The removal of a man’s pancreas by surgical operation can affect only the digestion of
- A. Starch
- B. Starch, protein and fats
- C. Oils and fats
- D. Proteins
- E. Carbohydrates and fats
In the Burret test, some protein was mixed with sodium hydroxide solution. Which of the following chemicals should be added to the mixture for a positive results?
- A. Mercurous nitrates
- B. Copper sulphate
- C. Mercuric nitrate
- D. Sodium carbonate
- E. Ammonium hydroxide
A man with normal haemoglobin (AA) marries a woman who has sickle-cell haemoglobin (SS). They have a child who has a sickle-cell trait. Which of the following genotypes could be associated with the child’s haemoglobin?
- A. AA
- B. OO
- C. AO
- D. AS
- E. SS
Underground stems which grow horizontally through the soil are
- A. Bulbs
- B. Rhizomes
- C. Runners
- D. Corms
- E. Stolons
Anaerobic respiration in yeast produces
- A. Carbondioxide and ethanol
- B. Carbondioxide and water
- C. Carbondioxide and oxygen
- D. Carbondioxide and glucose
- E. Ethanol and water
Pepsin is a digestive enzymes which breaks
- A. Cellulose into glucose molecules
- B. Carbohydrates into simple sugars
- C. Protein into peptones
- D. Fats into glycerol and fatty acid
- E. Sucrose into glucose and fructose
Blood clotting is initiated by
- A. Leucocytes
- B. Platelets
- C. Haemolymph
- D. Haemoglobin
- E. Erythrocytes
Exoskeleton is NOT found in the
- A. Maggot
- B. Mosquito larva
- C. Earth worm
- D. Caterpillar
- E. Termite
The dorsal and anal fins of fish are used for
- A. Upward movement
- B. Controlling rolling
- C. Downward movement
- D. Steering
- E. Buoyancy
Which of the following statement is NOT true of enzymes? They
- A. Are proteins
- B. Need cofactors to activate them
- C. Are sensitive in their action
- D. Are specific in their action
- E. Can withstand high temperature
Osmosis can be defined as the movement of
- A. Molecules from solution of higher concentration to low concentration
- B. Molecules from solution of low concentration to high concentration
- C. Water from solution of high concentration to low concentration
- D. Water across a semi-permeable membrane from solution of low concentration to high concentration
- E. Water across a semi-permeable membrane from solution of high concentration to low concentration
The mammalian organ through which nourishment and oxygen diffuse into a developing embryo is called
- A. Amnion
- B. Chorion
- C. Umbilical cord
- D. Oviduct
- E. Placenta
A mixture of mercurous and mercuric nitrates is added to a food substance. A white precipitates is formed which on gentle heating turns red. The food substance is
- A. Protein
- B. Oil
- C. Carbohydrates
- D. Fat
- E. Fatty acid
The character-producing factors in living organisms are
- A. Chromomeres
- B. Alleles
- C. Chromatids
- D. Chromosomes
- E. Genes
Which of the following cell constituents is NOT common in both plants and animals?
- A. Mitochondria
- B. Chloroplast
- C. Ribosomes
- D. Golgi apparatus
- E. Vacuoles
Which of the following is INCORRECT? The prothallus of a fern
- A. Is flattened heart-shaped structure
- B. Is green because its cells contain chloroplasts
- C. Is the dominant plant
- D. Bears the sexual organ
- E. Is attached to the ground by numerous rizoids
Which of the following invertebrates does NOT possess antennae?
- A. Centipede
- B. Crustacean
- C. Millipede
- D. Insect
- E. Spider
Spirogyra and mucor can be grouped together as Thallophyta because
- A. They are unicellular organisms
- B. Their spores could be dispersed by wind
- C. They are capable of living independent lives
- D. They reproduce sexually only
- E. Their bodies are made up of thallus and filaments alternatively
Mosses, liverworts and ferns can be grouped together because they
- A. Are all aquatic plants
- B. All grow in deserts
- C. Are seedless plants
- D. Have undifferentiated plant bodies
- E. All produce colourless flowers
The male toad differs from the female by having
- A. Vocal sacs
- B. Shorter hind limbs
- C. Longer fore limbs
- D. Bulging eyes
- E. Nictating membranes
The mouth parts of the housefly are adapted for
- A. Lapping and sponging
- B. Sucking and chewing
- C. Piercing and sucking
- D. Chewing and lapping
- E. Biting and chewing