The arrangements below are steps in protein digestion. Which is the correct sequence?
A. polypetides B.protein C. amino-acids D.peptones
- A. a-b-c-d
- B. c-d-a-b
- C. b-d-a-c
- D. a-d-b-c
- E. b-a-c-d
The figure above is a section of a drupe. The part numbered 2 is
- A. epicarp
- B. endocarp
- C. mesocarp
- D. seed
- E. pericarp
In the figure above the cell which controls the opening and closing of stomatal pore is
- A. 1
- B. 2
- C. 3
- D. 4
- E. 5
One significant difference between roots and stem is that
- A. Branch roots originate in the pericycle while stem do not
- B. Stems are always bove the ground while root are always below the ground
- C. Stems are positively geotropic while roots are negatively geotropic
- D. Stem are sometime used for storage while roots are never used
- E. Stems grow in both length and circumference while root grow only in length
Magnesium is utilized in the formation of
- A. ATP
- B. Glucose
- C. Amino acids
- D. Chlorophyll
- E. Fats
The element nitrogen is utilized in
- A. Formation of ATP
- B. Formation of glucose
- C. Formation of amino acid
- D. Photosynthesis
- E. None of the above
Root hair have their origin from
- A. Endodermis
- B. Pericycle
- C. Cortex
- D. Epidermis
- E. Xylem
Insect show consideration powers of water conservation. This is due to the fact that
- A. The chitinous cuticle is impregnated with tanned protein
- B. Nitrogenous waste is eliminated as urea
- C. Chitin is impermeable to water
- D. The malpighian tubules are impermeable to water
- E. The curticle is covered with wax
Which of these is not true? grass in the above food chain
- A. trap all the sunlight
- B. trap a small percent of the sun energy
- C. are primary producers
- D. are eaten by primary consumers
- E. contains chlorophyll
Grasses grasshopper lizard snakes hawks. In the food chain, the organism which are the least in number are
- A. grasses
- B. grasshopper
- C. lizards
- D. snakes
- E. hawks
The major function of contractile vacuole in amoeba is?
- A. to secrete enzyme to digest food particles
- B. to store excess food materials
- C. to excrete nitrogenous waste
- D. to absorb water from the surrounding
- E. to collect and expel water in the cytoplasm
The one-seeded fuit in which the pericarp and the seed coat have become fused together is known as
- A. achene
- B. samara
- C. caryopsis
- D. legume
- E. drupe
Identical twins are produced under one of the following conditions
- A. Two oval fertilized at the same time by two sperm
- B. one ovum ferilized divides to give two embryos
- C. one ovum fertilized, twins formed shortly before birth
- D. Two ova fertilized by one sperm
- E. one ovum fertilized by two sperm
The maize grain is regarded as a fruit and not a seed because
- A. It is covered by a sheath of leaves
- B. The testa and fruit wall fuse after fertilization
- C. It has both endosperm and cotyledon
- D. It has coleorhiza and coleoptile
- E. The pericarp and seed coat are separated
The blood vessel which carries digested food from the small intestine to the liver is the
- A. Renal vain
- B. Renal artery
- C. Hepatic artery
- D. Hepatic portal vein
- E. Coelic artery
The hepatic portal vein is characterized by
- A. Beginning and ending with capillaries
- B. Connecting the liver and the kidney
- C. Carrying deoxygenated blood
- D. Ending with large capillaries
- E. Having no capillaries
The digestive enzyme that coagulates proteins in milk is
- A. Ptyalin
- B. Pepsin
- C. Renin
- D. Trypsin
- E. Amylase
If you cross breed a tall variety (Tt) of maize with a short variety (tt), the ratio of tall to short plants in the offspring will be
- A. 2:1
- B. 1:2
- C. 1:1
- D. 1:3
- E. 3:1
One of the following statement is not true of viruses
- A. They are micro-organisms
- B. They are smaller than bacteria
- C. They can be seen with an ordinary light microscope
- D. They cause tobacco disease
- E. They cause polio and smallpox
Bacteria inhabiting legume root nodules and which add atmospheric nitrogen to the soil are referred to as
- A. Denitrifying bacteria
- B. Nitrifying bacteria
- C. Nitrogen fixing bacteria
- D. Nitrogen freeing bacteria
- E. Nitrogen putrefying bacteria
Which one of the following is not an excretory product?
- A. Urine
- B. Sweat
- C. Faeces
- D. Salts
- E. Carbon-dioxide