SENIOR FIVE ONLINE BIOLOGY QUIZ

Which of the following is a class?
1. Annelida
2. Coelenterata
3. Oligochaeta
4. Mollusca
The prothallus of a fern is unable to withstand dry atmospheric conditions due to absence of
1. Vascular tissue.
2. Waterstoring region .
3. a cuticle .
4. a root system
. Periplaneta americana gets rid of nitrogenous wastes through structures called
1. Nephridia
2. tracheoles
3. Nephrons
4. Malpighian tubules.
Which of the following is not a protist?
1. Staphylococcus
2. Plasmodium
3. Euglena
4. Trypanosoma
5. Into which phylum would you place the amphioxus?
1. Chordata
2. Porifera
3. Vertebrata
4. Coelenterata
Which of the following best describes the Portuguese man o’ war ? It is a
1. unicellular organism having trichocysts.
2. Triploblastic metazoa
3. Diplobastic multicellular organism
4. Coelenterate with three distinct layers.
Which of the following organisms does not possess antennae?
1. Housefly.
2. Scorpion.
3. Barnacles
4. Millipedes
Which of the following organisms is found in the greatest variety of habitats?
1. Amphibians
2. Reptiles
3. Mammals
4. Insects
Which one of the following vitamins is water soluble?
1. A
2. E
3. D
4. C
Which of the following are target cells for the HIV (AIDS virus).
1. Erythrocytes.
2. Thrombocytes.
3. Lymphocytes.
4. Phagocytes.
A young herbaceous stem maintains an erect position mainly due to
1. lignified tissue in the stem
2. water pressure in the xylem tissue.
3. High turgor pressure in the parenchyma cells.
4. Low osmotic pressure in the parenchyma cells.
Which of the following does not yield smaller units on hydrolysis?
1. Glycogen.
2. Glycerol
3. Sucrose.
4. Starch.
Guard cells differ from normal epidermal cells in that
1. their surface is not covered by cuticle.
2. They have no nuclei.
3. They contain chloroplasts.
4. They do not carry out photosynthesis
Which of the following does NOT require organic materials from the environment?
1. Virus.
2. Euglena.
3. Yeast.
4. Plasmodium
Which function is not carried out by the liver?
1. removal of uric acid from the blood.
2. Storage of iron from haemoglobin.
3. Conversion of glucose to glycogen.
4. Detoxification of alcohol.
Which of the following is found in both DNA and RNA?
1. double helix structure
2. ribose
3. sugar-phoshate chain .
4. thymine
Which of the following statements does NOT apply to colourblindness?
1. It is found frequently in males than females.
2. It does not appear in a female unless it also appeared in the paternal parent.
3. It rarely appears in both father and son, then only if the maternal parent is heterozygous
4. It is found more frequently in the females than in the males.
Which of the following structures plays an important role in the secretory activity of a cell?
1. Golgi body
2. Lysosome
3. Rough endoplasmic reticulum
4. Ribosome
A good example of a prokaryote is
1. Entamoeba
2. Plasmodium
3. Paramecium
4. Nitrosomonas
Which of the following secretions contain an enzyme that digests nucleotides ?
1. Gastric juice
2. Succus entericus
3. Pancreatic juice
4. Saliva
21 The table below shows the surface area and volume of 4 animals.Which one of them would least need a transport system?
1. Animal Surface area (Cm2) Volume (Cm2)
  A. 354 327
2. B. 15 5
3. C. 6 1
4. D 22 8
Which of the following would you expect to increase at successive levels of a food chain?
1. protein content.
2. Total energy content.
3. Concentration of pollutants in organisms.
4. Biomass of organisms.
Which one of the following characteristics of carbonic anhydrase distinguishes it from manganese IV oxide? Carbonic anhydrase
1. initiates and speeds up the rate of a reaction.
2. remains the same at the end of a reaction.
3. may promote reversible reactions.
4. may exert its effects when present even in a small quantity.
Which of the following is NOT a morphological adaptation to reduce water loss in a terrestrial plant?
1. reducing the number of stomata.
2. possession of long roots which absorb water from deep down the soil.
3. possession of hairy epidermis.
4. opening the stomata at night and closing them by the day.
A transverse section of unnamed plant’s leaf when examined under a microscope was found to have an epidermis with a thin cuticle and a broad lamina.The unnamed plant is most likely a
1. hydrophyte.
2. xerophyte.
3. mesophyte.
4. halophyte.
To which of the following phyla does a flat worm belong?
1. Nematoda.
2. Arthropoda.
3. Platy helminthes.
4. Coelenterates.
The lymphatic system is important in
1. promoting blood clotting.
2. distribution of body heat.
3. transporting of hormones around the body.
4. draining excess tissue fluid.
The tails of the phospholipids lie in the centre of the cell membrane due to their being
1. light.
2. hydrophilic.
3. polar
4. hydrophobic
Which of the following mineral nutrients are constituents of chlorophyll?
1. Potassium and sulphur.
2. Nitrogen and magnesium.
3. Calcium and phosphorus.
4. Zinc and copper.
Which one of the following is NOT caused by excess oxygen in a human body?
1. Carbohydrates, fats and proteins are readily used up.
2. The rates of ventilation and heart beat fall.
3. There is a marked increase in the rate of ventilation and cardiac frequency.
4. Carbondioxide is quickly accumulated.
Which one of the following is a shortcoming in the use of dry weight method as a method of measuring plant growth.?
1. Respiratory activity
2. Accumulation of inorganic salt.
3. Loss of plant parts during the drying process.
4. Differential growth of parts.
Which of the following is most closely associated with the transport of fat immediately after absorption from the gut?
1. Tissue fluid.
2. Plasma.
3. Hepatic portal vein.
4. Lymph.
If a woman who is heterozygous for colourblindness marries a normal man,which of the following will be true of their offspring?
1. All of their sons will be colourblind.
2. All of their daughters will be carriers of colourblind.
3. One half of their children of either sex may receive the abnormal allele.
4. All of their children will be carriers.
Which of the following is NOT a cause of seed dormancy?
1. Embryo dormancy.
2. Permeable seed coat.
3. Presence of germination inhibitors.
4. Embryo immaturity
A plant has 22 chromosomes in each of its root cells.What will be the number of chromosomes in each of its gametes?
1. 11
2. 22
3. 33
4. 44
Which one of the following is a storage substance in both plants and animals?
1. Insulin
2. Glycogen.
3. Lipids.
4. Sucrose.
Growth of bacteria in a culture medium would not be affected by:
1. Other microbes present.
2. Light.
3. Nutrients in the culture.
4. Size of the culture.
Haemophilia is caused by a recessive gene and is sex linked:it occurs mainly in males. If a haemophiliac male marries a carrier female,what will be the percentage of haemophiliac daughters among the children?
1. 0
2. 25
3. 50
4. 75
The significance of vascularisation of the endometrium before implantation in mammals is to:
1. ensure firm attachment of the foetus onto the uterine wall.
2. prevent menstruation.
3. assist in producing hormones which maintain pregnancy.
4. facilitates food and oxygen supply to the foetus and removal of excretory products.
Very small mammals cannot live at altitude over 3500 metres on the mountains of East Africa because
1. they would lack suitable food materials.
2. they lack sufficient fur to keep warm.
3. their surface area to volume ratio is too high.
4. at such high altitude,the oxygen partial pressure is too low.

SENIOR FIVE ONLINE BIOLOGY QUIZ

Quiz