Exam Body

Year

Subject

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UTME 2020 Biology | Objective

Are you preparing for UTME exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2020 Biology (Objective) questions designed to simulate the real exam environment.

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Question 1

\( 6\text{CO}_2 + 6\text{H}_2\text{O} \xrightarrow[\text{Chlorophyll}]{\text{Sunlight}} \text{C}_6\text{H}_{12}\text{O}_6 + 6\text{O}_2 \uparrow \) The process represented by the above equation is

A. proteinsynthesis

B. respiration

Correct C. photosynthesis

D. transpiration

Correct Answer: C

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Question 2

Which one of the following options is not true for Mucor of Rhizopus? It

A. grows on moist dead organic matter

B. is a plant

Correct C. has cellulose cell wall

D. reproduces asexually by producing spores.

Correct Answer: C

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Question 3

The vacuole of a plant cell is

A. a large empty space

B. smaller than that of an animal cell

C. filled with air

Correct D. surrounded by a membrane

Correct Answer: D

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Question 4

What would happen if solution Y is more concentrated than solution X in the figure above?

A. The level of X would rise, Y would fall

B. The level of X would rise, Y would rise

C. The levels of X and Y would stay the same

Correct D. The level of Y would rise, X would fall

Correct Answer: D

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Question 5

A pyramid of numbers can be defined as

A. the number of plants and animals in an ecosystem

B. an arrangement of organisms according to their habitats

Correct C. the numerical relationships of a food chain

D. the number of plants and animals in a population.

Correct Answer: C

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Question 6

Which of the following instruments is used for determining turbidity of water?

A. Thermometer

Correct B. Secchi disc

C. Rain gauge

D. Hygrometer

Correct Answer: B

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Question 7

In a Biuret test, some protein was mixed with sodium hydroxide solution. Which of the following chemicals should be added to the mixture for a positive result?

A. Mercurous nitrate

Correct B. Copper sulphate

C. Mercuric nitrate

D. Sodium carbonate

Correct Answer: B

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Question 8

Water retention is highest in soils which are rich in

A. sand, poor in humus and devoid of clay

B. clay and sand, but poor in humus

Correct C. clay and humus, but poor in sand

D. clay, poor in humus and devoid of sand

Correct Answer: C

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Question 9

Viruses are regarded as non-living because they

A. can neither reproduce asexually nor sexually

B. cannot survive in their respective environments

C. do not possess characteristics that can be transmitted from one generation to the next

Correct D. can neither respire nor excrete.

Correct Answer: D

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Question 10

The correct sequence of tissues in the anatomy of a young dicotyledonous stem from the inside to the outside is

A. pith, phloem, cambium, xylem, parenchyma, collenchyma and epidermis

B. xylem, phloem, cambium, cortex, endodermis, collenchyma and epidermis

Correct C. pith, xylem, cambium, phloem, collenchyma, parenchyma and epidermis

D. phloem, xylem, cambium, cortex, endodermis, collenchyma and epidermis.

Correct Answer: C

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Question 11

Taxism differs from tropism because

Correct A. the whole organism is affected

B. it is a directional movement

C. it is a response to multi-directional stimuli

D. part of the organism is affected.

Correct Answer: A

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Question 12

The lumbar vertebra when compared with a thoracic vertebra has a

A. longer neural spine

B. wider neural canal

Correct C. thicker centrum

D. shorter transverse process.

Correct Answer: C

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Question 13

Which of the following is formed immediately after the first product of photosynthesis?

A. Lipid

B. Starch

C. Oxygen

Correct D. Sugar.

Correct Answer: D

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Question 14

Fibrinogen and prothrombin play important roles in the

A. deamination of proteins

Correct B. clotting of blood

C. detoxication of substances

D. storage of vitamins.

Correct Answer: B

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Question 15

The flow of air and water in or out of the mesophyll layer of a leaf is controlled by the

Correct A. stomata

B. lenticels

C. air spaces

D. guard cells.

Correct Answer: A

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Question 16

Flame cells are the

A. excretory system of worms

B. excretory and respiratory systems of flatworms

C. secretory system of flatworms

Correct D. excretory system of flatworms.

Correct Answer: D

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Question 17

The part of the brain that controls heart beat and breathing is the

A. olfactory lobe

B. cerebellum

C. cerebral hemisphere

Correct D. medulla oblongata.

Correct Answer: D

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Question 18

In a tropical rain forest, non-epiphytic ferns and allies occur as

A. middle storey species

B. upper storey species

Correct C. shade-loving species

D. emergent species.

Correct Answer: C

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Question 19

The process of deamination is essential for the

A. digestion of protein

B. secretion of bile

Correct C. formation of urea

D. formation of antibody

Correct Answer: C

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Question 20

The small masses of nervous tissue in which many neurons have their nuclei are called

A. dorsal roots

B. ventral roots

Correct C. ganglia

D. synapses.

Correct Answer: C

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Question 21

Mammals acclimatize to reduced oxygen content at high altitudes by

A. the stimulation of marrow to reduce the amount of erythrocytes produced

B. increasing the rate at which erythrocytes are destroyed

Correct C. the stimulation of marrow to produce more erythrocytes

D. increasing the breakdown of the protein portion of the erythrocytes.

Correct Answer: C

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Question 22

The inner ear contains two main organs, namely,

A. eardrum and eustachian tube

Correct B. cochlea and semicircular canals

C. oval window and ossicles

D. pinna and cochlea.

Correct Answer: B

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Question 23

The factor that least affects food shortages in subsaharan Africa is

A. flooding

B. pests

Correct C. mixedcropping

D. drought.

Correct Answer: C

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Question 24

In a field experiment, the frequency of water leaf was observed to be 48 after 20 tosses of a \( 2 \mathrm{~m}^{2} \) quadrat. What is the density of the plant in the field?

Correct A. 1.2 per \( \mathrm{m}^{2} \)

B. 2.4 per \( \mathrm{m}^{2} \)

C. 4.8 per \( \mathrm{m}^{2} \)

D. 9.6 per \( \mathrm{m}^{2} \)

Correct Answer: A

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Question 25

A man and his wife are both heterozygous for the sicklecell trait. The likely percentage of their offspring that will be either carriers or 'sicklers' is

Correct A. \( 75 \% \)

B. \( 50 \% \)

C. 25\%

D. \( 100 \% \)

Correct Answer: A

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