Biology JAMB Questions and Answers 2025 [Revealed!]

This is for UTME Candidates looking for JAMB Biology Questions and Answers 2025. Especially for those aspiring for Medicine, Pharmacy, Nursing and other Health Science courses requiring Biology. Here you will get genuine Biology JAMB questions and answers for 2025. Your duty now is to read through them as many times as possible and get ready to smash your Biology paper. Remember to use the comments sections if you have questions, and don’t forget to join our Free Online Tutorial Classes on Facebook.

What are JAMB Biology Questions and Answers 2025

JAMB Biology Questions and Answers 2025 are the questions you should expect in your Biology paper in 2025 UTME, together with their answers.

It is very important that every candidate preparing to sit for Biology in the forthcoming 2025 JAMB UTME examination should catch a glimpse of these questions.

In so doing, they will know what to expect in the JAMB CBT hall. Knowing exactly what to expect will boost their confidence and guarantee them a very high score.

JAMB Biology Questions and Answers 2025 Revealed!

On this page, we shall reveal JAMB Biology Questions and Answers 2025 for all candidates taking the Biology paper.

How lucky you are to stumble upon this important page!

The questions are genuine and the answers are accurate, and all are a product of our passion to see you excel in your JAMB and gain admission into your dream institution.

In the following sections, you will read the Biology questions you are to expect in your 2025 JAMB exam as well as their answers. You can use the comments section if you still need clarification over some of the questions. We will give you a more detailed explanation.

JAMB is a very serious examination and a lot depend on it. You will answer 40 questions in JAMB Biology 2025 within 26 minutes. So it’s important that you pay attention to the information revealed on this page.

JAMB Biology Questions and Answers 2025 [Numbers 1 – 10]

1. The difference between the cell wall of a plant cell and animal cell is that
A. plant cell wall contains silica
B. animal cell contains stomata in its membrane
C. plant cell is made up of membranes only
D. plant cell wall contains cellulose

2. In mammals, digestion of starch starts in the
A. stomach       B. small intestine
C. mouth          D. liver

3. In the process of pollination of a flowering plant, the pollen grain must touch this structure to start off.
A. petals          B. calyx
C. ovary           D. stigma

4. All birds have
A. two-chambered heart
B. three-chambered heart
C. four-chambered heart
D. one-chambered heart

5. The list of important types of supporting tissues in plant does not include
A. collenchyma        B. cambium
C. sclerenchyma      D. xylem

6. Bones of birds are modified for flight by
A. being long
B. being cartilaginous
C. containing air spaces
D. being filled with marrow

7. The waste product of plant like glycosides, tannins, alkaloids and plant oils may be stored in the
A. xylem
B. cell vacuoles and cell wall of leaves
C. roots, stem tissues and bark
D. pith, stomata and root hairs

8. The part of the alimentary system of bird where grinding of maize occurs is
A. crop           B. gizzard
C. cloak          D. rectum

9. To study the structure of mammalian kidney in a secondary school you need
A. to get fresh kidney of a sheep or a pig
B. to get a fresh kidney of a man
C. to get a fresh kidney of a chick
D. to get a fresh kidney of a toad

10. The following are some examples of food chain in the savanna terrestrial ecosystem except
A. grass→zebra→lion
B. diatoms→crayfish→bony fish
C. seeds→weaverbird→civets
D. leaves→elephant→vulture

Answers to Biology Question Number 1 – 10

1.D     2.C     3.D     4.B     5.C
6.C     7.B     8.B     9.A     10.B

JAMB Biology Questions and Answers 2025 [Numbers 11 – 20]

11. Reptiles and birds lay eggs on dry land. These are special eggs described as
A. ammonic          B. amniotic
C. embryonic        D. chorionic

12. A pollen grain produces two male gametes; one is used to form the zygote while the other forms the endosperm by fusing with
A. other pollens
B. embryo sac
C. polar nuclei
D. haploid spore

13. The main vector of malaria parasite is
A. culex mosquito
B. chrysops
C. anopheles mosquito
D. aedes mosquito

14. When a plant bearing ripe fruits is swayed by the wind and in the process the seeds are scattered the phenomenon is called
A. wind dispersal
B. censer mechanism
C. winged fruits
D. explosive mechanism

15. One of these is not amendment of Mendelian genetics
A. multiple alleles
B. incomplete dominance
C. sex-linked character
D. single factor inheritance

16. The mitochondrion consists of
A. chemicals that break up complex compounds in the cells into simpler compounds
B. rich store of ribonucleic acid
C. digestive enzymes and hormones
D. protein phosphorus and fats

17. In amoeba, the ectoplasm is bounded by a thin membrane known as the
A. plasmasol           B. plasmagel
C. plasmalemma     D. protoplasm

18. Centipedes are
A. equally dangerous as millipedes
B. less dangerous than millipedes
C. more dangerous than all
D. not dangerous at all

19. Odontophore is a skeletal structure in the phylum of
A. pisces           B. echinoderms
C. mollusca       D. amphibians

20. Wattle is a name of a structure found in
A. lizard        B. chameleon
C. cock          D. dogfish

Answers to Biology Question Number 11 – 20

11.B     12.C     13.C     14.B     15.D
16.A     17.C     18.C     19.C     20.C

JAMB Biology Questions and Answers 2025 [Numbers 21 – 30]

21. One of these is not a feature of the caudal vertebrae in mammal
A. they possess neutral canal
B. their transverse process are poorly developed
C. their neural spines are gradually lost
D. there are not many articular surfaces

22. The inner ear has two types of coiled structure called cochlea which
A. receives sound impulses
B. has sensory cell which carry impulses to the spinal cord
C. connects to the eusta chain tube
D. possess cells sensitive to balance

23. The viruses are the smallest known organisms and are divided into two parts; the outer part and the inner part. The outer part is protein and the inner part is
A. nucleus        B. vacuole
C. particle        D. DNA and RNA

24. The thallus of a lichen consists of
A. a virus and a fungus
B. algae cells and fungal hyphae
C. bacterial and fungal cells
D. soredium and basisiopot

25. The palisade parenchyma is found in the
A. steam         B. leaf
C. flower         D. root

26. The tomato fruit is a very good example of
A. an aggregate fruit
B. a drupe
C. a berry
D. a multiple fruit

27. Crenations occur in the red blood cell when
A. it is placed in isotonic solution
B. it is placed in hypertonic solution
C. osmosis is allowed to occur
D. transpiration occurs

28. The capillaries act as filters between
A. the veins
B. the arteries
C. the venules
D. the arteries and the veins

29. The primary openings for gaseous exchange in a plant stem at night are
A. openings in the cuticles
B. stomata
C. lenticels
D. branches

30. The outer membrane covering the brain is known as
A. a brain ventricle
B. a choroid
C. pia mater
D. dura mater

Answers to Biology Question Number 21 – 30

21.A     22.A     23.D     24.B     25.B
26.C    272.B     28.D     29.C     30.D

JAMB Biology Questions and Answers 2025 [Numbers 31 – 40]

1. Increasing complexity due to multicellularity first appeared in this animal group
A. protozoa         B. coelentrata
C. sarcodina        D. protista

2. In the angiosperms, the sieve tube members are living non-nucleated, but they are usually accompanied by
A. cork cambium
B. phloem rays
C. vascular cambium
D. companion cells

3. Abscisic acid is a chemical that prepares plants for
A. ripening fruits
B. emergence of seedlings
C. for leaf fall
D. reproduction

4. The formula below represents
C₆H₁₂O₆ → 2C₂H₆O + 2CO₂ + ATP
A. glycolysis
B. fermentation
C. photosynthesis
D. respiration

5. In any population, any specific allele will mutate at one time or another, usually to a non functional or harmful form. The proportion of gametes carrying new mutant alleles of a given locus is called
A. the mutation rate
B. the selection coefficient
C. the relative fitness
D. the lethal genotype

6. In mosses, the sporophyte generation is highly prominent producing spores in a cone-like
A. gametophyte      B. strobilus
C. Antheridium        D. archegonium

7. When Sudan 111 solution is boiled with a solution of food substances, it gives a colour black precipitate showing the presence of
A. fats and oil      B. protein
C. amino acid      D. starch

8. Plants adapted to life in salty marsh are known as
A. hydrophytes       B. xerophytes
C. halophytes          D. epiphytes

9. A circulatory system that does not allow mixing of oxygenated blood in the mammalian heart is referred to as
A. open         B. double
C. single        D. closed

10. In a pyramid of numbers, it is common to have _______ with the smallest of individuals
A. secondary consumers
B. tertiary consumers
C. primary consumers
D. primary producers

Answers to Biology Question Number 31 – 40

31.B     32.D     33.C     34.B     35.A
36.D     37.A     38.C     39.B     40.B

Read Also: 20 Most Repeated Topics in JAMB Biology Exams 2025

Conclusion

So here you have the 40 Biology Questions you can expect to see in your 2025 JAMB examination. Read them again and again. Ensure that you get very familiar with each of them to the extent that you can readily recognize them any time.

Remember that you can ask for more detailed explanation to any of the above questions in case you don’t fully understand it. Don’t be shy, just scroll down and use the comments section. Drop your questions and expect comprehensive answers as soon as possible.

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