2018 - JAMB Biology Past Questions & Answers - page 1

1

A group of closely related organisms capable of interbreeding to produce the fertile offspring are known as members of a

A
Kingdom
B
class
C
family
D
species
CORRECT OPTION: d
An example of a species is all human beings.
2

A beaker of pond water containing few specimens of Euglena was placed in a dark room for two weeks. At the end of this period, the specimens of Euglena were still alive because they were

A
able to carry out holozoic nutrition
B
able to carry out photosynthesis using carbon dioxide in the pond water
C
better adapted to life in darkness than to life in light
D
not overcrowded
CORRECT OPTION: a
Holozoic nutrition is a type of heterotrophic nutrition that is characterized by the ingestion and internal processing of gaseous, liquid or solid food particles.
3

The cytoplasm of a cell is considered a very important component because it

A
regulates the amount of energy in the cell
B
suspends all cell organelles
C
is the outermost part of the cell
D
is solely responsible for cell division
CORRECT OPTION: b
Most of the important activities of the cell occur in the cytoplasm. Cytoplasm contains molecules such as enzymes which are responsible for breaking down waste and also aid in metabolic activity. Cytoplasm is responsible for giving a cell its shape. It helps to fill out the cell and keeps organelles in their place.
4

Use the diagram shown to answer the question. After an hour, the level of water in the thistle funnel will

A
rise
B
fall
C
remain the same
D
double
CORRECT OPTION: a
5

Use the diagram shown to answer the question. The experiment above is used to demonstrate the process of

A
transportation
B
water culture
C
diffusion
D
osmosis
CORRECT OPTION: d
Osmosis a process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one.
6

Use the diagram shown to answer the question. In plant cells, the role of the membrane is played by the

A
nucleolus
B
cell wall
C
cytoplasm
D
mitochondrion
CORRECT OPTION: b
7

Red blood cells were found to have burst open after being placed in distill for an hour. This phenomenon is known as

A
plasmolysis
B
diffusion
C
haemolysis
D
wilting
CORRECT OPTION: c
Haemolysis is the rupture or destruction of red blood cells.
8

The curvature movement of plants in response to the stimulus of water is called

A
hydrotropism
B
geotropism
C
Phototropism
D
thigmotropism
CORRECT OPTION: a
9

The overall reaction in glycolysis can be summarised as

A
C\(_{6}\)H\(_{12}\)O\(_{6}\) -----> C\(_{3}\)H\(_{4}\)O\(_{3}\) + 4H + ATP
B
C\(_{6}\)H\(_{12}\)O\(_{6}\) -----> 2C\(_{3}\)H\(_{4}\)O\(_{3}\) + 4H + 2ATP
C
C\(_{6}\)H\(_{12}\)O\(_{6}\) -----> 2C\(_{3}\)H\(_{4}\)O\(_{3}\) + 4H + ADP
D
C\(_{6}\)H\(_{12}\)O\(_{6}\) -----> 2C\(_{3}\)H\(_{4}\)O\(_{3}\) + 4H + 2ADP
CORRECT OPTION: b
10

The longest bone in the body is the

A
humerous
B
femur
C
scapula
D
tibia
CORRECT OPTION: b
Femur is your thighbone. It is the longest and strongest bone in your body. Femur is so strong and usually takes a lot of force to break it.
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