Biology Past Questions And Answers
A student used the following steps in testing for a non-reducing sugar.
I. added Benedict's solution to the sugar solution
ll. added dilute hydrochloric acid to the sugar and boiled it;
lll. added sodium hydroxide solution to the solution in ll. and boiled;
IV. added Benedict's solution to the cooled solution in lll.
Use this information above to answer the question.
Why did the student add the dilute hydrochloric acid to the sugar solution in step ll? To
- A. oxidize the sugar solution
- B. hydrolyse the sugar solution
- C. dry the sugar solution
- D. increase the volume of the sugar solution
One of the major ways in which the blood is able to defend the body against disease causing organisms is
- A. Absorption of fatty acids and glycerol
- B. Clumping
- C. Single circulationD. Translocation
- D. Translocation
A plant cell placed in a solution with a higher water potential will
- A. expand and then shrink
- B. enlarge and become turgid.
- C. expand and then burst
- D. decrease in size and become flaccid
Plant hormones include the following except
- A. insulin
- B. auxin
- C. cytokinin
- D. gibberellin
The anal and dorsal fins of fish are used for:
- A) steering
- B) buoyancy
- C) upward movement
- D) controlling rolling movement
Which of the following reagent is used for testing the presence of protein in food?
- A. Benedict solution
- B. Fehling’s Solution
- C. Millon’s reagent
- D. Sudan III
Clotting of blood is a function of
- A. vitamin C
- B. vitamin K
- C. vitamin B2
- D. vitamin E
Which of the following organisms would be the producer in a food chain?
- A. Goat
- C. maize
- C. man
- D. bacterium
Which of following groups is the most advanced?
- A. Pteridophytes
- B. Bryophytes
- C. Thallophytes
- D. Gymnosperm
A major adaptive feature of endoparasites is the
- A. loss of the organ of movement
- B. presence of claws
- C. loss of the central nervous system
- D. presence of piercing mouthparts