Biology Past Questions And Answers
The process in which complex substances are broken down into simpler ones is referred to as
- A. anabolism
- B. catabolism
- C. metabolism
- D. tropism
Spirogyra reproduces vegetatively by
- A) spore production
- B) fragmentation
- C) multiple fission
- D) binary fission
The physical space occupied by an organism together with its functional role in community can be described as
- A. environment
- B. biome
- C. niche
- D. habitat
If a germinating seed is attached horizontally on a revolving klinostat, what will be the effect of the seedling after three days? The
- A. plumule will curve vertically upward while the radicle will curve towards the ground
- B. plumule and radicle will not show any curvature
- C. radicle will curve towards the ground while the plumule will not show any curvature
- D. plumule will curve vertically upward while the radicle will not show any curvature
The factors for two pairs of contrasting characters are inherited independent of each other. This is
- A) Mendel's first law of inheritance
- B) Mendel's second law of inheritance
- C) Mendel's law of segregation of germinal units
- D) Mendel's law of independent pairing of germinal units
Which of the following groups embraces the rest?
- A. Class
- B. Kingdom
- C. Phylum
- D. Species
When an axon is at rest, the concentration of ions on either side of the membrane are different. Which of the following is correct about the concentrations of ions on either side of the membrane?
- A. There is an excess of potassium ions inside the axon and an excess of sodium ions outside
- B. The inside of the axon becomes positively charged while the outside is negatively charged
- C. There is an excess of sodium ions on the inner side of the axon
- D. Chloride and potassium ions begin to move acrossthe membrane
In a test for non-reducing sugars like sucrose, what is the significance of adding dilute hydrochloric acid to the original sugar solution? To
- A. hydrolyse the non-reducing sugar
- B. accelerate he rate of the reaction
- C. stabilize the medium
- D. sterilize the solution
The formation of water in the tissue respiration results from the
- A. breakdown of water molecules
- B. reduction of oxygen by hydrogen
- C. reduction of carbon(IV) oxide
- D. combination of water molecules
The following functions are associated with the liver except
- A. regulation of blood sugar
- B. production of heat
- C. production of fibrinogen
- D. production of vitamin