JAMB Biology 2023

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

Correct Answer: D) Plant cell wall contains cellulose

In mammals, digestion of starch starts in the

A) Stomach B) Small intestine C) Mouth D) Liver

Correct Answer: C) Mouth

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

Correct Answer: D) Stigma

All birds have

A) Two-chambered heart B) Three-chambered heart C) Four-chambered heart D) One-chambered heart

Correct Answer: C) Four-chambered heart

The list of important types of supporting tissues in plant does not include

A) Collenchyma B) Cambium C) Sclerenchyma D) Xylem

Correct Answer: C) Sclerenchyma

Bones of birds are modified for flight by

A) Being long B) Being cartilaginous C) Containing air spaces D) Being filled with marrow

Correct Answer: C) Containing air spaces

Waste products 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

Correct Answer: B) Cell vacuoles and cell wall of leaves

The part of the alimentary system of birds where grinding of maize occurs is

A) Crop B) Gizzard C) Cloaca D) Rectum

Correct Answer: B) Gizzard

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

Correct Answer: A) Fresh kidney of a sheep or pig

The following are examples of food chain in the savanna ecosystem except

A) Grass → Zebra → Lion B) Diatoms → Crayfish → Bony fish C) Seeds → Weaverbird → Civets D) Leaves → Elephant → Vulture

Correct Answer: B) Diatoms → Crayfish → Bony fish

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

Correct Answer: A) Chemicals that break up complex compounds in the cells into simpler compounds

In amoeba, the ectoplasm is bounded by a thin membrane known as the

A) Plasmasol B) Plasmagel C) Plasmalemma D) Protoplasm

Correct Answer: C) Plasmalemma

Centipedes are

A) Equally dangerous as millipedes B) Less dangerous than millipedes C) More dangerous than all D) Not dangerous at all

Correct Answer: C) More dangerous than all

Odontophore is a skeletal structure in the phylum of

A) Pisces B) Echinoderms C) Mollusca D) Amphibians

Correct Answer: C) Mollusca

Wattle is a name of a structure found in

A) Lizard B) Chameleon C) Cock D) Dogfish

Correct Answer: C) Cock

One of these is not a feature of the caudal vertebrae in mammal

A) They possess neural canal B) Their transverse process are poorly developed C) Their neural spines are gradually lost D) There are not many articular surfaces

Correct Answer: A) They possess neural canal

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 eustachian tube D) Possess cells sensitive to balance

Correct Answer: A) Receives sound impulses

The viruses are the smallest known organisms. The outer part is protein and the inner part is

A) Nucleus B) Vacuole C) Particle D) DNA and RNA

Correct Answer: D) DNA and RNA

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 basidiocarp

Correct Answer: B) Algae cells and fungal hyphae

The palisade parenchyma is found in the

A) Stem B) Leaf C) Flower D) Root

Correct Answer: B) Leaf

Increasing complexity due to multicellularity first appeared in this animal group

A) Protozoa B) Coelenterata C) Sarcodina D) Protista

Correct Answer: B) Coelenterata

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

Correct Answer: D) Companion cells

Abscisic acid is a chemical that prepares plants for

A) Ripening fruits B) Emergence of seedlings C) Leaf fall D) Reproduction

Correct Answer: C) Leaf fall

The formula below represents: C6H12O6 → 2C2H6O + 2CO2 + ATP

A) Glycolysis B) Fermentation C) Photosynthesis D) Respiration

Correct Answer: B) Fermentation

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

Correct Answer: A) The mutation rate

In mosses, the sporophyte generation is highly prominent producing spores in a cone-like

A) Gametophyte B) Strobilus C) Antheridium D) Archegonium

Correct Answer: D) Archegonium

When Sudan III solution is boiled with food substances, a black precipitate indicates the presence of

A) Fats and oil B) Protein C) Amino acid D) Starch

Correct Answer: A) Fats and oil

Plants adapted to life in salty marsh are known as

A) Hydrophytes B) Xerophytes C) Halophytes D) Epiphytes

Correct Answer: C) Halophytes

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

Correct Answer: B) Double

In a pyramid of numbers, it is common to have ....... with the smallest number of individuals

A) Secondary consumers B) Tertiary consumers C) Primary consumers D) Primary producers

Correct Answer: B) Tertiary consumers

From the following list of types of mutation, identify the one that is hereditary

A) Genetic mutation B) Somatic mutation C) Germinal mutation D) Gametic mutation

Correct Answer: C) Germinal mutation

Which of these would not be a limiting factor in photosynthesis?

A) O₂ B) CO₂ C) Chlorophyll D) Light

Correct Answer: A) O₂

In a cell digestive enzymes mostly occur in

A) Ribosome B) Lysosome C) Mitochondria D) Plastids

Correct Answer: B) Lysosome

Which of these is not a lipid?

A) Wax B) Sterol C) Glycerol D) Lecithin

Correct Answer: C) Glycerol

Phototropism is

A) A unilateral response to light B) A bilateral response to light C) Both unilateral and bilateral response to light D) A hormonal gradient created within the organ

Correct Answer: A) A unilateral response to light

The site of protein synthesis in a cell is

A) Golgi apparatus B) Ribosomes C) Lysosomes D) Nucleus

Correct Answer: B) Ribosomes

On storage, the sweetness of corn is lost because

A) Polysaccharide is reconverted into soluble sugar B) Concentration of sugar increases due to storage C) Of conversion of sugar to polysaccharide D) Enzymes responsible for the conversion are lost

Correct Answer: C) Of conversion of sugar to polysaccharide

The eye worm is known as

A) Wuchereria bancrofti B) Brugia malayi C) Loa loa D) Dracunculus medinensis

Correct Answer: C) Loa loa

Which of these plants is not a pitcher plant?

A) Nepenthes B) Crotalaria C) Sarracenia D) Dionaea

Correct Answer: B) Crotalaria

One of these arthropods is a carrier of viruses and other microorganisms

A) Termite B) Ant C) Bee D) Flea

Correct Answer: D) Flea