O'Level Biology General questions and Answers

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O'Level Biology: General QUESTIONS AND ANSWERS

This Quiz provides you with the objective question of O'Level Biology: General questions with their Answer which are well explained at the end of the Quiz.

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1. An experiment was carried out on the soil sample by adding dilute hydrochloric acid. The student observed bubbles of gas being released. The best conclusion from this this experiment could be:

The acid burnt all living organism in the soil

The soil sample contains carbonate

Soil water reacted with acid and water vapour is released

Micro -organism in the soil escaped

Question 1 of 50

2. Which of the following pairs of vessels would have the highest concentration of sugars

Xylem in plants and hepatic artery in mammals

Phloem in plants and hepatic veins in mammals

Hepatic portal vein in mammals and phloem in plants

Phloem in plants and artery in mammals

Question 2 of 50

3. Which is the source of oxygen given during photosynthesis

Mineral salts

Carbon dioxide

Soil

Water

Question 3 of 50

4. The process of fermentation of sugar is different from oxidation of sugar in cells because it does not

Require oxygen

Require enzymes

From carbon dioxide

Release energy

Question 4 of 50

5. Which of the following process keeps an herbaceous plant erect

Flaccidity

Turgidity

Wilting

Plasmolysis

Question 5 of 50

6. In blood clotting, enzyme thrombin quickens the change of,

Fibrinogen to fibrin

Fibrin to fibrinogen

Prothrombin to thrombokinase

Thrombokinase to prothrombin

Question 6 of 50

7. A man of blood group A marries a women of blood group B and their children are all of blood groups. Which statement best explains the result of blood group of the children

Both parents are homozygous

One parent I homozygous and the other is heterozygous

Both parents are heterozygous

The woman is dominant over the man

Question 7 of 50

8. During a school assembly students stood for a very long time. After sometime, girls and boys starting falling sown one after other. What best explanation can be given for the this sudden occurrence

The students were hungry

The students were angry

There was less supply of blood to the brain

The leg muscle got tired and paralyzed

Question 8 of 50

9. Which is the best definition of cross pollination

The transfer of pollen grains from anther to the stigma

The transfer of pollen grains from anther to stigma of different flowers

The transfer of pollen grains anther of one flower to stigma of different flower but of the same species

The transfer of pollen grain from anther to stigma of the same flower

Question 9 of 50

10. The process by which living organisms obtain and utilize food is called

Excretion

Respiration

Nutrition

Irritability

Question 10 of 50

11. The relationship between fungus and algae is called

Symbiosis

Parasitic

Saprophytic

Question 11 of 50

12. Which of the following is an example of a berry

Avocado

Passion fruit

Ground nut

Coconut

Question 12 of 50

13. Which of the following food substance are not changed by the gut enzyme

Lipids and glucose

Minerals salts and oils

Amino acids and disaccharides

Mineral salt and vitamins

Question 13 of 50

14. Enzymes are said to be specific because they are

Protein

Act in particular PH medium

Act on one kind of substrate

Remain unchanged at the end of the reaction

Question 14 of 50

15. A plant with green leaves growing on a tree with its roots embedded in the stem of the tree is an example of;

A saprophyte

An epiphyte

A symbiont

A parasite

Question 15 of 50

16. Which of the following features distinguishes insects from other arthropods

Jointed legs

Three body parts

Two pairs of wings

A pair of antennae

Question 16 of 50

17. Which one of the following occurs during interphase in mitosis?

Division of the nucleus into two

Construction of the cytoplasm

Duplications of genetic materials

Arrangement of chromosomes on the spindle

Question 17 of 50

18. Mammals have a higher capacity to learn other than other animals due to their enlarge

Medulla oblongata

Cerebellum

Hypothalamus

Cerebrum

Question 18 of 50

19.

Which one of the following activities occurs together in the mammalian skin

Vasodilation, increased sweating, contraction of erector pill muscle

Vasodilation, increases sweating, shivering

Increased sweating, vasodilation, relaxation of erector pill muscle

Vasoconstriction, increased sweating, shivering

Question 19 of 50

20. 20 cm3 of soil was poured in a measuring cylinder, then 50 cm3 of water was added and the mixture was added and the mixture stirred. The volume of the mixture was 68 cm3. What was the percentage of the air in the soil sample?

Question 20 of 50

21. Soil erosion of a gentle slope can best be controlled by

Contour ploughing, terracing, mulching

Application of fertilizers, mixed cropping, deep ploughing

Deep ploughing ,planting cover crops, adding manure

Fallowing, mixed cropping, adding manure

Question 21 of 50

22. A person of blood group A can be transfused with blood of

Group A only

Group A and O

Group AB

Group A and AB

Question 22 of 50

23. Which of the following is adaption for minimizing water loss in plant leaves

Swollen leaves

Numerous stomata

Hairy surface

Large intercellular spaces

Question 23 of 50

24. Which of the following conditions would lead to the formation of dilute urine

Little water intake and release of little ADH into blood stream

Sweeting and release of more ADH into the blood stream

Intake of much salt and release of more ADH into the blood stream

Much water intake and release of the little ADH into the blood stream

Question 24 of 50

25. During swimming in a fish, the caudal fin controls

Pitching

Rolling

Sinking

Forward movement

Question 25 of 50

26. Which one of the following is not an advantage of sexual reproduction?

Offer spring develop fast

Produces resistant offspring

Produces many off springs

Maintains desirable characteristics of offspring

Question 26 of 50

27. In humans, the gene for brown eye is dominant over the blue color. The probability of getting a blue eyed child from a blue eyed mother and father heterozygous for eye colour is

100

Question 27 of 50

28. Which one of the following structures has a dual function of producing enzymes and hormones?

Kidney

Thyroid gland

Ovaries

Pancreases

Question 28 of 50

29. Which of the following is correct about discontinuous trait in population

Individuals within the population vary slightly in the trait

The trait is affected by climatic conditions

The trait appears in distinct forms

It is controlled by several pairs of alleles

Question 29 of 50

30. Which of the following characteristics of leaves is not adaptation for photosynthesis

Branching network of veins

Broad and flat lamina

Waxy cuticle

Intercellular spaces in the mesophyll

Question 30 of 50

31. Which of the following features are characteristics of a cerviaval vertebra

A. Short neural spine and divided transverse process

Large centrum and small transverse

Long neural spine and small centrum

Small neural canal and long neural spine

Question 31 of 50

32. Which one of the following occurs when the ciliary muscle in the mammalian eye is relaxed?

They lens becomes

The suspensory ligament relaxes

The lens becomes thin

The eye is accommodated for near objects

Question 32 of 50

33. Part of a section showed irregular shaped cells which were loosely packed and had few chloroplasts. The part of the leaf is most likely to be that of the

Spongy mesophyll layer

Palisade mesophyll layer

Upper epidermis

Lower epidermis

Question 33 of 50

34. The hormones that stimulate the growth of pubic hair on humans are

Oestrogen and testosterone

Progesterone and luteinizing hormone

Luteinizing hormone and thyroxine

Follicle stimulating hormone and progesterone.

Question 34 of 50

35. Which one of the following groups of the organisms in a food chain contains the least amount of energy?

Tertiary consumers

Secondary consumers

Primary consumers

Producers

Question 35 of 50

36. Which one of the following describes the change from protein to ammonium compounds?

Fermentation

Denitrification

Putrefaction

Nitrification

Question 36 of 50

37. Which one of the following organism does not transport oxygen by the blood?

Cockroach

Frog

Bird

Fish

Question 37 of 50

38. Some plants produce large quantities of pollen grain because

Some of the pollen grains do not mature

Much of the pollen grains never reach the stigma

The pollen is needed by the bees

The pollen gives a nice scent to the plant

Question 38 of 50

39. Which part of the flower develops into a fruit after fertilization?

Ovum

Ovary

Epicalyx

Ovules

Question 39 of 50

40. After fertilization which structures develops into the seed of a flowering plant?

Carpel

Ovule

Ovum

Receptacle

Question 40 of 50

41. Which parts of the flower make up the carpel?

Anther and filament

Ovary, style and anther

Ovary, filament and stigma

Ovary, style and stigma

Question 41 of 50

42. Flowers which have large feathery stigmas are likely to be pollinated by

Wind

Birds

Water

Insects

Question 42 of 50

43. Which of the following adaptations of flowers most favors cross pollination

Flower is bisexual

Male and female parts matures at the same time

Male and female parts are on separate plants

Flowers are buried in the ground

Question 43 of 50

44. The following are list of classes of fruits

i.Legume

ii. Achene

iii. Berry

iv.Capsule

v. Drupe

Which classes of fruits listed above are dry dehiscent fruits?

(ii) and (iii)

(ii) and (v)

(i) and (iv)

(iii) and (v)

Question 44 of 50

45. Which classes are succulent fruits?

(i) and (ii)

(i) and (iv)

(ii) and (iv)

(iii) and (v)

Question 45 of 50

46. Living organism release carbon dioxide. Which life process is shown?

Excretion

Movement

Nutrition

Sensitivity

Question 46 of 50

47. Which of these features is used to classify organism as flowering plants

Roots with hairs

Seeds within fruits

Single-celled spores

Underground stems

Question 47 of 50

48. Why is the epidermis of the leaf is considered a tissue?

The cells have similar structures and functions

The cells allow light to pass through

The cell allow water to enter them by osmosis

The cells are covered by waxy cuticle

Question 48 of 50

49. On a dry sunny day, water vapour moves through the stomata of a leaf. Which phrase describes the movement?

Into the leaf by diffusion

Into the leafy by osmosis

Out of the leaf by diffusion

Out of the leaf by osmosis

Question 49 of 50

50. Which classes are succulent fruits?

(i) and (ii)

(i) and (iv)

(ii) and (iv)

(iii) and (v)

Question 50 of 50

5 thoughts on “O’Level Biology General questions and Answers”

Najjemba Lyna Lyndsy
August 15, 2022 at 6:41 pm

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semanda Augustine
October 31, 2022 at 6:21 pm

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1. JÖSHÎE KÆ
  March 13, 2023 at 11:12 pm
  
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JXRIC
November 19, 2022 at 11:17 am

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Joshie kae
March 13, 2023 at 11:09 pm

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O'Level Biology: General QUESTIONS AND ANSWERS

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