photosynthesis.
A ribosome is a complex cellular mechanism used to translate genetic code into chains of amino acids. Long chains of amino acids fold and function as proteins .
The jellylike material that makes up much of a cell inside the cell membrane, and, in eukaryotic cells, surrounds the nucleus.
Mitochondrial is a spherical or elongated organelle in the cytoplasm of nearly all eukaryotic cells, containing genetic material and many enzymes important for cell metabolism, including those responsible for the conversion of food to usable energy.
Agglutination is the _______ of the ________
coagulation, white bloodcell
coagulation, water
white blood cells, red blood cell
coagulation, red blood cell
Correct answer is D
The clumping of cells such as bacteria or red blood cells in the presence of an antibody or complement.
During blood transfusions, the antibodies react with the transfused blood group(if its of different blood group), the erythrocytes clump up and stick together causing them to agglutinate.